Implement functions for the odometer

Firmware/Core/apps/Inc/meter.h

@@ -0,0 +1,21 @@
+/**
+  ******************************************************************************
+  * @文件名           : meter.h
+  * @作 者           : 小冯Sir
+  * @brief          : None
+  * @注意            : None
+  * @日 期           : 24-5-3
+  ******************************************************************************
+  */
+
+#ifndef FIRMWARE_CORE_APPS_INC_METER_H_
+#define FIRMWARE_CORE_APPS_INC_METER_H_
+
+#include "main.h"
+
+
+
+void taxiSystemInit();
+
+
+#endif //FIRMWARE_CORE_APPS_INC_METER_H_

Firmware/Core/apps/src/meter.c

@@ -0,0 +1,157 @@
+/**
+  ******************************************************************************
+  * @文件名           : meter.c
+  * @作 者           : 小冯Sir
+  * @brief          : None
+  * @注意            : None
+  * @日 期           : 24-5-3
+  ******************************************************************************
+  */
+#include "meter.h"
+#include "rtc.h"
+#include "stdlib.h"
+#include "fatfs.h"
+
+float price = 3;
+char *date;
+char *username;
+char *pwd;
+
+//日期参数
+//默认价钱
+//串口用户名和密码
+void createConfigFile() {
+  FRESULT fre;
+  RTC_DateTypeDef sDate;
+  HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);
+  char *temp = malloc(16 * sizeof(char));
+  sprintf(temp, "20%02u-%02u-%02u", sDate.Year, sDate.Month, sDate
+	  .Date);
+  cJSON *a = cJSON_CreateObject();
+  cJSON_AddStringToObject(a, "Date", temp);
+  cJSON_AddNumberToObject(a, "Price", price);
+  cJSON_AddStringToObject(a, "username", "admin");
+  cJSON_AddStringToObject(a, "pwd", "12345678");
+  char *json_string = cJSON_Print(a);
+
+  //检查system目录是否存在
+  fre = f_opendir(&SDFile,"system");
+  if(fre == FR_OK){
+	printf("system dir exist\r\n");
+  }
+  else{
+	fre = f_mkdir("system");
+	if(fre == FR_OK){
+	  printf("create system dir successful\r\n");
+	} else{
+	  printf("create system file failure\r\n");
+	}
+  }
+
+  //打开并创建文件
+  fre =
+	  f_open(&SDFile, "system/config.txt",
+			 FA_READ | FA_WRITE | FA_CREATE_NEW);
+  if (fre == FR_OK) {
+	printf("Create config.txt ok \r\n");
+	UINT bw;
+	if (f_write(&SDFile, json_string,
+				strlen(json_string), &bw) == FR_OK) {
+	  printf("Write config.txt ok \r\n");
+	  printf("%s\r\n", json_string);
+	}
+	f_close(&SDFile);
+  } else printf("create config.txt fail %d\r\n", fre);
+
+  free(temp);
+  free(json_string);
+}
+
+uint8_t checkInitFile() {
+  FRESULT fre;
+  fre = f_open(&SDFile, "system/config.txt", FA_READ);
+  if (fre == FR_OK) {
+	return 0;
+  } else {
+	createConfigFile();
+  }
+  return 1;
+}
+
+void taxiSystemInit() {
+  DWORD file_size;
+  long length;
+  uint8_t *data;
+  cJSON *json, *item;
+  uint8_t res = checkInitFile();
+  if (res == 0) {
+	printf("config.txt exists\r\n");
+  }
+  //read config.txt
+  FRESULT fre;
+  fre = f_open(&SDFile, "system/config.txt", FA_READ);
+  if (fre != FR_OK) {
+	printf("can't open config.txt file \r\n");
+  }
+  //get file size
+  file_size = f_size(&SDFile);
+  if (fre != FR_OK) {
+	printf("get file size failure\r\n");
+  }
+  printf("File size is %lu bytes\r\n", file_size);
+  //read file
+  UINT br;
+  f_lseek(&SDFile, file_size);
+  length = f_tell(&SDFile);
+  f_lseek(&SDFile, 0);
+  data = (uint8_t *)malloc(length + 1);
+  if (f_read(&SDFile, data, length, &br) == FR_OK) {
+	data[br] = '\0';
+	printf("config.txt: %s", data);
+  }
+  f_close(&SDFile);
+
+  //解析JSON数据
+  json = cJSON_Parse((char *)data);
+  if (!json) {
+	printf("解析JSON失败！\n");
+	free(data);
+  }
+  item = cJSON_GetObjectItemCaseSensitive(json, "Date");
+  if (item && cJSON_IsString(item)) {
+	date = item->valuestring;
+	printf("Date: %s\r\n", date);
+  } else {
+	printf("Not find name\r\n");
+  }
+  item = cJSON_GetObjectItemCaseSensitive(json, "Price");
+  if (item && cJSON_IsNumber(item) && (item->valueint == 0 ||
+	  item->valuedouble != 0)) {
+	price = (float)item->valuedouble;
+	printf("Price: %.2f\r\n", price);
+  } else {
+	printf("not find price\r\n");
+	price = 3.0f;
+  }
+  item = cJSON_GetObjectItemCaseSensitive(json, "username");
+  if (item && cJSON_IsString(item)) {
+	username = item->valuestring;
+	printf("username: %s\r\n", username);
+  } else {
+	printf("Not find username\r\n");
+	username = "admin";
+  }
+
+  item = cJSON_GetObjectItemCaseSensitive(json, "pwd");
+  if (item && cJSON_IsString(item)) {
+	pwd = item->valuestring;
+	printf("pwd: %s\r\n", pwd);
+  } else {
+	printf("Not find pwd\r\n");
+	pwd = "12345678";
+  }
+  cJSON_Delete(json);
+  free(data);
+}
+
+