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Merged
merged 1 commit into from
Jan 10, 2020
Merged

stm32cube: stm32g4xx: wrong clock setup #34

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8 changes: 7 additions & 1 deletion stm32cube/stm32g4xx/README
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Original file line number Diff line number Diff line change
Expand Up @@ -35,4 +35,10 @@ License Link:
https://opensource.org/licenses/BSD-3-Clause

Patch List:
none

*stm32g4xx: wrong clock setup
In case the actual value is AHB prescaler 1, it must be set,
after setting the AHB prescaler to 2.
Impacted files:
drivers/src/stm32g4xx_ll_utils.c
ST Bug tracker ID: 78880
4 changes: 2 additions & 2 deletions stm32cube/stm32g4xx/drivers/src/stm32g4xx_ll_utils.c
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Expand Up @@ -325,7 +325,7 @@ ErrorStatus LL_PLL_ConfigSystemClock_HSI(LL_UTILS_PLLInitTypeDef *UTILS_PLLInitS
status = UTILS_EnablePLLAndSwitchSystem(pllfreq, UTILS_ClkInitStruct);

/* Apply definitive AHB prescaler value if necessary */
if((status == SUCCESS) && (hpre != 0U))
if((status == SUCCESS) && (hpre == LL_RCC_SYSCLK_DIV_1))
{
UTILS_ClkInitStruct->AHBCLKDivider = LL_RCC_SYSCLK_DIV_1;
LL_RCC_SetAHBPrescaler(UTILS_ClkInitStruct->AHBCLKDivider);
Expand Down Expand Up @@ -416,7 +416,7 @@ ErrorStatus LL_PLL_ConfigSystemClock_HSE(uint32_t HSEFrequency, uint32_t HSEBypa
status = UTILS_EnablePLLAndSwitchSystem(pllfreq, UTILS_ClkInitStruct);

/* Apply definitive AHB prescaler value if necessary */
if((status == SUCCESS) && (hpre != 0U))
if((status == SUCCESS) && (hpre == LL_RCC_SYSCLK_DIV_1))
{
UTILS_ClkInitStruct->AHBCLKDivider = LL_RCC_SYSCLK_DIV_1;
LL_RCC_SetAHBPrescaler(UTILS_ClkInitStruct->AHBCLKDivider);
Expand Down