m5paperS3 with SD card usage example

[rudiratlos]

Hello felmue,
thank you very much for your two examples for the m5paperS3. They gave me a head start. But I have problems to use the SD card. Can you be so kind, to post an example .ino that is using SD card.
best regards.

[felmue]

Hello @rudiratlos

what have you tried to use the SD card? Could you post your code?

Thanks
Felix

[rudiratlos]

Hello felmue,
I know that SD library is not included in m5unified/m5gfx. I tried:

SD.begin(4, SPI, 25000000); on my m5paper and
SD.begin(47, SPI, 25000000); on my new m5paperS3, but nothing worked.

my include order:
#include <SD.h>
#include <epdiy.h>
#include <M5Unified.h>

any suggestion, how get this working again?

[rudiratlos]

bool SD_begin() { bool ok=true; uint8_t PIN_SD_CS = 4; //GPIO_NUM_47; //ok = SD.begin(); // geht nicht vtl. spi pin angeben aber evtl. unterscheidlich zu m5paper und S3 ok=SD.begin(PIN_SD_CS, SPI, 25000000); // m5papaer, paperS2 hart andere pin nummer Serial.printf("SD_begin#X %d\n",ok); while (!ok) { ok=SD.begin(PIN_SD_CS, SPI, 25000000); // always false, endless loop Serial.printf("SD_begin#2 %d %d\n",ok, PIN_SD_CS); delay(500); } Serial.printf("SD_begin#9 %d\n",ok); return ok; }

[rudiratlos]

this code works for m5paper, but not for m5paperS3

bool SD_begin() { const int c_BoardVersionPaperS3=19; const int cntmax=5; bool ok=true; int cnt=1; uint8_t PIN_SD_CS = 4; //GPIO_NUM_04; int BoardVersion=M5.getBoard(); if (BoardVersion==c_BoardVersionPaperS3) { PIN_SD_CS = 47; } //SPI.begin(); ok=SD.begin(PIN_SD_CS, SPI, 25000000); while ((!ok) and (cnt<cntmax)) { cnt++; delay(500); ok=SD.begin(PIN_SD_CS, SPI, 25000000); Serial.printf("SD_begin[%d] %d try:%d\n", PIN_SD_CS, ok, cnt); if (cnt>=cntmax) { Serial.printf("ERR: SD_begin[%d] no SD card inserted\n", PIN_SD_CS); } } return ok; }