void SHT21::start() const {
clock(0);
mode(OUTPUT);
digiWrite(1);
clock(1);
digiWrite(0);
clock(0);
clock(1);
digiWrite(1);
clock(0);
release();
}
void SHT21::connReset() const {
mode2(OUTPUT);
clock(0);
mode(OUTPUT);
digiWrite(1);
for (uint8_t i = 0; i < 9; ++i) {
clock(1);
clock(0);
}
start();
}
void BlinkPlug::ledOff (byte mask) {
if (mask & 1) {
mode(INPUT);
digiWrite(1);
}
if (mask & 2) {
mode2(INPUT);
digiWrite2(1);
}
leds &= ~ mask;
}
void BlinkPlug::ledOn (byte mask) {
if (mask & 1) {
digiWrite(0);
mode(OUTPUT);
}
if (mask & 2) {
digiWrite2(0);
mode2(OUTPUT);
}
leds |= mask;
}
void Port::shiftWrite(uint8_t bitOrder, uint16_t value, uint8_t count) const {
uint16_t mask = bit(LSBFIRST ? 0 : count - 1);
for (uint8_t i = 0; i < count; ++i) {
digiWrite(value & mask);
if (bitOrder == LSBFIRST)
mask <<= 1;
else
mask >>= 1;
digiWrite2(1);
digiWrite2(0);
}
}
uint8_t SHT21::writeByte(uint8_t value) const {
mode(OUTPUT);
for (uint8_t i = 0x80; i != 0; i >>= 1) {
digiWrite(value & i);
clock(1);
clock(0);
}
release();
clock(1);
uint8_t error = digiRead();
clock(0);
return error;
}
uint8_t SHT21::readByte(uint8_t ack) const {
uint8_t value = 0;
for (uint8_t i = 0x80; i != 0; i >>= 1) {
clock(1);
if (digiRead())
value |= i;
clock(0);
}
mode(OUTPUT);
digiWrite(!ack);
clock(1);
clock(0);
release();
return value;
}
/** Select the channel on the multiplexer.
* @param channel A number between 1 and AOA_INPUTS_NUM.
*/
void AoAPlug::select(uint8_t channel) {
digiWrite(0);
mode(OUTPUT);
delayMicroseconds(50);
byte data = 0x10 | (channel & 0x0F);
byte mask = 1 << (portNum + 3); // digitalWrite is too slow
ATOMIC_BLOCK(ATOMIC_FORCEON) {
for (byte i = 0; i < 5; ++i) {
byte us = bitRead(data, 4 - i) ? 9 : 3;
#ifdef PORTD
PORTD |= mask;
delayMicroseconds(us);
PORTD &= ~ mask;
#else
//XXX TINY!
#endif
delayMicroseconds(4);
}
}
}
void SHT21::release() const {
mode(INPUT);
digiWrite(1);
}
