spi.h
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//-----------------------------------------------------------------------------
//AVR Mega168 SPI HAL
#define BIT0 0x01
#define BIT1 0x02
#define BIT2 0x04
#define BIT3 0x08
#define BIT4 0x10
#define BIT5 0x20
#define BIT6 0x40
#define BIT7 0x80
#define SPI0_SS_BIT BIT2
#define SPI0_SS_DDR DDRB
#define SPI0_SS_PORT PORTB
#define SPI0_SCLK_BIT BIT5
#define SPI0_SCLK_DDR DDRB
#define SPI0_SCLK_PORT PORTB
#define SPI0_MOSI_BIT BIT3
#define SPI0_MOSI_DDR DDRB
#define SPI0_MOSI_PORT PORTB
#define SPI0_MISO_BIT BIT4
#define SPI0_MISO_DDR DDRB
#define SPI0_MISO_PORT PORTB
#define SPI0_WaitForReceive()
#define SPI0_RxData() (SPDR)
#define SPI0_TxData(Data) (SPDR = Data)
#define SPI0_WaitForSend() while( (SPSR & 0x80)==0x00 )
#define SPI0_SendByte(Data) SPI0_TxData(Data);SPI0_WaitForSend()
#define SPI0_RecvBute() SPI0_RxData()
// PB4(MISO), PB3(MOSI), PB5(SCK), PB2(/SS) // CS=1, waiting for SPI start // SPI mode 0, 4MHz
#define SPI0_Init() DDRB |= SPI0_SS_BIT|SPI0_SCLK_BIT|SPI0_MOSI_BIT;\
PORTB |= SPI0_SS_BIT; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\
SPCR = 0x50
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//IInChip SPI HAL
#define IINCHIP_SpiInit SPI0_Init
#define IINCHIP_SpiSendData SPI0_SendByte
#define IINCHIP_SpiRecvData SPI0_RxData
#define IINCHIP_CS_BIT BIT2
#define IINCHIP_CS_DDR DDRB
#define IINCHIP_CS_PORT PORTB
#define IINCHIP_CSInit() (IINCHIP_CS_DDR |= IINCHIP_CS_BIT)
#define IINCHIP_CSon() (IINCHIP_CS_PORT |= IINCHIP_CS_BIT)
#define IINCHIP_CSoff() (IINCHIP_CS_PORT &= ~IINCHIP_CS_BIT)
//-----------------------------------------------------------------------------