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续写成功，删除只读

This commit is contained in:
james 2024-07-31 03:35:23 +08:00
parent 3ab862f16f
commit 85fbfc67e4
1 changed files with 6 additions and 30 deletions
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36
Day5/mqtt.c
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@ -22,8 +22,8 @@ uint64_t HAL_UptimeMs(void);
int HAL_Snprintf(char *str, const int len, const char *fmt, ...);
//定义接受文件内容的缓冲区
char buffer[100] = {};
char tmp[256];
char buffer[1026] = {};
char tmp[1026];
#define GPIO_LED_B GET_PIN(F,11)
#define GPIO_LED_R GET_PIN(F,12)
@ -105,10 +105,9 @@ void make_file()
{
//文件描述符
int fd;
// String = "Hello, RT-Thread.Welcom to RSOC!\n temp: 123, humi: 789";
//用只写方式打开文件,如果没有该文件,则创建一个文件
fd = open("/fal/test/Data.txt", O_WRONLY | O_CREAT | O_APPEND,0); //和原来相比，只是把O_TRUNC参数更改为O_APPEND，即更改为打开后，如果再进行写入，将从文件的末尾位置开始写。
fd = open("/fal/test/Data.txt", O_WRONLY | O_CREAT | O_APPEND); //和原来相比，只是把O_TRUNC参数更改为O_APPEND，即更改为打开后，如果再进行写入，将从文件的末尾位置开始写。
// rt_kprintf("\n%f %f tmp:%s\n",Humi,Temp,String);
//如果打开成功
if (fd >= 0)
@ -126,30 +125,7 @@ void make_file()
rt_kprintf("File Open Fail.\n");
}
//用只读方式打开文件
fd = open("/fal/test/Data.txt", O_RDONLY);
if (fd>= 0)
{
//读取文件内容
rt_uint32_t size = read(fd, buffer, sizeof(buffer));
if (size < 0)
{
rt_kprintf("Read File Fail.\n");
return ;
}
//输出文件内容
rt_kprintf("Read from file test.txt : %s \n", buffer);
//关闭文件
close(fd);
}
else
{
rt_kprintf("File Open Fail.\n");
}
return;
}
int cnt = 0;
@ -159,9 +135,9 @@ void tmp_payload(void)
Humi = aht10_read_humidity(Dev);
Temp = aht10_read_temperature(Dev);
memset(tmp, 0, sizeof(tmp));
sprintf(tmp, "Temp: %f;Humi: %f;Count: %d\n", Temp, Humi,++cnt);
sprintf(tmp, "Temp: %.1f;Humi: %.1f;Count: %d\n", Temp, Humi,++cnt);
// rt_kprintf("\n%f %f tmp:%s\n",Humi,Temp,tmp);
make_file(tmp);
make_file();
sprintf(tmp, "{\"params\":{\"temperature\":%.2f,\"humidity\":%.2f}}", Temp, Humi);
return;
}