126 lines
2.4 KiB
C++
126 lines
2.4 KiB
C++
#include "SegmentDisplay.h"
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void SegmentDisplay::begin()
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{
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#if !defined(SDSupportSPI)
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pinMode(latchPin, OUTPUT);
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pinMode(clockPin, OUTPUT);
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pinMode(dataPin, OUTPUT);
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digitalWrite(clockPin, LOW);
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digitalWrite(dataPin, LOW);
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#endif
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digitalWrite(latchPin, HIGH);
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digitalWrite(latchPin, LOW);
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digitalWrite(latchPin, HIGH);
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#if defined(SDSupportSPI)
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SPI.begin();
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#endif
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}
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void SegmentDisplay::end()
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{
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#if defined(SDSupportSPI)
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SPI.end();
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#endif
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}
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void SegmentDisplay::writeNumber(uint32_t value)
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{
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byte digitMask = 1;
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for (byte digit = digits; digit > 0; digit--)
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{
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writeDigit((byte)(value % 10), digitMask);
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value /= 10;
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digitMask <<= 1;
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}
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}
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#define ASCIIZero 48
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#define ASCIINine 57
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#define ASCIIUppercaseA 65
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#define ASCIIUppercaseZ 90
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#define ASCIILowercaseA 97
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#define ASCIILowercaseZ 122
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void SegmentDisplay::writeText(char* value)
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{
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byte digitMask = 1;
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byte digit = digits;
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byte charValue;
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while (digit > 0 && value != '\0')
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{
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charValue = *value;
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// Lowercase
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if (charValue >= ASCIILowercaseA && charValue <= ASCIILowercaseZ)
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writeDisplay(SDCharacterSegments[charValue - ASCIILowercaseA], digitMask);
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// Uppercase
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else if (charValue >= ASCIIUppercaseA && charValue <= ASCIIUppercaseZ)
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writeDisplay(SDCharacterSegments[charValue - ASCIIUppercaseA], digitMask);
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// Numbers
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else if (charValue >= ASCIIZero && charValue <= ASCIINine)
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writeDisplay(SDNumberSegments[charValue - ASCIIZero], digitMask);
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// Space / unknown
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else
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writeDisplay(0, digitMask);
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digit--;
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digitMask <<= 1;
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value++;
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}
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while (digit > 0)
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{
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writeDisplay(0, digitMask);
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digit--;
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digitMask <<= 1;
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}
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}
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inline void SegmentDisplay::writeDigit(byte value, byte digitMask)
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{
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writeDisplay(SDNumberSegments[value], digitMask);
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delayMicroseconds(digitDelayMicroseconds);
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}
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#if defined(SDSupportSPI)
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inline void SegmentDisplay::writeDisplay(byte characterMask, byte digitMask)
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{
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SPI.beginTransaction(SPISettings(clockSpeed, MSBFIRST, SPI_MODE0));
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SPI.transfer(characterMask);
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SPI.transfer(digitMask);
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SPI.endTransaction();
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}
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#else
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inline void SegmentDisplay::writeDisplay(byte characterMask, byte digitMask)
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{
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digitalWrite(latchPin, LOW);
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shiftOut(dataPin, clockPin, MSBFIRST, characterMask);
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shiftOut(dataPin, clockPin, MSBFIRST, digitMask);
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digitalWrite(latchPin, HIGH);
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}
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#endif
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