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canable-fw-normaldotcom
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Fix oscillator configuration. Lab tested with internal oscillator up to 1M.

This commit is contained in:
Ethan Zonca 2015-06-10 09:29:19 -04:00
parent f74e3c0c2a
commit aaaf33735c
1 changed files with 25 additions and 11 deletions
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36
Src/main.c
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@ -128,14 +128,27 @@ void SystemClock_Config(void)
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInit;
#ifdef EXTERNAL_OSCILLATOR
#ifdef INTERNAL_OSCILLATOR
// set up the oscillators
// use external oscillator (16 MHz), enable 3x PLL (48 MHz)
// use internal HSI48 (48 MHz), no PLL
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
RCC_OscInitStruct.HSI48State = RCC_HSE_ON;
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
#elif defined INTERNAL_OSCILLATOR
// set sysclk, hclk, and pclk1 source to HSI48 (48 MHz)
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
// set USB clock source to HSI48 (48 MHz)
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
#elif defined EXTERNAL_OSCILLATOR
// set up the oscillators
// use external oscillator (16 MHz), enable 3x PLL (48 MHz)
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
@ -144,23 +157,24 @@ void SystemClock_Config(void)
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL3;
RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
#else
#error "Please define whether to use an internal or external oscillator"
#endif
// set sysclk, hclk, and pclk1 source to PLL (48 MHz)
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
// set USB clock source to PLL (48 MHz)
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLLCLK;
#else
#error "Please define whether to use an internal or external oscillator"
#endif
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
__SYSCFG_CLK_ENABLE();
}