diff options
Diffstat (limited to 'src/led-test')
| -rw-r--r-- | src/led-test/Makefile | 49 | ||||
| -rw-r--r-- | src/led-test/main.c | 31 | ||||
| -rw-r--r-- | src/led-test/stm32f4xx_it.c | 189 | ||||
| -rw-r--r-- | src/led-test/stm32f4xx_it.h | 68 | ||||
| -rw-r--r-- | src/led-test/stm_init.c | 208 | ||||
| -rw-r--r-- | src/led-test/stm_init.h | 16 | ||||
| -rw-r--r-- | src/led-test/system_stm32f4xx.c | 270 |
7 files changed, 831 insertions, 0 deletions
diff --git a/src/led-test/Makefile b/src/led-test/Makefile new file mode 100644 index 0000000..97865ee --- /dev/null +++ b/src/led-test/Makefile @@ -0,0 +1,49 @@ +# put your *.o targets here, make should handle the rest! +SRCS = main.c stm_init.c system_stm32f4xx.c stm32f4xx_it.c + +# all the files will be generated with this name +PROJ_NAME=led-test + +TOPLEVEL=../.. +include $(TOPLEVEL)/common.mk + +OBJS = $(SRCS:.c=.o) + +################################################### + +.PHONY: lib proj + +all: lib proj + +lib: + $(MAKE) -C $(STD_PERIPH_LIB) STDPERIPH_SETTINGS="$(STDPERIPH_SETTINGS)" + +proj: $(PROJ_NAME).elf + +$(PROJ_NAME).elf: $(SRCS) + $(CC) $(CFLAGS) $^ -o $@ -L$(STD_PERIPH_LIB) -lstmf4 -L$(LDSCRIPT_INC) -T$(MCU_LINKSCRIPT) -g + $(OBJCOPY) -O ihex $(PROJ_NAME).elf $(PROJ_NAME).hex + $(OBJCOPY) -O binary $(PROJ_NAME).elf $(PROJ_NAME).bin + $(OBJDUMP) -St $(PROJ_NAME).elf >$(PROJ_NAME).lst + $(SIZE) $(PROJ_NAME).elf + +clean: + find ./ -name '*~' | xargs rm -f + rm -f *.o + rm -f $(PROJ_NAME).elf + rm -f $(PROJ_NAME).hex + rm -f $(PROJ_NAME).bin + rm -f $(PROJ_NAME).map + rm -f $(PROJ_NAME).lst + +really-clean: clean + $(MAKE) -C $(STD_PERIPH_LIB) clean + +debug: + $(GDB) -ex "target remote localhost:3333" \ + -ex "set remote hardware-breakpoint-limit 6" \ + -ex "set remote hardware-watchpoint-limit 4" $(PROJ_NAME).elf + +flash-target: + $(OPENOCD) -f $(OPENOCD_BOARD_DIR)/$(OPENOCD_PROC_FILE) \ + -c "program $(PROJ_NAME).elf verify reset" diff --git a/src/led-test/main.c b/src/led-test/main.c new file mode 100644 index 0000000..b5f15c9 --- /dev/null +++ b/src/led-test/main.c @@ -0,0 +1,31 @@ +/* + * Blink the four LEDs on the rev08/rev09 board in a pattern. + */ +#include "stm_init.h" + +#define DELAY() HAL_Delay(125) + +void toggle_led(uint32_t times, uint32_t led_pin) +{ + uint32_t i; + + for (i = 0; i < times; i++) { + HAL_GPIO_TogglePin(LED_PORT, led_pin); + DELAY(); + } +} + +int +main() +{ + stm_init(); + + while (1) + { + toggle_led(2, LED_BLUE); + toggle_led(2, LED_GREEN); + toggle_led(2, LED_YELLOW); + toggle_led(2, LED_RED); + } + +} diff --git a/src/led-test/stm32f4xx_it.c b/src/led-test/stm32f4xx_it.c new file mode 100644 index 0000000..e387408 --- /dev/null +++ b/src/led-test/stm32f4xx_it.c @@ -0,0 +1,189 @@ +/** + ****************************************************************************** + * @file GPIO/GPIO_IOToggle/Src/stm32f4xx_it.c + * @author MCD Application Team + * @version V1.0.1 + * @date 26-February-2014 + * @brief Main Interrupt Service Routines. + * This file provides template for all exceptions handler and + * peripherals interrupt service routine. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f4xx_it.h" +#include "stm_init.h" + +/** @addtogroup STM32F4xx_HAL_Examples + * @{ + */ + +/** @addtogroup GPIO_IOToggle + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ + +/* UART handler declared in "stm_init.h" file */ +//extern UART_HandleTypeDef huart2; + +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/******************************************************************************/ +/* Cortex-M4 Processor Exceptions Handlers */ +/******************************************************************************/ + +/** + * @brief This function handles NMI exception. + * @param None + * @retval None + */ +void NMI_Handler(void) +{ +} + +/** + * @brief This function handles Hard Fault exception. + * @param None + * @retval None + */ +void HardFault_Handler(void) +{ + /* Go to infinite loop when Hard Fault exception occurs */ + while (1) + { + } +} + +/** + * @brief This function handles Memory Manage exception. + * @param None + * @retval None + */ +void MemManage_Handler(void) +{ + /* Go to infinite loop when Memory Manage exception occurs */ + while (1) + { + } +} + +/** + * @brief This function handles Bus Fault exception. + * @param None + * @retval None + */ +void BusFault_Handler(void) +{ + /* Go to infinite loop when Bus Fault exception occurs */ + while (1) + { + } +} + +/** + * @brief This function handles Usage Fault exception. + * @param None + * @retval None + */ +void UsageFault_Handler(void) +{ + /* Go to infinite loop when Usage Fault exception occurs */ + while (1) + { + } +} + +/** + * @brief This function handles SVCall exception. + * @param None + * @retval None + */ +void SVC_Handler(void) +{ +} + +/** + * @brief This function handles Debug Monitor exception. + * @param None + * @retval None + */ +void DebugMon_Handler(void) +{ +} + +/** + * @brief This function handles PendSVC exception. + * @param None + * @retval None + */ +void PendSV_Handler(void) +{ +} + +/** + * @brief This function handles SysTick Handler. + * @param None + * @retval None + */ +void SysTick_Handler(void) +{ + HAL_IncTick(); +} + +/******************************************************************************/ +/* STM32F4xx Peripherals Interrupt Handlers */ +/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */ +/* available peripheral interrupt handler's name please refer to the startup */ +/* file (startup_stm32f4xx.s). */ +/******************************************************************************/ + +/** + * @brief This function handles PPP interrupt request. + * @param None + * @retval None + */ +/*void PPP_IRQHandler(void) +{ +}*/ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/src/led-test/stm32f4xx_it.h b/src/led-test/stm32f4xx_it.h new file mode 100644 index 0000000..6edba3c --- /dev/null +++ b/src/led-test/stm32f4xx_it.h @@ -0,0 +1,68 @@ +/** + ****************************************************************************** + * @file GPIO/GPIO_IOToggle/Inc/stm32f4xx_it.h + * @author MCD Application Team + * @version V1.0.1 + * @date 26-February-2014 + * @brief This file contains the headers of the interrupt handlers. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __STM32F4xx_IT_H +#define __STM32F4xx_IT_H + +#ifdef __cplusplus + extern "C" { +#endif + +/* Includes ------------------------------------------------------------------*/ +/* Exported types ------------------------------------------------------------*/ +/* Exported constants --------------------------------------------------------*/ +/* Exported macro ------------------------------------------------------------*/ +/* Exported functions ------------------------------------------------------- */ + +void NMI_Handler(void); +void HardFault_Handler(void); +void MemManage_Handler(void); +void BusFault_Handler(void); +void UsageFault_Handler(void); +void SVC_Handler(void); +void DebugMon_Handler(void); +void PendSV_Handler(void); +void SysTick_Handler(void); + +#ifdef __cplusplus +} +#endif + +#endif /* __STM32F4xx_IT_H */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/src/led-test/stm_init.c b/src/led-test/stm_init.c new file mode 100644 index 0000000..f2b1f78 --- /dev/null +++ b/src/led-test/stm_init.c @@ -0,0 +1,208 @@ +/** + ****************************************************************************** + * @file GPIO/GPIO_IOToggle/Src/main.c + * @author MCD Application Team + * @version V1.0.1 + * @date 26-February-2014 + * @brief This example describes how to configure and use GPIOs through + * the STM32F4xx HAL API. + ****************************************************************************** + * @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. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm_init.h" +//#include "stm32f4xx_hal.h" +//#include "stm32f4xx_hal_rcc.h" + +/** @addtogroup STM32F4xx_HAL_Examples + * @{ + */ + +/** @addtogroup GPIO_IOToggle + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ + +static GPIO_InitTypeDef GPIO_InitStruct; + +/* Private function prototypes -----------------------------------------------*/ +static void SystemClock_Config(void); +static void Error_Handler(void); +static void MX_GPIO_Init(void); +/* Private functions ---------------------------------------------------------*/ + +/** + * @brief Main program + * @param None + * @retval None + */ +void stm_init(void) +{ + /* Generic STM32 initialization. + + To proceed, 3 steps are required: */ + + /* STM32F4xx HAL library initialization: + - Configure the Flash prefetch, instruction and Data caches + - Configure the Systick to generate an interrupt each 1 msec + - Set NVIC Group Priority to 4 + - Global MSP (MCU Support Package) initialization + */ + HAL_Init(); + + /* Configure the system clock */ + SystemClock_Config(); + + /* System interrupt init*/ + /* Sets the priority grouping field */ + HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0); + HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); + + /* Initialize all configured peripherals */ + MX_GPIO_Init(); +} + + +/** System Clock Configuration + * + * HSI source, end result is 16 MHz SYSCLK + * +*/ +void SystemClock_Config(void) +{ + + RCC_OscInitTypeDef RCC_OscInitStruct; + + __PWR_CLK_ENABLE(); + + __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); + + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; + RCC_OscInitStruct.HSIState = RCC_HSI_ON; + RCC_OscInitStruct.HSICalibrationValue = 6; + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; + if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { + Error_Handler(); + } + + HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1); + + HAL_RCC_MCOConfig(RCC_MCO2, RCC_MCO2SOURCE_SYSCLK, RCC_MCODIV_1); +} + + +/** Configure pins as + + PB12 ------> GREEN LED + PB13 ------> YELLOW LED + PB14 ------> GREEN lED + PB15 ------> BLUE LED + PC9 ------> MCO_2 + PA8 ------> MCO_1 +*/ +void MX_GPIO_Init(void) +{ + /* GPIO Ports Clock Enable */ + __GPIOA_CLK_ENABLE(); + __GPIOB_CLK_ENABLE(); + __GPIOC_CLK_ENABLE(); + + /*Configure LED GPIO pins PB12==red, PB13==yellow, PB14==green, PB15==blue */ + GPIO_InitStruct.Pin = LED_RED | LED_YELLOW | LED_GREEN | LED_BLUE; + GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; + GPIO_InitStruct.Pull = GPIO_NOPULL; + GPIO_InitStruct.Speed = GPIO_SPEED_LOW; + HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct); + + /*Configure GPIO pin : PC9 (RCC_MCO_2) */ + GPIO_InitStruct.Pin = GPIO_PIN_9; + GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; + GPIO_InitStruct.Pull = GPIO_NOPULL; + GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; + GPIO_InitStruct.Alternate = GPIO_AF0_MCO; + HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); + + /*Configure GPIO pin : PA8 (RCC_MCO_1) */ + GPIO_InitStruct.Pin = GPIO_PIN_8; + GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; + GPIO_InitStruct.Pull = GPIO_NOPULL; + GPIO_InitStruct.Speed = GPIO_SPEED_LOW; + GPIO_InitStruct.Alternate = GPIO_AF0_MCO; + HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); +} + +/** + * @brief This function is executed in case of error occurrence. + * @param None + * @retval None + */ +static void Error_Handler(void) +{ + HAL_GPIO_WritePin(LED_PORT, LED_RED, GPIO_PIN_SET); + while(1) + { + } +} + +#ifdef USE_FULL_ASSERT + +/** + * @brief Reports the name of the source file and the source line number + * where the assert_param error has occurred. + * @param file: pointer to the source file name + * @param line: assert_param error line source number + * @retval None + */ +void assert_failed(uint8_t* file, uint32_t line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while (1) + { + } +} +#endif + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/src/led-test/stm_init.h b/src/led-test/stm_init.h new file mode 100644 index 0000000..e1cdfb8 --- /dev/null +++ b/src/led-test/stm_init.h @@ -0,0 +1,16 @@ +#ifndef __STM_INIT_H +#define __STM_INIT_H + +#include "stm32f4xx_hal.h" + +#define LED_PORT GPIOB +#define LED_RED GPIO_PIN_12 +#define LED_YELLOW GPIO_PIN_13 +#define LED_GREEN GPIO_PIN_14 +#define LED_BLUE GPIO_PIN_15 + +extern UART_HandleTypeDef huart1; +extern void stm_init(void); + + +#endif /* __STM_INIT_H */ diff --git a/src/led-test/system_stm32f4xx.c b/src/led-test/system_stm32f4xx.c new file mode 100644 index 0000000..3068a90 --- /dev/null +++ b/src/led-test/system_stm32f4xx.c @@ -0,0 +1,270 @@ +/** + ****************************************************************************** + * @file system_stm32f4xx.c + * @author MCD Application Team + * @version V1.0.1 + * @date 26-February-2014 + * @brief CMSIS Cortex-M4 Device Peripheral Access Layer System Source File. + * + * This file provides two functions and one global variable to be called from + * user application: + * - SystemInit(): This function is called at startup just after reset and + * before branch to main program. This call is made inside + * the "startup_stm32f4xx.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. + * + * + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 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 stm32f4xx_system + * @{ + */ + +/** @addtogroup STM32F4xx_System_Private_Includes + * @{ + */ + +#include "stm32f4xx_hal.h" + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Defines + * @{ + */ + +/************************* Miscellaneous Configuration ************************/ + +/*!< Uncomment the following line if you need to relocate your vector Table in + Internal SRAM. */ +/* #define VECT_TAB_SRAM */ +#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. + This value must be a multiple of 0x200. */ +/******************************************************************************/ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Variables + * @{ + */ + /* This variable is updated in three ways: + 1) by calling CMSIS function SystemCoreClockUpdate() + 2) by calling HAL API function HAL_RCC_GetHCLKFreq() + 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency + Note: If you use this function to configure the system clock; then there + is no need to call the 2 first functions listed above, since SystemCoreClock + variable is updated automatically. + */ + uint32_t SystemCoreClock = 16000000; + __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes + * @{ + */ + +/** + * @} + */ + +/** @addtogroup STM32F4xx_System_Private_Functions + * @{ + */ + +/** + * @brief Setup the microcontroller system + * Initialize the FPU setting, vector table location and External memory + * configuration. + * @param None + * @retval None + */ +void SystemInit(void) +{ + /* FPU settings ------------------------------------------------------------*/ + #if (__FPU_PRESENT == 1) && (__FPU_USED == 1) + SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */ + #endif + /* Reset the RCC clock configuration to the default reset state ------------*/ + /* Set HSION bit */ + RCC->CR |= (uint32_t)0x00000001; + + /* Reset CFGR register */ + RCC->CFGR = 0x00000000; + + /* Reset HSEON, CSSON and PLLON bits */ + RCC->CR &= (uint32_t)0xFEF6FFFF; + + /* Reset PLLCFGR register */ + RCC->PLLCFGR = 0x24003010; + + /* Reset HSEBYP bit */ + RCC->CR &= (uint32_t)0xFFFBFFFF; + + /* Disable all interrupts */ + RCC->CIR = 0x00000000; + + /* Configure the Vector Table location add offset address ------------------*/ +#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 +} + +/** + * @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/divided by the PLL factors. + * + * (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value + * 16 MHz) but the real value may vary depending on the variations + * in voltage and temperature. + * + * (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (its value + * depends on the application requirements), 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, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2; + + /* Get SYSCLK source -------------------------------------------------------*/ + tmp = RCC->CFGR & RCC_CFGR_SWS; + + switch (tmp) + { + case 0x00: /* HSI used as system clock source */ + SystemCoreClock = HSI_VALUE; + break; + case 0x04: /* HSE used as system clock source */ + SystemCoreClock = HSE_VALUE; + break; + case 0x08: /* PLL used as system clock source */ + + /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N + SYSCLK = PLL_VCO / PLL_P + */ + pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22; + pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM; + + if (pllsource != 0) + { + /* HSE used as PLL clock source */ + pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); + } + else + { + /* HSI used as PLL clock source */ + pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6); + } + + pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2; + SystemCoreClock = pllvco/pllp; + break; + default: + SystemCoreClock = HSI_VALUE; + break; + } + /* Compute HCLK frequency --------------------------------------------------*/ + /* Get HCLK prescaler */ + tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; + /* HCLK frequency */ + SystemCoreClock >>= tmp; +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |