diff options
Diffstat (limited to 'hal/rcc.cpp')
-rw-r--r-- | hal/rcc.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/hal/rcc.cpp b/hal/rcc.cpp new file mode 100644 index 0000000..e3ae38d --- /dev/null +++ b/hal/rcc.cpp @@ -0,0 +1,26 @@ +#include "rcc.h" +#include "stm32.h" + +void rcc_init() { + // Set flash latency. + FLASH.ACR = 0x12; + + // Enable HSE. + RCC.CR |= 0x10000; + while(RCC.CR & 0x20000); + + // Configure and enable PLL. + RCC.CFGR = 0x1d0000; + RCC.CR |= 0x1000000; + while(RCC.CR & 0x2000000); + + // Switch to PLL. + RCC.CFGR |= 0x2; + while(!(RCC.CFGR & 0x8)); + + // Set APB1 prescaler to /2. + RCC.CFGR |= 0x400; + + // Set ADCCLK prescaler to /6. + RCC.CFGR |= 0x8000; +} |