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adding check for _mosi== -1

This commit is contained in:
siddacious 2020-04-20 16:27:00 -07:00
parent 4cf47a3fef
commit c852d5744c
1 changed files with 9 additions and 2 deletions
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11
Adafruit_SPIDevice.cpp
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@ -124,7 +124,9 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
for (int b = 7; b >= 0; b--) { for (int b = 7; b >= 0; b--) {
reply <<= 1; reply <<= 1;
if (_dataMode == SPI_MODE0) { if (_dataMode == SPI_MODE0) {
digitalWrite(_mosi, send & (1 << b)); if (_mosi != -1) {
digitalWrite(_mosi, send & (1 << b));
}
digitalWrite(_sck, HIGH); digitalWrite(_sck, HIGH);
if ((_miso != -1) && digitalRead(_miso)) { if ((_miso != -1) && digitalRead(_miso)) {
reply |= 1; reply |= 1;
@ -133,13 +135,18 @@ void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
} }
if (_dataMode == SPI_MODE1) { if (_dataMode == SPI_MODE1) {
digitalWrite(_sck, HIGH); digitalWrite(_sck, HIGH);
digitalWrite(_mosi, send & (1 << b)); if (_mosi != -1) {
digitalWrite(_mosi, send & (1 << b));
}
digitalWrite(_sck, LOW); digitalWrite(_sck, LOW);
if ((_miso != -1) && digitalRead(_miso)) { if ((_miso != -1) && digitalRead(_miso)) {
reply |= 1; reply |= 1;
} }
} }
} }
// Serial.print(" : 0x"); Serial.print(reply, HEX); // Serial.print(" : 0x"); Serial.print(reply, HEX);
if (_dataOrder == SPI_BITORDER_LSBFIRST) { if (_dataOrder == SPI_BITORDER_LSBFIRST) {
// LSB is rare, if it happens we'll just flip the bits around for them // LSB is rare, if it happens we'll just flip the bits around for them