PCF85063 RTC Chip Support (#22727)

* Create ST7701_480x480_WS_4inch.ini Display driver for 4inch display with ST7701 driver and GT911 touch driver including correct pinout and correct init process trought SPI. Used in WaveShare ESP32-S3-4inch display board. * Update xdrv_56_rtc_chips.ino Added support for PCF85063 RTC Chip. * Update my_user_config.h Added PCF85063 RTC support * Update I2CDEVICES.md Added PCF85063 RTC support
arendst · Dec 28, 2024 · 1ad89cc · 1ad89cc
1 parent de3a7f3
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diff --git a/I2CDEVICES.md b/I2CDEVICES.md
@@ -129,5 +129,6 @@ Index | Define              | Driver   | Device   | Address(es) | Bus2 | Descrip
   89  | USE_HX711_M5SCALES  | xsns_34  | M5SCALES  | 0x26       | Yes  | M5Unit (Mini)Scales(HX711 STM32) U177
   90  | USE_RX8010          | xdrv_56  | RX8010    | 0x32       | Yes  | RX8010 RTC from IOTTIMER
   91  | USE_MS5837          | xsns_116 | MS5837    | 0x76       |      | Pressure and temperature sensor
+  92  | USE_PCF85063        | xdrv_56  | PCF85063  | 0x51       |      | PCF85063 Real time clock
 
   NOTE: Bus2 supported on ESP32 only.
diff --git a/tasmota/my_user_config.h b/tasmota/my_user_config.h
@@ -769,6 +769,7 @@
 //    #define USE_BM8563                           // [I2cDriver59] Enable BM8563 RTC - used by M5Stack - support both I2C buses on ESP32 (I2C address 0x51) (+2.5k code)
 //    #define USE_PCF85363                         // [I2cDriver66] Enable PCF85363 RTC - used by Shelly 3EM (I2C address 0x51) (+0k7 code)
 //    #define USE_RX8010                           // [I2cDriver90] Enable RX8010 RTC - used by IOTTIMER - support both I2C buses on ESP32 (I2C address 0x32) (+0k7 code)
+//    #define USE_PCF85063                         // [I2cDriver92] Enable PCF85063 RTC support (I2C address 0x51)
 
 //  #define USE_DISPLAY                            // Add I2C/TM1637/MAX7219 Display Support (+2k code)
     #define USE_DISPLAY_MODES1TO5                // Enable display mode 1 to 5 in addition to mode 0

diff --git a/tasmota/tasmota_xdrv_driver/xdrv_56_rtc_chips.ino b/tasmota/tasmota_xdrv_driver/xdrv_56_rtc_chips.ino
@@ -185,6 +185,112 @@ void DS3231Detected(void) {
 }
 #endif  // USE_DS3231
 
+
+
+/*********************************************************************************************\
+ * PCF85063 support
+ *
+ * I2C Address: 0x51
+\*********************************************************************************************/
+#ifdef USE_PCF85063
+
+#define XI2C_92             92       // Unique ID for I2C device search
+
+#define PCF85063_ADDRESS    0x51     // PCF85063 I2C Address
+
+
+#define PCF85063_REG_CTRL1      0x00
+#define PCF85063_REG_CTRL2      0x01
+#define PCF85063_REG_OFFSET     0x02
+#define PCF85063_REG_SECONDS    0x04
+#define PCF85063_REG_MINUTES    0x05
+#define PCF85063_REG_HOURS      0x06
+#define PCF85063_REG_DAYS       0x07
+#define PCF85063_REG_WEEKDAYS   0x08
+#define PCF85063_REG_MONTHS     0x09
+#define PCF85063_REG_YEARS      0x0A
+
+
+uint32_t Pcf85063ReadTime(void) {
+  Wire.beginTransmission(RtcChip.address);
+  Wire.write(PCF85063_REG_SECONDS);
+  Wire.endTransmission(false);   // false -> repeated start
+  Wire.requestFrom((uint8_t)RtcChip.address, (uint8_t)7);
+
+  uint8_t sec   = Wire.read(); // 0x04
+  uint8_t min   = Wire.read(); // 0x05
+  uint8_t hour  = Wire.read(); // 0x06
+  uint8_t day   = Wire.read(); // 0x07
+  uint8_t wday  = Wire.read(); // 0x08
+  uint8_t month = Wire.read(); // 0x09
+  uint8_t year  = Wire.read(); // 0x0A
+
+  TIME_T tm;
+  tm.second       = Bcd2Dec(sec  & 0x7F); 
+  tm.minute       = Bcd2Dec(min  & 0x7F);
+  tm.hour         = Bcd2Dec(hour & 0x3F);
+  tm.day_of_month = Bcd2Dec(day  & 0x3F);
+  tm.day_of_week  = wday & 0x07; 
+  tm.month        = Bcd2Dec(month & 0x1F) -1; 
+  uint8_t y = Bcd2Dec(year);
+  tm.year = (y + 30);
+  return MakeTime(tm);
+}
+
+
+void Pcf85063SetTime(uint32_t epoch_time) {
+  TIME_T tm;
+  BreakTime(epoch_time, tm);
+
+
+  uint8_t year = (tm.year -30); 
+  if (year > 99) { year = 99; } 
+
+  uint8_t bcd_sec   = Dec2Bcd(tm.second);
+  uint8_t bcd_min   = Dec2Bcd(tm.minute);
+  uint8_t bcd_hour  = Dec2Bcd(tm.hour);
+  uint8_t bcd_day   = Dec2Bcd(tm.day_of_month);
+  uint8_t bcd_wday  = tm.day_of_week & 0x07;
+  uint8_t bcd_month = Dec2Bcd(tm.month +1);
+  uint8_t bcd_year  = Dec2Bcd(year);
+
+  Wire.beginTransmission(RtcChip.address);
+  Wire.write(PCF85063_REG_SECONDS);
+  Wire.write(bcd_sec);
+  Wire.write(bcd_min);
+  Wire.write(bcd_hour);
+  Wire.write(bcd_day);
+  Wire.write(bcd_wday);
+  Wire.write(bcd_month);
+  Wire.write(bcd_year);
+  Wire.endTransmission();
+}
+
+/*-------------------------------------------------------------------------------------------*\
+ * Detection
+\*-------------------------------------------------------------------------------------------*/
+void Pcf85063Detected(void) {
+  if (!RtcChip.detected && I2cEnabled(XI2C_92)) {
+    RtcChip.address = PCF85063_ADDRESS;
+    // Vyskúšame, či vieme prečítať nejaký register
+    if (I2cSetDevice(RtcChip.address)) {
+      // Skúsime napr. prečítať PCF85063_REG_CTRL1
+      if (I2cValidRead(RtcChip.address, PCF85063_REG_CTRL1, 1)) {
+        RtcChip.detected = 1;
+        strcpy_P(RtcChip.name, PSTR("PCF85063"));
+        RtcChip.ReadTime = &Pcf85063ReadTime;
+        RtcChip.SetTime  = &Pcf85063SetTime;
+        RtcChip.mem_size = -1;    // Nemá extra user RAM, ak by si nepotreboval
+
+        // Ak by si chcel implementovať MemRead/MemWrite, doplň RtcChip.MemRead a RtcChip.MemWrite
+      }
+    }
+  }
+}
+#endif // USE_PCF85063
+
+
+
 /*********************************************************************************************\
  * BM8563 - Real Time Clock
  *
@@ -500,6 +606,9 @@ void RtcChipDetect(void) {
 #ifdef USE_RX8010
   Rx8010Detected();
 #endif  // USE_RX8010
+#ifdef USE_PCF85063
+  Pcf85063Detected();
+#endif  // USE_PCF85063
 
   if (!RtcChip.detected) { return; }