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Add support for ESP32 #5

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merged 3 commits into from
Sep 26, 2021
Merged

Add support for ESP32 #5

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c954fb1
Add support for ESP32
alexthomazo Sep 25, 2021
2dadefe
Rework ESP32 timing for less waiting
alexthomazo Sep 26, 2021
afe0da8
Tweaking a little more timing for ESP32
alexthomazo Sep 26, 2021
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44 changes: 30 additions & 14 deletions TM1637.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -192,14 +192,15 @@ uint8_t TM1637::writeByte(uint8_t data)
// shift out data 8 bits LSB first
for (uint8_t i = 8; i > 0; i--)
{
digitalWrite(_clock, LOW);
digitalWrite(_data, data & 0x01);
digitalWrite(_clock, HIGH);
writeSync(_clock, LOW);
writeSync(_data, data & 0x01);
writeSync(_clock, HIGH);
data >>= 1;
}
digitalWrite(_clock, LOW);
digitalWrite(_data, HIGH);
digitalWrite(_clock, HIGH);

writeSync(_clock, LOW);
writeSync(_data, HIGH);
writeSync(_clock, HIGH);

// get ACKNOWLEDGE
pinMode(_data, INPUT);
Expand All @@ -216,20 +217,35 @@ uint8_t TM1637::writeByte(uint8_t data)

void TM1637::start()
{
digitalWrite(_clock, HIGH);
digitalWrite(_data, HIGH);
digitalWrite(_data, LOW);
digitalWrite(_clock, LOW);
writeSync(_clock, HIGH);
writeSync(_data, HIGH);
writeSync(_data, LOW);
writeSync(_clock, LOW);
}


void TM1637::stop()
{
digitalWrite(_clock, LOW);
digitalWrite(_data, LOW);
digitalWrite(_clock, HIGH);
digitalWrite(_data, HIGH);
writeSync(_clock, LOW);
writeSync(_data, LOW);
writeSync(_clock, HIGH);
writeSync(_data, HIGH);
}

void TM1637::writeSync(uint8_t pin, uint8_t val)
{
digitalWrite(pin, val);

#if defined(ESP32)
nanoDelay(2);
#endif

}

void TM1637::nanoDelay(uint16_t n)
{
volatile uint16_t i = n;
while (i--);
}

// -- END OF FILE --
3 changes: 3 additions & 0 deletions TM1637.h
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,9 @@ class TM1637
uint8_t writeByte(uint8_t data);
void start();
void stop();

void writeSync(uint8_t pin, uint8_t val);
void nanoDelay(uint16_t n);
};

// -- END OF FILE --