diff options
Diffstat (limited to 'rcc')
| -rw-r--r-- | rcc/rcc.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/rcc/rcc.cpp b/rcc/rcc.cpp index 5a7e29e..25ed29c 100644 --- a/rcc/rcc.cpp +++ b/rcc/rcc.cpp @@ -7,13 +7,13 @@ void rcc_init() { flash_init(); #if defined(STM32F1) || defined(STM32F3) - - // Enable HSE. + // Enable (assumed 8MHz!) HSE RCC->CR |= 0x10000; while(!(RCC->CR & 0x20000)); - - // Configure and enable PLL. - RCC->CFGR = 0x1d0000; + + // Configure and enable PLL from HSE. + auto pll_mul = 9; + RCC->CFGR = ((pll_mul-2)<<18) | (0x2 << 15); RCC->CR |= 0x1000000; while(!(RCC->CR & 0x2000000)); |