Posts made by felmue

Hello @GermanSheepDog

below is an alternative function which works for me too:

#define PI4IOE5V6408_ADDR 0x43
#define OUTPUT_REG 0x05

void my_set_backlight(bool o) {
  uint8_t data = M5.In_I2C.readRegister8(PI4IOE5V6408_ADDR, OUTPUT_REG, 200000);
  if(o == true) data |= 0b10000000;
  else data &= ~0b10000000;
  M5.In_I2C.writeRegister8(PI4IOE5V6408_ADDR, OUTPUT_REG, data, 200000);
}

Thanks
Felix

Hello @GermanSheepDog

your my_set_backlight() function works for me and my_set_backlight(true) turns the backlight off (inverted logic).

void my_set_backlight(bool o) {
  PI4IOE5V6408_Class p;
  // false input, true output
  p.setDirection(7, true);
  // false off, true on ?
  p.digitalWrite(7, o);
}
void setup()
{
  auto cfg = M5.config();
  cfg.serial_baudrate = 115200;
  M5.begin(cfg);
  M5StamPLC.begin();
}
void loop()
{
  M5.update();
  if(M5.BtnA.wasClicked() == true)
  {
    Serial.println("BtnA clicked - backlight on");
    my_set_backlight(false);
  }
  if(M5.BtnC.wasClicked() == true)
  {
    Serial.println("BtnC clicked - backlight off");
    my_set_backlight(true);
  }
}

Thanks
Felix

P.S. the AI generated code did not work for me.

Hello @clydeps

I don't know the pitch of the connector. However my M5Tab5 came with a matching cable. Maybe double-check your box?

Thanks
Felix

Hello @scroggyg

I created a Modbus example for M5Tab5 controlling an ACSSR relay. You can find it in the UIFlow Project Zone: M5Tab5_Modbus_ACSSR_Test_UIFlow2.3.1

Thanks
Felix

Hello @scroggyg

well, I think it shouldn't be too difficult to modify the PwrCAN module to provide power to SYSVIN.

BTW: the PwrCAN module schematic uses the label HPWR on the connectors and the same label is on the M5Bus. Have you actually measured the HPWR pins of the M5Bus of the PwrCAN module? Maybe they are already connected?

Note: I cannot verify this myself as I do not have a PwrCAN module.

Thanks
Felix

Hello @scroggyg

yes, either that or provide 5V via 5VIN.

Thanks
Felix

Hello @scroggyg

M5Tab5 port A is powered through a switch (U26) which when turned on lets SYS_INT5V through to SYS_EXT5VO. The switch is enabled via EXT5V_EN coming from one of the port expanders (U6).

In other words, M5Tab5 cannot be turned on via port A as initially the switch is off.

See schematic here and/or the backside of M5Tab5.

Thanks
Felix

Hello @hacxx

sorry, but I do not understand why you would reply to a post three years later. It just doesn't make sense to me.

Plus an M5Atom Lite doesn't stack well with any module as it doesn't have the M5Stack bus.

Thanks
Felix

Hello guys

I think that is what I wanted to tell you guys with my previous post. The i2c driver install error, which I also get, does not prevent most of my units to work properly.

Out of all my units only two did not work and two I2C units would only work after switching the i2c speed to 400 k.

In other words I do not think the i2c driver install error matters in regard with the Tube Pressure unit, which is not an I2C unit.

@Kenzo : do you have any other units you could try with your M5Tab5? Or any other core(s) you could try the Tube Pressure unit with?

Thanks
Felix

Hello @Kenzo

I think you might have misread my post. I do not have a Tube Pressure unit so I cannot test this case, sorry.

Thanks
Felix

Hi guys

I tested M5Tab5 (running UIFlow 2.3.1) with all the units I have available and most of them worked ok.

Note: I also got the i2c driver install error, but it didn't cause I2C to actually fail.

GPIO units

• SSR - ok

I2C units (bus speed 100k)

• Env III - ok
• Env IV - ok
• ExtIO2 - ok
• Color LCD - ok
• OLED - ok
• PaHUB - Env IV - ok

I2C units (bus speed 400k)

• PbHUB - ok
• 4Relay - ok

Unit Gesture and AMeter did not work for me with either bus speed 100k or 400k. M5Tab5 seemed to hang in setup and a hard reset was required.

Thanks
Felix

Hello @foofera

hmm, the I2C communication working in setup() suggest the wiring is ok.

Are you using pull-up resistors on intSCL and intSDA?

Have you tried lowering the I2C bus speed?

Have you tried to put a delay between issuing I2C commands in your loop() code?

Have you tried to control a different I2C slave device from your STM32? Does that work in both setup() and loop()?

Thanks
Felix

Hello @xgonc

no, I did not try any other Ethernet library.

Thanks
Felix

Hello @xgonc

maybe try with a short delay() before the first loop?

BTW: the included PoE example works for me.

Thanks
Felix

Hello @bensonwhlee

try adding a delay(500) before calling pbhub.begin(). My above linked code fails to initialize PbHub without a delay.

Thanks
Felix

Hello @wjcarpenter

the battery charging IC is TP4057 and battery voltage is measured via R40 / R41 into GPI38. See second page of the schematics here.

Thanks
Felix

Hello @bensonwhlee

I think you need to use the M5StamPLC library together with M5Unified and M5GFX libraries for it to work properly.

Please find an example here which works for me.

Edit: if you don't need M5StamPLC specific functions then it should be sufficient to add the following line to your setup code:

Wire.begin(2, 1, 400000U);

Thanks
Felix

Hello @teastain

I am afraid I cannot help, sorry. I exclusively use Visual Studio Code with PlatformIO / pioarduino (which so far doesn't have this issue).

Note: Visual Studio Code / PlatformIO doesn't use M5Stack boards and setting up new Cores (M5Stack and others) can sometimes be quite difficult as well.

Thanks
Felix

Hello @peolsolutions

you are starting to confusing me.

Your posts often are quite vague and not specific to M5Stack hardware / software.

Also why would you post a very similar response again about a month after your last one? Doesn't make sense to me.

Care to explain you reason(s) for doing that?

Thanks
Felix

Hello @smily77

according to the schematic GPIO15 is used as reset pin (SOC_EXTRF_RST).

Thanks
Felix