esp-idf

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History

Angus Gratton 2d22fbd4ff cmake: Add missing example CMakeLists.txt files, CI check all examples have both		2018-08-28 11:11:57 +08:00
..
receiver	cmake: Add missing example CMakeLists.txt files, CI check all examples have both	2018-08-28 11:11:57 +08:00
sender	cmake: Add missing example CMakeLists.txt files, CI check all examples have both	2018-08-28 11:11:57 +08:00
README.md	Added / corrected README files for the SPI master / slave examples under peripherals	2018-03-12 05:56:35 +01:00

README.md

SPI slave example

These two projects illustrate the SPI Slave driver. They're supposed to be flashed into two separate ESP32s connected to eachother using the SPI pins defined in app_main.c. Once connected and flashed, they will use the spi master and spi slave driver to communicate with eachother. The example also includes a handshaking line to allow the master to only poll the slave when it is actually ready to parse a transaction.

Please run wires between the following GPIOs between the slave and master to make the example function:

Signal	Slave	Master
Handshake	GPIO2	GPIO2
MOSI	GPIO12	GPIO12
MISO	GPIO13	GPIO13
SCLK	GPIO15	GPIO15
CS	GPIO14	GPIO14

Be aware that the example by default uses lines normally reserved for JTAG. If this is an issue, either because of hardwired JTAG hardware or because of the need to do JTAG debugging, feel free to change the GPIO settings by editing defines in the top of main.c in the master/slave source code.