Implement functions for the odometer
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Firmware/Core/apps/Inc/meter.h
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21
Firmware/Core/apps/Inc/meter.h
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/**
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******************************************************************************
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* @文件名 : meter.h
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* @作 者 : 小冯Sir
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* @brief : None
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* @注意 : None
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* @日 期 : 24-5-3
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******************************************************************************
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*/
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#ifndef FIRMWARE_CORE_APPS_INC_METER_H_
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#define FIRMWARE_CORE_APPS_INC_METER_H_
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#include "main.h"
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void taxiSystemInit();
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#endif //FIRMWARE_CORE_APPS_INC_METER_H_
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157
Firmware/Core/apps/src/meter.c
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157
Firmware/Core/apps/src/meter.c
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/**
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******************************************************************************
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* @文件名 : meter.c
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* @作 者 : 小冯Sir
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* @brief : None
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* @注意 : None
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* @日 期 : 24-5-3
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******************************************************************************
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*/
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#include "meter.h"
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#include "rtc.h"
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#include "stdlib.h"
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#include "fatfs.h"
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float price = 3;
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char *date;
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char *username;
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char *pwd;
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//日期参数
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//默认价钱
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//串口用户名和密码
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void createConfigFile() {
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FRESULT fre;
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RTC_DateTypeDef sDate;
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HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);
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char *temp = malloc(16 * sizeof(char));
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sprintf(temp, "20%02u-%02u-%02u", sDate.Year, sDate.Month, sDate
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.Date);
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cJSON *a = cJSON_CreateObject();
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cJSON_AddStringToObject(a, "Date", temp);
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cJSON_AddNumberToObject(a, "Price", price);
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cJSON_AddStringToObject(a, "username", "admin");
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cJSON_AddStringToObject(a, "pwd", "12345678");
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char *json_string = cJSON_Print(a);
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//检查system目录是否存在
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fre = f_opendir(&SDFile,"system");
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if(fre == FR_OK){
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printf("system dir exist\r\n");
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}
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else{
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fre = f_mkdir("system");
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if(fre == FR_OK){
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printf("create system dir successful\r\n");
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} else{
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printf("create system file failure\r\n");
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}
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}
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//打开并创建文件
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fre =
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f_open(&SDFile, "system/config.txt",
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FA_READ | FA_WRITE | FA_CREATE_NEW);
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if (fre == FR_OK) {
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printf("Create config.txt ok \r\n");
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UINT bw;
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if (f_write(&SDFile, json_string,
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strlen(json_string), &bw) == FR_OK) {
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printf("Write config.txt ok \r\n");
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printf("%s\r\n", json_string);
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}
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f_close(&SDFile);
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} else printf("create config.txt fail %d\r\n", fre);
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free(temp);
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free(json_string);
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}
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uint8_t checkInitFile() {
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FRESULT fre;
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fre = f_open(&SDFile, "system/config.txt", FA_READ);
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if (fre == FR_OK) {
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return 0;
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} else {
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createConfigFile();
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}
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return 1;
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}
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void taxiSystemInit() {
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DWORD file_size;
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long length;
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uint8_t *data;
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cJSON *json, *item;
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uint8_t res = checkInitFile();
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if (res == 0) {
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printf("config.txt exists\r\n");
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}
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//read config.txt
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FRESULT fre;
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fre = f_open(&SDFile, "system/config.txt", FA_READ);
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if (fre != FR_OK) {
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printf("can't open config.txt file \r\n");
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}
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//get file size
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file_size = f_size(&SDFile);
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if (fre != FR_OK) {
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printf("get file size failure\r\n");
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}
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printf("File size is %lu bytes\r\n", file_size);
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//read file
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UINT br;
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f_lseek(&SDFile, file_size);
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length = f_tell(&SDFile);
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f_lseek(&SDFile, 0);
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data = (uint8_t *)malloc(length + 1);
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if (f_read(&SDFile, data, length, &br) == FR_OK) {
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data[br] = '\0';
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printf("config.txt: %s", data);
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}
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f_close(&SDFile);
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//解析JSON数据
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json = cJSON_Parse((char *)data);
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if (!json) {
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printf("解析JSON失败！\n");
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free(data);
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}
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item = cJSON_GetObjectItemCaseSensitive(json, "Date");
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if (item && cJSON_IsString(item)) {
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date = item->valuestring;
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printf("Date: %s\r\n", date);
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} else {
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printf("Not find name\r\n");
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}
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item = cJSON_GetObjectItemCaseSensitive(json, "Price");
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if (item && cJSON_IsNumber(item) && (item->valueint == 0 ||
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item->valuedouble != 0)) {
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price = (float)item->valuedouble;
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printf("Price: %.2f\r\n", price);
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} else {
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printf("not find price\r\n");
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price = 3.0f;
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}
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item = cJSON_GetObjectItemCaseSensitive(json, "username");
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if (item && cJSON_IsString(item)) {
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username = item->valuestring;
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printf("username: %s\r\n", username);
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} else {
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printf("Not find username\r\n");
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username = "admin";
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}
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item = cJSON_GetObjectItemCaseSensitive(json, "pwd");
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if (item && cJSON_IsString(item)) {
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pwd = item->valuestring;
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printf("pwd: %s\r\n", pwd);
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} else {
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printf("Not find pwd\r\n");
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pwd = "12345678";
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}
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cJSON_Delete(json);
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free(data);
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}
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