STM32F746G-DISCO microSD Card Issues
Posted: Fri Sep 13, 2019 7:04 pm
Hi,
Board: STM32F746G-DISCO
Version: Chibios 17.6,18.2.2,19.1.3
Compiler: GCC 7.0 (Windows ChibiStudio)
I am trying to write to the microSD on my F7 discovery board with FatFS. Whenever using 18.2 or 19.2 I get consistent but periodic garbage on the output. See attached hellobad.txt for an example. I rolled back to the 17.6 and the same code produced no problem at all. See hello3good.txt for example of it.
In each case I take the demo included with Chibios and change the configuration to enable sd card and serial and then nothing else. The code I am using for my test is included below.
Anyone have any idea what could be different or the problem?
Thanks,
Board: STM32F746G-DISCO
Version: Chibios 17.6,18.2.2,19.1.3
Compiler: GCC 7.0 (Windows ChibiStudio)
I am trying to write to the microSD on my F7 discovery board with FatFS. Whenever using 18.2 or 19.2 I get consistent but periodic garbage on the output. See attached hellobad.txt for an example. I rolled back to the 17.6 and the same code produced no problem at all. See hello3good.txt for example of it.
In each case I take the demo included with Chibios and change the configuration to enable sd card and serial and then nothing else. The code I am using for my test is included below.
Code: Select all
sdStart(&SD1, NULL);
static BaseSequentialStream* chp = (BaseSequentialStream*)&SD1;
if (!blkIsInserted(&SDCD1)) {
chprintf(chp, "Card not inserted, aborting.\r\n");
}
else{
chprintf(chp, "Card is inserted.\r\n");
}
chprintf(chp, "Connecting... ");
if (sdcConnect(&SDCD1)) {
chprintf(chp, "failed\r\n");
}
FATFS fs; /* Filesystem object */
FIL fil; /* File object */
FRESULT res; /* API result code */
UINT bw; /* Bytes written */
f_mount(&fs, "", 0);
res = f_open(&fil, "hello4.txt", FA_CREATE_ALWAYS | FA_WRITE);
for (int i = 0; i < 200; ++i) {
f_write(&fil, "Hello, World!\r\n", 15, &bw);
}
f_close(&fil);
chprintf(chp, "done writing");Anyone have any idea what could be different or the problem?
Thanks,