How to continue writing in the file content in SD?

sun9091

How to continue writing in the file content in SD? [Copy link]

Use FATFS to write a file to the SD card, for example, WR.txt, the content is "THIS IS APPLE", if you want to continue writing "THIS IS APPLE" in this file, how should you operate? ? ? fresult = f_open(&g_sFileObject, g_cCmdBuf, FA_READ | FA_CREATE_ALWAYS | FA_WRITE); f_sync (&g_sFileObject); if(fresult == FR_OK) { UARTprintf("\n\f_open is ok\n"); fresult = f_write (&g_sFileObject, buf1, sizeof (buf1) - 1, &bytesWritten); f_sync (&g_sFileObject); if(fresult == FR_OK) { UARTprintf("\n\f_write is ok\n"); UARTprintf("%d\n",bytesWritten); } else { UARTprintf("\n\f_write is fail\n"); } } else { UARTprintf("\n\f_open is fail\n"); }

shower.xu

1. FA_CREATE_ALWAYS is not required. 2. After opening the file, move the file pointer to the end and then write.

sun9091

Which parameter does the file pointer refer to? ? ?

Found it, it is g_sFileObject.fptr. [ This post was last edited by sun9091 on 2012-11-28 09:19 ]