I don't have enough pins on my Esp32 board. I would like to use a pin expander. All the ones I could find online only use i2c. Are there ones available that use SPI?
I would like send pwm signals to the pin expander outputs. Is that possible?
-
Pin extenders for when you don't have enough pins on your board.Nadim Ahmed– Nadim Ahmed2019-06-07 17:33:03 +00:00Commented Jun 7, 2019 at 17:33
-
@Juraj what do you call this microchip.com/wwwproducts/en/MCP23S17Nadim Ahmed– Nadim Ahmed2019-06-07 18:03:36 +00:00Commented Jun 7, 2019 at 18:03
-
@Juraj I need to use the pins simultaneously. Multiplexers can only output through one pin at a time.Nadim Ahmed– Nadim Ahmed2019-06-07 18:15:06 +00:00Commented Jun 7, 2019 at 18:15
-
@NadimAhmed I do those chips in pairs on a breakout board: majenko.co.uk/expander32.phpMajenko– Majenko2019-06-07 18:18:36 +00:00Commented Jun 7, 2019 at 18:18
-
@NadimAhmed The MCP23017 GPIO expander chips are digital only; ie., they can NOT do PWM.stevieb– stevieb2019-06-08 16:18:06 +00:00Commented Jun 8, 2019 at 16:18
Add a comment
|
1 Answer
Here you go https://www.microchip.com/wwwproducts/en/MCP23S17. Found it. I am gonna leave this here in case anyone needs it.
-
3I assume you will still have problems sending "pwm signals to these pin extender pins"Sim Son– Sim Son2019-06-07 19:28:59 +00:00Commented Jun 7, 2019 at 19:28