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esp32_Adafruit_BusIO
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support mode0 and mode1 for now

This commit is contained in:
ladyada 2019-05-18 18:59:07 -04:00
parent afd05ec7ab
commit dbe2441417
1 changed files with 21 additions and 6 deletions
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27
Adafruit_SPIDevice.cpp
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@ -59,7 +59,12 @@ bool Adafruit_SPIDevice::begin(void) {
_spi->begin();
} else {
pinMode(_sck, OUTPUT);
digitalWrite(_sck, HIGH);
if (_dataMode==SPI_MODE0) {
digitalWrite(_sck, HIGH);
} else {
digitalWrite(_sck, LOW);
}
if (_mosi != -1) {
pinMode(_mosi, OUTPUT);
digitalWrite(_mosi, HIGH);
@ -102,11 +107,21 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
}
for (int b=7; b>=0; b--) {
reply <<= 1;
digitalWrite(_sck, LOW);
digitalWrite(_mosi, send & (1<<b));
digitalWrite(_sck, HIGH);
if ((_miso != -1) && digitalRead(_miso)) {
reply |= 1;
if (_dataMode == SPI_MODE0) {
digitalWrite(_sck, LOW);
digitalWrite(_mosi, send & (1<<b));
digitalWrite(_sck, HIGH);
if ((_miso != -1) && digitalRead(_miso)) {
reply |= 1;
}
}
if (_dataMode == SPI_MODE1) {
digitalWrite(_sck, HIGH);
digitalWrite(_mosi, send & (1<<b));
digitalWrite(_sck, LOW);
if ((_miso != -1) && digitalRead(_miso)) {
reply |= 1;
}
}
}