en 129
fix LPC812 PWM
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Diff: targets/cmsis/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/system_stm32f1xx.c
- Revision:
- 0:9b334a45a8ff
- Child:
- 124:6a4a5b7d7324
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/system_stm32f1xx.c Thu Oct 01 15:25:22 2015 +0300
@@ -0,0 +1,603 @@
+/**
+ ******************************************************************************
+ * @file system_stm32f1xx.c
+ * @author MCD Application Team
+ * @version V4.0.0
+ * @date 16-December-2014
+ * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
+ *
+ * 1. This file provides two functions and one global variable to be called from
+ * user application:
+ * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier
+ * factors, AHB/APBx prescalers and Flash settings).
+ * This function is called at startup just after reset and
+ * before branch to main program. This call is made inside
+ * the "startup_stm32f1xx_xx.s" file.
+ *
+ * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
+ * by the user application to setup the SysTick
+ * timer or configure other parameters.
+ *
+ * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
+ * be called whenever the core clock is changed
+ * during program execution.
+ *
+ * 2. After each device reset the HSI (8 MHz) is used as system clock source.
+ * Then SystemInit() function is called, in "startup_stm32f1xx_xx.s" file, to
+ * configure the system clock before to branch to main program.
+ *
+ * 4. The default value of HSE crystal is set to 8 MHz (or 25 MHz, depending on
+ * the product used), refer to "HSE_VALUE".
+ * When HSE is used as system clock source, directly or through PLL, and you
+ * are using different crystal you have to adapt the HSE value to your own
+ * configuration.
+ *
+ * This file configures the system clock as follows:
+ *-----------------------------------------------------------------------------
+ * System clock source | 1- PLL_HSE_EXTC | 3- PLL_HSI
+ * | (external 8 MHz clock) | (internal 8 MHz)
+ * | 2- PLL_HSE_XTAL |
+ * | (external 8 MHz xtal) |
+ *-----------------------------------------------------------------------------
+ * SYSCLK(MHz) | 24 | 24
+ *-----------------------------------------------------------------------------
+ * AHBCLK (MHz) | 24 | 24
+ *-----------------------------------------------------------------------------
+ * APB1CLK (MHz) | 24 | 24
+ *-----------------------------------------------------------------------------
+ * APB2CLK (MHz) | 24 | 24
+ *-----------------------------------------------------------------------------
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/** @addtogroup CMSIS
+ * @{
+ */
+
+/** @addtogroup stm32f1xx_system
+ * @{
+ */
+
+/** @addtogroup STM32F1xx_System_Private_Includes
+ * @{
+ */
+
+#include "stm32f1xx.h"
+#include "hal_tick.h"
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_TypesDefinitions
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_Defines
+ * @{
+ */
+
+#if !defined (HSE_VALUE)
+ #define HSE_VALUE ((uint32_t)8000000) /*!< Default value of the External oscillator in Hz.
+ This value can be provided and adapted by the user application. */
+#endif /* HSE_VALUE */
+
+#if !defined (HSI_VALUE)
+ #define HSI_VALUE ((uint32_t)8000000) /*!< Default value of the Internal oscillator in Hz.
+ This value can be provided and adapted by the user application. */
+#endif /* HSI_VALUE */
+
+/*!< Uncomment the following line if you need to use external SRAM */
+#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG)
+/* #define DATA_IN_ExtSRAM */
+#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */
+
+/*!< Uncomment the following line if you need to relocate your vector Table in
+ Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field.
+ This value must be a multiple of 0x200. */
+
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_Macros
+ * @{
+ */
+
+/* Select the clock sources (other than HSI) to start with (0=OFF, 1=ON) */
+#define USE_PLL_HSE_EXTC (0) /* Use external clock */
+#define USE_PLL_HSE_XTAL (1) /* Use external xtal */
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_Variables
+ * @{
+ */
+
+/*******************************************************************************
+* Clock Definitions
+*******************************************************************************/
+#if defined(STM32F100xB) ||defined(STM32F100xE)
+ uint32_t SystemCoreClock = 24000000; /*!< System Clock Frequency (Core Clock) */
+#else /*!< HSI Selected as System Clock source */
+ uint32_t SystemCoreClock = 72000000; /*!< System Clock Frequency (Core Clock) */
+#endif
+
+const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_FunctionPrototypes
+ * @{
+ */
+
+#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG)
+#ifdef DATA_IN_ExtSRAM
+ static void SystemInit_ExtMemCtl(void);
+#endif /* DATA_IN_ExtSRAM */
+#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */
+
+#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass);
+#endif
+
+uint8_t SetSysClock_PLL_HSI(void);
+
+/**
+ * @}
+ */
+
+/** @addtogroup STM32F1xx_System_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Setup the microcontroller system
+ * Initialize the Embedded Flash Interface, the PLL and update the
+ * SystemCoreClock variable.
+ * @note This function should be used only after reset.
+ * @param None
+ * @retval None
+ */
+void SystemInit (void)
+{
+ /* Reset the RCC clock configuration to the default reset state(for debug purpose) */
+ /* Set HSION bit */
+ RCC->CR |= (uint32_t)0x00000001;
+
+ /* Reset SW, HPRE, PPRE1, PPRE2, ADCPRE and MCO bits */
+#if !defined(STM32F105xC) && !defined(STM32F107xC)
+ RCC->CFGR &= (uint32_t)0xF8FF0000;
+#else
+ RCC->CFGR &= (uint32_t)0xF0FF0000;
+#endif /* STM32F105xC */
+
+ /* Reset HSEON, CSSON and PLLON bits */
+ RCC->CR &= (uint32_t)0xFEF6FFFF;
+
+ /* Reset HSEBYP bit */
+ RCC->CR &= (uint32_t)0xFFFBFFFF;
+
+ /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE/OTGFSPRE bits */
+ RCC->CFGR &= (uint32_t)0xFF80FFFF;
+
+#if defined(STM32F105xC) || defined(STM32F107xC)
+ /* Reset PLL2ON and PLL3ON bits */
+ RCC->CR &= (uint32_t)0xEBFFFFFF;
+
+ /* Disable all interrupts and clear pending bits */
+ RCC->CIR = 0x00FF0000;
+
+ /* Reset CFGR2 register */
+ RCC->CFGR2 = 0x00000000;
+#elif defined(STM32F100xB) || defined(STM32F100xE)
+ /* Disable all interrupts and clear pending bits */
+ RCC->CIR = 0x009F0000;
+
+ /* Reset CFGR2 register */
+ RCC->CFGR2 = 0x00000000;
+#else
+ /* Disable all interrupts and clear pending bits */
+ RCC->CIR = 0x009F0000;
+#endif /* STM32F105xC */
+
+#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG)
+ #ifdef DATA_IN_ExtSRAM
+ SystemInit_ExtMemCtl();
+ #endif /* DATA_IN_ExtSRAM */
+#endif
+
+#ifdef VECT_TAB_SRAM
+ SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */
+#else
+ SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */
+#endif
+
+ /* Configure the Cube driver */
+ SystemCoreClock = 8000000; // At this stage the HSI is used as system clock
+ HAL_Init();
+
+ /* Configure the System clock source, PLL Multiplier and Divider factors,
+ AHB/APBx prescalers and Flash settings */
+ SetSysClock();
+
+ /* Reset the timer to avoid issues after the RAM initialization */
+ TIM_MST_RESET_ON;
+ TIM_MST_RESET_OFF;
+}
+
+/**
+ * @brief Update SystemCoreClock variable according to Clock Register Values.
+ * The SystemCoreClock variable contains the core clock (HCLK), it can
+ * be used by the user application to setup the SysTick timer or configure
+ * other parameters.
+ *
+ * @note Each time the core clock (HCLK) changes, this function must be called
+ * to update SystemCoreClock variable value. Otherwise, any configuration
+ * based on this variable will be incorrect.
+ *
+ * @note - The system frequency computed by this function is not the real
+ * frequency in the chip. It is calculated based on the predefined
+ * constant and the selected clock source:
+ *
+ * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
+ *
+ * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
+ *
+ * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
+ * or HSI_VALUE(*) multiplied by the PLL factors.
+ *
+ * (*) HSI_VALUE is a constant defined in stm32f1xx.h file (default value
+ * 8 MHz) but the real value may vary depending on the variations
+ * in voltage and temperature.
+ *
+ * (**) HSE_VALUE is a constant defined in stm32f1xx.h file (default value
+ * 8 MHz or 25 MHz, depending on the product used), user has to ensure
+ * that HSE_VALUE is same as the real frequency of the crystal used.
+ * Otherwise, this function may have wrong result.
+ *
+ * - The result of this function could be not correct when using fractional
+ * value for HSE crystal.
+ * @param None
+ * @retval None
+ */
+void SystemCoreClockUpdate (void)
+{
+ uint32_t tmp = 0, pllmull = 0, pllsource = 0;
+
+#if defined(STM32F105xC) || defined(STM32F107xC)
+ uint32_t prediv1source = 0, prediv1factor = 0, prediv2factor = 0, pll2mull = 0;
+#endif /* STM32F105xC */
+
+#if defined(STM32F100xB) || defined(STM32F100xE)
+ uint32_t prediv1factor = 0;
+#endif /* STM32F100xB or STM32F100xE */
+
+ /* Get SYSCLK source -------------------------------------------------------*/
+ tmp = RCC->CFGR & RCC_CFGR_SWS;
+
+ switch (tmp)
+ {
+ case 0x00: /* HSI used as system clock */
+ SystemCoreClock = HSI_VALUE;
+ break;
+ case 0x04: /* HSE used as system clock */
+ SystemCoreClock = HSE_VALUE;
+ break;
+ case 0x08: /* PLL used as system clock */
+
+ /* Get PLL clock source and multiplication factor ----------------------*/
+ pllmull = RCC->CFGR & RCC_CFGR_PLLMULL;
+ pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
+
+#if !defined(STM32F105xC) && !defined(STM32F107xC)
+ pllmull = ( pllmull >> 18) + 2;
+
+ if (pllsource == 0x00)
+ {
+ /* HSI oscillator clock divided by 2 selected as PLL clock entry */
+ SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
+ }
+ else
+ {
+ #if defined(STM32F100xB) || defined(STM32F100xE)
+ prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1;
+ /* HSE oscillator clock selected as PREDIV1 clock entry */
+ SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull;
+ #else
+ /* HSE selected as PLL clock entry */
+ if ((RCC->CFGR & RCC_CFGR_PLLXTPRE) != (uint32_t)RESET)
+ {/* HSE oscillator clock divided by 2 */
+ SystemCoreClock = (HSE_VALUE >> 1) * pllmull;
+ }
+ else
+ {
+ SystemCoreClock = HSE_VALUE * pllmull;
+ }
+ #endif
+ }
+#else
+ pllmull = pllmull >> 18;
+
+ if (pllmull != 0x0D)
+ {
+ pllmull += 2;
+ }
+ else
+ { /* PLL multiplication factor = PLL input clock * 6.5 */
+ pllmull = 13 / 2;
+ }
+
+ if (pllsource == 0x00)
+ {
+ /* HSI oscillator clock divided by 2 selected as PLL clock entry */
+ SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
+ }
+ else
+ {/* PREDIV1 selected as PLL clock entry */
+
+ /* Get PREDIV1 clock source and division factor */
+ prediv1source = RCC->CFGR2 & RCC_CFGR2_PREDIV1SRC;
+ prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1;
+
+ if (prediv1source == 0)
+ {
+ /* HSE oscillator clock selected as PREDIV1 clock entry */
+ SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull;
+ }
+ else
+ {/* PLL2 clock selected as PREDIV1 clock entry */
+
+ /* Get PREDIV2 division factor and PLL2 multiplication factor */
+ prediv2factor = ((RCC->CFGR2 & RCC_CFGR2_PREDIV2) >> 4) + 1;
+ pll2mull = ((RCC->CFGR2 & RCC_CFGR2_PLL2MUL) >> 8 ) + 2;
+ SystemCoreClock = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull;
+ }
+ }
+#endif /* STM32F105xC */
+ break;
+
+ default:
+ SystemCoreClock = HSI_VALUE;
+ break;
+ }
+
+ /* Compute HCLK clock frequency ----------------*/
+ /* Get HCLK prescaler */
+ tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
+ /* HCLK clock frequency */
+ SystemCoreClock >>= tmp;
+}
+
+#if defined(STM32F100xE) || defined(STM32F101xE) || defined(STM32F101xG) || defined(STM32F103xE) || defined(STM32F103xG)
+/**
+ * @brief Setup the external memory controller. Called in startup_stm32f1xx.s
+ * before jump to __main
+ * @param None
+ * @retval None
+ */
+#ifdef DATA_IN_ExtSRAM
+/**
+ * @brief Setup the external memory controller.
+ * Called in startup_stm32f1xx_xx.s/.c before jump to main.
+ * This function configures the external SRAM mounted on STM3210E-EVAL
+ * board (STM32 High density devices). This SRAM will be used as program
+ * data memory (including heap and stack).
+ * @param None
+ * @retval None
+ */
+void SystemInit_ExtMemCtl(void)
+{
+ __IO uint32_t tmpreg;
+ /*!< FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is
+ required, then adjust the Register Addresses */
+
+ /* Enable FSMC clock */
+ RCC->AHBENR = 0x00000114;
+
+ /* Delay after an RCC peripheral clock enabling */
+ tmpreg = READ_BIT(RCC->AHBENR, RCC_AHBENR_FSMCEN);
+
+ /* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */
+ RCC->APB2ENR = 0x000001E0;
+
+ /* Delay after an RCC peripheral clock enabling */
+ tmpreg = READ_BIT(RCC->APB2ENR, RCC_APB2ENR_IOPDEN);
+
+ (void)(tmpreg);
+
+/* --------------- SRAM Data lines, NOE and NWE configuration ---------------*/
+/*---------------- SRAM Address lines configuration -------------------------*/
+/*---------------- NOE and NWE configuration --------------------------------*/
+/*---------------- NE3 configuration ----------------------------------------*/
+/*---------------- NBL0, NBL1 configuration ---------------------------------*/
+
+ GPIOD->CRL = 0x44BB44BB;
+ GPIOD->CRH = 0xBBBBBBBB;
+
+ GPIOE->CRL = 0xB44444BB;
+ GPIOE->CRH = 0xBBBBBBBB;
+
+ GPIOF->CRL = 0x44BBBBBB;
+ GPIOF->CRH = 0xBBBB4444;
+
+ GPIOG->CRL = 0x44BBBBBB;
+ GPIOG->CRH = 0x444B4B44;
+
+/*---------------- FSMC Configuration ---------------------------------------*/
+/*---------------- Enable FSMC Bank1_SRAM Bank ------------------------------*/
+
+ FSMC_Bank1->BTCR[4] = 0x00001091;
+ FSMC_Bank1->BTCR[5] = 0x00110212;
+}
+#endif /* DATA_IN_ExtSRAM */
+#endif /* STM32F100xE || STM32F101xE || STM32F101xG || STM32F103xE || STM32F103xG */
+
+/**
+ * @brief Configures the System clock source, PLL Multiplier and Divider factors,
+ * AHB/APBx prescalers and Flash settings
+ * @note This function should be called only once the RCC clock configuration
+ * is reset to the default reset state (done in SystemInit() function).
+ * @param None
+ * @retval None
+ */
+void SetSysClock(void)
+{
+ /* 1- Try to start with HSE and external clock */
+#if USE_PLL_HSE_EXTC != 0
+ if (SetSysClock_PLL_HSE(1) == 0)
+#endif
+ {
+ /* 2- If fail try to start with HSE and external xtal */
+ #if USE_PLL_HSE_XTAL != 0
+ if (SetSysClock_PLL_HSE(0) == 0)
+ #endif
+ {
+ /* 3- If fail start with HSI clock */
+ if (SetSysClock_PLL_HSI() == 0)
+ {
+ while(1)
+ {
+ // [TODO] Put something here to tell the user that a problem occured...
+ }
+ }
+ }
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1); // 24 MHz
+}
+
+#if (USE_PLL_HSE_XTAL != 0) || (USE_PLL_HSE_EXTC != 0)
+/******************************************************************************/
+/* PLL (clocked by HSE) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ /* Enable HSE oscillator and activate PLL with HSE as source */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+ if (bypass == 0)
+ {
+ RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
+ }
+ else
+ {
+ RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
+ }
+ RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV2;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6; // 24 MHz (4 MHz * 6)
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+ {
+ return 0; // FAIL
+ }
+
+ /* 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; // 24 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 24 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 24 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 24 MHz
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
+ {
+ return 0; // FAIL
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1); // 8 MHz
+
+ return 1; // OK
+}
+#endif
+
+/******************************************************************************/
+/* PLL (clocked by HSI) used as System clock source */
+/******************************************************************************/
+uint8_t SetSysClock_PLL_HSI(void)
+{
+ RCC_ClkInitTypeDef RCC_ClkInitStruct;
+ RCC_OscInitTypeDef RCC_OscInitStruct;
+
+ /* Enable HSI oscillator and activate PLL with HSI as source */
+ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+ RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+ RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
+ RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
+ RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6; // 24 MHz (8 MHz/2 * 6)
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+ {
+ return 0; // FAIL
+ }
+
+ /* 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; // 24 MHz
+ RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 24 MHz
+ RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 24 MHz
+ RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 24 MHz
+ if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
+ {
+ return 0; // FAIL
+ }
+
+ /* Output clock on MCO1 pin(PA8) for debugging purpose */
+ //HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); // 8 MHz
+
+ return 1; // OK
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/