目标：
在STM32F429 Disco开发板上用FreeRTOS双线程点亮双闪led。
准备：
0.STM32F429i-DISCO
1. keil ARMMDK 5.13
2. STM32CubeMX 4.8
步骤：
1. 建立工程
keil - project - new project
2. 保存在硬盘上， 给工程起名字
3. 保存工程
同时弹出了器件选择界面， 选STM32F429ZITx
4. 上面界面点OK后出来了运行环境配置界面
展开CMSIS:RTOS and enable :Keil RTX :
Validation Output 区域显示了依赖组件， 点Resolve，然后OK
现在，需求的组件被添加进了工程（startup ， RTX config， CMSIS系统文件）
5. GPIO和时钟配置。
打开cube
选好器件
配置时钟
然后生成代码
我要的是时钟的初始化和gpio的初始化
/** System Clock Configuration*/void SystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct;RCC_ClkInitTypeDef RCC_ClkInitStruct;__PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 8;RCC_OscInitStruct.PLL.PLLN = 336;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 4;HAL_RCC_OscConfig(&RCC_OscInitStruct);RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);}
初始化168M系统时钟
/** Configure pins as * Analog * Input * Output* EVENT_OUT* EXTI*/void MX_GPIO_Init(void){GPIO_InitTypeDef GPIO_InitStruct;/* GPIO Ports Clock Enable */__GPIOH_CLK_ENABLE();__GPIOG_CLK_ENABLE();/*Configure GPIO pins : PG13 PG14 */GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_LOW;HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);}
初始化GPIO
把这两段代码加进main.c，并调用
6. 配置FreeRtos的时钟
打开RTX_Conf_CM.c文件， 文件下面有个configuration标签， 在这里配置168M时钟和上面匹配
8. 添加main函数
右键Source group 1， 选Add New Item to Group
Select User Code Template and click on “CMSIS-RTOS ‘main’function”. Click Add.
9.Edit the main program code. First add theCMSIS-RTOS RTX header. Right-click on a blank line at the beginning of the file main.c and from popup menu select Insert ‘#include files’. Include the header filecmsis_os.h.
10. Hal驱动
11. 写应用代码
添加LED.h, LED.H
/*------------------------------------------------------------------------ * File LED.h *----------------------------------------------------------------------*/ void Init_BlinkyThread ( void ); // Initialize thread
/*------------------------------------------------------------------------ * File LED.c *----------------------------------------------------------------------*/ #include "stm32f4xx.h" // Device header #include "cmsis_os.h" // RTOS:Keil RTX header #include "LED.h"#include "stm32f4xx_hal.h"// Prototype function void LEDG_blink(void const *argument);void LEDR_blink(void const *argument);// Define blinky thread osThreadDef (LEDG_blink, osPriorityNormal, 1, 0); osThreadDef (LEDR_blink, osPriorityNormal, 1, 0); void LEDG_blink(void const *argument) {for (;;) { HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);osDelay (500); // Delay 500 ms HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_RESET);osDelay (500); // Delay 500 ms}}void LEDR_blink(void const *argument) {for (;;) { HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_SET);osDelay (300); // Delay 500 ms HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_RESET);osDelay (300); // Delay 500 ms}}void Init_BlinkyThread (void) { osThreadCreate (osThread(LEDR_blink), NULL); // Create thread osThreadCreate (osThread(LEDG_blink), NULL); // Create thread }
LED.c
12. 在main.c里面调用
/** main: initialize and start the system*/int main (void) {SystemClock_Config();MX_GPIO_Init();osKernelInitialize (); // Initialize CMSIS-RTOS // create 'thread' functions that start executing, // example: tid_name = osThreadCreate (osThread(name), NULL); Init_BlinkyThread (); // Start Blinky thread //osThreadCreate (osThread(blink_LED), NULL); // Create thread osKernelStart (); // Start thread execution while (1); }
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