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| author | Kevin O'Connor <kevin@koconnor.net> | 2024-09-22 21:18:34 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2024-09-22 21:18:34 -0400 |
| commit | 8b7cc439529d727944589b751bd3a00305976bd0 (patch) | |
| tree | 7cefc1c80b1a7faf74f0dd01f37a0c0b86460ba7 | |
| parent | 9426485bb6c3855b117e05b1927e0b7c1937e0a9 (diff) | |
| download | kutter-8b7cc439529d727944589b751bd3a00305976bd0.tar.gz kutter-8b7cc439529d727944589b751bd3a00305976bd0.tar.xz kutter-8b7cc439529d727944589b751bd3a00305976bd0.zip | |
stm32: Reduce peripheral clock speed on stm32g4 chips
A 170mhz (or 150mhz) peripheral clock is too fast for some peripherals.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
| -rw-r--r-- | src/stm32/stm32g4.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/stm32/stm32g4.c b/src/stm32/stm32g4.c index 5255cb19..6d6d1c0d 100644 --- a/src/stm32/stm32g4.c +++ b/src/stm32/stm32g4.c @@ -12,7 +12,7 @@ #include "internal.h" // enable_pclock #include "sched.h" // sched_main -#define FREQ_PERIPH_DIV 1 +#define FREQ_PERIPH_DIV 2 #define FREQ_PERIPH (CONFIG_CLOCK_FREQ / FREQ_PERIPH_DIV) // Map a peripheral address to its enable bits @@ -142,7 +142,7 @@ clock_setup(void) RCC->PLLCFGR |= RCC_PLLCFGR_PLLREN; // Switch system clock to PLL - RCC->CFGR = RCC_CFGR_HPRE_DIV1 | RCC_CFGR_PPRE1_DIV1 | RCC_CFGR_PPRE2_DIV1 + RCC->CFGR = RCC_CFGR_HPRE_DIV1 | RCC_CFGR_PPRE1_DIV2 | RCC_CFGR_PPRE2_DIV2 | RCC_CFGR_SW_PLL; while ((RCC->CFGR & RCC_CFGR_SWS_Msk) != RCC_CFGR_SWS_PLL) ; |