wifi-tally_Oostendam/nodemcu-firmware/app/modules/rfswitch.c

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2021-09-27 19:52:27 +00:00
/*
* https://github.com/ffedoroff/nodemcu-firmware contributed by Roman Fedorov
*
* Module for operate 433/315Mhz devices like power outlet sockets, relays, etc.
* This will most likely work with all popular low cost power outlet sockets
* with a SC5262 / SC5272, HX2262 / HX2272, PT2262 / PT2272, EV1527,
* RT1527, FP1527 or HS1527 chipset.
*
* This module using some code from original rc-switch arduino lib
* https://github.com/sui77/rc-switch/ but unfortunatelly NodeMCU and Arduino
* are not fully compatable, and it cause for full rewrite rc-switch lib into new rfswitch lib.
*/
#include "module.h"
#include "lauxlib.h"
#include "platform.h"
#include "user_interface.h"
typedef struct HighLow {
uint8_t high;
uint8_t low;
} HighLow;
typedef struct Protocol {
int pulseLength;
HighLow syncFactor;
HighLow zero;
HighLow one;
/** @brief if true inverts the high and low logic levels in the HighLow structs */
bool invertedSignal;
} Protocol;
/* Format for protocol definitions:
* {pulselength, Sync bit, "0" bit, "1" bit}
*
* pulselength: pulse length in microseconds, e.g. 350
* Sync bit: {1, 31} means 1 high pulse and 31 low pulses
* (perceived as a 31*pulselength long pulse, total length of sync bit is
* 32*pulselength microseconds), i.e:
* _
* | |_______________________________ (don't count the vertical bars)
* "0" bit: waveform for a data bit of value "0", {1, 3} means 1 high pulse
* and 3 low pulses, total length (1+3)*pulselength, i.e:
* _
* | |___
* "1" bit: waveform for a data bit of value "1", e.g. {3,1}:
* ___
* | |_
*
* These are combined to form Tri-State bits when sending or receiving codes.
*/
static const Protocol proto[] = {
{ 350, { 1, 31 }, { 1, 3 }, { 3, 1 }, false }, // protocol 1
{ 650, { 1, 10 }, { 1, 2 }, { 2, 1 }, false }, // protocol 2
{ 100, { 30, 71 }, { 4, 11 }, { 9, 6 }, false }, // protocol 3
{ 380, { 1, 6 }, { 1, 3 }, { 3, 1 }, false }, // protocol 4
{ 500, { 6, 14 }, { 1, 2 }, { 2, 1 }, false }, // protocol 5
{ 450, { 23, 1 }, { 1, 2 }, { 2, 1 }, true } // protocol 6 (HT6P20B)
};
/**
* Transmit a single high-low pulse.
*/
void transmit(HighLow pulses, bool invertedSignal, int pulseLength, int pin) {
platform_gpio_write(pin, !invertedSignal);
os_delay_us(pulseLength * pulses.high);
platform_gpio_write(pin, invertedSignal);
os_delay_us(pulseLength * pulses.low);
}
/**
* Transmit the first 'length' bits of the integer 'code'. The
* bits are sent from MSB to LSB, i.e., first the bit at position length-1,
* then the bit at position length-2, and so on, till finally the bit at position 0.
*/
void send(unsigned long protocol_id, unsigned long pulse_length, unsigned long repeat, unsigned long pin, unsigned long value, unsigned int length) {
platform_gpio_mode(pin, PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT);
Protocol p = proto[protocol_id-1];
for (int nRepeat = 0; nRepeat < repeat; nRepeat++) {
for (int i = length-1; i >= 0; i--) {
if (value & (1L << i))
transmit(p.one, p.invertedSignal, pulse_length, pin);
else
transmit(p.zero, p.invertedSignal, pulse_length, pin);
}
transmit(p.syncFactor, p.invertedSignal, pulse_length, pin);
}
}
static int rfswitch_send( lua_State *L )
{
unsigned int protocol_id = luaL_checkinteger( L, 1 );
unsigned int pulse_length = luaL_checkinteger( L, 2 );
unsigned int repeat = luaL_checkinteger( L, 3 );
unsigned int pin = luaL_checkinteger( L, 4 );
unsigned long value = luaL_checkinteger( L, 5 );
unsigned long length = luaL_checkinteger( L, 6 );
send(protocol_id, pulse_length, repeat, pin, value, length);
return 0;
}
// Module function map
LROT_BEGIN(rfswitch, NULL, 0)
LROT_FUNCENTRY( send, rfswitch_send )
LROT_END(rfswitch, NULL, 0)
NODEMCU_MODULE(RFSWITCH, "rfswitch", rfswitch, NULL);