[Digi-Key Follow me Issue 2] + Off-mission Sensor ADS7950

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[Digi-Key Follow me Issue 2] + Off-mission Sensor ADS7950 [Copy link]

 

In total I bought two extra chips, so I made two boards.

The actual device is as above. Currently there is no good driver for Arduino, so I wrote a simple one via SPI.

as follows:

#include<SPI.h>



#defineVSPI_MISO MISO

#defineVSPI_MOSI MOSI

#defineVSPI_SCLK SCK

#defineVSPI_SS  SS



#ifCONFIG_IDF_TARGET_ESP32S2|| CONFIG_IDF_TARGET_ESP32S3

#defineVSPIFSPI

#endif



staticconstintspiClk = 1000000;// 1 MHz



//uninitalised pointers to SPI objects

SPIClass * vspi = NULL;



uint16_tManual_Mode = 1840;



voidsetup(){

 // put your setup code here, to run once:



 Serial.begin(9600);

 Serial.println(F("Hello! Feather AD7950 Test"));



 vspi = new SPIClass(VSPI);



 vspi->begin();



 pinMode(9, OUTPUT);//VSPI SS



}



voidloop(){

 // put your main code here, to run repeatedly:

 uint16_tadc_data;

 uint8_tadc_channel;

 floatadc_Data;

 spi_data_16(vspi, Manual_Mode);

 spi_data_16(vspi, Manual_Mode);

 adc_data = spi_data_16(vspi, Manual_Mode);



 Serial.println(adc_data);

 Serial.print("adc_channel:");

 adc_channel = adc_data >> 12;

 Serial.println(adc_channel);

 Serial.print("adc_data:");

 adc_Data = ((adc_data&0x0fff)/4095.0)*2.5;

 Serial.println(adc_Data);



 delay(1000);

}



uint8_tspi_data(SPIClass *spi, uint8_tdata)

{

 uint8_treceive_data;

 spi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE1));

 receive_data = spi->transfer(data);

 spi->endTransaction();



 returnreceive_data;

}



uint16_tspi_data_16(SPIClass *spi, uint16_tdata)

{

 uint16_treceive_data;

 spi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE1));

 digitalWrite(9, LOW);//pull SS slow to prep other end for transfer

 receive_data = spi->transfer16(data);

 digitalWrite(9, HIGH);//pull ss high to signify end of data transfer

 spi->endTransaction();



 returnreceive_data;

}

This chip has three modes, so I configured one. Also, its input and acquisition have a two-fold relationship, but I didn't see where to configure it in the manual.

The test results are as follows:

Problems will occur if the input exceeds the range. Within 0-1.25V, the input is twice as much, which is quite stable.