学习一款芯片，首先从点亮一颗LED开始，本程序基于RIBEE_02电路开发板，点亮一颗LED灯，驱动管脚为PD0。扩展实训中增加蓝灯闪烁代码。
1.上芯片管脚图
2.配置晶振，启用内部晶振，失能外部晶振。
3.配置晶振，倍频与分频，外设基础时钟配置为64MHZ。
3.配置GPIO PD0管脚
4.直接上程序代码：
#include "main.h"
void SystemClock_Config(void);
void GPIO_Init(void);
int main(void)
{
HAL_Init(); //HAL库初始化
SystemClock_Config();//系统时钟初始化
GPIO_Init();//外设GPIO初始
while (1)
{
HAL_GPIO_WritePin(PD0_GPIO_Port, PD0_Pin, GPIO_PIN_SET);//BLUE LED ON 蓝灯亮
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
RCC_OscInitStruct.PLL.PLLN = 8;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
void GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
HAL_GPIO_WritePin(PD0_GPIO_Port, PD0_Pin, GPIO_PIN_SET);
GPIO_InitStruct.Pin = PD0_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(PD0_GPIO_Port, &GPIO_InitStruct);
}
void Error_Handler(void)
{
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
}
#endif /* USE_FULL_ASSERT */
编译仿真，即可点PD0处的蓝灯。
本例中需注意：在MAIN.H中宏定义 #define PD0_Pin GPIO_PIN_0
#define PD0_GPIO_Port GPIOD
5.扩展实训
让蓝灯闪烁：
while (1)
{
//HAL_GPIO_WritePin(PD0_GPIO_Port, PD0_Pin, GPIO_PIN_SET);//BLUE LED ON 蓝灯亮
HAL_Delay(1000);
HAL_GPIO_TogglePin(PD0_GPIO_Port, PD0_Pin);//取反
}
6.HAL库中GPIO控制：
/* IO operation functions *****************************************************/
GPIO_PinState
HAL_GPIO_ReadPin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin); //读GPIO
HAL_GPIO_WritePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState);//写
HAL_GPIO_TogglePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin);//取反GPIO
HAL_StatusTypeDef
HAL_GPIO_LockPin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin);//锁住管脚电平
HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin);//外部中断管理函数 清外部中断
HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin);//中断回调函数
HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin);//中断回调函数