[i2c] MLX90614 #1694
Comments
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@andriyadi which version are you using? RC3, RC4, Release 1.0.0, or Github direct? Try this test code: #declare SLAVEADDR 0x5A
void setup(){
Serial.begin(115200);
Wire.begin();
Wire.beginTransmission(SLAVEADDR);
Wire.write((uint8_t)0);
uint8_t err = Wire.endTransmission(false);
if(err !=7) {
Serial.printf("Setting Eeprom read to address 0 failed =%d(%s).\n",Wire.lastError(),Wire.getErrorText(Wire.lastError)));
}
uint8_t count = Wire.requestFrom(SLAVEADDR,64);// 32 address 16bits each so 64 bytes
if( count != 64 ){
Serial.printf("Reading Eeprom data failed =%d(%s). Only read %bytes.\n",Wire.lastError(),Wire.getErrorText(Wire.lastError)),count);
}
uint16_t a=0; // eeprom address register
while (Wire.available()){
uint16_t b,c;
b = Wire.read();
c = Wire.read();
b = b | (c << 8);
Serial.printf("0x%02: 0x%02X\n", a++, b);
}
Serial.println(" all done");
}
void loop(){}Chuck. |
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Thanks for your reply @stickbreaker Will get the Release 1.0.0 and try your suggested code. |
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Hi @stickbreaker The output is: |
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Interestingly, I tried your older code (the one before merging, I attach them here), I can communicate properly with the MLX90614 sensor and it returns expected result. As for running your test code, I got this: The first two |
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In fact, I also tried to use your code in your repo of July 2 version, it also works well. I can communicate the sensor properly. Please kindly advice. |
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Can you set core debug level to Verbose I'll look through the read code and see if i can find anything. Chuck |
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I don't know whether it's meaningful to you. Here's what I got @stickbreaker : |
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Thats great, now i have something, |
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@andriyadi found the problem, working through the fix, and TEST it! Chuck. |
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@andriyadi try this fix; substitute this file for: (on a window 7 pro, Arduino 1.8.5)
The fault it mine, I updated the I2C core to fix an interrupt saturation problem, I missed the ReSTART case. Sorry. It works for me but I have not thoroughly tested it. I need some more testing before I create a pr. Chuck. |
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Hi @stickbreaker Few things I've found:
Data are read successfully, but I think you may want to know. Thanks for awesome fix! |
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@andriyadi that error is bus_busy, read the data sheet on your acc, it looks like the sensor is stretching SCL to indicate it is busy. I'll look over it. Chuck. |
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@andriyadi posted a new pull #1717. It changes all 4 files of the i2c subsystem. You might try it by swapping these four files with the release version. Chuck. |
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@stickbreaker thanks for the fix and sorry late response. I've put few comments on PR #1717 |
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Fixed on #1717 =) |
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Hello, I am getting all registers are FFFF while accessing MLX90614 over I2C 12:21:53.108 -> 0 = FFFF so what can be the issue for that? |
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I have changed line 25 in Adafruit_mlx90614.h to The original address was 0x5A it seems the mlx90614 is on address 0x0E |
Hardware:
Board: Custom board
Core Installation/update date: Latest master
IDE: esp-idf with Arduino as component
Description:
I'm having issue with MLX90614 sensor. Using latest core and this Arduino code, it doesn't work anymore. If using previously I2C, before @stickbreaker I2C code merged to master, it all works fine on the very same board. So, the issue is clearly not hardware.
What I meant by "doesn't work" is that the data returned by Wire.read() never be right. Using previous I2C code, it return expected values.
I've tried two libs:
https://github.com/adafruit/Adafruit-MLX90614-Library
https://github.com/sparkfun/SparkFun_MLX90614_Arduino_Library
both not working.
Sketch:
Using examples on both libraries
What I did:
Tried to change clock varying from 10KHz to 100KHz doesn't help (the sensor supports that range). Also changing timeout doesn't help.
Tried to change Adafruit's library to this:
Always return
Cnt: 3, ret: 0x0, pec: 0x0, reg: 0x7Meaning
retis always zero.Please kindly advice. Thanks.
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