igrr
commented
6 years ago Could you please enable "verbose" log output level in menuconfig ( http://esp-idf.readthedocs.io/en/latest/api-reference/kconfig.html#log-default-level) and attach the new log you get for this error? Right now the code returns error "-1", which essentially means "any kind of error not handled otherwise". Verbose log should have more information about the cause of the error.
On Tue, Nov 7, 2017 at 7:19 PM, Su notifications@github.com wrote:
Hi ESP-IDF:
Right now I init the file system of SD card on main_app(). And then fire up the webserver task (mongoose webserver) later when every initialization steps are finished.
Now if I try to in webserver task accessing sd card file system by FILE* fIndex = fopen("/sdcard/index.html", "r");
I got
W (14561) webserver: Now open my new ESP32 index page E (14561) sdmmc_cmd: sdmmc_read_sectors_dma: sdmmc_send_cmd returned 0xffffffff E (14571) diskio_sdmmc: sdmmc_read_blocks failed (-1) E (14571) webserver: Failed to open file for reading
The code snippet that trigger these errors are:
ESP_LOGW(TAG, "Now open my new ESP32 index page"); FILE* fIndex = fopen("/sdcard/index.html", "r"); if (fIndex == NULL) { ESP_LOGE(TAG, "Failed to open file for reading"); return; }
The SD card initialization steps are as the example one from esp-idf. And I did checked the file I/O possibility of the file index.html from sd card in another task sd_card which basically the container of the rest part (except the initialization part of the example) of the sd card example. In this task, everything works as fine.
But how can I know what is the problem at all? ⛵️
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Gfast2
Should I do the same? Is this the real solution when I'd like to have the Ethernet and the SD Card at the same time?
sauttefk
But this one is not markt with its value. Is that means, event when after finished the board design, Olimex still need to investigate sometime to tweaking around this resistor with a proper value? It looks like, I'm not alone. ⛽️ 
Hi ESP-IDF:
Right now I init the file system of SD card on
main_app(). And then fire up the webserver task (mongoose webserver) later when every initialization steps are finished.Now if I try to in
webserver taskaccessing sd card file system byFILE* fIndex = fopen("/sdcard/index.html", "r");I got
The code snippet that trigger these errors are:
The SD card initialization steps are as the example one from esp-idf. And I did checked the file I/O possibility of the file
index.htmlfrom sd card in another tasksd_cardwhich basically the container of the rest part (except the initialization part of the example) of the sd card example. In this task, everything works as fine.But how can I know what is the problem at all? ⛵️