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MHI-AC-Ctrl-core.cpp
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// MHI-AC-Ctrol-core
// implements the core functions (read & write SPI)
#include "MHI-AC-Ctrl-core.h"
uint16_t calc_checksum(byte* frame) {
uint16_t checksum = 0;
for (int i = 0; i < CBH; i++)
checksum += frame[i];
return checksum;
}
void MHI_AC_Ctrl_Core::reset_old_values() { // used e.g. when MQTT connection to broker is lost, to re-output data
// old status
status_power_old = 0xff;
status_mode_old = 0xff;
status_fan_old = 0xff;
status_vanes_old = 0xff;
status_troom_old = 0xfe;
status_tsetpoint_old = 0x00;
status_errorcode_old = 0xff;
// old operating data
op_kwh_old = 0xffff;
op_mode_old = 0xff;
op_settemp_old = 0xff;
op_return_air_old = 0xff;
op_iu_fanspeed_old = 0xff;
op_thi_r1_old = 0x00;
op_thi_r2_old = 0x00;
op_thi_r3_old = 0x00;
op_total_iu_run_old = 0;
op_outdoor_old = 0xff;
op_tho_r1_old = 0x00;
op_total_comp_run_old = 0;
op_ct_old = 0xff;
op_tdsh_old = 0xff;
op_protection_no_old = 0xff;
op_ou_fanspeed_old = 0xff;
op_defrost_old = 0x00;
op_comp_old = 0xffff;
op_td_old = 0x00;
op_ou_eev1_old = 0xffff;
}
void MHI_AC_Ctrl_Core::init() {
//MeasureFrequency(m_cbiStatus);
pinMode(SCK_PIN, INPUT);
pinMode(MOSI_PIN, INPUT);
pinMode(MISO_PIN, OUTPUT);
MHI_AC_Ctrl_Core::reset_old_values();
}
void MHI_AC_Ctrl_Core::set_power(boolean power) {
new_Power = 0b10 | power;
}
void MHI_AC_Ctrl_Core::set_mode(ACMode mode) {
new_Mode = 0b00100000 | mode;
}
void MHI_AC_Ctrl_Core::set_tsetpoint(uint tsetpoint) {
new_Tsetpoint = 0b10000000 | tsetpoint;
}
void MHI_AC_Ctrl_Core::set_fan(uint fan) {
new_Fan = 0b00001000 | fan;
}
void MHI_AC_Ctrl_Core::set_vanes(uint vanes) {
if (vanes == vanes_swing) {
new_Vanes0 = 0b11000000; // enable swing
}
else {
new_Vanes0 = 0b10000000; // disable swing
new_Vanes1 = 0b10000000 | ((vanes - 1) << 4);
}
}
void MHI_AC_Ctrl_Core::request_ErrOpData() {
request_erropData = true;
}
void MHI_AC_Ctrl_Core::set_troom(byte troom) {
//Serial.printf("MHI_AC_Ctrl_Core::set_troom %i\n", troom);
new_Troom = troom;
}
float MHI_AC_Ctrl_Core::get_troom_offset() {
return Troom_offset;
}
void MHI_AC_Ctrl_Core::set_troom_offset(float offset) {
Troom_offset = offset;
}
int MHI_AC_Ctrl_Core::loop(uint max_time_ms) {
const byte opdataCnt = sizeof(opdata) / sizeof(byte) / 2;
static byte opdataNo = 0; //
long startMillis = millis(); // start time of this loop run
byte MOSI_byte; // received MOSI byte
bool new_datapacket_received = false; // indicated that a new frame was received
static byte erropdataCnt = 0; // number of expected error operating data
static bool doubleframe = false;
static int frame = 1;
static byte MOSI_frame[20];
// sb0 sb1 sb2 db0 db1 db2 db3 db4 db5 db6 db7 db8 db9 db10 db11 db12 db13 db14 chkH chkL
static byte MISO_frame[] = { 0xA9, 0x00, 0x07, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x0f, 0x00, 0x00, 0x00 };
static uint call_counter = 0; // counts how often this loop was called
static unsigned long lastTroomInternalMillis = 0; // remember when Troom internal has changed
call_counter++;
int SCKMillis = millis(); // time of last SCK low level
while (millis() - SCKMillis < 5) { // wait for 5ms stable high signal to detect a frame start
if (!digitalRead(SCK_PIN))
SCKMillis = millis();
if (millis() - startMillis > max_time_ms)
return err_msg_timeout_SCK_low; // SCK stuck@ low error detection
}
// build the next MISO frame
doubleframe = !doubleframe; // toggle every frame
MISO_frame[DB14] = doubleframe << 2; // MISO_frame[DB14] bit2 toggles with every frame
// Requesting all different opdata's is an opdata cycle. A cycle will take 20s.
// With the current 20 different opdata's, every opdata request will take 1sec (interval).
// If there are only 5 different opdata's defined, these 5 will be spread about the 20s cycle. The interval will increase.
// requesting a new opdata will always start at a doubleframe start
if ((frame > (NoFramesPerOpDataCycle / opdataCnt)) && doubleframe ) { // interval for requesting new opdata depending on de number of opdata requests
frame = 1; // start requesting new OpData
}
if (frame++ <= 2) { // use opdata request only for 2 subsequent frames
if (doubleframe) { // start when MISO_frame[DB14] bit2 is set
if (erropdataCnt == 0) {
MISO_frame[DB6] = pgm_read_word(opdata + opdataNo);
MISO_frame[DB9] = pgm_read_word(opdata + opdataNo) >> 8;
opdataNo = (opdataNo + 1) % opdataCnt;
}
}
}
else // reset OpData request
{
MISO_frame[DB6] = 0x80;
MISO_frame[DB9] = 0xff;
}
if (doubleframe) { // and the other MISO data changes are updated when MISO_frame[DB14] bit2 is set
MISO_frame[DB0] = 0x00;
MISO_frame[DB1] = 0x00;
MISO_frame[DB2] = 0x00;
if (erropdataCnt > 0) { // error operating data available
MISO_frame[DB6] = 0x80;
MISO_frame[DB9] = 0xff;
erropdataCnt--;
}
// set Power, Mode, Tsetpoint, Fan, Vanes
MISO_frame[DB0] = new_Power;
new_Power = 0;
MISO_frame[DB0] |= new_Mode;
new_Mode = 0;
MISO_frame[DB2] = new_Tsetpoint;
new_Tsetpoint = 0;
MISO_frame[DB1] = new_Fan;
new_Fan = 0;
MISO_frame[DB0] |= new_Vanes0;
MISO_frame[DB1] |= new_Vanes1;
new_Vanes0 = 0;
new_Vanes1 = 0;
if (request_erropData) {
MISO_frame[DB6] = 0x80;
MISO_frame[DB9] = 0x45;
request_erropData = false;
}
}
MISO_frame[DB3] = new_Troom; // from MQTT or DS18x20
uint16_t checksum = calc_checksum(MISO_frame);
MISO_frame[CBH] = highByte(checksum);
MISO_frame[CBL] = lowByte(checksum);
//Serial.println();
//Serial.print(F("MISO:"));
// read/write MOSI/MISO frame
for (uint8_t byte_cnt = 0; byte_cnt < sizeof(MOSI_frame); byte_cnt++) { // read and write a data packet of 20 bytes
//Serial.printf("x%02x ", MISO_frame[byte_cnt]);
MOSI_byte = 0;
byte bit_mask = 1;
for (uint8_t bit_cnt = 0; bit_cnt < 8; bit_cnt++) { // read and write 1 byte
SCKMillis = millis();
while (digitalRead(SCK_PIN)) { // wait for falling edge
if (millis() - startMillis > max_time_ms)
return err_msg_timeout_SCK_high; // SCK stuck@ high error detection
}
if ((MISO_frame[byte_cnt] & bit_mask) > 0)
digitalWrite(MISO_PIN, 1);
else
digitalWrite(MISO_PIN, 0);
while (!digitalRead(SCK_PIN)) {} // wait for rising edge
if (digitalRead(MOSI_PIN))
MOSI_byte += bit_mask;
bit_mask = bit_mask << 1;
}
if (MOSI_frame[byte_cnt] != MOSI_byte) {
new_datapacket_received = true;
MOSI_frame[byte_cnt] = MOSI_byte;
}
}
checksum = calc_checksum(MOSI_frame);
if (((MOSI_frame[SB0] & 0xfe) != 0x6c) | (MOSI_frame[SB1] != 0x80) | (MOSI_frame[SB2] != 0x04))
return err_msg_invalid_signature;
if ((MOSI_frame[CBH] << 8 | MOSI_frame[CBL]) != checksum)
return err_msg_invalid_checksum;
if (new_datapacket_received) {
// evaluate status
if ((MOSI_frame[DB0] & 0x1c) != status_mode_old) { // Mode
status_mode_old = MOSI_frame[DB0] & 0x1c;
m_cbiStatus->cbiStatusFunction(status_mode, status_mode_old);
}
if ((MOSI_frame[DB0] & 0x01) != status_power_old) { // Power
status_power_old = MOSI_frame[DB0] & 0x01;
m_cbiStatus->cbiStatusFunction(status_power, status_power_old);
}
uint fantmp = MOSI_frame[DB1] & 0x07;
if (fantmp != status_fan_old) {
status_fan_old = fantmp;
m_cbiStatus->cbiStatusFunction(status_fan, status_fan_old);
}
// Only updated when Vanes command via wired RC
uint vanestmp = (MOSI_frame[DB0] & 0xc0) + ((MOSI_frame[DB1] & 0xB0) >> 4);
if (vanestmp != status_vanes_old) {
if ((vanestmp & 0x88) == 0) // last vanes update was via IR-RC, so status is not known
m_cbiStatus->cbiStatusFunction(status_vanes, vanes_unknown);
else if ((vanestmp & 0x40) != 0) // Vanes status swing
m_cbiStatus->cbiStatusFunction(status_vanes, vanes_swing);
else {
m_cbiStatus->cbiStatusFunction(status_vanes, (vanestmp & 0x03) + 1);
}
status_vanes_old = vanestmp;
}
if(MOSI_frame[DB3] != status_troom_old) {
// To avoid jitter with the fast changing AC internal temperature sensor
if (MISO_frame[DB3] != 0xff) { // not internal sensor used, just publish
status_troom_old = MOSI_frame[DB3];
m_cbiStatus->cbiStatusFunction(status_troom, status_troom_old);
lastTroomInternalMillis = 0;
}
else // internal sensor used
if ((unsigned long)(millis() - lastTroomInternalMillis) > minTimeInternalTroom) { // Only publish when last change was more then minTimeInternalTroom ago
lastTroomInternalMillis = millis();
status_troom_old = MOSI_frame[DB3];
m_cbiStatus->cbiStatusFunction(status_troom, status_troom_old);
}
}
if (MOSI_frame[DB2] != status_tsetpoint_old) { // Temperature setpoint
status_tsetpoint_old = MOSI_frame[DB2];
m_cbiStatus->cbiStatusFunction(status_tsetpoint, status_tsetpoint_old);
}
if (MOSI_frame[DB4] != status_errorcode_old) { // error code
status_errorcode_old = MOSI_frame[DB4];
m_cbiStatus->cbiStatusFunction(status_errorcode, status_errorcode_old);
}
// Evaluate Operating Data and Error Operating Data
bool MOSI_type_opdata = (MOSI_frame[DB10] & 0x30) == 0x10;
switch (MOSI_frame[DB9]) {
case 0x94: // 0 energy-kwh n * 0.25 kWh used since power on
if ((MOSI_frame[DB6] & 0x80) != 0) { //
if (MOSI_type_opdata) {
if (((MOSI_frame[DB12]<<8)+(MOSI_frame[DB11])) != op_kwh_old) {
op_kwh_old = (MOSI_frame[DB12]<<8)+(MOSI_frame[DB11]);
m_cbiStatus->cbiStatusFunction(opdata_kwh, op_kwh_old);
}
}
//else
// m_cbiStatus->cbiStatusFunction(erropdata_unknown, op_unknown_old); // noch nie gesehen, dass es auftaucht
}
break;
case 0x02:
if ((MOSI_frame[DB6] & 0x80) != 0) { // 1 MODE
if (MOSI_type_opdata) {
if ((MOSI_frame[DB10] != op_mode_old)) {
op_mode_old = MOSI_frame[DB10];
m_cbiStatus->cbiStatusFunction(opdata_mode, (op_mode_old & 0x0f) << 2);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_mode, (MOSI_frame[DB10] & 0x0f) << 2);
}
break;
case 0x05:
if ((MOSI_frame[DB6] & 0x80) != 0) { // 2 SET-TEMP
if (MOSI_frame[DB10] == 0x13) {
if (MOSI_frame[DB11] != op_settemp_old) {
op_settemp_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_tsetpoint, op_settemp_old);
}
}
else if (MOSI_frame[DB10] == 0x33)
m_cbiStatus->cbiStatusFunction(erropdata_tsetpoint, MOSI_frame[DB11]);
}
break;
case 0x81: // 5 THI-R1 or 6 THI-R2
if ((MOSI_frame[DB6] & 0x80) != 0) { // 5 THI-R1
if ((MOSI_frame[DB10] & 0x30) == 0x20) {
if (MOSI_frame[DB11] != op_thi_r1_old) {
op_thi_r1_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_thi_r1, op_thi_r1_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_thi_r1, MOSI_frame[DB11]);
}
else { // 6 THI-R2
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_thi_r2_old) {
op_thi_r2_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_thi_r2, op_thi_r2_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_thi_r2, MOSI_frame[DB11]);
}
break;
case 0x87:
if ((MOSI_frame[DB6] & 0x80) != 0) { // 7 THI-R3
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_thi_r3_old) {
op_thi_r3_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_thi_r3, op_thi_r3_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_thi_r3, MOSI_frame[DB11]);
}
break;
case 0x80: // 3 RETURN-AIR or 21 OUTDOOR
if ((MOSI_frame[DB6] & 0x80) != 0) { // 3 RETURN-AIR
if ((MOSI_frame[DB10] & 0x30) == 0x20) { // operating Data
if (MOSI_frame[DB11] != op_return_air_old) {
op_return_air_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_return_air, op_return_air_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_return_air, MOSI_frame[DB11]);
}
else { // 21 OUTDOOR
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_outdoor_old) {
op_outdoor_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_outdoor, op_outdoor_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_outdoor, MOSI_frame[DB11]);
}
break;
case 0x1f: // 8 IU-FANSPEED or 34 OU-FANSPEED
if ((MOSI_frame[DB6] & 0x80) != 0) { // 8 IU-FANSPEED
if (MOSI_type_opdata) {
if (MOSI_frame[DB10] != op_iu_fanspeed_old) {
op_iu_fanspeed_old = MOSI_frame[DB10];
m_cbiStatus->cbiStatusFunction(opdata_iu_fanspeed, op_iu_fanspeed_old & 0x0f);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_iu_fanspeed, MOSI_frame[DB10] & 0x0f);
}
else { // 34 OU-FANSPEED
if (MOSI_type_opdata) {
if (MOSI_frame[DB10] != op_ou_fanspeed_old) {
op_ou_fanspeed_old = MOSI_frame[DB10];
m_cbiStatus->cbiStatusFunction(opdata_ou_fanspeed, op_ou_fanspeed_old & 0x0f);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_ou_fanspeed, MOSI_frame[DB10] & 0x0f);
}
break;
case 0x1e: // 12 TOTAL-IU-RUN or 37 TOTAL-COMP-RUN
if ((MOSI_frame[DB6] & 0x80) != 0) { // 12 TOTAL-IU-RUN
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_total_iu_run_old) {
op_total_iu_run_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_total_iu_run, op_total_iu_run_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_total_iu_run, MOSI_frame[DB11]);
}
else { // 37 TOTAL-COMP-RUN
if (MOSI_frame[DB10] == 0x11) {
if (MOSI_frame[DB11] != op_total_comp_run_old) {
op_total_comp_run_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_total_comp_run, op_total_comp_run_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_total_comp_run, MOSI_frame[DB11]);
}
break;
case 0x82:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 22 ThO-R1
if (MOSI_type_opdata) { // operating data
if (MOSI_frame[DB11] != op_tho_r1_old) {
op_tho_r1_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_tho_r1, op_tho_r1_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_tho_r1, MOSI_frame[DB11]);
}
break;
case 0x11:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 24 COMP
if (MOSI_type_opdata) {
if ((MOSI_frame[DB10] << 8 | MOSI_frame[DB11]) != op_comp_old) {
op_comp_old = MOSI_frame[DB10] << 8 | MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_comp, op_comp_old & 0x0fff);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_comp, (MOSI_frame[DB10] << 8 | MOSI_frame[DB11]) & 0x0fff);
}
break;
case 0x85:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 27 Td
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_td_old) {
op_td_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_td, op_td_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_td, MOSI_frame[DB11]);
}
break;
case 0x90:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 29 CT
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_ct_old) {
op_ct_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_ct, op_ct_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_ct, MOSI_frame[DB11]);
}
break;
case 0xb1:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 32 TDSH
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_tdsh_old) {
op_tdsh_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_tdsh, op_tdsh_old / 2);
}
}
}
break;
case 0x7c:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 33 PROTECTION-No
if (MOSI_type_opdata) {
if (MOSI_frame[DB11] != op_protection_no_old) {
op_protection_no_old = MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_protection_no, op_protection_no_old);
}
}
}
break;
case 0x0c:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 36 DEFROST
if (MOSI_type_opdata) {
if (MOSI_frame[DB10] != op_defrost_old) {
op_defrost_old = MOSI_frame[DB10];
m_cbiStatus->cbiStatusFunction(opdata_defrost, op_defrost_old & 0b1);
}
}
}
break;
case 0x13:
if ((MOSI_frame[DB6] & 0x80) == 0) { // 38 OU-EEV
if (MOSI_type_opdata) {
if ((MOSI_frame[DB12] << 8 | MOSI_frame[DB11]) != op_ou_eev1_old) {
op_ou_eev1_old = MOSI_frame[DB12] << 8 | MOSI_frame[DB11];
m_cbiStatus->cbiStatusFunction(opdata_ou_eev1, op_ou_eev1_old);
}
}
else
m_cbiStatus->cbiStatusFunction(erropdata_ou_eev1, MOSI_frame[DB12] << 8 | MOSI_frame[DB11]);
}
break;
case 0x45: // last error number or count of following error operating data
if ((MOSI_frame[DB6] & 0x80) != 0) {
if (MOSI_frame[DB10] == 0x11) { // last error number
m_cbiStatus->cbiStatusFunction(erropdata_errorcode, MOSI_frame[DB11]);
}
else if (MOSI_frame[DB10] == 0x12) { // count of following error operating data
erropdataCnt = MOSI_frame[DB11] + 4;
}
}
break;
case 0x00: // dummy
break;
case 0xff: // default
break;
default: // unknown operating data
m_cbiStatus->cbiStatusFunction(opdata_unknown, MOSI_frame[DB10] << 8 | MOSI_frame[DB9]);
Serial.printf("Unknown operating data, MOSI_frame[DB9]=%i MOSI_frame[D10]=%i\n", MOSI_frame[DB9], MOSI_frame[DB10]);
}
}
return call_counter;
}