Replies: 2 comments 10 replies
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When you take just the MPR121-simpletest.ino as your minimal example, does it run when you use the https://github.com/arduino/ArduinoCore-mbed as your Arduino core instead of Arduino-Pico?
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i tried with a very basic approach: so here to the read is not successful.. // Serial
#define PIN_SERIAL1_TX (0u)
#define PIN_SERIAL1_RX (1u)
#define PIN_TXD0 PIN_SERIAL1_TX
#define PIN_RXD0 PIN_SERIAL1_RX
// Wire
#define __WIRE0_DEVICE i2c1
#define PIN_WIRE0_SDA PIN_SERIAL1_TX
#define PIN_WIRE0_SCL PIN_SERIAL1_RXwhat do you think? |
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It's perfectly fine for different devices to use the same pins, if only one of those devices is ever BUT on your board note that |
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Actually, it's worse than that. Those pins 0/1 are NOT legal for |
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git |
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it is Working! |
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i installed the udev rules - both - basically my user is part of the dialout group - so this should not be a problem here.. and that really helped. the upload now works. |
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and with the bool Adafruit_MPR121::begin(uint8_t i2caddr, TwoWire *theWire,
uint8_t touchThreshold, uint8_t releaseThreshold,
boolean autoconfig) {
if (i2c_dev) {
delete i2c_dev;
}
i2c_dev = new Adafruit_I2CDevice(i2caddr, theWire);
Serial.println("Adafruit_I2CDevice setup..");
if (!i2c_dev->begin()) {
Serial.println("i2c_dev begin failed..");
return false;
}
Serial.println("done.");
Serial.println("send soft reset..");
// soft reset
writeRegister(MPR121_SOFTRESET, 0x63);
delay(1);
for (uint8_t i = 0; i < 0x7F; i++) {
// Serial.print("$"); Serial.print(i, HEX);
// Serial.print(": 0x"); Serial.println(readRegister8(i), HEX);
}
writeRegister(MPR121_ECR, 0x0);
Serial.print("read: MPR121_CONFIG2 ");
uint8_t c = readRegister8(MPR121_CONFIG2);
Serial.println(c, HEX);
if (c != 0x24)
return false;
Serial.println("write Configuration to sensor ...");i get same sketch with the arduino-pico core |
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i try to get the Adafruit_MPR121 library to work with my bigtreetech SKR-pico board.
my setup and tests can all be found at
https://github.com/s-light/bigtreetech-SKR-Pico
i have tested the sensor with an Cytron Maker Pi RP2040
and that has worked out of the box..
.
when i try the same with myi SKR-pico setup
i can see the device with my I2C-scanner sketch
so the device can be found -
but if i try to use the MPR121-simpletest.ino sketch - it does not start up..
so i added some debug logs to the begin function:
Adafruit_MPR121.cppand as output i get
and when i uncomment the full readRegister8 loop i get a FF for every register -
so it seems something is very buggy while reading...
as the same setup (library +
arduino-picocore + RP2040 uC) works on the Cytron Maker Pi - i am a little bit puzzled -it seems that must have to do something
on the Maker Pi RP2040 the default pins are others.. -
on the SKR-Pico i have no option to change to other pins, as only these two are available on a connector.
i also tried with the [
janelia-arduino/MPR121library](https://github.com/janelia-arduino/MPR121.but this also fails to start up..
(i think it is the same underling issue)
and i also tried with Adafruit_LIS3DH - and there it seems to be the same thing too...
i have no idea at what point i can start to debug this more.
So please let me know what you think here / what i can try.
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