本帖最后由 dirty123 于 2024-4-26 00:10 编辑
本篇讲述AT-START-F405开发板FreeRTOS系统移植运行。由于官方已经做好了demo,这里主要讲下移植与系统运行测验。
一.FreeRTOS系统移植
开发板MCUAT32F405RCT7-7微控制器，ARM Cortex-M4核，96+6KB RAM，256KB Flash ，资源是足够FreeRTOS系统移植的。
1.打开官方SDK里FreeRTOS工程如下。路径：AT32F402_405_Firmware_Library_V2.0.7\utilities\at32f402_405_freertos_demo
图1:FreeRTOS系统工程
2.在at32f402_405_int.c里屏蔽SVC_Handler，PendSV_Handler，SysTick_Handler
图2:屏蔽函数
3.定义引用系统时钟。在FreeRTOSConfig.h里有系统时钟频率configCPU_CLOCK_HZ宏定义，随时间节拍提供系统心跳
4.在main函数创建系统任务，启动调度器。
- int main(void)
- {
- system_clock_config();
- nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
- /* init led2 and led3 */
- at32_led_init(LED2);
- at32_led_init(LED3);
- /* init usart1 */
- uart_print_init(115200);
- /* enter critical */
- taskENTER_CRITICAL();
- /* create led2 task */
- if(xTaskCreate((TaskFunction_t )led2_task_function,
- (const char* )"LED2_task",
- (uint16_t )512,
- (void* )NULL,
- (UBaseType_t )2,
- (TaskHandle_t* )&led2_handler) != pdPASS)
- {
- printf("LED2 task could not be created as there was insufficient heap memory remaining.\r\n");
- }
- else
- {
- printf("LED2 task was created successfully.\r\n");
- }
- /* create led3 task */
- if(xTaskCreate((TaskFunction_t )led3_task_function,
- (const char* )"LED3_task",
- (uint16_t )512,
- (void* )NULL,
- (UBaseType_t )2,
- (TaskHandle_t* )&led3_handler) != pdPASS)
- {
- printf("LED3 task could not be created as there was insufficient heap memory remaining.\r\n");
- }
- else
- {
- printf("LED3 task was created successfully.\r\n");
- }
- /* exit critical */
- taskEXIT_CRITICAL();
- /* start scheduler */
- vTaskStartScheduler();
- }
- /* led2 task function */
- void led2_task_function(void *pvParameters)
- {
- while(1)
- {
- at32_led_toggle(LED2);
- printf("LED2 led_toggle\r\n");
- vTaskDelay(1000);
- }
- }
- /* led3 task function */
- void led3_task_function(void *pvParameters)
- {
- while(1)
- {
- at32_led_toggle(LED3);
- printf("LED3 led_toggle\r\n");
- vTaskDelay(500);
- }
- }
二.编译烧录运行
编译烧录运行后，可看到系统跑起来了。LED灯交替闪烁。
图3:FreeRTOS运行日志
至此，AT-START-F405开发板成功运行FreeRTOS系统。
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