Hello,
I want to read the internal temperature of the stellaris and store the data into the sd card in a .csv format.
I am successfully create the file and also append the data. I am using chan-fat fs library.I getting the data from the internal sensor every second so that i had used timer for the timer interupt.but after the five second i had stop the timer but after the stopping the timer it was not appending the data of the sensor.i send you my code.i don't understand the this type of confusion.
int
main(void)
{
count=0;
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
SysCtlADCSpeedSet(SYSCTL_ADCSPEED_250KSPS);
ADCSequenceDisable(ADC0_BASE, 1);
ADCSequenceConfigure(ADC0_BASE, 1, ADC_TRIGGER_PROCESSOR, 0);
ADCSequenceStepConfigure(ADC0_BASE, 1, 0, ADC_CTL_TS);
ADCSequenceStepConfigure(ADC0_BASE, 1, 1, ADC_CTL_TS);
ADCSequenceStepConfigure(ADC0_BASE, 1, 2, ADC_CTL_TS);
ADCSequenceStepConfigure(ADC0_BASE, 1, 3, ADC_CTL_TS | ADC_CTL_IE | ADC_CTL_END);
ADCSequenceEnable(ADC0_BASE, 1);
// Enable lazy stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
ROM_FPULazyStackingEnable();
// Set the system clock to run at 50MHz from the PLL.
//
ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
GPIOPinTypeGPIOInput(GPIO_PORTB_BASE, GPIO_PIN_2|GPIO_PIN_3);
GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
//
// Configure SysTick for a 100Hz interrupt. The FatFs driver wants a 10 ms tick.
//
/*ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
ROM_SysTickEnable();
ROM_SysTickIntEnable();*/
/*for the user requirment
* here it's generats interupt at every X second.
ulPeriod = SysCtlClockGet()*X;
TimerLoadSet(TIMER0_BASE, TIMER_A, ulPeriod);
*/
fr = f_mount(0, &FatFs);
if(fr != FR_OK)
{
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3,GPIO_PIN_3);
//
// Delay for a bit
//
SysCtlDelay(50000);
return(1);
}
//fr = f_mkdir("sub1");
//if (fr) die(fr);
if (f_open(&Fil, "DEMO1.csv", FA_WRITE | FA_OPEN_ALWAYS ) == FR_OK) // Create a file
{
size = (&Fil)->fsize;
fr= f_lseek(&Fil,size);
fr= f_write(&Fil,"Time,internel_celsius,intenel_fahrenheit\n",39,&bw);
fr= f_write(&Fil,"\n",1,&bw);
//fr= f_write(&Fil,"Time\r\n",6,&bw);
// f_printf(&Fil, "%u", count); /* "1234" */
}
fr=f_close(&Fil);
//count1="0";
indata16 = 0x0000;
GPIOPinWrite(GPIO_PORTB_BASE,CLK, 2);
SysCtlDelay(1000000);
TimerLoadSet(TIMER0_BASE, TIMER_A,SysCtlClockGet());
IntEnable(INT_TIMER0A);
TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
IntMasterEnable();
TimerEnable(TIMER0_BASE, TIMER_A);
//
// Enable Interrupts
//
ROM_IntMasterEnable();
while(1)
{
if(count>=5)
{
//IntDisable(INT_TIMER0A);
TimerIntDisable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
//IntMasterDisable();
//TimerDisable(TIMER0_BASE, TIMER_A);
goto my_data;
}
ADCIntClear(ADC0_BASE, 1);
ADCProcessorTrigger(ADC0_BASE, 1);
while(!ADCIntStatus(ADC0_BASE, 1, false))
{
}
ADCSequenceDataGet(ADC0_BASE, 1, ulADC0Value);
}
my_data:
for(datacount=1;datacount<=5;datacount++)
{
mydatac1=datacount;
itoa(mydatac1,result,10); //this function convert integer to string
itoa(bufferulTempValueC[mydatac1],ulTempValueC1,10); //this function convert integer to string
itoa(bufferulTempValueF[mydatac1],ulTempValueF1,10); //this function convert integer to string
if (f_open(&Fil, "DEMO1.csv", FA_WRITE | FA_OPEN_ALWAYS ) == FR_OK) // Create a file
{
size = (&Fil)->fsize;
fr= f_lseek(&Fil,size);
fr = f_write(&Fil,result,2, &bw);
fr= f_write(&Fil,",",1,&bw);
fr = f_write(&Fil,ulTempValueC1,2, &bw);
fr= f_write(&Fil,",",1,&bw);
fr = f_write(&Fil,ulTempValueF1,2, &bw);
//fr= f_write(&Fil,",",1,&bw);
//fr = f_write(&Fil,Hum1,2, &bw);
//fr= f_write(&Fil,",",1,&bw);
//fr = f_write(&Fil,Temp1,2, &bw);
fr= f_write(&Fil,"\n",1,&bw);
//f_printf(&Fil, "%u", 1234); /* "1234" */
//fr= f_write(&Fil,"Time\r\n",6,&bw);
}
fr=f_close(&Fil);
//mysdcard(datacount);
}
}
void Timer0IntHandler(void)
{
counter=counter+1;
// Clear the timer interrupt
count=count+1;
TimerIntClear (TIMER0_BASE, TIMER_TIMA_TIMEOUT);
if(GPIOPinRead(GPIO_PORTF_BASE, GPIO_PIN_2))
{
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, 0);
}
else
{
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 4);
}
ulTempAvg = (ulADC0Value[0] + ulADC0Value[1] + ulADC0Value[2] + ulADC0Value[3] + 2)/4;
ulTempValueC = (1475 - ((2475 * ulTempAvg)) / 4096)/10;
ulTempValueF = ((ulTempValueC * 9) + 160) / 5;
bufferulTempValueC[count]=ulTempValueC;
bufferulTempValueF[count]=ulTempValueF;
/*indata=temp_hum();
Hum= indata >>8; //Separate Humidity reading into variable
bufferHum[count]=Hum;
Temp= indata & 0x00FF; //Separate Temperature reading into variable
bufferTemp[count]=Temp;*/
}
and after