/*
* © 2024, Chris Harlow. All rights reserved.
*
* This file is part of DCC++EX API
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see .
*/
#include
#include "IODevice.h"
#include "DIAG.h"
const uint8_t HIGHFLASH _digits[16]={
0b00111111,0b00000110,0b01011011,0b01001111,
0b01100110,0b01101101,0b01111101,0b00000111,
0b01111111,0b01101111,0b01110111,0b01111100,
0b00111001,0b01011110,0b01111001,0b01110001
};
// Constructor
TM1638::TM1638(VPIN firstVpin, byte clk_pin,byte dio_pin,byte stb_pin){
_firstVpin = firstVpin;
_nPins = 8;
_clk_pin = clk_pin;
_stb_pin = stb_pin;
_dio_pin = dio_pin;
pinMode(clk_pin,OUTPUT);
pinMode(stb_pin,OUTPUT);
pinMode(dio_pin,OUTPUT);
_pulse = PULSE1_16;
_buttons=0;
_leds=0;
_lastLoop=micros();
addDevice(this);
}
void TM1638::create(VPIN firstVpin, byte clk_pin,byte dio_pin,byte stb_pin) {
if (checkNoOverlap(firstVpin,8))
new TM1638(firstVpin, clk_pin,dio_pin,stb_pin);
}
void TM1638::_begin() {
displayClear();
test();
_display();
}
void TM1638::_loop(unsigned long currentMicros) {
if (currentMicros - _lastLoop > (1000000UL/LoopHz)) {
_buttons=getButtons();// Read the buttons
_lastLoop=currentMicros;
}
}
void TM1638::_display() {
DIAG(F("TM1638 Configured on Vpins:%u-%u"), _firstVpin, _firstVpin+_nPins-1);
}
// digital read gets button state
int TM1638::_read(VPIN vpin) {
byte pin=vpin - _firstVpin;
bool result=bitRead(_buttons,pin);
// DIAG(F("TM1638 read (%d) buttons %x = %d"),pin,_buttons,result);
return result;
}
// digital write sets led state
void TM1638::_write(VPIN vpin, int value) {
// TODO.. skip if no state change
writeLed(vpin - _firstVpin + 1,value!=0);
}
// Analog write sets digit displays
void TM1638::_writeAnalogue(VPIN vpin, int lowBytes, uint8_t mode, uint16_t highBytes) {
// mode is in DataFormat defined above.
byte formatLength=mode & 0x0F; // last 4 bits
byte formatType=mode & 0xF0; //
int8_t leftDigit=vpin-_firstVpin; // 0..7 from left
int8_t rightDigit=leftDigit+formatLength-1; // 0..7 from left
// loading is done right to left startDigit first
int8_t startDigit=7-rightDigit; // reverse as 7 on left
int8_t lastDigit=7-leftDigit; // reverse as 7 on left
uint32_t value=highBytes;
value<<=16;
value |= (uint16_t)lowBytes;
//DIAG(F("TM1638 fl=%d ft=%x sd=%d ld=%d v=%l vx=%X"),
// formatLength,formatType,startDigit,lastDigit,value,value);
while(startDigit<=lastDigit) {
switch (formatType) {
case _DF_DECIMAL:// decimal (leading zeros)
displayDig(startDigit,GETHIGHFLASH(_digits,(value%10)));
value=value/10;
break;
case _DF_HEX:// HEX (leading zeros)
displayDig(startDigit,GETHIGHFLASH(_digits,(value & 0x0F)));
value>>=4;
break;
case _DF_RAW:// Raw 7-segment pattern
displayDig(startDigit,value & 0xFF);
value>>=8;
break;
default:
DIAG(F("TM1368 invalid mode 0x%x"),mode);
return;
}
startDigit++;
}
}
uint8_t TM1638::getButtons(){
ArduinoPins::fastWriteDigital(_stb_pin, LOW);
writeData(INSTRUCTION_READ_KEY);
pinMode(_dio_pin, INPUT);
ArduinoPins::fastWriteDigital(_clk_pin, LOW);
uint8_t buttons=0;
for (uint8_t eachByte=0; eachByte<4;eachByte++) {
uint8_t value = 0;
for (uint8_t eachBit = 0; eachBit < 8; eachBit++) {
ArduinoPins::fastWriteDigital(_clk_pin, HIGH);
value |= ArduinoPins::fastReadDigital(_dio_pin) << eachBit;
ArduinoPins::fastWriteDigital(_clk_pin, LOW);
}
buttons |= value << eachByte;
delayMicroseconds(1);
}
pinMode(_dio_pin, OUTPUT);
ArduinoPins::fastWriteDigital(_stb_pin, HIGH);
return buttons;
}
void TM1638::displayDig(uint8_t digitId, uint8_t pgfedcba){
if (digitId>7) return;
setDataInstruction(DISPLAY_TURN_ON | _pulse);
setDataInstruction(INSTRUCTION_WRITE_DATA| INSTRUCTION_ADDRESS_FIXED);
writeDataAt(FIRST_DISPLAY_ADDRESS+14-(digitId*2), pgfedcba);
}
void TM1638::displayClear(){
setDataInstruction(DISPLAY_TURN_ON | _pulse);
setDataInstruction(INSTRUCTION_WRITE_DATA | INSTRUCTION_ADDRESS_FIXED);
for (uint8_t i=0;i<15;i+=2){
writeDataAt(FIRST_DISPLAY_ADDRESS+i,0x00);
}
}
void TM1638::writeLed(uint8_t num,bool state){
if ((num<1) | (num>8)) return;
setDataInstruction(DISPLAY_TURN_ON | _pulse);
setDataInstruction(INSTRUCTION_WRITE_DATA | INSTRUCTION_ADDRESS_FIXED);
writeDataAt(FIRST_DISPLAY_ADDRESS + (num*2-1), state);
}
void TM1638::writeData(uint8_t data){
for (uint8_t i = 0; i < 8; i++) {
ArduinoPins::fastWriteDigital(_dio_pin, data & 1);
data >>= 1;
ArduinoPins::fastWriteDigital(_clk_pin, HIGH);
ArduinoPins::fastWriteDigital(_clk_pin, LOW);
}
}
void TM1638::writeDataAt(uint8_t displayAddress, uint8_t data){
ArduinoPins::fastWriteDigital(_stb_pin, LOW);
writeData(displayAddress);
writeData(data);
ArduinoPins::fastWriteDigital(_stb_pin, HIGH);
delayMicroseconds(1);
}
void TM1638::setDataInstruction(uint8_t dataInstruction){
ArduinoPins::fastWriteDigital(_stb_pin, LOW);
writeData(dataInstruction);
ArduinoPins::fastWriteDigital(_stb_pin, HIGH);
delayMicroseconds(1);
}
void TM1638::test(){
DIAG(F("TM1638 test"));
uint8_t val=0;
for(uint8_t i=0;i<5;i++){
setDataInstruction(DISPLAY_TURN_ON | _pulse);
setDataInstruction(INSTRUCTION_WRITE_DATA| INSTRUCTION_ADDRESS_AUTO);
ArduinoPins::fastWriteDigital(_stb_pin, LOW);
writeData(FIRST_DISPLAY_ADDRESS);
for(uint8_t i=0;i<16;i++)
writeData(val);
ArduinoPins::fastWriteDigital(_stb_pin, HIGH);
delay(1000);
val = ~val;
}
}