diff options
| author | Matt Anderson <mda2376@gmail.com> | 2018-03-17 22:31:27 +0300 |
|---|---|---|
| committer | Karl Palsson <karlp@tweak.net.au> | 2018-07-04 01:30:24 +0300 |
| commit | 0d5e51a8a7b24c8bc93ca849eb670bc55b02e091 (patch) | |
| tree | 58eae8d9e0ba0bcf79081751ab20b023020a5bb9 | |
| parent | 68fce5a0ab650fcd6a9062127845b9d69042570e (diff) | |
STM32F0: Add RCC API for I2C1 clock source
* Providing API to set/clear RCC_CFGR3_I2C1SW on STM32F0, duplicated
from STM32F3 applies only to I2C1.
| -rw-r--r-- | include/libopencm3/stm32/f0/rcc.h | 3 | ||||
| -rw-r--r-- | lib/stm32/f0/rcc.c | 20 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/libopencm3/stm32/f0/rcc.h b/include/libopencm3/stm32/f0/rcc.h index 5872c7a2..ab066ea7 100644 --- a/include/libopencm3/stm32/f0/rcc.h +++ b/include/libopencm3/stm32/f0/rcc.h @@ -533,6 +533,9 @@ void rcc_set_ppre(uint32_t ppre); void rcc_set_hpre(uint32_t hpre); void rcc_set_prediv(uint32_t prediv); enum rcc_osc rcc_system_clock_source(void); +void rcc_set_i2c_clock_hsi(uint32_t i2c); +void rcc_set_i2c_clock_sysclk(uint32_t i2c); +uint32_t rcc_get_i2c_clocks(void); enum rcc_osc rcc_usb_clock_source(void); void rcc_clock_setup_in_hse_8mhz_out_48mhz(void); void rcc_clock_setup_in_hsi_out_48mhz(void); diff --git a/lib/stm32/f0/rcc.c b/lib/stm32/f0/rcc.c index fa85aeaf..d4b79e5d 100644 --- a/lib/stm32/f0/rcc.c +++ b/lib/stm32/f0/rcc.c @@ -39,6 +39,7 @@ #include <libopencm3/cm3/assert.h> #include <libopencm3/stm32/rcc.h> #include <libopencm3/stm32/flash.h> +#include <libopencm3/stm32/i2c.h> /* Set the default clock frequencies */ uint32_t rcc_ahb_frequency = 8000000; /* 8MHz after reset */ @@ -520,6 +521,25 @@ enum rcc_osc rcc_system_clock_source(void) cm3_assert_not_reached(); } +void rcc_set_i2c_clock_hsi(uint32_t i2c) +{ + if (i2c == I2C1) { + RCC_CFGR3 &= ~RCC_CFGR3_I2C1SW; + } +} + +void rcc_set_i2c_clock_sysclk(uint32_t i2c) +{ + if (i2c == I2C1) { + RCC_CFGR3 |= RCC_CFGR3_I2C1SW; + } +} + +uint32_t rcc_get_i2c_clocks(void) +{ + return RCC_CFGR3 & RCC_CFGR3_I2C1SW; +} + /*---------------------------------------------------------------------------*/ /** @brief RCC Get the USB Clock Source. * |