diff options
| author | Karl Palsson <karlp@etactica.com> | 2021-09-17 15:18:13 +0200 |
|---|---|---|
| committer | Karl Palsson <karlp@tweak.net.au> | 2022-01-20 19:01:51 +0100 |
| commit | 3da2028a769f03ea3ea4fa1b3d69d0bf19af3b1e (patch) | |
| tree | 4ff845a7dc0c8de6e5c88a5f146a69021ee17f94 /rcc | |
| parent | 8a73b0bb09eb96068ff02696eb1055a36349b6bf (diff) | |
platforms: stm32f3: make functional
Sufficient for blinking leds. Not much else tested yet.
Signed-off-by: Karl Palsson <karlp@etactica.com>
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)); |