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philippe44
2021-12-21 02:00:56 -08:00
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@@ -138,7 +138,7 @@ sda=<gpio>,scl=<gpio>[,port=0|1][,speed=<speed>]
```
<strong>Please note that you can not use the same GPIO or port as the DAC</strong>
### SPI
The esp32 has 4 SPI sub-systems but SPI0, SPI1 and SPI3 are reserved for internal use and Flash/PSRAM, so only SPI2 is available. The NVS parameter "spi_config" set the spi's gpio used for user purpose (e.g. display, ethernet, GPIO expander). Leave it blank to disable SPI usage. The DC parameter is needed for displays. Syntax is
The esp32 has 3 user-accessible SPI sub-systems but SPI0 and SPI2 are reserved for internal use and Flash/PSRAM, so only SPI1 is available. The NVS parameter "spi_config" set the spi's gpio used for user purpose (e.g. display, ethernet, GPIO expander). Leave it blank to disable SPI usage. The DC parameter is needed for displays. Syntax is
```
data|mosi=<gpio>,clk=<gpio>[,dc=<gpio>][,host=1][,miso=<gpio>]
```