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Updated SPI code driver.

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This commit is contained in:
maxxir_w
2019-03-25 08:36:17 +04:00
parent d0282a866d
commit f7a282051b
6 changed files with 88 additions and 28 deletions
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35
12_m644p_WIZNET_HTTPServer_SDCARD_pages/spi.c
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@@ -1,22 +1,36 @@
#include <avr/io.h>
#include "spi.h"
#include "globals.h"
/*
* Initialize SPI bus.
*/
//~ // From working SPI ENC28J60 driver
//~ #define ENC28J60_CONTROL_PORT PORTB
//~ #define ENC28J60_CONTROL_DDR DDRB
//~
//~ #define ENC28J60_CONTROL_CS PORTB6
//~ #define ENC28J60_CONTROL_SO PORTB3
//~ #define ENC28J60_CONTROL_SI PORTB2
//~ #define ENC28J60_CONTROL_SCK PORTB1
//~ #define ENC28J60_CONTROL_SS PORTB0
//~
//~ // set CS to 0 = active
//~ #define CSACTIVE ENC28J60_CONTROL_PORT&=~(1<<ENC28J60_CONTROL_CS)
//~ // set CS to 1 = passive
//~ #define CSPASSIVE ENC28J60_CONTROL_PORT|=(1<<ENC28J60_CONTROL_CS)
//
//~ #define waitspi() while(!(SPSR&(1<<SPIF)))
void
spi_init(void)
{
// CS PIN for WIZNET ETHERNET
// CS PIN for FLASH
DDRB |= _BV(WIZNET_CS); // CS to OUT && Disable
SPI_WIZNET_DISABLE();
// CS PIN for SDCARD
DDRB |= _BV(SD_CS); // CS to OUT && Disable
SPI_SD_DISABLE();
/* Initalize ports for communication with SPI units. */
/* CSN=SS and must be output when master! */
DDRB |= _BV(MOSI) | _BV(SCK) | _BV(CSN);
@@ -24,8 +38,13 @@ spi_init(void)
/* Enables SPI, selects "master", clock rate FCK / 4 - 4Mhz, and SPI mode 0 */
SPCR = _BV(SPE) | _BV(MSTR);
SPSR = 0x0;
//SPSR = _BV(SPI2X); //FCK / 2 - 8Mhz
#if defined(SPI_8_MHZ)
SPSR = _BV(SPI2X); //FCK / 2 - 8Mhz
#elif defined (SPI_4_MHZ)
SPSR = 0x0; //FCK / 4 - 4Mhz
#else
SPSR = 0x0; //FCK / 4 - 4Mhz
#endif
}