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Linux/ADS8634: ADS8634 read data error

user522982188
Prodigy 150 points
Part Number: ADS8634

Tool/software: Linux

hi

When I write data to the register of ADS8634 through spi, but when the reading data is, it does not conform to the written data.

i want write data;

read data:

  • 0
    Prodigy 150 points
    I want write data:
    uint8_t Writedata2[2];
    Writedata2[0] = 0x07;
    Writedata2[1] = 0x06;
    ret = write(fd,&Writedata2[0],2);
    uint8_t Writedata3[2];
    ret = read(fd,Writedata3,2);
    printf("read Writedata3 = %x %x\n",Writedata3[0],Writedata3[1]);

    I read data:
    [ 86.794977] spidev spi1.0: not using DMA for McSPI (-19)
    [ 86.800409] spidev spi1.0: not using DMA for McSPI (-19)
    spi mode: 0x0
    bits per word: 8
    default tx =
    read_data = 0x0
    read_data = 0x0
    RX | 00 00 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ | ..
    read Writedata3 = 0 0
  • 0 in reply to user522982188
    TI__Guru**** 176331 points
    Hi there,

    Is your issue resolved?