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Implement clock_setup() in fancyblink, STM32 should now run at 72 MHz.

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This commit is contained in:
Uwe Hermann 2009-07-22 03:27:01 +02:00
parent 9fd3064cb2
commit fd1e0290cd
1 changed files with 24 additions and 0 deletions
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24
examples/fancyblink/fancyblink.c
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@ -19,10 +19,34 @@
#include <libopenstm32.h> #include <libopenstm32.h>
void clock_setup(void)
{
/* Select HSI as SYSCLK source. */
rcc_set_sysclk_source(SW_SYSCLKSEL_HSICLK);
/* Set the PLL multiplication factor to 9. */
rcc_set_pll_multiplication_factor(PLLMUL_PLL_CLK_MUL9);
/* Select HSI/2 as PLL source. */
rcc_set_pll_source(PLLSRC_HSI_CLK_DIV2);
rcc_set_pllxtpre(PLLXTPRE_HSE_CLK_DIV2);
/* Enable PLL oscillator and wait for it to stabilize. */
rcc_osc_on(PLL);
rcc_wait_for_osc_ready(PLL);
/* Select PLL as SYSCLK source. */
rcc_set_sysclk_source(SW_SYSCLKSEL_PLLCLK);
}
int main(void) int main(void)
{ {
int i; int i;
/* Set STM32 to 72 MHz. */
clock_setup();
/* Enable GPIOC clock. */ /* Enable GPIOC clock. */
rcc_enable_peripheral_clock(&RCC_APB2ENR, IOPCEN); rcc_enable_peripheral_clock(&RCC_APB2ENR, IOPCEN);