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philippe44
2023-08-29 11:45:49 -07:00
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@@ -287,14 +287,14 @@ Each expander can support up to 32 GPIO. To use an expander for buttons, an inte
The parameter "gpio_exp_config" is a semicolon (;) separated list with following syntax for each expander
```
model=<model>,addr=<addr>,[,port=system|dac][,base=<n>|100][,count=<n>|16][,intr=<gpio>][,cs=<gpio>][,speed=<Hz>]
model=<model>,addr=<addr>,[,port=system|dac][,base=<n>][,count=<n>][,intr=<gpio>][,cs=<gpio>][,speed=<Hz>]
```
- model: pca9535, pca85xx, mcp23017 and mcp23s17 (SPI version)
- addr: chip i2c/spi address (decimal)
- port (I2C): use either "system" port (shared with display for example) or "dac" port (system is default)
- cs (SPI): gpio used for Chip Select
- speed (SPI): speed of the SPI bus for that device (in Hz)
- base: GPIO numbering offset to use everywhere else (default 40)
- base: GPIO numbering offset to use everywhere else (default 40 on esp32 and 48 on esp32-s3)
- count: number of GPIO of expander (default 16 - might be obsolted if model if sufficient to decide)
- intr: real GPIO to use as interrupt.