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58 lines
1.0 KiB
C
58 lines
1.0 KiB
C
/*
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* LCD_HD44780.c
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*
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* Created: 20.01.2018 12:51:11
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* Author: Ulrich
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*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include "lcd.h"
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#include "i2c.h"
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#include "modbus.h"
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volatile uint16_t holdingRegisters[4];
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void modbusGet(void) {
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if (modbusGetBusState() & (1<<ReceiveCompleted))
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{
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switch(rxbuffer[1]) {
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case fcReadHoldingRegisters:
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case fcPresetSingleRegister:
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case fcPresetMultipleRegisters:
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modbusExchangeRegisters(holdingRegisters,0,4);
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lcd_home();
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lcd_write("test %x", holdingRegisters[0]);
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break;
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default:
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modbusSendException(ecIllegalFunction);
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break;
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}
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}
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}
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int main(void)
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{
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i2c_init();
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lcd_init();
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lcd_clear();
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sei();
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modbusSetAddress(1);
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modbusInit();
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TCCR0B|=(1<<CS01); //prescaler 8
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TIMSK0|=(1<<TOIE0);
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while(1){
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modbusGet();
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}
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}
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ISR(TIMER0_OVF_vect) { //this ISR is called 9765.625 times per second
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modbusTickTimer();
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}
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