ARM, RISC-V контроллеры

SPI AT91SAM7X как мне переключить чип селект ??? Привет, народ подскажите - как мне переключить чип селект с 0 на 1 или 2... чё то с 0 работает нормально - а на другие не становится... <c>. #define NCPS_PDR_BIT AT91C_PA13_SPI0_NPCS1 #define NCPS_ASR_BIT AT91C_PA13_SPI0_NPCS1 #define SPI0_MOSI AT91C_PA17_SPI0_MOSI #define NPCS_BSR_BIT 1 #define SPI_CSR_NUM 0 #define SPI_SCBR_MIN 2 /* PCS_0 for NPCS0, PCS_1 for NPCS1 ... */ #define PCS_0 AT91C_PA12_SPI0_NPCS0 #define PCS_1 AT91C_PA13_SPI0_NPCS1 #define PCS_2 AT91C_PA14_SPI0_NPCS2 #define PCS_3 AT91C_PA15_SPI0_NPCS3 /* TODO: ## */ #if (SPI_CSR_NUM == 0) #define SPI_MR_PCS PCS_0 #elif (SPI_CSR_NUM == 1) #define SPI_MR_PCS PCS_1 #elif (SPI_CSR_NUM == 2) #define SPI_MR_PCS PCS_2 #elif (SPI_CSR_NUM == 3) #define SPI_MR_PCS PCS_3 #else #error "SPI_CSR_NUM invalid" // not realy - when using an external address decoder... // but this code takes over the complete SPI-interace anyway #endif static BYTE xmit_spi(short dat) { AT91PS_SPI pSPI = AT91C_BASE_SPI0; while( !( pSPI->SPI_SR & AT91C_SPI_TDRE ) ); // transfer compl. wait pSPI->SPI_TDR = dat; while( !( pSPI->SPI_SR & AT91C_SPI_RDRF ) ); // wait for char return (BYTE)( pSPI->SPI_RDR ); // it's important to read RDR here! } static void if_spiSetSpeed(unsigned char speed) { unsigned long reg; AT91PS_SPI pSPI = AT91C_BASE_SPI0; if ( speed < SPI_SCBR_MIN ) speed = SPI_SCBR_MIN; if ( speed > 1 ) speed &= 0xFE; //reg = pSPI->SPI_CSR[SPI_CSR_NUM]; reg = pSPI->SPI_CSR[1]; reg = ( reg & ~(AT91C_SPI_SCBR) ) | ( (unsigned long)speed << 8); pSPI->SPI_CSR[1] = reg; } static void init_spi(int CSBit) { //BYTE NPCS_BSR_BIT = CSBit; BYTE i; AT91PS_SPI pSPI = AT91C_BASE_SPI0; AT91PS_PIO pPIOA = AT91C_BASE_PIOA; AT91PS_PMC pPMC = AT91C_BASE_PMC; // disable PIO from controlling MOSI, MISO, SCK (=hand over to SPI) // keep CS untouched - used as GPIO pin during init pPIOA->PIO_PDR = AT91C_PA16_SPI0_MISO |AT91C_PA17_SPI0_MOSI |AT91C_PA18_SPI0_SPCK; // | NCPS_PDR_BIT; // set pin-functions in PIO Controller pPIOA->PIO_ASR = AT91C_PA16_SPI0_MISO |AT91C_PA17_SPI0_MOSI |AT91C_PA18_SPI0_SPCK; /// not here: | NCPS_ASR_BIT; // not here: pPIOA->PIO_BSR = NPCS_BSR_BIT; // set chip-select as output high (unselect card) pPIOA->PIO_PER = NPCS_BSR_BIT; // enable PIO of CS-pin pPIOA->PIO_SODR = NPCS_BSR_BIT; // set pPIOA->PIO_OER = NPCS_BSR_BIT; // output // enable peripheral clock for SPI ( PID Bit 5 ) pPMC->PMC_PCER = ( (BYTE) 1 << AT91C_ID_SPI0 ); // n.b. IDs are just bit-numbers // SPI enable and reset pSPI->SPI_CR = AT91C_SPI_SPIEN | AT91C_SPI_SWRST; // SPI mode: master, fixed periph. sel., FDIV=0, fault detection disabled pSPI->SPI_MR = AT91C_SPI_MSTR | 1 | AT91C_SPI_MODFDIS; // set PCS for fixed select pSPI->SPI_MR &= 0xFFF0FFFF; // clear old PCS - redundant (AT91lib) pSPI->SPI_MR |= ( (SPI_MR_PCS<<16) & AT91C_SPI_PCS ); // set PCS // set chip-select-register // 8 bits per transfer, CPOL=0, ClockPhase=0, DLYBCT = 0 pSPI->SPI_CSR[1] = AT91C_SPI_CPOL | AT91C_SPI_BITS_16; // ok // slow during init if_spiSetSpeed(0xFE); // enable pSPI->SPI_CR = AT91C_SPI_SPIEN; /* enable automatic chip-select */ pPIOA->PIO_ODR = NPCS_BSR_BIT; // input pPIOA->PIO_CODR = NPCS_BSR_BIT; // clear // disable PIO from controlling the CS pin (=hand over to SPI) pPIOA->PIO_PDR = NCPS_PDR_BIT; // set pin-functions in PIO Controller pPIOA->PIO_ASR = NCPS_ASR_BIT; pPIOA->PIO_BSR = NPCS_BSR_BIT; } .</c>