linux+lvgl工程保存配置读取配置

typedef struct {int voltage;int current;int enable;
} system_cfg_t;system_cfg_t g_cfg;

写入config.ini

#include <stdio.h>int config_save(const char *path, system_cfg_t *cfg)
{FILE *fp = fopen(path, "w");if (!fp) {perror("fopen");return -1;}fprintf(fp, "[system]\n");fprintf(fp, "voltage=%d\n", cfg->voltage);fprintf(fp, "current=%d\n", cfg->current);fprintf(fp, "enable=%d\n", cfg->enable);fclose(fp);return 0;
}

读取config.ini

#include <stdio.h>
#include <string.h>
#include <stdlib.h>int config_load(const char *path, system_cfg_t *cfg)
{FILE *fp = fopen(path, "r");if (!fp) {perror("fopen");return -1;}char line[128];while (fgets(line, sizeof(line), fp)) {if (strncmp(line, "voltage=", 8) == 0) {cfg->voltage = atoi(line + 8);}else if (strncmp(line, "current=", 8) == 0) {cfg->current = atoi(line + 8);}else if (strncmp(line, "enable=", 7) == 0) {cfg->enable = atoi(line + 7);}}fclose(fp);return 0;
}

启动时调用

if (config_load("/mnt/data/config.ini", &g_cfg) != 0) {// 文件不存在就写默认值g_cfg.voltage = 220;g_cfg.current = 5;g_cfg.enable = 1;config_save("/mnt/data/config.ini", &g_cfg);
}

测试运行代码如下

#include <stdio.h>
#include <string.h>
#include <stdlib.h>typedef struct {int voltage;int current;int enable;
} system_cfg_t;/* 保存配置 */
int config_save(const char *path, system_cfg_t *cfg)
{FILE *fp = fopen(path, "w");if (!fp) {perror("fopen");return -1;}fprintf(fp, "[system]\n");fprintf(fp, "voltage=%d\n", cfg->voltage);fprintf(fp, "current=%d\n", cfg->current);fprintf(fp, "enable=%d\n", cfg->enable);fclose(fp);return 0;
}/* 读取配置 */
int config_load(const char *path, system_cfg_t *cfg)
{FILE *fp = fopen(path, "r");if (!fp) {perror("fopen");return -1;}char line[128];while (fgets(line, sizeof(line), fp)) {if (strncmp(line, "voltage=", 8) == 0) {cfg->voltage = atoi(line + 8);}else if (strncmp(line, "current=", 8) == 0) {cfg->current = atoi(line + 8);}else if (strncmp(line, "enable=", 7) == 0) {cfg->enable = atoi(line + 7);}}fclose(fp);return 0;
}/* 主测试函数 */
int main(void)
{system_cfg_t cfg;/* 先初始化一组测试数据 */cfg.voltage = 220;cfg.current = 5;cfg.enable  = 1;const char *path = "config.ini";system("pwd");printf("Saving config...\n");config_save(path, &cfg);/* 清零结构体，测试 load 是否真的生效 */memset(&cfg, 0, sizeof(cfg));printf("memset config\n");printf("voltage = %d\n", cfg.voltage);printf("current = %d\n", cfg.current);printf("enable  = %d\n", cfg.enable);printf("Loading config...\n");config_load(path, &cfg);printf("Config result:\n");printf("voltage = %d\n", cfg.voltage);printf("current = %d\n", cfg.current);printf("enable  = %d\n", cfg.enable);return 0;
}