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chg: ..oring..

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iceman1001 2018-02-21 08:30:47 +01:00
parent 4e915d2eb4
commit ab77b8a3d9
1 changed files with 17 additions and 10 deletions
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27
armsrc/flashmem.c
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@ -6,7 +6,7 @@
#define NCPS_PDR_BIT AT91C_PA10_NPCS2 // GPIO
#define NCPS_ASR_BIT 0 // SPI peripheral A
#define NPCS_BSR_BIT AT91C_PA10_NPCS2 // SPI peripheral B
#define SPI_CSR_NUM 0 // Chip Select register[] 0,1,2,3 (at91samv512 has 4)
#define SPI_CSR_NUM 2 // Chip Select register[] 0,1,2,3 (at91samv512 has 4)
/* PCS_0 for NPCS0, PCS_1 for NPCS1 ... */
#define PCS_0 ((0<<0)|(1<<1)|(1<<2)|(1<<3)) // 0xE - 1110
@ -93,7 +93,7 @@ void FlashSetup(void) {
AT91C_SPI_NCPHA | // NCPHA, Clock Phase data captured on leading edge, changes on following edge
(0 << 0); // CPOL, Clock Polarity inactive state is logic 0
*/
AT91C_BASE_SPI->SPI_CSR[SPI_CSR_NUM] = AT91C_SPI_CPOL | AT91C_SPI_BITS_8 | (6 << 8);
AT91C_BASE_SPI->SPI_CSR[SPI_CSR_NUM] = AT91C_SPI_NCPHA | AT91C_SPI_BITS_8 | (6 << 8);
// Enable SPI
AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
@ -104,13 +104,13 @@ void FlashSetup(void) {
/* enable automatic chip-select */
// reset PIO-registers of CS-pin to default
AT91C_BASE_PIOA->PIO_ODR = NCPS_PDR_BIT; // input
AT91C_BASE_PIOA->PIO_CODR = NCPS_PDR_BIT; // clear
AT91C_BASE_PIOA->PIO_ODR |= NCPS_PDR_BIT; // input
AT91C_BASE_PIOA->PIO_CODR |= NCPS_PDR_BIT; // clear
// disable PIO from controlling the CS pin (=hand over to SPI)
AT91C_BASE_PIOA->PIO_PDR = NCPS_PDR_BIT;
AT91C_BASE_PIOA->PIO_PDR |= NCPS_PDR_BIT;
// set pin-functions in PIO Controller (function NCPS for CS-pin)
AT91C_BASE_PIOA->PIO_ASR = NCPS_ASR_BIT;
AT91C_BASE_PIOA->PIO_BSR = NPCS_BSR_BIT;
AT91C_BASE_PIOA->PIO_ASR |= NCPS_ASR_BIT;
AT91C_BASE_PIOA->PIO_BSR |= NPCS_BSR_BIT;
}
void FlashStop(void) {
@ -139,11 +139,18 @@ uint16_t FlashSend(uint16_t data) {
uint16_t incoming = 0;
while ( !(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TXEMPTY)) {}; // wait for the transfer to complete
AT91C_BASE_SPI->SPI_TDR = data; // send the data
while ( !(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RDRF)) {}; // wait till transfer is complete
// wait until SPI is ready for transfer
while ( !(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TXEMPTY)) {};
// send the data
AT91C_BASE_SPI->SPI_TDR = data;
// wait recive transfer is complete
while ( !(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RDRF)) {};
// reading incoming data
incoming = ((AT91C_BASE_SPI->SPI_RDR) & 0xFFFF);
return incoming;
}
uint8_t Flash_ReadStat1(void) {