jcj83429
Junior Member

@Bill Greiman Thank you!

For 4.1, please use 7. 6 also works in my test but 7 is probably safer. I don't know if any change is needed for 3.6.

I found the fix. Change #if defined(ARDUINO_TEENSY41) IOMUXC_SW_PAD_CTL_PAD_DSE(1) | to #if defined(ARDUINO_TEENSY41) IOMUXC_SW_PAD_CTL_PAD_DSE(6) |

With IOMUXC_SW_PAD_CTL_PAD_PUS(3), it takes longer to fail but still fails. edit: This may not be true. I may have just gotten lucky.

I think this is the equivalent for T4.1 https://github.com/greiman/SdFat-beta/blob/master/src/SdCard/SdioTeensy.cpp#L308-L309 . IOMUXC_SW_PAD_CTL_PAD_PUS(1) means 47K ohm pullup. I can try IOMUXC_SW_PAD_CTL_PAD_PUS(3)...

Same here. I tried with Arduino 1.8.13 and Teensyduino 1.54 beta5 and it didn't fix the problem.

@Frank B: I haven't informed Bill Greimann. I didn't think it's the SdFat library's fault. I will try with the 1.54 beta see if the same thing happens there.

I tried reflowing the solder and adding more solder to make sure the connection is good but it didn't fix the problem. I will try the 1.54 beta. Thanks. I used a file around 100MB.