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pullup (#2348)

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Matthew Kennedy 2021-02-14 05:04:09 -08:00 committed by GitHub
parent 6ab7e151f1
commit 56b7db8e9c
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1 changed files with 6 additions and 1 deletions
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7
firmware/hw_layer/ports/stm32/stm32_common.cpp
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@ -675,7 +675,12 @@ void initSpiModule(SPIDriver *driver, brain_pin_e sck, brain_pin_e miso,
efiSetPadMode("SPI clock", sck, PAL_MODE_ALTERNATE(getSpiAf(driver)) | sckMode | PAL_STM32_OSPEED_HIGHEST);
efiSetPadMode("SPI master out", mosi, PAL_MODE_ALTERNATE(getSpiAf(driver)) | mosiMode | PAL_STM32_OSPEED_HIGHEST);
efiSetPadMode("SPI master in ", miso, PAL_MODE_ALTERNATE(getSpiAf(driver)) | misoMode | PAL_STM32_OSPEED_HIGHEST);
// Activate the internal pullup on MISO: SD cards indicate "busy" by holding MOSI low,
// so in case there is no SD card installed, the line could float low and indicate that
// the (non existent) card is busy. We pull the line high to indicate "not busy" in case
// of a missing card.
efiSetPadMode("SPI master in ", miso, PAL_MODE_ALTERNATE(getSpiAf(driver)) | misoMode | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_PULLUP);
}
void initSpiCs(SPIConfig *spiConfig, brain_pin_e csPin) {