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Added spi reset convenience function.

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This commit is contained in:
Piotr Esden-Tempski 2012-02-28 11:28:29 -08:00
parent 2b3f07ee08
commit c49f505df4
2 changed files with 19 additions and 0 deletions
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1
include/libopencm3/stm32/spi.h
View File

@ -297,6 +297,7 @@
/* --- Function prototypes ------------------------------------------------- */
void spi_reset(u32 spi_peripheral);
int spi_init_master(u32 spi, u32 br, u32 cpol, u32 cpha, u32 dff, u32 lsbfirst);
void spi_enable(u32 spi);
void spi_disable(u32 spi);

18
lib/stm32/spi.c
View File

@ -32,6 +32,24 @@
* reg16 = spi_read(SPI1); // 16-bit read
*/
void spi_reset(u32 spi_peripheral)
{
switch (spi_peripheral) {
case SPI1:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_SPI1RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_SPI1RST);
break;
case SPI2:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB2RSTR_SPI2RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB2RSTR_SPI2RST);
break;
case SPI3:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB2RSTR_SPI3RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB2RSTR_SPI3RST);
break;
}
}
int spi_init_master(u32 spi, u32 br, u32 cpol, u32 cpha, u32 dff, u32 lsbfirst)
{
u32 reg32 = 0;