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04df1f3a42
esp-idf/examples/peripherals/spi_master/hd_eeprom/README.md
Marius Vikhammer 04df1f3a42 CI: enable example builds for C3 
Enables building C3 examples in CI.

Fixes related warnings/errors and disables examples that cannot run.
2021-02-09 12:04:02 +08:00

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SPI master half duplex EEPROM example

This code demonstrates how to use the SPI master half duplex mode to read/write a AT93C46D EEPROM (8-bit mode). There is also an Kconfig option EXAMPLE_USE_SPI1_PINS allowing use the SPI1 (bus with code Flash connected on official modules).

Connections

For different chip and host used, the connections may be different.

ESP32 ESP32 ESP32S2 ESP32C3
Host SPI1 HSPI FSPI SPI2
VCC 3.3V 3.3V 3.3V 3.3V
GND GND GND GND GND
DO 7 18 37 2
DI 8 23 35 7
SK 6 19 36 6
CS 13 13 34 10
ORG GND GND GND GND

Notes

If you meet timeout issues, please check your connections.