stmhal: Port of f4 hal commit c568a2b to updated f7 hal.

This commit is contained in:
Rami Ali 2016-12-06 10:56:06 +11:00 committed by Damien George
parent b9741cd8f8
commit e1c6ed634f
1 changed files with 6 additions and 1 deletions

View File

@ -901,7 +901,12 @@ uint32_t HAL_RCC_GetSysClockFreq(void)
if (__HAL_RCC_GET_PLL_OSCSOURCE() != RCC_PLLCFGR_PLLSRC_HSI)
{
/* HSE used as PLL clock source */
pllvco = ((HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));
//pllvco = ((HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));
// dpgeorge: Adjust the way the arithmetic is done so it retains
// precision for the case that pllm doesn't evenly divide HSE_VALUE.
// Must be sure not to overflow, so divide by 4 first. HSE_VALUE
// should be a multiple of 4 (being a multiple of 100 is enough).
pllvco = ((HSE_VALUE / 4) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN))) / pllm * 4;
}
else
{