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stm32f1: add SPI support

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Add basic SPI support and associated documentation.

v2: remove baud rate check, fix baud rate calculations
v3: finish transaction with BSY check, disable SPI when not in use

Signed-off-by: Grigori Goronzy <greg@chown.ath.cx>
This commit is contained in:
Grigori Goronzy
2018-07-02 23:17:28 +02:00
committed by KevinOConnor
parent b0ee323e2e
commit 5c7c8c984b
5 changed files with 122 additions and 2 deletions
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9
src/stm32f1/main.c
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@@ -14,6 +14,7 @@
#include "stm32f1xx_ll_iwdg.h"
#include "stm32f1xx_ll_gpio.h"
#include "stm32f1xx_ll_adc.h"
#include "stm32f1xx_ll_spi.h"
#include "sched.h" // sched_main
DECL_CONSTANT(MCU, "stm32f103");
@@ -108,6 +109,13 @@ void adc_config(void)
LL_ADC_REG_SetSequencerLength(ADC1, LL_ADC_REG_SEQ_SCAN_DISABLE);
}
void spi_config(void)
{
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_SPI2);
LL_SPI_SetNSSMode(SPI2, LL_SPI_NSS_SOFT);
LL_SPI_SetMode(SPI2, LL_SPI_MODE_MASTER);
}
void io_config(void)
{
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_AFIO);
@@ -131,6 +139,7 @@ main(void)
clock_config();
adc_config();
io_config();
spi_config();
sched_main();
return 0;
}