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201 lines
5.2 KiB
201 lines
5.2 KiB
/*
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POWER ECH1560 MODULE
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Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if POWER_PROVIDER == POWER_PROVIDER_ECH1560
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// -----------------------------------------------------------------------------
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// MODULE GLOBALS AND CACHE
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// -----------------------------------------------------------------------------
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volatile long _ech1560_bits_count = 0;
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volatile long _ech1560_clk_count = 0;
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volatile bool _ech1560_dosync = false;
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volatile bool _ech1560_nextbit = true;
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double _ech1560_apparent = 0;
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double _ech1560_voltage = 0;
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double _ech1560_current = 0;
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// -----------------------------------------------------------------------------
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// HAL
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// -----------------------------------------------------------------------------
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void _ech1560_sync() {
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unsigned int byte1 = 0;
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unsigned int byte2 = 0;
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unsigned int byte3 = 0;
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_ech1560_bits_count = 0;
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while (_ech1560_bits_count < 40); // skip the uninteresting 5 first bytes
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_ech1560_bits_count = 0;
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while (_ech1560_bits_count < 24) { // loop through the next 3 Bytes (6-8) and save byte 6 and 7 in Ba and Bb
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if (_ech1560_nextbit) {
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if (_ech1560_bits_count < 9) { // first Byte/8 bits in Ba
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byte1 = byte1 << 1;
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if (digitalRead(ECH1560_MISO_PIN) == HIGH) byte1 |= 1;
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_ech1560_nextbit = false;
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} else if (_ech1560_bits_count < 17) { // bit 9-16 is byte 7, stor in Bb
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byte2 = byte2 << 1;
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if (digitalRead(ECH1560_MISO_PIN) == HIGH) byte2 |= 1;
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_ech1560_nextbit = false;
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}
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}
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}
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if (byte2 != 3) { // if bit Bb is not 3, we have reached the important part, U is allready in Ba and Bb and next 8 Bytes will give us the Power.
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// voltage = 2 * (Ba + Bb / 255)
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_ech1560_voltage = 2.0 * ((float) byte1 + (float) byte2 / 255.0);
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// power:
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_ech1560_bits_count = 0;
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while (_ech1560_bits_count < 40); // skip the uninteresting 5 first bytes
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_ech1560_bits_count = 0;
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byte1 = 0;
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byte2 = 0;
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byte3 = 0;
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while (_ech1560_bits_count < 24) { //store byte 6, 7 and 8 in Ba and Bb & Bc.
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if (_ech1560_nextbit) {
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if (_ech1560_bits_count < 9) {
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byte1 = byte1 << 1;
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if (digitalRead(ECH1560_MISO_PIN) == HIGH) byte1 |= 1;
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_ech1560_nextbit = false;
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} else if (_ech1560_bits_count < 17) {
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byte2 = byte2 << 1;
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if (digitalRead(ECH1560_MISO_PIN) == HIGH) byte2 |= 1;
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_ech1560_nextbit = false;
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} else {
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byte3 = byte3 << 1;
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if (digitalRead(ECH1560_MISO_PIN) == HIGH) byte3 |= 1;
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_ech1560_nextbit = false;
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}
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}
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}
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// power = (Ba*255+Bb+Bc/255)/2
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_ech1560_apparent = ( (float) byte1 * 255 + (float) byte2 + (float) byte3 / 255.0) / 2;
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_ech1560_current = _ech1560_apparent / _ech1560_voltage;
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_power_newdata = true;
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_ech1560_dosync = false;
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}
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// If Bb is not 3 or something else than 0, something is wrong!
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if (byte2 == 0) _ech1560_dosync = false;
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}
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void ICACHE_RAM_ATTR _ech1560_isr() {
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// if we are trying to find the sync-time (CLK goes high for 1-2ms)
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if (_ech1560_dosync == false) {
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_ech1560_clk_count = 0;
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// register how long the ClkHigh is high to evaluate if we are at the part wher clk goes high for 1-2 ms
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while (digitalRead(ECH1560_CLK_PIN) == HIGH) {
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_ech1560_clk_count += 1;
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delayMicroseconds(30); //can only use delayMicroseconds in an interrupt.
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}
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// if the Clk was high between 1 and 2 ms than, its a start of a SPI-transmission
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if (_ech1560_clk_count >= 33 && _ech1560_clk_count <= 67) {
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_ech1560_dosync = true;
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}
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// we are in sync and logging CLK-highs
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} else {
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// increment an integer to keep track of how many bits we have read.
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_ech1560_bits_count += 1;
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_ech1560_nextbit = true;
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}
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}
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// -----------------------------------------------------------------------------
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// POWER API
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// -----------------------------------------------------------------------------
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double _powerCurrent() {
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return _ech1560_current;
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}
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double _powerVoltage() {
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return _ech1560_voltage;
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}
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double _powerActivePower() {
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return 0;
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}
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double _powerApparentPower() {
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return _ech1560_apparent;
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}
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double _powerReactivePower() {
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return 0;
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}
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double _powerPowerFactor() {
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return 1;
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}
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void _powerEnabledProvider() {
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// Nothing to do
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}
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void _powerConfigureProvider() {
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// Nothing to do
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}
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void _powerCalibrateProvider(unsigned char magnitude, double value) {
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// Nothing to do
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}
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void _powerResetCalibrationProvider() {
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// Nothing to do
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}
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void _powerSetupProvider() {
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pinMode(ECH1560_CLK_PIN, INPUT);
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pinMode(ECH1560_MISO_PIN, INPUT);
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attachInterrupt(ECH1560_CLK_PIN, _ech1560_isr, RISING);
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}
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void _powerLoopProvider(bool before) {
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if (!before) {
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if (_ech1560_dosync) _ech1560_sync();
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}
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}
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#endif // POWER_PROVIDER & POWER_PROVIDER_EMON
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