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使用keil5实现RA4M2按键控制LED的状态

web 2025/7/29 14:53:29

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我们上一个文章有说，实现RA4M2的流水灯实验，这次，我们来看看，怎么用按钮来控制LED的状态，我们先来看一下按钮的电路图。

这上面的两个图，第一个是按钮的电路图，第二个LED灯的电路图，我们对于LED的处理还是将其赋值为低电平，这样子的话，上电之后它就不亮了。

我们先来看LED部分的代码

static void Task_LedRunning(void *pvParameters)
{for (;;){// 控制三个LED循环点亮R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_04, BSP_IO_LEVEL_HIGH);// ... 其他LED控制代码vTaskDelay(pdMS_TO_TICKS(200)); // 延时200ms}
}

这样的话，我们就实现了流水灯部分的代码。

接下来，我们来看按键部分

static void Task_KeyRunning(void *pvParameters)
{bsp_io_level_t key_Status[2] = {BSP_IO_LEVEL_HIGH, BSP_IO_LEVEL_HIGH};uint16_t key_press_cnt[2] = {0U, 0U};for (;;){// 读取按键状态并消抖if (key_Status[0] == BSP_IO_LEVEL_LOW){if (key_press_cnt[0] >= 0U)vTaskSuspend(Task_Led_Handle); // 暂停LED任务// ... 其他按键处理逻辑}vTaskDelay(pdMS_TO_TICKS(10)); // 延时10ms}
}

当按键0按下去的时候，LED任务暂停，当按键1按下去的时候，LED任务开始。

主函数部分代码：

void hal_entry(void)
{// 创建LED和按键任务Task_Led_Handle = xTaskCreateStatic(Task_LedRunning, ...);Task_Key_Handle = xTaskCreateStatic(Task_KeyRunning, ...);if (NULL != Task_Led_Handle)vTaskStartScheduler(); // 启动调度器while (1) {} // 调度器启动成功后不会执行到这里
}

这样，我们就实现了这个功能。

完整代码如下：

#include "hal_data.h"
#include "FreeRTOS.h"
#include "task.h"FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER/* Stack for Idle task */
static StackType_t xIdleTaskStack[512];
static StaticTask_t xIdleTaskTcb;
/* Stack for Timer task */
static StackType_t xTiemrTaskStack[512];
static StaticTask_t xTimerTaskTcb;/* Staack for LED task */
static StackType_t xTaskLedStack[1024];
static StaticTask_t xTaskLedTcb;
static TaskHandle_t Task_Led_Handle = NULL;/* Staack for LED task */
static StackType_t xTaskKeyStack[1024];
static StaticTask_t xTaskKeyTcb;
static TaskHandle_t Task_Key_Handle = NULL;extern void vApplicationGetIdleTaskMemory(StaticTask_t ** ppxIdleTaskTCBBuffer,StackType_t ** ppxIdleTaskStackBuffer,uint32_t * pulIdleTaskStackSize);
extern void vApplicationGetTimerTaskMemory(StaticTask_t **ppxTimerTaskTCBBuffer,StackType_t **ppxTimerTaskStackBuffer,uint32_t *pulTimerTaskStackSize);static void Task_LedRunning(void *pvParameters);
static void Task_KeyRunning(void *pvParameters);static void Task_LedRunning(void *pvParameters)
{(void)pvParameters;for (;;){R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_04, BSP_IO_LEVEL_HIGH);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_05, BSP_IO_LEVEL_LOW);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_02, BSP_IO_LEVEL_LOW);/* Delay for 200ms */vTaskDelay(pdMS_TO_TICKS(200));R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_04, BSP_IO_LEVEL_LOW);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_05, BSP_IO_LEVEL_HIGH);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_02, BSP_IO_LEVEL_LOW);/* Delay for 200ms */vTaskDelay(pdMS_TO_TICKS(200));R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_04, BSP_IO_LEVEL_LOW);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_05, BSP_IO_LEVEL_LOW);R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_02, BSP_IO_LEVEL_HIGH);/* Delay for 200ms */vTaskDelay(pdMS_TO_TICKS(200));}
}static void Task_KeyRunning(void *pvParameters)
{(void)pvParameters;bsp_io_level_t key_Status[2] = {BSP_IO_LEVEL_HIGH, BSP_IO_LEVEL_HIGH};uint16_t key_press_cnt[2] = {0U, 0U};for (;;){if (FSP_SUCCESS == R_IOPORT_PinRead(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_05, &key_Status[0])){if (key_Status[0] == BSP_IO_LEVEL_LOW){/* Filter */if (key_press_cnt[0] >= 0U){/* Key SW0 press confirm *//* Suspend led task */vTaskSuspend(Task_Led_Handle);}else{key_press_cnt[0] ++;}}else{key_press_cnt[0] = 0U;}}if (FSP_SUCCESS == R_IOPORT_PinRead(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_06, &key_Status[1])){if (key_Status[1] == BSP_IO_LEVEL_LOW){/* Filter */if (key_press_cnt[1] >= 4U){/* Key SW1 press confirm *//* Resume led task */vTaskResume(Task_Led_Handle);}else{key_press_cnt[1] ++;}}else{key_press_cnt[1] = 0U;}}vTaskDelay(pdMS_TO_TICKS(10));		}
}/* Implement the Idle task memory static alocation */
void vApplicationGetIdleTaskMemory(StaticTask_t ** ppxIdleTaskTCBBuffer,StackType_t ** ppxIdleTaskStackBuffer,uint32_t * pulIdleTaskStackSize)
{*ppxIdleTaskTCBBuffer = &xIdleTaskTcb;*ppxIdleTaskStackBuffer = xIdleTaskStack;*pulIdleTaskStackSize = 1024;
}/* Implement the Timer task memory static alocation */
void vApplicationGetTimerTaskMemory(StaticTask_t **ppxTimerTaskTCBBuffer,StackType_t **ppxTimerTaskStackBuffer,uint32_t *pulTimerTaskStackSize)
{*ppxTimerTaskTCBBuffer = &xTimerTaskTcb;*ppxTimerTaskStackBuffer = xTiemrTaskStack;*pulTimerTaskStackSize = 2048;
}/*******************************************************************************************************************//*** main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function* is called by main() when no RTOS is used.**********************************************************************************************************************/
void hal_entry(void)
{/* Create static task */Task_Led_Handle = xTaskCreateStatic(Task_LedRunning,"Led",          /* Task name */1024,              /* Stack */NULL,              /* Task parameter */4,                 /* Priority */xTaskLedStack,&xTaskLedTcb);            /* Task handler */Task_Key_Handle = xTaskCreateStatic(Task_KeyRunning,"Key",          /* Task name */1024,              /* Stack */NULL,              /* Task parameter */3,                 /* Priority */xTaskKeyStack,&xTaskKeyTcb);            /* Task handler */if (NULL != Task_Led_Handle){vTaskStartScheduler();}while (1) {}#if BSP_TZ_SECURE_BUILD/* Enter non-secure code */R_BSP_NonSecureEnter();
#endif
}/*******************************************************************************************************************//*** This function is called at various points during the startup process.  This implementation uses the event that is* called right before main() to set up the pins.** @param[in]  event    Where at in the start up process the code is currently at**********************************************************************************************************************/
void R_BSP_WarmStart(bsp_warm_start_event_t event)
{if (BSP_WARM_START_RESET == event){
#if BSP_FEATURE_FLASH_LP_VERSION != 0/* Enable reading from data flash. */R_FACI_LP->DFLCTL = 1U;/* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and* C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif}if (BSP_WARM_START_POST_C == event){/* C runtime environment and system clocks are setup. *//* Configure pins. */R_IOPORT_Open (&g_ioport_ctrl, g_ioport.p_cfg);}
}#if BSP_TZ_SECURE_BUILDBSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ();/* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ()
{}
#endif

好了，今天的内容就到这里，我们明天再见。