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    BME680 read write is working but no new data receiving

    BME680 read write is working but no new data receiving

    Schakus
    New Poster

    Hello,

    I am trying to get the BME680 working with the Bosch Lib and a PIC32MM0256GPM064.
    I am able to read and write registers and see the correct values via printf's and on my logic analyzer.
    If the example code is reading the sensor data via bme680_get_sensor_data the rslt is everytime BME680_W_NO_NEW_DATA.

    I also tried it with a PIC18F46K42 and got the same problem (but different I2C code provided by MCC).

    My code to verify the I2C functions:

    user_i2c_read(0x77, 0xD0, buffer, 1);
    printf("Read Reg 0x%X: 0x%X (0x61 expected)\n",(0xD0),buffer[0]);
    
    user_delay_ms(100);
    buffer[0] = 0x03;
    user_i2c_write(0x77, 0x72, buffer, 1);
    printf("writing 0x03 to 0x72...\n");
    
    buffer[0] = 0x04;
    user_i2c_write(0x77, 0x64, buffer, 1);
    printf("writing 0x04 to 0x64...\n");
    
    buffer[0] = 0x05;
    user_i2c_write(0x77, 0x5A, buffer, 1);
    printf("writing 0x05 to 0x5A...\n");
    
    buffer[0] = 0x06;
    user_i2c_write(0x77, 0x50, buffer, 1);
    printf("writing 0x06 to 0x50...\n");
    
    user_delay_ms(100);
    buffer[0] = 0;
    user_i2c_read(0x77, 0x72, buffer, 1); // read 
    printf("Read Reg 0x%X: 0x%X (0x03 expected)\n",(0x72),buffer[0]);
    
    buffer[0] = 0;
    user_i2c_read(0x77, 0x64, buffer, 1); // read 
    printf("Read Reg 0x%X: 0x%X (0x04 expected)\n",(0x64),buffer[0]);
    
    buffer[0] = 0;
    user_i2c_read(0x77, 0x5A, buffer, 1); // read 
    printf("Read Reg 0x%X: 0x%X (0x05 expected)\n",(0x5A),buffer[0]);
    
    buffer[0] = 0;
    user_i2c_read(0x77, 0x50, buffer, 1); // read 
    printf("Read Reg 0x%X: 0x%X (0x06 expected)\n",(0x50),buffer[0]);

     

    Console output is:

    Schakus_0-1610013948801.png

    Logic Analyzer:

    Schakus_1-1610014116445.png

     

    Looks good for me. 

     

    But if I let the example code running, BME680_W_NO_NEW_DATA is the result.

    If I let it run once and then read out the wait and heat registers there are wrong (but constant) numbers in.

    Schakus_2-1610014397108.png

     

    What could I do? Is my verification correct?

     

    Thanks!

     

    15 REPLIES 15

    Jet
    Occasional Contributor

    Hi Sir:

         Reading your code of  your write function, according to the related comments, I have not found any errors.

         Do you mean you hope us to offer the logic plot?

         Please confirm the related whole source code of BME680 API operation again, I will re-check it and capture the logic plot to share with you.

     

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