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SpiLine.h
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SpiLine.h
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/*
* Copyright (C) 2017 Lakoja on github.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _SpiLine_H_
#define _SpiLine_H_
#define SPI_DEFAULT_FREQUENCY 16000000
#include <SPI.h>
class SpiLine
{
private:
SPIClass& spiSink;
uint8_t selectPin, dataCommandPin, resetPin;
bool transactionStarted = false;
public:
SpiLine(SPIClass& spi, uint8_t cs, uint8_t dc, uint8_t rst) : spiSink(spi)
{
selectPin = cs;
dataCommandPin = dc;
resetPin = rst;
}
void reset()
{
digitalWrite(resetPin, LOW);
delay(40);
digitalWrite(resetPin, HIGH);
delay(40);
}
void init(uint32_t freq = SPI_DEFAULT_FREQUENCY)
{
digitalWrite(selectPin, HIGH);
pinMode(selectPin, OUTPUT);
digitalWrite(dataCommandPin, HIGH);
pinMode(dataCommandPin, OUTPUT);
digitalWrite(resetPin, HIGH);
pinMode(resetPin, OUTPUT);
reset();
spiSink.begin();
spiSink.setDataMode(SPI_MODE0);
spiSink.setBitOrder(MSBFIRST);
spiSink.setFrequency(freq);
}
void writeCommandTransaction(uint8_t c)
{
startTransaction();
writeCommand(c);
endTransaction();
}
void writeDataTransaction(uint8_t d)
{
startTransaction();
writeData(d);
endTransaction();
}
void writeCommand(uint8_t c)
{
if (!transactionStarted) {
Serial.print("NO TRANSACTION ");
Serial.println(c);
}
digitalWrite(dataCommandPin, LOW);
spiSink.transfer(c);
digitalWrite(dataCommandPin, HIGH);
}
void writeData(uint8_t d)
{
if (!transactionStarted)
Serial.println("NO TRANSACTION");
spiSink.transfer(d);
}
void startTransaction()
{
digitalWrite(selectPin, LOW);
transactionStarted = true;
}
void endTransaction()
{
digitalWrite(selectPin, HIGH);
transactionStarted = false;
}
};
#endif