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esp32_Adafruit_BusIO
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fix mode 3

This commit is contained in:
ladyada 2025-09-11 12:20:44 -04:00
parent aa29b351d1
commit fb90221892
1 changed files with 40 additions and 17 deletions
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33
Adafruit_SPIDevice.cpp
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@ -212,12 +212,35 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
if (_miso != -1) { if (_miso != -1) {
if (BUSIO_READ_MISO()) if (BUSIO_READ_MISO())
reply |= b; reply |= b;
}
} }
BUSIO_SET_CLOCK_LOW(); BUSIO_SET_CLOCK_LOW();
} else { // if (_dataMode == SPI_MODE1 || _dataMode == SPI_MODE3) } else if (_dataMode == SPI_MODE3) {
if (_mosi != -1) { // transmit on falling edge
BUSIO_WRITE_MOSI(send & b);
}
BUSIO_SET_CLOCK_LOW();
if (bitdelay_us) {
delayMicroseconds(bitdelay_us);
}
BUSIO_SET_CLOCK_HIGH();
if (bitdelay_us) {
delayMicroseconds(bitdelay_us);
}
if (_miso != -1) { // read on rising edge
if (BUSIO_READ_MISO()) {
reply |= b;
}
}
} else { // || _dataMode == SPI_MODE1)
BUSIO_SET_CLOCK_HIGH(); BUSIO_SET_CLOCK_HIGH();
@ -237,9 +260,9 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
} }
} }
} }
if (_miso != -1) { }
buffer[i] = reply; if (_miso != -1) {
} buffer[i] = reply;
} }
} }
return; return;