add libs by davidegironi
parent
e4b0ff8721
commit
f7ec99c944
@ -0,0 +1,480 @@
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/*
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lcdpcf8574 lib 0x03
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copyright (c) Davide Gironi, 2013
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Released under GPLv3.
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Please refer to LICENSE file for licensing information.
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*/
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#include <inttypes.h>
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#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include "../pcf8574/pcf8574.h"
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#include "lcdpcf8574.h"
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#define lcd_e_delay() __asm__ __volatile__( "rjmp 1f\n 1:" );
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#define lcd_e_toggle() toggle_e()
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#if LCD_LINES==1
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE
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#else
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES
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#endif
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volatile uint8_t dataport = 0;
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/*
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** function prototypes
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*/
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static void toggle_e(void);
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/*
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** local functions
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*/
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/*************************************************************************
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delay loop for small accurate delays: 16-bit counter, 4 cycles/loop
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*************************************************************************/
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static inline void _delayFourCycles(unsigned int __count)
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{
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if ( __count == 0 )
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__asm__ __volatile__( "rjmp 1f\n 1:" ); // 2 cycles
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else
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__asm__ __volatile__ (
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"1: sbiw %0,1" "\n\t"
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"brne 1b" // 4 cycles/loop
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: "=w" (__count)
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: "0" (__count)
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);
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}
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/*************************************************************************
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delay for a minimum of <us> microseconds
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the number of loops is calculated at compile-time from MCU clock frequency
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*************************************************************************/
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#define delay(us) _delayFourCycles( ( ( 1*(F_CPU/4000) )*us)/1000 )
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/* toggle Enable Pin to initiate write */
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static void toggle_e(void)
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{
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pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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lcd_e_delay();
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pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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}
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/*************************************************************************
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Low-level function to write byte to LCD controller
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Input: data byte to write to LCD
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rs 1: write data
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0: write instruction
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Returns: none
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*************************************************************************/
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static void lcd_write(uint8_t data,uint8_t rs)
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{
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if (rs) /* write data (RS=1, RW=0) */
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dataport |= _BV(LCD_RS_PIN);
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else /* write instruction (RS=0, RW=0) */
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dataport &= ~_BV(LCD_RS_PIN);
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dataport &= ~_BV(LCD_RW_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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/* output high nibble first */
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dataport &= ~_BV(LCD_DATA3_PIN);
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dataport &= ~_BV(LCD_DATA2_PIN);
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dataport &= ~_BV(LCD_DATA1_PIN);
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dataport &= ~_BV(LCD_DATA0_PIN);
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if(data & 0x80) dataport |= _BV(LCD_DATA3_PIN);
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if(data & 0x40) dataport |= _BV(LCD_DATA2_PIN);
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if(data & 0x20) dataport |= _BV(LCD_DATA1_PIN);
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if(data & 0x10) dataport |= _BV(LCD_DATA0_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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lcd_e_toggle();
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/* output low nibble */
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dataport &= ~_BV(LCD_DATA3_PIN);
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dataport &= ~_BV(LCD_DATA2_PIN);
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dataport &= ~_BV(LCD_DATA1_PIN);
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dataport &= ~_BV(LCD_DATA0_PIN);
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if(data & 0x08) dataport |= _BV(LCD_DATA3_PIN);
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if(data & 0x04) dataport |= _BV(LCD_DATA2_PIN);
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if(data & 0x02) dataport |= _BV(LCD_DATA1_PIN);
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if(data & 0x01) dataport |= _BV(LCD_DATA0_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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lcd_e_toggle();
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/* all data pins high (inactive) */
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dataport |= _BV(LCD_DATA0_PIN);
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dataport |= _BV(LCD_DATA1_PIN);
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dataport |= _BV(LCD_DATA2_PIN);
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dataport |= _BV(LCD_DATA3_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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}
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/*************************************************************************
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Low-level function to read byte from LCD controller
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Input: rs 1: read data
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0: read busy flag / address counter
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Returns: byte read from LCD controller
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*************************************************************************/
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static uint8_t lcd_read(uint8_t rs)
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{
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uint8_t data;
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if (rs) /* write data (RS=1, RW=0) */
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dataport |= _BV(LCD_RS_PIN);
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else /* write instruction (RS=0, RW=0) */
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dataport &= ~_BV(LCD_RS_PIN);
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dataport |= _BV(LCD_RW_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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/* read high nibble first */
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pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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lcd_e_delay();
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data = 0;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA0_PIN)) data |= 0x10;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA1_PIN)) data |= 0x20;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA2_PIN)) data |= 0x40;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA3_PIN)) data |= 0x80;
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pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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/* Enable 500ns low */
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lcd_e_delay();
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/* read low nibble */
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pcf8574_setoutputpinhigh(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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lcd_e_delay();
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA0_PIN)) data |= 0x01;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA1_PIN)) data |= 0x02;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA2_PIN)) data |= 0x04;
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if(!pcf8574_getinputpin(LCD_PCF8574_DEVICEID, LCD_DATA3_PIN)) data |= 0x08;
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pcf8574_setoutputpinlow(LCD_PCF8574_DEVICEID, LCD_E_PIN);
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return data;
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}
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/*************************************************************************
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loops while lcd is busy, returns address counter
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*************************************************************************/
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static uint8_t lcd_waitbusy(void)
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{
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register uint8_t c;
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/* wait until busy flag is cleared */
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while ( (c=lcd_read(0)) & (1<<LCD_BUSY)) {}
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/* the address counter is updated 4us after the busy flag is cleared */
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delay(2);
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/* now read the address counter */
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return (lcd_read(0)); // return address counter
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}/* lcd_waitbusy */
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/*************************************************************************
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Move cursor to the start of next line or to the first line if the cursor
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is already on the last line.
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*************************************************************************/
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static inline void lcd_newline(uint8_t pos)
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{
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register uint8_t addressCounter;
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#if LCD_LINES==1
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addressCounter = 0;
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#endif
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#if LCD_LINES==2
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if ( pos < (LCD_START_LINE2) )
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addressCounter = LCD_START_LINE2;
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else
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addressCounter = LCD_START_LINE1;
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#endif
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#if LCD_LINES==4
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if ( pos < LCD_START_LINE3 )
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addressCounter = LCD_START_LINE2;
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else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4) )
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addressCounter = LCD_START_LINE3;
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else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2) )
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addressCounter = LCD_START_LINE4;
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else
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addressCounter = LCD_START_LINE1;
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#endif
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lcd_command((1<<LCD_DDRAM)+addressCounter);
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}/* lcd_newline */
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/*
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** PUBLIC FUNCTIONS
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*/
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/*************************************************************************
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Send LCD controller instruction command
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Input: instruction to send to LCD controller, see HD44780 data sheet
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Returns: none
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*************************************************************************/
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void lcd_command(uint8_t cmd)
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{
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lcd_waitbusy();
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lcd_write(cmd,0);
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}
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/*************************************************************************
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Send data byte to LCD controller
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Input: data to send to LCD controller, see HD44780 data sheet
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Returns: none
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*************************************************************************/
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void lcd_data(uint8_t data)
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{
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lcd_waitbusy();
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lcd_write(data,1);
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}
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/*************************************************************************
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Clear CGRAM
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*************************************************************************/
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void lcd_clear_CGRAM() {
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register uint8_t addressCounter = 0;
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for (; addressCounter < 64; addressCounter++) {
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lcd_command((1 << LCD_CGRAM) + addressCounter);
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lcd_putc(0x00);
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}
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}
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/*************************************************************************
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Define custom character in CGRAM
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Inputs: charnum: Character position in CGRAM. You can define maximum 8 chars.
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values[]: Custom character descriptor pointer.
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Returns: 0 - The custom character successfully created
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1 - If the charnum greater than 7. You can define maximum 8 chars.
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*************************************************************************/
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uint8_t lcd_create_custom_char(uint8_t charnum, const uint8_t * values) {
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register uint8_t j = 0;
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const uint8_t *p = values;
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if (charnum > 7) {
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return 1;
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}
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lcd_command((1 << LCD_CGRAM) + charnum * 8); // set CGRAM address charnum * 8 byte
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for (; j < 8; j++) {
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lcd_putc (*(p + j)); // write 8 byte data (one character) to CGRAM
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}
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return (0);
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}
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/*************************************************************************
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Set cursor to specified position
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Input: x horizontal position (0: left most position)
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y vertical position (0: first line)
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Returns: none
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*************************************************************************/
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void lcd_gotoxy(uint8_t x, uint8_t y)
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{
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#if LCD_LINES==1
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
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#endif
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#if LCD_LINES==2
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if ( y==0 )
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
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else
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
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#endif
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#if LCD_LINES==4
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if ( y==0 )
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
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else if ( y==1)
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
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else if ( y==2)
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE3+x);
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else /* y==3 */
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE4+x);
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#endif
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}/* lcd_gotoxy */
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/*************************************************************************
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*************************************************************************/
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int lcd_getxy(void)
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{
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return lcd_waitbusy();
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}
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/*************************************************************************
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Clear display and set cursor to home position
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*************************************************************************/
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void lcd_clrscr(void)
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{
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lcd_command(1<<LCD_CLR);
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}
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/*************************************************************************
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Set illumination pin
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*************************************************************************/
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void lcd_led(uint8_t onoff)
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{
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if(onoff)
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dataport &= ~_BV(LCD_LED_PIN);
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else
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dataport |= _BV(LCD_LED_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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}
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/*************************************************************************
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Set cursor to home position
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*************************************************************************/
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void lcd_home(void)
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{
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lcd_command(1<<LCD_HOME);
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}
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/*************************************************************************
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Display character at current cursor position
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Input: character to be displayed
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Returns: none
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*************************************************************************/
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void lcd_putc(char c)
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{
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uint8_t pos;
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pos = lcd_waitbusy(); // read busy-flag and address counter
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if (c=='\n')
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{
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lcd_newline(pos);
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}
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else
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{
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#if LCD_WRAP_LINES==1
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#if LCD_LINES==1
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
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}
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#elif LCD_LINES==2
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);
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}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ){
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
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}
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#elif LCD_LINES==4
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);
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}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3,0);
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}else if ( pos == LCD_START_LINE3+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4,0);
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}else if ( pos == LCD_START_LINE4+LCD_DISP_LENGTH ) {
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
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}
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#endif
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lcd_waitbusy();
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#endif
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lcd_write(c, 1);
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}
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}/* lcd_putc */
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/*************************************************************************
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Display string without auto linefeed
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Input: string to be displayed
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Returns: none
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*************************************************************************/
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void lcd_puts(const char *s)
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/* print string on lcd (no auto linefeed) */
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{
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register char c;
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while ( (c = *s++) ) {
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lcd_putc(c);
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}
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}/* lcd_puts */
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/*************************************************************************
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Display string from program memory without auto linefeed
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Input: string from program memory be be displayed
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Returns: none
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*************************************************************************/
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void lcd_puts_p(const char *progmem_s)
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/* print string from program memory on lcd (no auto linefeed) */
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{
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register char c;
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while ( (c = pgm_read_byte(progmem_s++)) ) {
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lcd_putc(c);
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}
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}/* lcd_puts_p */
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/*************************************************************************
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Initialize display and select type of cursor
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Input: dispAttr LCD_DISP_OFF display off
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LCD_DISP_ON display on, cursor off
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LCD_DISP_ON_CURSOR display on, cursor on
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LCD_DISP_CURSOR_BLINK display on, cursor on flashing
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Returns: none
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*************************************************************************/
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void lcd_init(uint8_t dispAttr)
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{
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#if LCD_PCF8574_INIT == 1
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//init pcf8574
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pcf8574_init();
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#endif
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dataport = 0;
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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delay(16000); /* wait 16ms or more after power-on */
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/* initial write to lcd is 8bit */
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dataport |= _BV(LCD_DATA1_PIN); // _BV(LCD_FUNCTION)>>4;
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dataport |= _BV(LCD_DATA0_PIN); // _BV(LCD_FUNCTION_8BIT)>>4;
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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lcd_e_toggle();
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delay(4992); /* delay, busy flag can't be checked here */
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/* repeat last command */
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lcd_e_toggle();
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delay(64); /* delay, busy flag can't be checked here */
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/* repeat last command a third time */
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lcd_e_toggle();
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delay(64); /* delay, busy flag can't be checked here */
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/* now configure for 4bit mode */
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dataport &= ~_BV(LCD_DATA0_PIN);
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pcf8574_setoutput(LCD_PCF8574_DEVICEID, dataport);
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lcd_e_toggle();
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delay(64); /* some displays need this additional delay */
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/* from now the LCD only accepts 4 bit I/O, we can use lcd_command() */
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lcd_command(LCD_FUNCTION_DEFAULT); /* function set: display lines */
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lcd_command(LCD_DISP_OFF); /* display off */
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lcd_clrscr(); /* display clear */
|
||||
lcd_command(LCD_MODE_DEFAULT); /* set entry mode */
|
||||
lcd_command(dispAttr); /* display/cursor control */
|
||||
|
||||
}/* lcd_init */
|
||||
@ -0,0 +1,223 @@
|
||||
/*
|
||||
lcdpcf8574 lib 0x03
|
||||
|
||||
copyright (c) Davide Gironi, 2013
|
||||
|
||||
Released under GPLv3.
|
||||
Please refer to LICENSE file for licensing information.
|
||||
|
||||
References:
|
||||
+ based on lcd library by Peter Fleury
|
||||
http://jump.to/fleury
|
||||
+ CGRAM functions by Péter Papp
|
||||
*/
|
||||
|
||||
|
||||
#ifndef LCD_H
|
||||
#define LCD_H
|
||||
|
||||
#include <inttypes.h>
|
||||
#include <avr/pgmspace.h>
|
||||
|
||||
#define LCD_PCF8574_INIT 1 //init pcf8574
|
||||
|
||||
#define LCD_PCF8574_DEVICEID 0 //device id, addr = pcf8574 base addr + LCD_PCF8574_DEVICEID
|
||||
|
||||
|
||||
/**
|
||||
* @name Definitions for Display Size
|
||||
* Change these definitions to adapt setting to your display
|
||||
*/
|
||||
#define LCD_LINES 2 /**< number of visible lines of the display */
|
||||
#define LCD_DISP_LENGTH 16 /**< visibles characters per line of the display */
|
||||
#define LCD_LINE_LENGTH 0x40 /**< internal line length of the display */
|
||||
#define LCD_START_LINE1 0x00 /**< DDRAM address of first char of line 1 */
|
||||
#define LCD_START_LINE2 0x40 /**< DDRAM address of first char of line 2 */
|
||||
#define LCD_START_LINE3 0x14 /**< DDRAM address of first char of line 3 */
|
||||
#define LCD_START_LINE4 0x54 /**< DDRAM address of first char of line 4 */
|
||||
#define LCD_WRAP_LINES 1 /**< 0: no wrap, 1: wrap at end of visibile line */
|
||||
|
||||
|
||||
|
||||
#define LCD_DATA0_PIN 4 /**< pin for 4bit data bit 0 */
|
||||
#define LCD_DATA1_PIN 5 /**< pin for 4bit data bit 1 */
|
||||
#define LCD_DATA2_PIN 6 /**< pin for 4bit data bit 2 */
|
||||
#define LCD_DATA3_PIN 7 /**< pin for 4bit data bit 3 */
|
||||
#define LCD_RS_PIN 0 /**< pin for RS line */
|
||||
#define LCD_RW_PIN 1 /**< pin for RW line */
|
||||
#define LCD_E_PIN 2 /**< pin for Enable line */
|
||||
#define LCD_LED_PIN 3 /**< pin for Led */
|
||||
|
||||
|
||||
/**
|
||||
* @name Definitions for LCD command instructions
|
||||
* The constants define the various LCD controller instructions which can be passed to the
|
||||
* function lcd_command(), see HD44780 data sheet for a complete description.
|
||||
*/
|
||||
|
||||
/* instruction register bit positions, see HD44780U data sheet */
|
||||
#define LCD_CLR 0 /* DB0: clear display */
|
||||
#define LCD_HOME 1 /* DB1: return to home position */
|
||||
#define LCD_ENTRY_MODE 2 /* DB2: set entry mode */
|
||||
#define LCD_ENTRY_INC 1 /* DB1: 1=increment, 0=decrement */
|
||||
#define LCD_ENTRY_SHIFT 0 /* DB2: 1=display shift on */
|
||||
#define LCD_ON 3 /* DB3: turn lcd/cursor on */
|
||||
#define LCD_ON_DISPLAY 2 /* DB2: turn display on */
|
||||
#define LCD_ON_CURSOR 1 /* DB1: turn cursor on */
|
||||
#define LCD_ON_BLINK 0 /* DB0: blinking cursor ? */
|
||||
#define LCD_MOVE 4 /* DB4: move cursor/display */
|
||||
#define LCD_MOVE_DISP 3 /* DB3: move display (0-> cursor) ? */
|
||||
#define LCD_MOVE_RIGHT 2 /* DB2: move right (0-> left) ? */
|
||||
#define LCD_FUNCTION 5 /* DB5: function set */
|
||||
#define LCD_FUNCTION_8BIT 4 /* DB4: set 8BIT mode (0->4BIT mode) */
|
||||
#define LCD_FUNCTION_2LINES 3 /* DB3: two lines (0->one line) */
|
||||
#define LCD_FUNCTION_10DOTS 2 /* DB2: 5x10 font (0->5x7 font) */
|
||||
#define LCD_CGRAM 6 /* DB6: set CG RAM address */
|
||||
#define LCD_DDRAM 7 /* DB7: set DD RAM address */
|
||||
#define LCD_BUSY 7 /* DB7: LCD is busy */
|
||||
|
||||
/* set entry mode: display shift on/off, dec/inc cursor move direction */
|
||||
#define LCD_ENTRY_DEC 0x04 /* display shift off, dec cursor move dir */
|
||||
#define LCD_ENTRY_DEC_SHIFT 0x05 /* display shift on, dec cursor move dir */
|
||||
#define LCD_ENTRY_INC_ 0x06 /* display shift off, inc cursor move dir */
|
||||
#define LCD_ENTRY_INC_SHIFT 0x07 /* display shift on, inc cursor move dir */
|
||||
|
||||
/* display on/off, cursor on/off, blinking char at cursor position */
|
||||
#define LCD_DISP_OFF 0x08 /* display off */
|
||||
#define LCD_DISP_ON 0x0C /* display on, cursor off */
|
||||
#define LCD_DISP_ON_BLINK 0x0D /* display on, cursor off, blink char */
|
||||
#define LCD_DISP_ON_CURSOR 0x0E /* display on, cursor on */
|
||||
#define LCD_DISP_ON_CURSOR_BLINK 0x0F /* display on, cursor on, blink char */
|
||||
|
||||
/* move cursor/shift display */
|
||||
#define LCD_MOVE_CURSOR_LEFT 0x10 /* move cursor left (decrement) */
|
||||
#define LCD_MOVE_CURSOR_RIGHT 0x14 /* move cursor right (increment) */
|
||||
#define LCD_MOVE_DISP_LEFT 0x18 /* shift display left */
|
||||
#define LCD_MOVE_DISP_RIGHT 0x1C /* shift display right */
|
||||
|
||||
/* function set: set interface data length and number of display lines */
|
||||
#define LCD_FUNCTION_4BIT_1LINE 0x20 /* 4-bit interface, single line, 5x7 dots */
|
||||
#define LCD_FUNCTION_4BIT_2LINES 0x28 /* 4-bit interface, dual line, 5x7 dots */
|
||||
#define LCD_FUNCTION_8BIT_1LINE 0x30 /* 8-bit interface, single line, 5x7 dots */
|
||||
#define LCD_FUNCTION_8BIT_2LINES 0x38 /* 8-bit interface, dual line, 5x7 dots */
|
||||
|
||||
|
||||
#define LCD_MODE_DEFAULT ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @name Functions
|
||||
*/
|
||||
|
||||
|
||||
/**
|
||||
@brief Initialize display and select type of cursor
|
||||
@param dispAttr \b LCD_DISP_OFF display off\n
|
||||
\b LCD_DISP_ON display on, cursor off\n
|
||||
\b LCD_DISP_ON_CURSOR display on, cursor on\n
|
||||
\b LCD_DISP_ON_CURSOR_BLINK display on, cursor on flashing
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_init(uint8_t dispAttr);
|
||||
|
||||
|
||||
/**
|
||||
@brief Clear display and set cursor to home position
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_clrscr(void);
|
||||
|
||||
|
||||
/**
|
||||
@brief Set cursor to home position
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_home(void);
|
||||
|
||||
|
||||
/**
|
||||
@brief Set cursor to specified position
|
||||
|
||||
@param x horizontal position\n (0: left most position)
|
||||
@param y vertical position\n (0: first line)
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_gotoxy(uint8_t x, uint8_t y);
|
||||
|
||||
|
||||
/**
|
||||
@brief Set illumination pin
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_led(uint8_t onoff);
|
||||
|
||||
|
||||
/**
|
||||
@brief Display character at current cursor position
|
||||
@param c character to be displayed
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_putc(char c);
|
||||
|
||||
|
||||
/**
|
||||
@brief Display string without auto linefeed
|
||||
@param s string to be displayed
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_puts(const char *s);
|
||||
|
||||
|
||||
/**
|
||||
@brief Display string from program memory without auto linefeed
|
||||
@param s string from program memory be be displayed
|
||||
@return none
|
||||
@see lcd_puts_P
|
||||
*/
|
||||
extern void lcd_puts_p(const char *progmem_s);
|
||||
|
||||
|
||||
/**
|
||||
@brief Send LCD controller instruction command
|
||||
@param cmd instruction to send to LCD controller, see HD44780 data sheet
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_command(uint8_t cmd);
|
||||
|
||||
|
||||
/**
|
||||
@brief Send data byte to LCD controller
|
||||
|
||||
Similar to lcd_putc(), but without interpreting LF
|
||||
@param data byte to send to LCD controller, see HD44780 data sheet
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_data(uint8_t data);
|
||||
|
||||
/**
|
||||
@brief Clear CGRAM
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void lcd_clear_CGRAM (void);
|
||||
|
||||
/**
|
||||
@brief Create custom character in CGRAM
|
||||
@param charnum: Character position in CGRAM. You can define maximum 8 chars.
|
||||
@param values[]: Custom character descriptor pointer.
|
||||
@return 0 - The custom character successfully created
|
||||
@return 1 - If the charnum greater than 7. You can define maximum 8 chars.
|
||||
*/
|
||||
extern uint8_t lcd_create_custom_char (uint8_t charnum, const uint8_t * values);
|
||||
|
||||
/**
|
||||
@brief macros for automatically storing string constant in program memory
|
||||
*/
|
||||
#define lcd_puts_P(__s) lcd_puts_p(PSTR(__s))
|
||||
|
||||
/*@}*/
|
||||
#endif //LCD_H
|
||||
@ -0,0 +1,161 @@
|
||||
/*
|
||||
pcf8574 lib 0x02
|
||||
|
||||
copyright (c) Davide Gironi, 2012
|
||||
|
||||
Released under GPLv3.
|
||||
Please refer to LICENSE file for licensing information.
|
||||
*/
|
||||
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <util/delay.h>
|
||||
|
||||
#include "pcf8574.h"
|
||||
|
||||
//path to i2c fleury lib
|
||||
#include PCF8574_I2CFLEURYPATH
|
||||
|
||||
/*
|
||||
* initialize
|
||||
*/
|
||||
void pcf8574_init() {
|
||||
#if PCF8574_I2CINIT == 1
|
||||
//init i2c
|
||||
i2c_init();
|
||||
_delay_us(10);
|
||||
#endif
|
||||
|
||||
//reset the pin status
|
||||
uint8_t i = 0;
|
||||
for(i=0; i<PCF8574_MAXDEVICES; i++)
|
||||
pcf8574_pinstatus[i] = 0;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* get output status
|
||||
*/
|
||||
int8_t pcf8574_getoutput(uint8_t deviceid) {
|
||||
int8_t data = -1;
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
|
||||
data = pcf8574_pinstatus[deviceid];
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
/*
|
||||
* get output pin status
|
||||
*/
|
||||
int8_t pcf8574_getoutputpin(uint8_t deviceid, uint8_t pin) {
|
||||
int8_t data = -1;
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
|
||||
data = pcf8574_pinstatus[deviceid];
|
||||
data = (data >> pin) & 0b00000001;
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
/*
|
||||
* set output pins
|
||||
*/
|
||||
int8_t pcf8574_setoutput(uint8_t deviceid, uint8_t data) {
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
|
||||
pcf8574_pinstatus[deviceid] = data;
|
||||
i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
|
||||
i2c_write(data);
|
||||
i2c_stop();
|
||||
return 0;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* set output pins, replace actual status of a device from pinstart for pinlength with data
|
||||
*/
|
||||
int8_t pcf8574_setoutputpins(uint8_t deviceid, uint8_t pinstart, uint8_t pinlength, int8_t data) {
|
||||
//example:
|
||||
//actual data is 0b01101110
|
||||
//want to change ---
|
||||
//pinstart 4
|
||||
//data 101 (pinlength 3)
|
||||
//result 0b01110110
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pinstart - pinlength + 1 >= 0 && pinstart - pinlength + 1 >= 0 && pinstart < PCF8574_MAXPINS && pinstart > 0 && pinlength > 0)) {
|
||||
uint8_t b = 0;
|
||||
b = pcf8574_pinstatus[deviceid];
|
||||
uint8_t mask = ((1 << pinlength) - 1) << (pinstart - pinlength + 1);
|
||||
data <<= (pinstart - pinlength + 1);
|
||||
data &= mask;
|
||||
b &= ~(mask);
|
||||
b |= data;
|
||||
pcf8574_pinstatus[deviceid] = b;
|
||||
//update device
|
||||
i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
|
||||
i2c_write(b);
|
||||
i2c_stop();
|
||||
return 0;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* set output pin
|
||||
*/
|
||||
int8_t pcf8574_setoutputpin(uint8_t deviceid, uint8_t pin, uint8_t data) {
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
|
||||
uint8_t b = 0;
|
||||
b = pcf8574_pinstatus[deviceid];
|
||||
b = (data != 0) ? (b | (1 << pin)) : (b & ~(1 << pin));
|
||||
pcf8574_pinstatus[deviceid] = b;
|
||||
//update device
|
||||
i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_WRITE);
|
||||
i2c_write(b);
|
||||
i2c_stop();
|
||||
return 0;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* set output pin high
|
||||
*/
|
||||
int8_t pcf8574_setoutputpinhigh(uint8_t deviceid, uint8_t pin) {
|
||||
return pcf8574_setoutputpin(deviceid, pin, 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* set output pin low
|
||||
*/
|
||||
int8_t pcf8574_setoutputpinlow(uint8_t deviceid, uint8_t pin) {
|
||||
return pcf8574_setoutputpin(deviceid, pin, 0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* get input data
|
||||
*/
|
||||
int8_t pcf8574_getinput(uint8_t deviceid) {
|
||||
int8_t data = -1;
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES)) {
|
||||
i2c_start(((PCF8574_ADDRBASE+deviceid)<<1) | I2C_READ);
|
||||
data = ~i2c_readNak();
|
||||
i2c_stop();
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
/*
|
||||
* get input pin (up or low)
|
||||
*/
|
||||
int8_t pcf8574_getinputpin(uint8_t deviceid, uint8_t pin) {
|
||||
int8_t data = -1;
|
||||
if((deviceid >= 0 && deviceid < PCF8574_MAXDEVICES) && (pin >= 0 && pin < PCF8574_MAXPINS)) {
|
||||
data = pcf8574_getinput(deviceid);
|
||||
if(data != -1) {
|
||||
data = (data >> pin) & 0b00000001;
|
||||
}
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
@ -0,0 +1,39 @@
|
||||
/*
|
||||
pcf8574 lib 0x02
|
||||
|
||||
copyright (c) Davide Gironi, 2012
|
||||
|
||||
Released under GPLv3.
|
||||
Please refer to LICENSE file for licensing information.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef PCF8574_H_
|
||||
#define PCF8574_H_
|
||||
|
||||
#define PCF8574_ADDRBASE (0x20) //device base address
|
||||
|
||||
#define PCF8574_I2CINIT 1 //init i2c
|
||||
|
||||
#define PCF8574_MAXDEVICES 1 //max devices, depends on address (3 bit)
|
||||
#define PCF8574_MAXPINS 8 //max pin per device
|
||||
|
||||
//settings
|
||||
#define PCF8574_I2CFLEURYPATH "../i2chw/i2cmaster.h" //define the path to i2c fleury lib
|
||||
|
||||
//pin status
|
||||
volatile uint8_t pcf8574_pinstatus[PCF8574_MAXDEVICES];
|
||||
|
||||
|
||||
//functions
|
||||
void pcf8574_init();
|
||||
extern int8_t pcf8574_getoutput(uint8_t deviceid);
|
||||
extern int8_t pcf8574_getoutputpin(uint8_t deviceid, uint8_t pin);
|
||||
extern int8_t pcf8574_setoutput(uint8_t deviceid, uint8_t data);
|
||||
extern int8_t pcf8574_setoutputpins(uint8_t deviceid, uint8_t pinstart, uint8_t pinlength, int8_t data);
|
||||
extern int8_t pcf8574_setoutputpin(uint8_t deviceid, uint8_t pin, uint8_t data);
|
||||
extern int8_t pcf8574_setoutputpinhigh(uint8_t deviceid, uint8_t pin);
|
||||
extern int8_t pcf8574_setoutputpinlow(uint8_t deviceid, uint8_t pin);
|
||||
extern int8_t pcf8574_getinput(uint8_t deviceid);
|
||||
extern int8_t pcf8574_getinputpin(uint8_t deviceid, uint8_t pin);
|
||||
#endif
|
||||
Loading…
Reference in New Issue