Other Parts Discussed in Thread: TM4C1294NCPDT,
Hii,
I am using TM4C1294NCPDT to communicate with ADS8694, i am able to set registers and read it back but while reading analog data i am getting below data and ones check attached code and i am getting same data as below when i connected channel 1 to either 5V or GND
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "inc/tm4c1294ncpdt.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/pin_map.h"
#include "driverlib/debug.h"
#include "inc/hw_gpio.h"
#include "driverlib/timer.h"
#include "driverlib/pwm.h"
#include "driverlib/adc.h"
#include <math.h>
#include "driverlib/fpu.h"
#include "driverlib/uart.h"
#include "driverlib/flash.h"
#include "inc/hw_ssi.h"
#include "driverlib/ssi.h"
void ssi_init(void)
{
uint32_t ui32SysClkFreq;
ui32SysClkFreq = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ | SYSCTL_OSC_MAIN | SYSCTL_USE_PLL | SYSCTL_CFG_VCO_480), 120000000);
SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2); //Enable ssi2
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); //Enable PORT D GPIO to be used with ssi2 data and frame signals
GPIOPinConfigure(GPIO_PD3_SSI2CLK);
GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_2); // ~CS - configure it as GPIO output
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, GPIO_PIN_2);
GPIOPinConfigure(GPIO_PD1_SSI2XDAT0);//mosi
GPIOPinConfigure(GPIO_PD0_SSI2XDAT1);//miso
GPIOPinTypeSSI(GPIO_PORTD_BASE,GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_3);
SSIConfigSetExpClk(SSI2_BASE, ui32SysClkFreq, SSI_FRF_MOTO_MODE_1, SSI_MODE_MASTER, 4000000, 8);
SSIEnable(SSI2_BASE);
}
int main(void)
{
uint32_t data[10];
printf("Well come....\n");
ssi_init();
int i,j;
for(i=0;i<6;i++)
{
SysCtlDelay(8000000);
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, 0x00);//cs low
SysCtlDelay(1200);
SSIDataPut(SSI2_BASE, 0x0D);
while(SSIBusy(SSI2_BASE));
SSIDataPut(SSI2_BASE, 0x05);
while(SSIBusy(SSI2_BASE));
SSIDataPut(SSI2_BASE, 0xFF);//dummy
while(SSIBusy(SSI2_BASE));
SysCtlDelay(1200);
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, GPIO_PIN_2);//cs high
SysCtlDelay(4000000);
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, 0x00);//cs low
SysCtlDelay(1200);
SSIDataPut(SSI2_BASE, 0x0C);//auto sec read mode
while(SSIBusy(SSI2_BASE));
SSIDataPut(SSI2_BASE, 0xFF);//dummy
// while(SSIBusy(SSI2_BASE));
SSIDataGet(SSI2_BASE,&data[2]);
SSIDataPut(SSI2_BASE, 0xFF);//dummy
//while(SSIBusy(SSI2_BASE));
SSIDataGet(SSI2_BASE,&data[3]);
SysCtlDelay(1200);
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, GPIO_PIN_2);//cs high
printf("Data1 = %x\n",data[2]);
printf("Data2 = %x\n",data[3]);
SysCtlDelay(8000000);
}
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, 0x00);//cs low
SysCtlDelay(1200);
SSIDataPut(SSI2_BASE, 0xC4);//
while(SSIBusy(SSI2_BASE));
SSIDataPut(SSI2_BASE, 0x00);//
while(SSIBusy(SSI2_BASE));
SSIDataPut(SSI2_BASE, 0xFF);//dummy
while(SSIBusy(SSI2_BASE));
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, GPIO_PIN_2);//cs high
while(1)
{
SSIDataPut(SSI2_BASE, 0x00);//dummy
SSIDataPut(SSI2_BASE, 0x00);//dummy
SSIDataPut(SSI2_BASE, 0xFF);//dummy
while(SSIBusy(SSI2_BASE));
SSIDataGet(SSI2_BASE,&data[0]);
SSIDataPut(SSI2_BASE, 0xFF);//dummy
while(SSIBusy(SSI2_BASE));
SSIDataGet(SSI2_BASE,&data[1]);
SSIDataPut(SSI2_BASE, 0xFF);//dummy
while(SSIBusy(SSI2_BASE));
SSIDataGet(SSI2_BASE,&data[2]);
SysCtlDelay(1200);
GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2, GPIO_PIN_2);//cs high
for(j=0;j<3;j++)
{
printf("data[%d] = %x\n",j,data[j]);
}
printf("\n");
// SysCtlDelay(8000000);
}
}
