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RTC在STM32微控制器中通常由一个独立的低功耗晶振和相关的寄存器组成。它可以独立于主处理器运行#xff0c;即使在系统电源关闭的情况下(需要备用纽扣电池)#xff0c;也能继续计时和记录日期。注意#xff1a;RTC是芯片内部的功能#xff0c;并没有和G…作用
RTC在STM32微控制器中通常由一个独立的低功耗晶振和相关的寄存器组成。它可以独立于主处理器运行即使在系统电源关闭的情况下(需要备用纽扣电池)也能继续计时和记录日期。注意RTC是芯片内部的功能并没有和GPIO相连。
CubMx配置 keil配置
由于RTC输出的数据为整型数据要想在oled上显示要添加输出整数的功能所以添加了如下函数
uint32_t OLED_POW(uint32_t X, uint32_t Y){uint32_t result 1;while(Y){result result * X;Y --;}return result;
}pow函数输出X^Y的值
void OLED_ShowNumber(unsigned char x, unsigned char y, uint32_t chr,unsigned char len, unsigned char size){unsigned i 0;unsigned j 0;while(j len){OLED_ShowChar(x, y, chr / OLED_POW(10, len - 1 - i) % 10 0, size);i ;j ;x 8;if(x 120){x 0;y 2;}}
}上述函数的作用是将整数拆解为单个字符输出如
123拆解
123 / 100 %10 1
123 / 10 % 10 2
123 / 1 % 10 3Function以及main文件
#include Function.h
#include oled.h
#include i2c.h
#include rtc.h
#include stdio.hRTC_DateTypeDef Function_GetDate;
RTC_TimeTypeDef Function_GetTime; // 用结构体接收void OLED_Write(unsigned char type, unsigned char data){unsigned char Write_data[2];Write_data[0] type;Write_data[1] data;HAL_I2C_Master_Transmit(hi2c3, 0x78, Write_data, 2, 0xff);
}void Function_OledEnable(unsigned char ms){HAL_GPIO_WritePin(OLED_POWER_GPIO_Port, OLED_POWER_Pin, GPIO_PIN_RESET);HAL_Delay(ms);OLED_Init();
}unsigned char *Function_GetLocalTime(void){static unsigned char Function_LocalTime[6];HAL_RTC_GetDate(hrtc, Function_GetDate, RTC_FORMAT_BIN);HAL_RTC_GetTime(hrtc, Function_GetTime, RTC_FORMAT_BIN); // 获取二进制Function_LocalTime[0] Function_GetDate.Year;Function_LocalTime[1] Function_GetDate.Month;Function_LocalTime[2] Function_GetDate.Date;Function_LocalTime[3] Function_GetTime.Hours;Function_LocalTime[4] Function_GetTime.Minutes;Function_LocalTime[5] Function_GetTime.Seconds;return Function_LocalTime;
}#ifndef __FUNCTION__
#define __FUNCTION__void OLED_Write(unsigned char type, unsigned char data);
void Function_OledEnable(unsigned char ms);
unsigned char *Function_GetLocalTime(void);
unsigned char * Function_Decimalism(unsigned char * ArrayBin);
#endifmain.c:
#include main.h
#include i2c.h
#include rtc.h
#include gpio.h
#include Function.h
#include oled.hvoid SystemClock_Config(void);int main(void)
{unsigned char * Time;unsigned char * Temp;HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_I2C3_Init();MX_RTC_Init();Function_OledEnable(50);while (1){/* USER CODE END WHILE */Time Function_GetLocalTime();OLED_ShowString(0, 0, TIME, 16);OLED_ShowNumber(0, 2, Time[3], 2, 16);OLED_ShowChar(16, 2, :, 16);OLED_ShowNumber(24, 2, Time[4], 2, 16);OLED_ShowChar(40, 2, :, 16);OLED_ShowNumber(48, 2, Time[5], 2, 16);/* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct {0};RCC_ClkInitTypeDef RCC_ClkInitStruct {0};RCC_PeriphCLKInitTypeDef PeriphClkInit {0};__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);RCC_OscInitStruct.OscillatorType RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSI;RCC_OscInitStruct.HSIState RCC_HSI_ON;RCC_OscInitStruct.HSICalibrationValue RCC_HSICALIBRATION_DEFAULT;RCC_OscInitStruct.LSIState RCC_LSI_ON;RCC_OscInitStruct.PLL.PLLState RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSI;RCC_OscInitStruct.PLL.PLLMUL RCC_PLLMUL_4;RCC_OscInitStruct.PLL.PLLDIV RCC_PLLDIV_2;if (HAL_RCC_OscConfig(RCC_OscInitStruct) ! HAL_OK){Error_Handler();}RCC_ClkInitStruct.ClockType RCC_CLOCKTYPE_HCLK|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_DIV1;RCC_ClkInitStruct.APB2CLKDivider RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(RCC_ClkInitStruct, FLASH_LATENCY_1) ! HAL_OK){Error_Handler();}PeriphClkInit.PeriphClockSelection RCC_PERIPHCLK_I2C3|RCC_PERIPHCLK_RTC;PeriphClkInit.I2c3ClockSelection RCC_I2C3CLKSOURCE_PCLK1;PeriphClkInit.RTCClockSelection RCC_RTCCLKSOURCE_LSI;if (HAL_RCCEx_PeriphCLKConfig(PeriphClkInit) ! HAL_OK){Error_Handler();}
}void Error_Handler(void)
{__disable_irq();while (1){}}效果
