// ïåðåêëþ÷àåì PIOA íà SPI
AT91C_BASE_PIOA->PIO_PDR = AT91C_PA14_SPCK | AT91C_PA13_MOSI | AT91C_PA12_MISO;
AT91C_BASE_PIOA->PIO_ASR = AT91C_PA14_SPCK | AT91C_PA13_MOSI | AT91C_PA12_MISO; // SPI reset
AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
// ðåæèì ìàñòåðà
AT91C_BASE_SPI->SPI_MR |= AT91C_SPI_MSTR;
// çàõâàò ïî ôðîíòó
AT91C_BASE_SPI->SPI_CSR[ 0 ] |= AT91C_SPI_CPOL;
// êëîê ðàâåí MCK/8 ~6ÌÃö
AT91C_BASE_SPI->SPI_CSR[ 0 ] |= (8<<8);
// 8 áèò â ïîñûëêå
AT91C_BASE_SPI->SPI_CSR[ 0 ] |= (AT91C_SPI_BITS_16);
// èíèöèàëèçàöèÿ PDC äëÿ SPI
AT91C_BASE_PDC_SPI->PDC_TPR = (unsigned int)aucDataToCCD;
AT91C_BASE_PDC_SPI->PDC_PTCR = AT91C_PDC_TXTEN;
AT91C_BASE_PDC_SPI->PDC_TCR = 0;
AT91C_BASE_PDC_SPI->PDC_RPR = (unsigned int)aucDataFromCCD;
AT91C_BASE_PDC_SPI->PDC_PTCR = AT91C_PDC_RXTEN;
AT91C_BASE_PDC_SPI->PDC_RCR = 0;
// SPI enabled
AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
// а это сама отправка (предположим 12 байт так как обмен идет словами по 16 бит)
// èíèöèàëèçàöèÿ PDC äëÿ SPI
AT91C_BASE_PDC_SPI->PDC_TPR = (unsigned int)aucDataToCCD;
AT91C_BASE_PDC_SPI->PDC_PTCR = AT91C_PDC_TXTEN;
AT91C_BASE_PDC_SPI->PDC_TCR = 6;
AT91C_BASE_PDC_SPI->PDC_RPR = (unsigned int)aucDataFromCCD;
AT91C_BASE_PDC_SPI->PDC_PTCR = AT91C_PDC_RXTEN;
AT91C_BASE_PDC_SPI->PDC_RCR = 6;
