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Found 2 results

  1. Hi, Is there a ready library for PID control available for MSP430F5438A or G2553 controllers. Please help if an example is available for the same. Thanks, Tanmay
  2. Hello, I am new to MSP430 devices and learning CCS to program it. I downloaded the following code to my MSP430F5438A contoller to check its behavior. It says LED gets ON when voltage @ P6.0 is greater than half of AVcc. AVcc is 3.3V, so LED should glow when P6.0 > 1.65. But LED doesn't glow until the voltage reaches to 3.6V. Please help me out with this. // MSP430F543xA Demo - ADC12_A, Sample A0, Set P1.0 if A0 > 0.5*AVcc // // Description: A single sample is made on A0 with reference to AVcc. // Software sets ADC12SC to start sample and conversion - ADC12SC // automatically cleared at EOC. ADC12 internal oscillator times sample (16x) // and conversion. In mainloop waits in LPM0 to save power until ADC12 // conversion complete, ADC12_ISR will force exit from LPM0 in Mainloop on // reti. If A0 > 0.5*AVcc, P1.0 set, else reset. // // M Morales // Texas Instruments Inc. // June 2009 // Built with CCE Version: 3.2.2 and IAR Embedded Workbench Version: 4.2 //****************************************************************************** #include <msp430.h> int temp; int main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT ADC12CTL0 = ADC12SHT02 + ADC12ON; // Sampling time, ADC12 on ADC12CTL1 = ADC12SHP; // Use sampling timer ADC12IE = 0x01; // Enable interrupt ADC12CTL0 |= ADC12ENC; P6SEL |= 0x01; // P6.0 ADC option select P1DIR |= BIT0; // P1.0 output __delay_cycles(10000); while (1) { ADC12CTL0 |= ADC12SC; // Start sampling/conversion __bis_SR_register(LPM0_bits + GIE); // LPM0, ADC12_ISR will force exit __no_operation(); // For debugger } } #pragma vector = ADC12_VECTOR __interrupt void ADC12_ISR(void) { switch(__even_in_range(ADC12IV,34)) { case 0: break; // Vector 0: No interrupt case 2: break; // Vector 2: ADC overflow case 4: break; // Vector 4: ADC timing overflow case 6: // Vector 6: ADC12IFG0 temp = ADC12MEM0; if (ADC12MEM0 >= 0x7ff) // ADC12MEM = A0 > 0.5AVcc? P1OUT |= BIT0; // P1.0 = 1 else P1OUT &= ~BIT0; // P1.0 = 0 __bic_SR_register_on_exit(LPM0_bits); // Exit active CPU break; case 8: break; // Vector 8: ADC12IFG1 case 10: break; // Vector 10: ADC12IFG2 case 12: break; // Vector 12: ADC12IFG3 case 14: break; // Vector 14: ADC12IFG4 case 16: break; // Vector 16: ADC12IFG5 case 18: break; // Vector 18: ADC12IFG6 case 20: break; // Vector 20: ADC12IFG7 case 22: break; // Vector 22: ADC12IFG8 case 24: break; // Vector 24: ADC12IFG9 case 26: break; // Vector 26: ADC12IFG10 case 28: break; // Vector 28: ADC12IFG11 case 30: break; // Vector 30: ADC12IFG12 case 32: break; // Vector 32: ADC12IFG13 case 34: break; // Vector 34: ADC12IFG14 default: break; } }