mhu/stm32f4-sdio
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fixed clock switch

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This commit is contained in:
Mario Hüttel 2016-09-27 17:41:53 +02:00
parent 9bce46516a
commit 1844e46167
1 changed files with 5 additions and 6 deletions
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11
FATFS/shimatta_sdio_driver/shimatta_sdio-driver.c
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@ -214,12 +214,11 @@ void initModuleHw(){
} }
void switchPrescaler(uint8_t clkdiv) { void switchPrescaler(uint8_t clkdiv) {
SDIO->POWER = 0; uint32_t reg;
__DSB(); reg = SDIO->CLKCR;
SDIO->CLKCR &= ~SDIO_CLKCR_CLKDIV; // Clear prescaler reg &= ~SDIO_CLKCR_CLKDIV; // Clear prescaler
SDIO->CLKCR |= (SDIO_CLKCR_CLKDIV & clkdiv); // Set bits reg |= (SDIO_CLKCR_CLKDIV & clkdiv); // Set bits
__DSB(); SDIO->CLKCR = reg;
SDIO->POWER = SDIO_POWER_PWRCTRL_0 | SDIO_POWER_PWRCTRL_1;
} }