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Showing results for tags 'embedded c'.
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Hello guys,i have a question for my project im using the msp430g2231 microcontroller and i want to measure frequencies up to 10Mhz.Im new to microcontrollers(not programming),and im not sure how to make the overflow work void main(void) { WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer BCSCTL1 = CALBC1_1MHZ; // Set range DCOCTL = CALDCO_1MHZ; // Set DCO step + modulation delay(100); // delay 100mS until next screen refresh /*** Timer_A Set-Up ***/ TA0CCR0 = SampleTuneTime; TA0CCTL0 |= CCIE; // Interrupt enable TA0CTL |= TASSEL_1 + ID_3; // SMCLK TA0CCTL1 |= CCIE + CCIS_0 + CM_1 + CAP; // Interrupt enable, capture select CCIxA, Positive edge, capture mode TA0CTL |= TASSEL_1; //SMCLK _BIS_SR(GIE); // Enter LPM0 with interrupts enabled while(1) { TA0CTL |= MC0; // Start timer up mode.Timer counts up to TACCR0 TA0CTL |= MC1; // Start timer //while(CounterValue != 400); // Wait while CounterValue is not equal to 400 TA0CTL &= ~MC0; // Stop timer mode TA0CTL &= ~MC1; // Stop timer Result >>= 2; // Divide Result by 4 calc_freq(); //convert long into frequency char buffer[8]= { 0, }; unsigned long toLCD = Frequency; // int Base = 10; itoa(toLCD,buffer); //convert decimal lcd_init(); send_string("FREQUENCY IS"); send_command(0xC0); send_string(buffer); send_command(0xC8); send_string("HZ"); Result = 0; // Zero Result CounterValue = 0; // Zero CounterValue StoredCount = 0; // Zero StoredCount TA0R = 0; // Zero Timer_A0 register } } #pragma vector=TIMER0_A0_VECTOR __interrupt void Timer0_A0(void) { TA0CTL &= ~MC0; // Stop timer TA0CTL &= ~MC1; // Stop timer CounterValue++; // Increment CounterValue if (CounterValue >= (NumberSamples +1)) // Reset values if NumberSamples +1 is reached { CounterValue = 0; // Zero CountValue StoredCount = 0; // Zero StoredCount } Result += StoredCount; // Store accumulated count in Result StoredCount = 0; // Zero StoredCount TA0CTL |= MC1; // Start timer TA0CTL |= MC0; // Start timer StoredCount++; // Increment StoredCount } this is the main code of the program im using custom made function for the itoa and the communication with the LCD.I have two questions 1.) Can i make the frequency meter up to 10Mhz cuz the g2231 has one timer and 1Mhz calibration available. 2.)Can i somehow check if the code is working cuz i dont have any way to send frequency right now,like counting the internal frequency or something like that. Thank you for your time.
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Hey All, I tired to write a code, just check it out and tell me whether it gives out a LED glowing MSP430 or no. I know i am bad coder but i am learning it. Code is attached below. Tell me what all i should add in it. Thanks And Regards Msp.txt
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Hey All, Hieeeee When i am debugging my code, it is giving a error called Multiple markers at this line - <a href="file:/D:/code%20composer%20studiov5/ccsv5/tools/compiler/dmed/HTML/MSP430/1527.html">#1527-D</a> (ULP 2.1) Detected SW delay loop using empty loop. Recommend using a timer module instead - #20 identifier "ADC10TL1" is undefined ON THIS LINE while(ADC10CTL1 & ADC10BUSY); Thanks in anticipation Nikki
