mirror of https://github.com/arendst/Tasmota.git
251 lines
8.8 KiB
C++
251 lines
8.8 KiB
C++
/*
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xdrv_28_pcf8574.ino - PCF8574 I2C support for Tasmota
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Copyright (C) 2019 Stefan Bode
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_I2C
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#ifdef USE_PCF8574
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/*********************************************************************************************\
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* PCF8574 - I2C IO Expander
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*
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* I2C Address: PCF8574 = 0x20 .. 0x27 (0x27 is not supported),
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* PCF8574A = 0x39 .. 0x3F (0x38 is not supported)
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\*********************************************************************************************/
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#define XDRV_28 28
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#define XI2C_02 2 // See I2CDEVICES.md
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#define PCF8574_ADDR1 0x20 // PCF8574
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#define PCF8574_ADDR2 0x38 // PCF8574A
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struct PCF8574 {
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int error;
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uint8_t pin[64];
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uint8_t address[MAX_PCF8574];
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uint8_t pin_mask[MAX_PCF8574] = { 0 };
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uint8_t max_connected_ports = 0; // Max numbers of devices comming from PCF8574 modules
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uint8_t max_devices = 0; // Max numbers of PCF8574 modules
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char stype[9];
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bool type = false;
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} Pcf8574;
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void Pcf8574SwitchRelay(void)
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{
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for (uint32_t i = 0; i < devices_present; i++) {
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uint8_t relay_state = bitRead(XdrvMailbox.index, i);
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//AddLog_P2(LOG_LEVEL_DEBUG, PSTR("PCF: Pcf8574.max_devices %d requested pin %d"), Pcf8574.max_devices,Pcf8574.pin[i]);
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if (Pcf8574.max_devices > 0 && Pcf8574.pin[i] < 99) {
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uint8_t board = Pcf8574.pin[i]>>3;
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uint8_t oldpinmask = Pcf8574.pin_mask[board];
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uint8_t _val = bitRead(rel_inverted, i) ? !relay_state : relay_state;
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//AddLog_P2(LOG_LEVEL_DEBUG, PSTR("PCF: Pcf8574SwitchRelay %d on pin %d"), i,state);
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if (_val) {
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Pcf8574.pin_mask[board] |= _val << (Pcf8574.pin[i]&0x7);
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} else {
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Pcf8574.pin_mask[board] &= ~(1 << (Pcf8574.pin[i]&0x7));
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}
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if (oldpinmask != Pcf8574.pin_mask[board]) {
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Wire.beginTransmission(Pcf8574.address[board]);
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Wire.write(Pcf8574.pin_mask[board]);
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Pcf8574.error = Wire.endTransmission();
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}
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//pcf8574.write(Pcf8574.pin[i]&0x7, rel_inverted[i] ? !state : state);
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}
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}
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}
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void Pcf8574Init()
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{
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uint8_t pcf8574_address = PCF8574_ADDR1;
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while ((Pcf8574.max_devices < MAX_PCF8574) && (pcf8574_address < PCF8574_ADDR2 +8)) {
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("PCF: Probing addr: 0x%x for PCF8574"), pcf8574_address);
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if (I2cSetDevice(pcf8574_address)) {
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Pcf8574.type = true;
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Pcf8574.address[Pcf8574.max_devices] = pcf8574_address;
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Pcf8574.max_devices++;
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strcpy(Pcf8574.stype, "PCF8574");
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if (pcf8574_address >= PCF8574_ADDR2) {
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strcpy(Pcf8574.stype, "PCF8574A");
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}
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I2cSetActiveFound(pcf8574_address, Pcf8574.stype);
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}
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pcf8574_address++;
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if ((PCF8574_ADDR1 +7) == pcf8574_address) { // Support I2C addresses 0x20 to 0x26 and 0x39 to 0x3F
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pcf8574_address = PCF8574_ADDR2 +1;
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}
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}
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if (Pcf8574.type) {
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for (uint32_t i = 0; i < sizeof(Pcf8574.pin); i++) {
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Pcf8574.pin[i] = 99;
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}
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devices_present = devices_present - Pcf8574.max_connected_ports; // reset no of devices to avoid duplicate ports on duplicate init.
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Pcf8574.max_connected_ports = 0; // reset no of devices to avoid duplicate ports on duplicate init.
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for (uint32_t idx = 0; idx < Pcf8574.max_devices; idx++) { // suport up to 8 boards PCF8574
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AddLog_P2(LOG_LEVEL_DEBUG, PSTR("PCF: Device %d config 0x%02x"), idx +1, Settings.pcf8574_config[idx]);
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for (uint32_t i = 0; i < 8; i++) {
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uint8_t _result = Settings.pcf8574_config[idx] >> i &1;
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//AddLog_P2(LOG_LEVEL_DEBUG, PSTR("PCF: I2C shift i %d: %d. Powerstate: %d, devices_present: %d"), i,_result, Settings.power>>i&1, devices_present);
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if (_result > 0) {
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Pcf8574.pin[devices_present] = i + 8 * idx;
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bitWrite(rel_inverted, devices_present, Settings.flag3.pcf8574_ports_inverted); // SetOption81 - Invert all ports on PCF8574 devices
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devices_present++;
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Pcf8574.max_connected_ports++;
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}
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}
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}
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AddLog_P2(LOG_LEVEL_INFO, PSTR("PCF: Total devices %d, PCF8574 output ports %d"), Pcf8574.max_devices, Pcf8574.max_connected_ports);
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}
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}
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/*********************************************************************************************\
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* Presentation
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\*********************************************************************************************/
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#ifdef USE_WEBSERVER
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#define WEB_HANDLE_PCF8574 "pcf"
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const char HTTP_BTN_MENU_PCF8574[] PROGMEM =
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"<p><form action='" WEB_HANDLE_PCF8574 "' method='get'><button>" D_CONFIGURE_PCF8574 "</button></form></p>";
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const char HTTP_FORM_I2C_PCF8574_1[] PROGMEM =
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"<fieldset><legend><b> " D_PCF8574_PARAMETERS " </b></legend>"
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"<form method='get' action='" WEB_HANDLE_PCF8574 "'>"
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"<p><input id='b1' name='b1' type='checkbox'%s><b>" D_INVERT_PORTS "</b></p><hr/>";
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const char HTTP_FORM_I2C_PCF8574_2[] PROGMEM =
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"<tr><td><b>" D_DEVICE " %d " D_PORT " %d</b></td><td style='width:100px'><select id='i2cs%d' name='i2cs%d'>"
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"<option%s value='0'>" D_DEVICE_INPUT "</option>"
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"<option%s value='1'>" D_DEVICE_OUTPUT "</option>"
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"</select></td></tr>";
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void HandlePcf8574(void)
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{
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if (!HttpCheckPriviledgedAccess()) { return; }
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AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_HTTP D_CONFIGURE_PCF8574));
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if (WebServer->hasArg("save")) {
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Pcf8574SaveSettings();
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WebRestart(1);
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return;
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}
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WSContentStart_P(D_CONFIGURE_PCF8574);
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WSContentSendStyle();
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WSContentSend_P(HTTP_FORM_I2C_PCF8574_1, (Settings.flag3.pcf8574_ports_inverted) ? " checked" : ""); // SetOption81 - Invert all ports on PCF8574 devices
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WSContentSend_P(HTTP_TABLE100);
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for (uint32_t idx = 0; idx < Pcf8574.max_devices; idx++) {
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for (uint32_t idx2 = 0; idx2 < 8; idx2++) { // 8 ports on PCF8574
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uint8_t helper = 1 << idx2;
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WSContentSend_P(HTTP_FORM_I2C_PCF8574_2,
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idx +1, idx2,
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idx2 + 8*idx,
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idx2 + 8*idx,
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((helper & Settings.pcf8574_config[idx]) >> idx2 == 0) ? " selected " : " ",
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((helper & Settings.pcf8574_config[idx]) >> idx2 == 1) ? " selected " : " "
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);
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}
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}
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WSContentSend_P(PSTR("</table>"));
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WSContentSend_P(HTTP_FORM_END);
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WSContentSpaceButton(BUTTON_CONFIGURATION);
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WSContentStop();
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}
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void Pcf8574SaveSettings()
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{
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char stemp[7];
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char tmp[100];
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//AddLog_P(LOG_LEVEL_DEBUG, PSTR("PCF: Start working on Save arguements: inverted:%d")), WebServer->hasArg("b1");
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Settings.flag3.pcf8574_ports_inverted = WebServer->hasArg("b1"); // SetOption81 - Invert all ports on PCF8574 devices
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for (byte idx = 0; idx < Pcf8574.max_devices; idx++) {
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byte count=0;
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byte n = Settings.pcf8574_config[idx];
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while(n!=0) {
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n = n&(n-1);
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count++;
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}
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if (count <= devices_present) {
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devices_present = devices_present - count;
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}
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for (byte i = 0; i < 8; i++) {
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snprintf_P(stemp, sizeof(stemp), PSTR("i2cs%d"), i+8*idx);
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WebGetArg(stemp, tmp, sizeof(tmp));
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byte _value = (!strlen(tmp)) ? 0 : atoi(tmp);
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if (_value) {
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Settings.pcf8574_config[idx] = Settings.pcf8574_config[idx] | 1 << i;
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devices_present++;
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Pcf8574.max_connected_ports++;
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} else {
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Settings.pcf8574_config[idx] = Settings.pcf8574_config[idx] & ~(1 << i );
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}
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}
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//Settings.pcf8574_config[0] = (!strlen(webServer->arg("i2cs0").c_str())) ? 0 : atoi(webServer->arg("i2cs0").c_str());
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//AddLog_P2(LOG_LEVEL_INFO, PSTR("PCF: I2C Board: %d, Config: %2x")), idx, Settings.pcf8574_config[idx];
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}
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}
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#endif // USE_WEBSERVER
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xdrv28(uint8_t function)
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{
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if (!I2cEnabled(XI2C_02)) { return false; }
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bool result = false;
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if (FUNC_PRE_INIT == function) {
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Pcf8574Init();
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}
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else if (Pcf8574.type) {
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switch (function) {
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case FUNC_SET_POWER:
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Pcf8574SwitchRelay();
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_ADD_BUTTON:
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WSContentSend_P(HTTP_BTN_MENU_PCF8574);
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break;
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case FUNC_WEB_ADD_HANDLER:
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WebServer->on("/" WEB_HANDLE_PCF8574, HandlePcf8574);
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break;
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#endif // USE_WEBSERVER
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}
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}
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return result;
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}
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#endif // USE_PCF8574
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#endif // USE_I2C
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