* Author: Clive Webster * * Implement an SPI interface in hardware */ #include "spi.h" #include <avr/io.h> // Define the implementations of the virtual classes static void __spiHWInit(SPI_ABSTRACT_BUS* spi, boolean master); static void __spiHWOff(SPI_ABSTRACT_BUS* spi); static void __spiHWSetClock(SPI_ABSTRACT_BUS* spi, SPI_CLOCK clock); static void __spiHWSetDataOrder(SPI_ABSTRACT_BUS* spi,SPI_DATA_ORDER order); static void __spiHWSetMode(SPI_ABSTRACT_BUS* spi,SPI_MODE mode); static uint8_t __spiHWSendByte(SPI_ABSTRACT_BUS* spi, uint8_t data); SPI_CLASS const PROGMEM c_hw_spi = MAKE_SPI_CLASS(&__spiHWInit, &__spiHWOff,&__spiHWSetClock,&__spiHWSetDataOrder, &__spiHWSetMode,&__spiHWSendByte, null, null,null); #if defined (__AVR_ATmega640__) || defined (__AVR_ATmega128__) || defined (__AVR_ATmega1280__) || defined (__AVR_ATmega2560__) || defined (__AVR_ATmega2561__) || defined (__AVR_ATmega128RFA1__) // Define the SPI pins for ATMega640/ATMega128/ATMega1280/ATMega2560/ATMega2561/ATMega128RFA1 #define SS_PORT PORTB #define SS_DDR DDRB #define SS_PIN PB0 #define SCK_PORT PORTB #define SCK_DDR DDRB #define SCK_PIN PB1 #define MOSI_PORT PORTB #define MOSI_DDR DDRB #define MOSI_PIN PB2
#include "../spisw.h"
//#include "pinChange.h"
#include "../timer.h"
// Define the implementations of the virtual classes
static void __spiSWInit(SPI_ABSTRACT_BUS* spi, boolean master);
static void __spiSWOff(SPI_ABSTRACT_BUS* spi);
static void __spiSWSetClock(SPI_ABSTRACT_BUS* spi, SPI_CLOCK clock);
static void __spiSWSetDataOrder(SPI_ABSTRACT_BUS* spi,SPI_DATA_ORDER order);
static void __spiSWSetMode(SPI_ABSTRACT_BUS* spi,SPI_MODE mode);
static uint8_t __spiSWSendByte(SPI_ABSTRACT_BUS* spi, uint8_t data);
static void readMany(const SPI_ABSTRACT_DEVICE* device,void* dta, size_t size);
static void writeMany(const SPI_ABSTRACT_DEVICE* device,const void* dta, size_t size);
static void select(const SPI_ABSTRACT_DEVICE* device,boolean selected);// Device selection change
const SPI_CLASS PROGMEM c_sw_spi = MAKE_SPI_CLASS(&__spiSWInit, &__spiSWOff,&__spiSWSetClock,&__spiSWSetDataOrder, &__spiSWSetMode,&__spiSWSendByte,&readMany,&writeMany,&select);
// Called under interrupts when the chip select pin has changed
//void slaveListener(const IOPin* io,boolean val, volatile void* data){
// if(val==FALSE){
// // Chip IS selected - so read in the next byte
//
// }
//}
//------------- Private methods - dont call directly -----
static void __spiSWInit(SPI_ABSTRACT_BUS* _spi, boolean master){
SPI_SW* spi = (SPI_SW*)_spi;