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STM32F0: Fix an error in clockconfig()

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This commit is contained in:
Gregory Nutt
2017-04-17 08:50:03 -06:00
parent 41f3f1ced7
commit 0d9395588b
1 changed files with 7 additions and 6 deletions
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arch/arm/src/stm32f0/stm32f0_clockconfig.c
+7 -6
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@@ -81,7 +81,7 @@ void stm32f0_clockconfig(void)
regval &= (uint32_t) (~RCC_CFGR_SW_MASK);
putreg32(regval, STM32F0_RCC_CFGR);
while ((getreg32(STM32F0_RCC_CFGR) & RCC_CFGR_SWS_MASK) != RCC_CFGR_SWS_HSI) ;
while ((getreg32(STM32F0_RCC_CFGR) & RCC_CFGR_SWS_MASK) != RCC_CFGR_SWS_HSI);
}
/* Disable the PLL */
@@ -89,12 +89,13 @@ void stm32f0_clockconfig(void)
regval = getreg32(STM32F0_RCC_CR);
regval &= (uint32_t)(~RCC_CR_PLLON);
putreg32(regval, STM32F0_RCC_CR);
while ((getreg32(STM32F0_RCC_CR) & RCC_CR_PLLRDY) != 0) ;
while ((getreg32(STM32F0_RCC_CR) & RCC_CR_PLLRDY) != 0);
/* Configure the PLL. Multiple x6 to get 48MHz */
regval = getreg32(STM32F0_RCC_CFGR);
regval &= (RCC_CFGR_PLLMUL_CLKx6 | ~RCC_CFGR_PLLMUL_MASK);
regval &= ~RCC_CFGR_PLLMUL_MASK;
regval |= RCC_CFGR_PLLMUL_CLKx6
putreg32(regval, STM32F0_RCC_CFGR);
/* Enable the PLL */
@@ -102,12 +103,12 @@ void stm32f0_clockconfig(void)
regval = getreg32(STM32F0_RCC_CR);
regval |= RCC_CR_PLLON;
putreg32(regval, STM32F0_RCC_CR);
while ((getreg32(STM32F0_RCC_CR) & RCC_CR_PLLRDY) == 0) ;
while ((getreg32(STM32F0_RCC_CR) & RCC_CR_PLLRDY) == 0);
/* Configure to use the PLL */
regval = getreg32(STM32F0_RCC_CFGR);
regval |= (uint32_t) (RCC_CFGR_SW_PLL);
regval |= (uint32_t)(RCC_CFGR_SW_PLL);
putreg32(regval, STM32F0_RCC_CFGR);
while ((getreg32(STM32F0_RCC_CFGR) & RCC_CFGR_SW_MASK) != RCC_CFGR_SW_PLL) ;
while ((getreg32(STM32F0_RCC_CFGR) & RCC_CFGR_SW_MASK) != RCC_CFGR_SW_PLL);
}