Test for possible issues when both ESP and SAMD try to access SD card concurrently

maholli / SAM32

Feather-sized SAMD51 with M4 core serving as UART bridge to WROOM ESP32

https://maholli.github.io/SAM32/

42 stars 6 forks source link

Test for possible issues when both ESP and SAMD try to access SD card concurrently #17

Open gabebuckmaster opened 5 years ago

gabebuckmaster commented 5 years ago

Both SAMD and ESP are configured as masters on the SPI bus to the SD card. If, through software mis-configuration, they both try to access the SD card at the same time, it may cause hardware issues. Test this and see if it actually causes a problem. If it does, a series resistor in the SPI lines from each microcontroller may solve the issue.