M5unitLCD for ESP32 I2C2 issue

[NathanKuo0821]

Hi All,

I have defined two I2Cs in ESP32 to control M5UnitLCD. Now there is a problem, when i use I2C1 to control LCD everything works fine, but when i switch to I2C2, I2C error occurs, and i use gpio 15/16 or 32/33 to control I2C1 without problem, but I2C2 LCD has problems , can anyone help? Thansk

ERROR LOG: [D][esp32-hal-i2c.c:1344] i2cProcQueue(): Busy Timeout start=0xd7, end=0x10 9, =50, max=50 error=1 [E][esp32-hal-i2c.c:318] i2cDumpI2c(): i2c=0x3ffbe218 [I][esp32-hal-i2c.c:319] i2cDumpI2c(): dev=0x60027000 date=0x16042000 [I][esp32-hal-i2c.c:321] i2cDumpI2c(): lock=0x3ffb8b00 [I][esp32-hal-i2c.c:323] i2cDumpI2c(): num=1 [I][esp32-hal-i2c.c:324] i2cDumpI2c(): mode=1 [I][esp32-hal-i2c.c:325] i2cDumpI2c(): stage=3 [I][esp32-hal-i2c.c:326] i2cDumpI2c(): error=1 [I][esp32-hal-i2c.c:327] i2cDumpI2c(): event=0x3ffb8b88 bits=0 [I][esp32-hal-i2c.c:328] i2cDumpI2c(): intr_handle=0x3ffb8bbc [I][esp32-hal-i2c.c:329] i2cDumpI2c(): dq=0x3ffb8b64 [I][esp32-hal-i2c.c:330] i2cDumpI2c(): queueCount=1 [I][esp32-hal-i2c.c:331] i2cDumpI2c(): queuePos=0 [I][esp32-hal-i2c.c:332] i2cDumpI2c(): errorByteCnt=0 [I][esp32-hal-i2c.c:333] i2cDumpI2c(): errorQueue=0 [I][esp32-hal-i2c.c:334] i2cDumpI2c(): debugFlags=0x00000000 [I][esp32-hal-i2c.c:311] i2cDumpDqData(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:354] i2cDumpInts(): Debug Buffer not Enabled [D][esp32-hal-i2c.c:1353] i2cProcQueue(): Gross Timeout Dead start=0x15a, e nd=0x18c, =50, max=50 error=1 [E][esp32-hal-i2c.c:318] i2cDumpI2c(): i2c=0x3ffbe218 [I][esp32-hal-i2c.c:319] i2cDumpI2c(): dev=0x60027000 date=0x16042000 [I][esp32-hal-i2c.c:321] i2cDumpI2c(): lock=0x3ffb8b00 [I][esp32-hal-i2c.c:323] i2cDumpI2c(): num=1 [I][esp32-hal-i2c.c:324] i2cDumpI2c(): mode=1 [I][esp32-hal-i2c.c:325] i2cDumpI2c(): stage=3 [I][esp32-hal-i2c.c:326] i2cDumpI2c(): error=1 [I][esp32-hal-i2c.c:327] i2cDumpI2c(): event=0x3ffb8b88 bits=0 [I][esp32-hal-i2c.c:328] i2cDumpI2c(): intr_handle=0x3ffb8bbc [I][esp32-hal-i2c.c:329] i2cDumpI2c(): dq=0x3ffb8b64 [I][esp32-hal-i2c.c:330] i2cDumpI2c(): queueCount=1 [I][esp32-hal-i2c.c:331] i2cDumpI2c(): queuePos=0 [I][esp32-hal-i2c.c:332] i2cDumpI2c(): errorByteCnt=0 [I][esp32-hal-i2c.c:333] i2cDumpI2c(): errorQueue=1 [I][esp32-hal-i2c.c:334] i2cDumpI2c(): debugFlags=0x00000000 [I][esp32-hal-i2c.c:311] i2cDumpDqData(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:354] i2cDumpInts(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:1138] i2cProcQueue(): Bus busy, reinit [E][common.cpp:939] writeBytes(): i2c write error : ack wait [D][esp32-hal-i2c.c:1344] i2cProcQueue(): Busy Timeout start=0x1f8, end=0x2 2a, =50, max=50 error=1 [E][esp32-hal-i2c.c:318] i2cDumpI2c(): i2c=0x3ffbe218 [I][esp32-hal-i2c.c:319] i2cDumpI2c(): dev=0x60027000 date=0x16042000 [I][esp32-hal-i2c.c:321] i2cDumpI2c(): lock=0x3ffb8b00 [I][esp32-hal-i2c.c:323] i2cDumpI2c(): num=1 [I][esp32-hal-i2c.c:324] i2cDumpI2c(): mode=1 [I][esp32-hal-i2c.c:325] i2cDumpI2c(): stage=3 [I][esp32-hal-i2c.c:326] i2cDumpI2c(): error=1 [I][esp32-hal-i2c.c:327] i2cDumpI2c(): event=0x3ffb8b88 bits=0 [I][esp32-hal-i2c.c:328] i2cDumpI2c(): intr_handle=0x3ffb8bbc [I][esp32-hal-i2c.c:329] i2cDumpI2c(): dq=0x3ffb8b64 [I][esp32-hal-i2c.c:330] i2cDumpI2c(): queueCount=1 [I][esp32-hal-i2c.c:331] i2cDumpI2c(): queuePos=0 [I][esp32-hal-i2c.c:332] i2cDumpI2c(): errorByteCnt=0 [I][esp32-hal-i2c.c:333] i2cDumpI2c(): errorQueue=0 [I][esp32-hal-i2c.c:334] i2cDumpI2c(): debugFlags=0x00000000 [I][esp32-hal-i2c.c:311] i2cDumpDqData(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:354] i2cDumpInts(): Debug Buffer not Enabled [D][esp32-hal-i2c.c:1353] i2cProcQueue(): Gross Timeout Dead start=0x27b, e nd=0x2ad, =50, max=50 error=1 [E][esp32-hal-i2c.c:318] i2cDumpI2c(): i2c=0x3ffbe218 [I][esp32-hal-i2c.c:319] i2cDumpI2c(): dev=0x60027000 date=0x16042000 [I][esp32-hal-i2c.c:321] i2cDumpI2c(): lock=0x3ffb8b00 [I][esp32-hal-i2c.c:323] i2cDumpI2c(): num=1 [I][esp32-hal-i2c.c:324] i2cDumpI2c(): mode=1 [I][esp32-hal-i2c.c:325] i2cDumpI2c(): stage=3 [I][esp32-hal-i2c.c:326] i2cDumpI2c(): error=1 [I][esp32-hal-i2c.c:327] i2cDumpI2c(): event=0x3ffb8b88 bits=0 [I][esp32-hal-i2c.c:328] i2cDumpI2c(): intr_handle=0x3ffb8bbc [I][esp32-hal-i2c.c:329] i2cDumpI2c(): dq=0x3ffb8b64 [I][esp32-hal-i2c.c:330] i2cDumpI2c(): queueCount=1 [I][esp32-hal-i2c.c:331] i2cDumpI2c(): queuePos=0 [I][esp32-hal-i2c.c:332] i2cDumpI2c(): errorByteCnt=0 [I][esp32-hal-i2c.c:333] i2cDumpI2c(): errorQueue=1 [I][esp32-hal-i2c.c:334] i2cDumpI2c(): debugFlags=0x00000000 [I][esp32-hal-i2c.c:311] i2cDumpDqData(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:354] i2cDumpInts(): Debug Buffer not Enabled [I][esp32-hal-i2c.c:1138] i2cProcQueue(): Bus busy, reinit

CODE: //I2C BUS

define I2C1_SDA 15

define I2C1_SDL 16

define I2C2_SDA 32

define I2C2_SDL 33

/ I2C Bus / TwoWire I2C1 = TwoWire(0); //I2C1 bus TwoWire I2C2 = TwoWire(1); //I2C2 bus

// LCD

include

M5UnitLCD display (I2C2_SDA,I2C2_SDL,400000); void setup() { Serial.begin(115200); I2C2.begin(I2C2_SDA,I2C2_SDL);

display.begin();

if (display.isEPD()) { display.setEpdMode(epd_mode_t::epd_fastest); display.invertDisplay(true); display.clear(TFT_WHITE); } if (display.width() < display.height()) { display.setRotation(display.getRotation() ^ 1); }

// width=240 , height=135 log_d("width=%d , height=%d",display.width(),display.height());

display.setColorDepth(1); // mono color display.setFont(&fonts::Font4); display.setTextWrap(false); display.setTextSize(3); display.setTextColor(TFT_BLACK);

display.fillScreen(WHITE);

display.drawString("Ready" , 0, (display.height()/3)); }

Nathan Kuo

[lovyan03]

@NathanKuo0821 The constructor of M5UnitLCD and M5UnitOLED can set the I2C port number in the fourth argument. Try the following

  M5UnitLCD display (I2C2_SDA,I2C2_SDL,400000, I2C_NUM_1);

[NathanKuo0821]

@NathanKuo0821 The constructor of M5UnitLCD and M5UnitOLED can set the I2C port number in the fourth argument. Try the following

  M5UnitLCD display (I2C2_SDA,I2C2_SDL,400000, I2C_NUM_1);

Dear Sir, Thanks for your reply . When I set the I2C_NUM_1 in M5UnitLCD as below , ESP32 keeps crashing and restarting. Is this a bug for M5UnitLCD using ESP32 I2C2?

M5UnitLCD display (I2C2_SDA,I2C2_SDL,400000, I2C_NUM_1);

Error Log: [E][common.cpp:939] writeBytes(): i2c write error : ack wait [E][common.cpp:939] writeBytes(): i2c write error : ack wait [D][DetectionManage.cpp:148] displayinit(): width=0 , height=0 Guru Meditation Error: Core 1 panic'ed (IntegerDivideByZero). Exception was unhandled. Core 1 register dump: PC : 0x400e1ba6 PS : 0x00060f30 A0 : 0x800e207a A1 : 0x3ffb1c00 A2 : 0x00000020 A3 : 0x00000000 A4 : 0x00000032 A5 : 0x3ffbe218 A6 : 0x60027000 A7 : 0x00004e20 A8 : 0x800e1b9e A9 : 0x3ffb1be0 A10 : 0x00000000 A11 : 0x00000000 A12 : 0x00000001 A13 : 0x000007bf A14 : 0x00000001 A15 : 0x00000001 SAR : 0x00000018 EXCCAUSE: 0x00000006 EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000

ELF file SHA256: 0000000000000000

Backtrace: 0x400e1ba6:0x3ffb1c00 0x400e2077:0x3ffb1c40 0x400d9a15:0x3ffb1c60 0x400d9a75:0x3ffb1c80 0x400ddd3f:0x3ffb1ca0 0x400ddda9:0x3ffb1cc0 0x400d2580:0x3ffb1ce0 0x400d44a3:0x3ffb1d00 0x400e2cae:0x3ffb1fb0 0x4008a33a:0x3ffb1fd0

Nathan Kuo

[lovyan03]

@NathanKuo0821 What version of ArduinoESP32 do you have? Is the M5GFX up-to-date?

[NathanKuo0821]

@NathanKuo0821 What version of ArduinoESP32 do you have? Is the M5GFX up-to-date?

The version as below , Is this ok? framework-arduinoespressif32 3.20000.220418 (2.0.0) m5stack/M5GFX@^0.0.20

Error Log: [ 18][E][common.cpp:1051] writeBytes(): i2c write error : ack wait [ 19][D][DetectionManage.cpp:148] displayinit(): width=0 , height=0 Guru Meditation Error: Core 1 panic'ed (IntegerDivideByZero). Exception was unhandled.

Core 1 register dump: PC : 0x400eb5f7 PS : 0x00060930 A0 : 0x800ebbf6 A1 : 0x3ffb2460 A2 : 0x00002710 A3 : 0x3ffbe158 A4 : 0x00000032 A5 : 0x60027000 A6 : 0x00000020 A7 : 0x00004e20 A8 : 0x800eb5ed A9 : 0x3ffb2440 A10 : 0x00000000 A11 : 0x00000000 A12 : 0x3ffb99c4 A13 : 0x3ffc38a8 A14 : 0x3ffb9904 A15 : 0x3ffb991c SAR : 0x00000010 EXCCAUSE: 0x00000006 EXCVADDR: 0x00000000 LBEG : 0x40089234 LEND : 0x4008923f LCOUNT : 0x00000000

Backtrace:0x400eb5f4:0x3ffb24600x400ebbf3:0x3ffb24a0 0x400de61d:0x3ffb24d0 0x400de879:0x3ffb24f0 0x400de8e5:0x3ffb2510 0x400d4ec0:0x3ffb2530 0x400d69df:0x3ffb2570 0x400ec5e7:0x3ffb2820

Nathan Kuo

[NathanKuo0821]

If I switch to "I2C1" pin and "I2C_NUM_0" , everything works fine.

M5UnitLCD display (I2C1_SDA,I2C1_SDL,400000, I2C_NUM_0);

or change I2C1 pin to gpio 32/33 and "I2C_NUM_0" , it also still works.

/*
#define I2C1_SDA 15
#define I2C1_SDL 16
#define I2C2_SDA 32
#define I2C2_SDL 33
*/
#define I2C1_SDA 32
#define I2C1_SDL 33
#define I2C2_SDA 15
#define I2C2_SDL 16

M5UnitLCD display (I2C1_SDA,I2C1_SDL,400000, I2C_NUM_0);

I have no idea for this , please give me some more advice. Thanks again.

[lovyan03]

@NathanKuo0821 The TwoWire of the ArduinoESP32 has a prepared instance. Perhaps your creating a separate instance would cause inconvenience. Try using Wire instead of I2C1 and Wire1 instead of I2C2.

[NathanKuo0821]

@NathanKuo0821 The TwoWire of the ArduinoESP32 has a prepared instance. Perhaps your creating a separate instance would cause inconvenience. Try using Wire instead of I2C1 and Wire1 instead of I2C2.

I also tried the example "ESP32 Using Two I2C Bus Interfaces" in this guide "https://randomnerdtutorials.com/esp32-i2c-communication-arduino-ide/" using I2C1 and I2C2 to control other sensors and it works fine. So I don't know what else I can do to verify I2C1 and I2C2 in our device.

Have you tried M5UnitLCD with ESP32 I2C2 before?

Nathan Kuo

[NathanKuo0821]

@NathanKuo0821 The TwoWire of the ArduinoESP32 has a prepared instance. Perhaps your creating a separate instance would cause inconvenience. Try using Wire instead of I2C1 and Wire1 instead of I2C2. Dear Sir,

You are right, I2C2 is working. We can close this thread. Thanks again for your help.

Nathan kuo