1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

ADS1262 and 2.2 SPI TFT (Two SPI Slave) with Arduino

Discussion in 'Programming/Internet' started by ecaits, Oct 8, 2018.

  1. ecaits

    ecaits Guest

    I am interfacing two SPI slave module i.e. ADS1262 and 2.2 SPI TFT with the Arduino Ethernet board.

    When I test each device on its own it works. Initially, I interfaced the TFT to the Arduino and it is working fine. Likewise, the example code of ADS1262 is working fine when I am running it alone.

    So after successfully running the TFT alone, I then wire-up the ADS1262, add the corresponding code, however the ADS1262 doesn't seem to respond.

    I think the issue may be related to the ADS1262_CS or ADS1262_START or ADS1262_DRDY pin sequence to access the ADS1262.

    I have used the ProtoCentral_ads1262 library from GitHub and have used the example code.


    From Comments:
    We have already reserved D10 for Ethernet Controller and D4 for SD Chip select. The issue is, how to communicate both of them, one by one. I can access one of them only when code is prepare for both devices.

    // Portion of the code is given here

    // https://github.com/adafruit/Adafruit_ILI9341 library used for TFT

    // Code start from here






    tft.println(dacvalue,3); // dac value is showing on TFT


    // ADS1262 is need to communicate here as per https://github.com/Protocentral/ProtoCentral_ads1262 library

    // Which pins are need to control here to communicate with ADS1262???

    volatile int p,data;

    if((digitalRead(ADS1262_DRDY_PIN)) == LOW) // monitor Data ready(DRDY pin)
    SPI_RX_Buff_Ptr = PC_ADS1262.ads1262_Read_Data(); // read 6 bytes conversion register
    Responsebyte = true ;

    if(Responsebyte == true)
    for(p = 0; p <5; p++)
    SPI_RX_Buff[SPI_RX_Buff_Count++] = *(SPI_RX_Buff_Ptr + p);
    Responsebyte = false;

    if(SPI_RX_Buff_Count >= 5)
    ads1262_rx_Data[0]= (unsigned char)SPI_RX_Buff[1]; // read 4 bytes adc count
    ads1262_rx_Data[1]= (unsigned char)SPI_RX_Buff[2];
    ads1262_rx_Data[2]= (unsigned char)SPI_RX_Buff[3];
    ads1262_rx_Data[3]= (unsigned char)SPI_RX_Buff[4];

    uads1262Count = (signed long) (((unsigned long)ads1262_rx_Data[0]<<24)|((unsigned long)ads1262_rx_Data[1]<<16)|(ads1262_rx_Data[2]<<8)|ads1262_rx_Data[3]);//get the raw 32-bit adc count out by shifting
    sads1262Count = (signed long) (uads1262Count); // get signed value
    resolution = (double)((double)VREF/pow(2,31)); //resolution= Vref/(2^n-1) , Vref=2.5, n=no of bits
    volt_V = (resolution)*(float)sads1262Count; // voltage = resolution * adc count
    volt_mV = volt_V*1000; // voltage in mV
    tft.println(volt_mV,3); } //not printed on TFT

    In above code, ADS1262 is not activated so not giving value on serial window or TFT.

    How to activate the ADS1262 module.

    Login To add answer/comment

Share This Page