Code: Select all
void spiffs_save_test(void)
{
uint8_t test[] = {0x01, 0x02, 0x03, 0x23, 0x02, 0x10};
FILE *f = fopen("/spiffs/RFID/01.bin", "rb+");
fwrite(test, sizeof(uint8_t), 6, f);//写入数据
printf("/spiffs/RFID/01.bin写人%d个字节\n", (uint16_t)ftell(f));
fclose(f);//关闭文件,
f = NULL;//文件指针指向空,避免出现游离指针;
}
void spiffs_read_test(void)
{
uint8_t i=0;
uint16_t size=0;
char file_path[] = "/spiffs/RFID/??.bin\0";
i=1;
hex_to_asciistring( i, &file_path[13] );//把十六进制转成字符串,0x01转为“01”
FILE *f = fopen(file_path, "rb"); //打开文件
fseek(f,0,SEEK_END); //指针移到末尾
size = (uint16_t)ftell(f);//获取指针偏移量
ESP_LOGI(TAG, "size=%d,file_path=%s", size, file_path);
fclose(f);//关闭文件,
f = NULL;//文件指针指向空,避免出现游离指针;
for(i=0; i<2 ; i++)
{
hex_to_asciistring( i, &file_path[13] );//把十六进制转成字符串,0x01转为“03”
f = fopen(file_path, "rb"); //打开文件
fseek(f,0,SEEK_END); //指针移到末尾
size = (uint16_t)ftell(f);//获取指针偏移量
if( i == 1)
ESP_LOGI(TAG, "size=%d,file_path=%s", size, file_path);
fclose(f);//关闭文件
f = NULL;//文件指针指向空,避免出现游离指针;
}
}
void hex_to_asciistring(uint8_t data, char* pascii)
{
int i;
for (i = 1; i >= 0; i--, data >>= 4)
{
if ((data & 0xf) <= 9)
pascii[i] = (data & 0xf) + '0';
else
pascii[i] = (data & 0xf) + 'A' - 0x0a;
}
}
则读数据正常,不明白这是为什么,我实际应用需要连续读256个.bin文件判断大小,测试发现读两个就出错了
/spiffs/RFID/01.bin写人6个字节
I (977) spiff: size=6,file_path=/spiffs/RFID/01.bin
I (1137) spiff: size=0,file_path=/spiffs/RFID/01.bin