cpu/stm32f0: removed leftovers from slave mode

dev/timer
Hauke Petersen 9 years ago committed by Hauke Petersen
parent d1118c0647
commit a29b9a08e4

@ -29,33 +29,12 @@
/* guard file in case no SPI device is defined */
#if SPI_NUMOF
/**
* @brief unified interrupt handler to be shared between SPI devices
*
* @param[in] spi Pointer to the devices base register
* @param[in] dev The device that triggered the interrupt
*/
static inline void irq_handler(SPI_TypeDef *spi, spi_t dev);
/**
* @brief structure that defines the state for an SPI device
*/
typedef struct {
char (*cb)(char data);
} spi_state_t;
/**
* @brief array with one field for each possible SPI device
*/
static spi_state_t spi_config[SPI_NUMOF];
int spi_init_master(spi_t dev, spi_conf_t conf, spi_speed_t speed)
{
SPI_TypeDef *spi = 0;
GPIO_TypeDef *port = 0;
SPI_TypeDef *spi;
GPIO_TypeDef *port;
int pin[3]; /* 3 pins: sck, miso, mosi */
int af;
int af = 0;
/* power on the SPI device */
spi_poweron(dev);
@ -83,6 +62,8 @@ int spi_init_master(spi_t dev, spi_conf_t conf, spi_speed_t speed)
SPI_0_PORT_CLKEN();
break;
#endif
default:
return -1;
}
/* configure pins for their correct alternate function */
@ -154,6 +135,8 @@ int spi_transfer_byte(spi_t dev, char out, char *in)
spi = SPI_1_DEV;
break;
#endif
default:
return 0;
}
/* wait for an eventually previous byte to be readily transferred */
@ -175,20 +158,21 @@ int spi_transfer_byte(spi_t dev, char out, char *in)
int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)
{
char res;
int count = 0;
for (int i = 0; i < length; i++) {
if (out) {
spi_transfer_byte(dev, out[i], &res);
count += spi_transfer_byte(dev, out[i], &res);
}
else {
spi_transfer_byte(dev, 0, &res);
count += spi_transfer_byte(dev, 0, &res);
}
if (in) {
in[i] = res;
}
}
return length;
return count;
}
int spi_transfer_reg(spi_t dev, uint8_t reg, char out, char *in)
@ -242,41 +226,4 @@ void spi_poweroff(spi_t dev)
}
}
static inline void irq_handler(SPI_TypeDef *spi, spi_t dev)
{
char data;
/* call owner when new byte was receive (asserts SPI is in slave mode) */
if (spi->SR & SPI_SR_RXNE) {
/* read received byte from data register */
data = *((volatile uint8_t *)(&spi->DR));
/* call callback for receiving the answer of the received byte */
//data = spi_config[dev].cb(data);
/* set answer byte to be transferred next */
*((volatile uint8_t *)(&spi->DR)) = (uint8_t)data;
}
if (sched_context_switch_request) {
thread_yield();
}
}
#if SPI_0_EN
__attribute__((naked)) void SPI_0_ISR(void)
{
ISR_ENTER();
irq_handler(SPI_0_DEV, SPI_0);
ISR_EXIT();
}
#endif
#if SPI_1_EN
__attribute__((naked)) void SPI_1_ISR(void)
{
ISR_ENTER();
irq_handler(SPI_1_DEV, SPI_1);
ISR_EXIT();
}
#endif
#endif /* SPI_NUMOF */

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