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DISCO_L072CZ_LRWAN1: Clock configuration => 30MHz to 32MHz

pull/4256/head
arostm 2017-04-25 10:01:53 +02:00
parent 29d5818837
commit bffe629563
1 changed files with 15 additions and 11 deletions
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26
targets/TARGET_STM/TARGET_STM32L0/TARGET_DISCO_L072CZ_LRWAN1/device/system_stm32l0xx.c
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@ -127,8 +127,8 @@
*/
/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
#define USE_PLL_HSE_EXTC (1) /* Use external clock */
#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
#define USE_PLL_HSE_EXTC (0) /* Use external clock */
#define USE_PLL_HSE_XTAL (0) /* Use external xtal */
/**
* @}
@ -420,12 +420,6 @@ uint8_t SetSysClock_PLL_HSI(void)
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Enable HSI and HSI48 oscillators and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
@ -434,16 +428,26 @@ uint8_t SetSysClock_PLL_HSI(void)
!defined (STM32L011xx) && !defined (STM32L021xx)
RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; /* For USB and RNG clock */
#endif
// PLLCLK = (16 MHz * 4)/2 = 32 MHz
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
// PLLCLK = (16 MHz * 6)/3 = 32 MHz
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_6;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_3;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
return 0; // FAIL
}
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0 */
while (__HAL_PWR_GET_FLAG(PWR_FLAG_VOS) != RESET) {};
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz