Tasmota/sonoff/xsns_28_tm1638.ino

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/*
xsns_28_tm1638.ino - TM1638 8 switch, led and 7 segment unit support for Sonoff-Tasmota
Copyright (C) 2018 Theo Arends
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_TM1638
/*********************************************************************************************\
* TM1638 8 switch, led and 7 segment
*
* Uses GPIO TM16 DIO, TM16 CLK and TM16 STB
\*********************************************************************************************/
#define XSNS_28 28
#define TM1638_COLOR_NONE 0
#define TM1638_COLOR_RED 1
#define TM1638_COLOR_GREEN 2
#define TM1638_CLOCK_DELAY 1 // uSec
uint8_t tm1638_type = 1;
uint8_t tm1638_clock_pin = 0;
uint8_t tm1638_data_pin = 0;
uint8_t tm1638_strobe_pin = 0;
uint8_t tm1638_displays = 8;
uint8_t tm1638_active_display = 1;
uint8_t tm1638_intensity = 0;
uint8_t tm1638_state = 0;
/*********************************************************************************************\
* Pieces from library https://github.com/rjbatista/tm1638-library
* and from library https://github.com/MartyMacGyver/TM1638-demos-and-examples
\*********************************************************************************************/
void Tm16XXSend(byte data)
{
for (uint8_t i = 0; i < 8; i++) {
digitalWrite(tm1638_data_pin, !!(data & (1 << i)));
digitalWrite(tm1638_clock_pin, LOW);
delayMicroseconds(TM1638_CLOCK_DELAY);
digitalWrite(tm1638_clock_pin, HIGH);
}
}
void Tm16XXSendCommand(byte cmd)
{
digitalWrite(tm1638_strobe_pin, LOW);
Tm16XXSend(cmd);
digitalWrite(tm1638_strobe_pin, HIGH);
}
void TM16XXSendData(byte address, byte data)
{
Tm16XXSendCommand(0x44);
digitalWrite(tm1638_strobe_pin, LOW);
Tm16XXSend(0xC0 | address);
Tm16XXSend(data);
digitalWrite(tm1638_strobe_pin, HIGH);
}
byte Tm16XXReceive()
{
byte temp = 0;
// Pull-up on
pinMode(tm1638_data_pin, INPUT);
digitalWrite(tm1638_data_pin, HIGH);
for (uint8_t i = 0; i < 8; ++i) {
digitalWrite(tm1638_clock_pin, LOW);
delayMicroseconds(TM1638_CLOCK_DELAY);
temp |= digitalRead(tm1638_data_pin) << i;
digitalWrite(tm1638_clock_pin, HIGH);
}
// Pull-up off
pinMode(tm1638_data_pin, OUTPUT);
digitalWrite(tm1638_data_pin, LOW);
return temp;
}
/*********************************************************************************************/
void Tm16XXClearDisplay()
{
for (int i = 0; i < tm1638_displays; i++) {
TM16XXSendData(i << 1, 0);
}
}
void Tm1638SetLED(byte color, byte pos)
{
TM16XXSendData((pos << 1) + 1, color);
}
void Tm1638SetLEDs(word leds)
{
for (int i = 0; i < tm1638_displays; i++) {
byte color = 0;
if ((leds & (1 << i)) != 0) {
color |= TM1638_COLOR_RED;
}
if ((leds & (1 << (i + 8))) != 0) {
color |= TM1638_COLOR_GREEN;
}
Tm1638SetLED(color, i);
}
}
byte Tm1638GetButtons()
{
byte keys = 0;
digitalWrite(tm1638_strobe_pin, LOW);
Tm16XXSend(0x42);
for (int i = 0; i < 4; i++) {
keys |= Tm16XXReceive() << i;
}
digitalWrite(tm1638_strobe_pin, HIGH);
return keys;
}
/*********************************************************************************************/
void TmInit()
{
tm1638_type = 0;
if ((pin[GPIO_TM16CLK] < 99) && (pin[GPIO_TM16DIO] < 99) && (pin[GPIO_TM16STB] < 99)) {
tm1638_clock_pin = pin[GPIO_TM16CLK];
tm1638_data_pin = pin[GPIO_TM16DIO];
tm1638_strobe_pin = pin[GPIO_TM16STB];
pinMode(tm1638_data_pin, OUTPUT);
pinMode(tm1638_clock_pin, OUTPUT);
pinMode(tm1638_strobe_pin, OUTPUT);
digitalWrite(tm1638_strobe_pin, HIGH);
digitalWrite(tm1638_clock_pin, HIGH);
Tm16XXSendCommand(0x40);
Tm16XXSendCommand(0x80 | (tm1638_active_display ? 8 : 0) | tmin(7, tm1638_intensity));
digitalWrite(tm1638_strobe_pin, LOW);
Tm16XXSend(0xC0);
for (int i = 0; i < 16; i++) {
Tm16XXSend(0x00);
}
digitalWrite(tm1638_strobe_pin, HIGH);
tm1638_type = 1;
tm1638_state = 1;
}
}
void TmLoop()
{
if (tm1638_state) {
byte buttons = Tm1638GetButtons();
for (byte i = 0; i < MAX_SWITCHES; i++) {
virtualswitch[i] = (buttons &1) ^1;
byte color = (virtualswitch[i]) ? TM1638_COLOR_NONE : TM1638_COLOR_RED;
Tm1638SetLED(color, i);
buttons >>= 1;
}
SwitchHandler(1);
}
}
/*
void TmShow(boolean json)
{
if (tm1638_type) {
}
}
*/
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
boolean Xsns28(byte function)
{
boolean result = false;
if (tm1638_type) {
switch (function) {
case FUNC_INIT:
TmInit();
break;
case FUNC_EVERY_50_MSECOND:
TmLoop();
break;
/*
case FUNC_JSON_APPEND:
TmShow(1);
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_APPEND:
TmShow(0);
break;
#endif // USE_WEBSERVER
*/
}
}
return result;
}
#endif // USE_TM1638