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by SG_47
Sun Nov 21, 2021 11:40 pm
Forum: General discussion
Topic: MCP23S17 and BluePill Problem
Replies: 3
Views: 2013

Re: MCP23S17 and BluePill Problem

i took a look at the specs, it says 10 Mhz max for SPI bus. https://www.microchip.com/en-us/product/MCP23S17 use spi.BeginTransaction, pass a SPISettings with a lower speed like 10 Mhz to see if it helps. defacto SPI speeds for stm32 is like 50 Mhz, everyone assumed u'd need it to go 'as fast as po...
by SG_47
Sun Nov 14, 2021 10:33 pm
Forum: General discussion
Topic: MCP23S17 and BluePill Problem
Replies: 3
Views: 2013

MCP23S17 and BluePill Problem

Hi everyone guys, i've a problem keeping MCP23S17 in SPI mode working with my bluepill. I'm using the official arduino STM core (not the roger one) and this library https://github.com/MajenkoLibraries/MCP23S17 . I've modified this library in the readPort(uint8_t port); function adding a parameter th...

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