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| author | Perry Hung <iperry@alum.mit.edu> | 2010-08-04 04:29:02 -0400 |
|---|---|---|
| committer | Perry Hung <iperry@alum.mit.edu> | 2010-08-04 04:29:02 -0400 |
| commit | 57df5396fe83d0bb7aa55a9f4cd3a9eb2e4a6116 (patch) | |
| tree | 0c01fa11eac9b0b57f11b443e279cd14acbd87a4 /wirish | |
| parent | 2bb8c3fbe39ad12bc4669d499228961ad25e0ace (diff) | |
| download | librambutan-57df5396fe83d0bb7aa55a9f4cd3a9eb2e4a6116.tar.gz librambutan-57df5396fe83d0bb7aa55a9f4cd3a9eb2e4a6116.zip | |
New reset and clock control api
Diffstat (limited to 'wirish')
| -rw-r--r-- | wirish/wirish.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/wirish/wirish.c b/wirish/wirish.c index e166455..1938ec9 100644 --- a/wirish/wirish.c +++ b/wirish/wirish.c @@ -23,15 +23,22 @@ * ****************************************************************************/ /** - * @brief Maple board bring up + * @brief generic maple board bring up: + * + * By default, we bring up all maple boards running on the stm32 to 72mhz, + * clocked off the PLL, driven by the 8MHz external crystal. + * + * AHB and APB2 are clocked at 72MHz + * APB1 is clocked at 36MHz + * */ #include "wirish.h" -#include "rcc.h" #include "systick.h" #include "gpio.h" #include "nvic.h" #include "usb.h" +#include "rcc.h" #include "flash.h" void init(void) { @@ -39,7 +46,11 @@ void init(void) { flash_enable_prefetch(); flash_set_latency(FLASH_WAIT_STATE_2); - rcc_init(); + /* initialize clocks */ + rcc_clk_init(RCC_CLKSRC_PLL, RCC_PLLSRC_HSE, RCC_PLLMUL_9); + rcc_set_prescaler(RCC_PRESCALER_AHB, RCC_AHB_SYSCLK_DIV_1); + rcc_set_prescaler(RCC_PRESCALER_APB1, RCC_APB1_HCLK_DIV_2); + rcc_set_prescaler(RCC_PRESCALER_APB2, RCC_APB2_HCLK_DIV_1); nvic_init(); systick_init(); |