/*!
* \brief Set the specified chip select to a given level.
*/
static int Stm32SpiChipSelect(uint_fast8_t cs, uint_fast8_t hi)
{
/* Fixme: Check for cs != 0 */
GpioPinConfigSet(SPIBUS_CS_PORT, SPIBUS_CS_PIN, GPIO_CFG_OUTPUT);
GpioPinSet(SPIBUS_CS_PORT, SPIBUS_CS_PIN, hi);
return 0;
}
/*!
* \brief Set the specified chip select to a given level.
*/
static GSPIREG *GpioSpi0ChipSelect(uint_fast8_t cs, uint_fast8_t hi)
{
GSPIREG *rc;
switch (cs) {
case 0:
/* If CS0 is undefined, we assume permanent selection. */
#if defined(SBBI0_CS0_BIT)
GpioPinSet(SBBI0_CS0_PORT, SBBI0_CS0_BIT, hi);
GpioPinConfigSet(SBBI0_CS0_PORT, SBBI0_CS0_BIT, GPIO_CFG_OUTPUT);
#endif
rc = &gspi_reg0;
break;
#if defined(SBBI0_CS1_BIT)
case 1:
GpioPinSet(SBBI0_CS1_PORT, SBBI0_CS1_BIT, hi);
GpioPinConfigSet(SBBI0_CS1_PORT, SBBI0_CS1_BIT, GPIO_CFG_OUTPUT);
rc = &gspi_reg1;
break;
#endif
#if defined(SBBI0_CS2_BIT)
case 2:
GpioPinSet(SBBI0_CS2_PORT, SBBI0_CS2_BIT, hi);
GpioPinConfigSet(SBBI0_CS2_PORT, SBBI0_CS2_BIT, GPIO_CFG_OUTPUT);
rc = &gspi_reg2;
break;
#endif
#if defined(SBBI0_CS3_BIT)
case 3:
GpioPinSet(SBBI0_CS3_PORT, SBBI0_CS3_BIT, hi);
GpioPinConfigSet(SBBI0_CS3_PORT, SBBI0_CS3_BIT, GPIO_CFG_OUTPUT);
rc = &gspi_reg3;
break;
#endif
default:
errno = EIO;
rc = NULL;
break;
}
return rc;
}
/* Idle clock is high and data is captured on the rising edge. */
static void SpiMode3Transfer(GSPIREG *gspi, CONST uint8_t *txbuf, uint8_t *rxbuf, int xlen)
{
#if defined(SBBI0_SCK_BIT)
uint_fast8_t mask;
while (xlen--) {
for (mask = 0x80; mask; mask >>= 1) {
NutMicroDelay(gspi->gspi_dly_rate);
GpioPinSetLow(SBBI0_SCK_PORT, SBBI0_SCK_BIT);
#if defined(SBBI0_MOSI_BIT)
if (txbuf) {
GpioPinSet(SBBI0_MOSI_PORT, SBBI0_MOSI_BIT, (*txbuf & mask) != 0);
}
#endif /* SBBI0_MOSI_BIT */
NutMicroDelay(gspi->gspi_dly_rate);
GpioPinSetHigh(SBBI0_SCK_PORT, SBBI0_SCK_BIT);
#if defined(SBBI0_MISO_BIT)
if (rxbuf) {
if (GpioPinGet(SBBI0_MISO_PORT, SBBI0_MISO_BIT)) {
*rxbuf |= mask;
}
else {
*rxbuf &= ~mask;
}
}
#endif /* SBBI0_MISO_BIT */
}
if (txbuf) {
txbuf++;
}
if (rxbuf) {
rxbuf++;
}
}
#endif /* SBBI0_SCK_BIT */
}
void BspDebugLedSet(uint8_t ledmsk)
{
GpioPinSet(DEBUG_LED_PORT,DEBUG_LED1,(ledmsk&(1<<0))?0:1);
GpioPinSet(DEBUG_LED_PORT,DEBUG_LED2,(ledmsk&(1<<1))?0:1);
}
