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cpu: samd21: use periph_common SPI functions

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This commit is contained in:
Kaspar Schleiser 2015-08-13 15:20:39 +02:00
parent 626289b5c7
commit 0a859b91ee
3 changed files with 12 additions and 41 deletions
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3
cpu/samd21/Makefile.include
View File

@ -6,4 +6,7 @@ export CFLAGS += -DDONT_USE_CMSIS_INIT
# use the hwtimer compatibility layer
USEMODULE += hwtimer_compat
# use common periph functions
USEMODULE += periph_common
include $(RIOTCPU)/Makefile.include.cortexm_common

9
cpu/samd21/include/periph_cpu.h
View File

@ -88,6 +88,15 @@ typedef enum {
*/
int gpio_init_mux(gpio_t dev, gpio_mux_t mux);
/**
* @brief declare needed generic SPI functions
* @{
*/
#define PERIPH_SPI_NEEDS_TRANSFER_BYTES
#define PERIPH_SPI_NEEDS_TRANSFER_REG
#define PERIPH_SPI_NEEDS_TRANSFER_REGS
/** @} */
#ifdef __cplusplus
}
#endif

41
cpu/samd21/periph/spi.c
View File

@ -258,47 +258,6 @@ int spi_transfer_byte(spi_t dev, char out, char *in)
return 1;
}
int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)
{
int transfered = 0;
if (out != NULL) {
DEBUG("out*: %p out: %x length: %x\n", out, *out, length);
while (length--) {
int ret = spi_transfer_byte(dev, *(out)++, 0);
if (ret < 0) {
return ret;
}
transfered += ret;
}
}
if (in != NULL) {
while (length--) {
int ret = spi_transfer_byte(dev, 0, in++);
if (ret < 0) {
return ret;
}
transfered += ret;
}
DEBUG("in*: %p in: %x transfered: %x\n", in, *(in-transfered), transfered);
}
DEBUG("sent %x byte(s)\n", transfered);
return transfered;
}
int spi_transfer_reg(spi_t dev, uint8_t reg, char out, char *in)
{
spi_transfer_byte(dev, reg, NULL);
return spi_transfer_byte(dev, out, in);
}
int spi_transfer_regs(spi_t dev, uint8_t reg, char *out, char *in, unsigned int length)
{
spi_transfer_byte(dev, reg, NULL);
return spi_transfer_bytes(dev, out, in, length);
}
void spi_poweron(spi_t dev)
{
switch(dev) {