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cpu: sam3: 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 10a77b7775
commit 626289b5c7
3 changed files with 11 additions and 71 deletions
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3
cpu/sam3/Makefile.include
View File

@ -3,4 +3,7 @@ export CPU_ARCH = cortex-m3
# use hwtimer compatibility module
USEMODULE += hwtimer_compat
# include common SPI functions
USEMODULE += periph_common
include $(RIOTCPU)/Makefile.include.cortexm_common

9
cpu/sam3/include/periph_cpu.h
View File

@ -25,7 +25,14 @@
extern "C" {
#endif
/* nothing defined here so far... */
/**
* @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
}

70
cpu/sam3/periph/spi.c
View File

@ -335,76 +335,6 @@ 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 trans_ret, trans_bytes = 0;
char in_temp;
for (int i = 0; i < length; i++) {
if (out) {
trans_ret = spi_transfer_byte(dev, out[i], &in_temp);
}
else {
trans_ret = spi_transfer_byte(dev, 0, &in_temp);
}
if (trans_ret < 0) {
return -1;
}
if (in) {
in[i] = in_temp;
}
trans_bytes++;
}
return trans_bytes++;
}
int spi_transfer_reg(spi_t dev, uint8_t reg, char out, char *in)
{
int trans_ret;
trans_ret = spi_transfer_byte(dev, reg, in);
if (trans_ret < 0) {
return -1;
}
trans_ret = spi_transfer_byte(dev, out, in);
if (trans_ret < 0) {
return -1;
}
return 1;
}
int spi_transfer_regs(spi_t dev, uint8_t reg, char *out, char *in, unsigned int length)
{
int trans_ret;
trans_ret = spi_transfer_byte(dev, reg, in);
if (trans_ret < 0) {
return -1;
}
trans_ret = spi_transfer_bytes(dev, out, in, length);
if (trans_ret < 0) {
return -1;
}
return trans_ret;
}
void spi_transmission_begin(spi_t dev, char reset_val)
{
switch (dev) {