蓝桥杯物联网竞赛_STM32L071_6

蓝桥杯物联网竞赛_STM32L071_6_RTC显示

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 = 3

Function以及main文件：

#include "Function.h"
#include "oled.h"
#include "i2c.h"
#include "rtc.h"
#include <stdio.h>RTC_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);
#endif

main.c:

#include "main.h"
#include "i2c.h"
#include "rtc.h"
#include "gpio.h"
#include "Function.h"
#include "oled.h"void 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){}}