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sagarika36

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  1. sagarika36

    HC-SR04 Ultrasonic interfacing

    can u plz send me the code for two ultrasonic sensors....... i tried the same for one hcsr04 its working... but with two hcsr04 its not working properly.... plz help
  2. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    hi... this code is working perfectly wid 1 sensor.... but when m trying to use more den one sensors... it is considering all the conditions ... how to use it... please help#include "msp430.h" #include "stdint.h" //GPIO Pins #define trigger_pin1 BIT1 #define echo_input_pin1 BIT3 #define led1 BIT0 #define trigger_pin2 BIT3 #define echo_input_pin2 BIT4 #define led2 BIT1 //Ultrasound parameters #define timer_period1 62500 // 4 * 62500 = 250ms #define trigger_pulse1 (timer_period1 - 10) #define us_per_cm1 14.5 // Depends on module #define time_to_trigger_us1 450 #define distance_check1 70 #define timer_period2 62500 // 4 * 62500 = 250ms #define trigger_pulse2 (timer_period2 - 10) #define us_per_cm2 14.5 // Depends on module #define time_to_trigger_us2 450 #define distance_check2 70 //Statics static uint16_t echo_pulse_counts1 = 0; static uint16_t echo_pulse_counts2 = 0; //Functions void clk_setup_8mhz(); void setup_trigger_pulse1(); void setup_gpio_echo_interrupt1(); uint16_t get_distance_cm1(); void setup_trigger_pulse2(); void setup_gpio_echo_interrupt2(); uint16_t get_distance_cm2(); //Main void main(void) { clk_setup_8mhz(); setup_trigger_pulse1(); setup_gpio_echo_interrupt1(); setup_trigger_pulse2(); setup_gpio_echo_interrupt2(); P1DIR |= led1; P1OUT &= ~led1; P1DIR |= led2; P1OUT &= ~led2; clk_setup_8mhz(); while(1) { if((get_distance_cm1() < distance_check1)&&(get_distance_cm2() > distance_check2)) { P1OUT |= led1; P1OUT &=~ led2; } else if ((get_distance_cm2() < distance_check2)&&(get_distance_cm1() > distance_check1)) { P1OUT |= led2; P1OUT &= ~led1; } else if (((get_distance_cm1() < distance_check1)&&(get_distance_cm2() < distance_check2))==1) { P1OUT |= led1; P1OUT |= led2; } else{ P1OUT &= ~led1; P1OUT &=~ led2; } } } // End of main void clk_setup_8mhz() { UCA0CTL1 |= UCSWRST; // **Put state machine in reset** UCA0CTL1 |= UCSSEL_2; // SMCLK UCA0BR0 = 109; // 1MHz 115200 (see User's Guide) UCA0BR1 = 0; // 1MHz 115200 UCA0MCTL |= UCBRS_1 + UCBRF_0; // Modulation UCBRSx=1, UCBRFx=0 UCA0CTL1 &= ~UCSWRST; UCA0IV=0x02; // **Initialize USCI state machine** UCA0IE |= UCTXIE + UCRXIE; } void setup_trigger_pulse1() { P4DIR |= trigger_pin1; P4OUT &= ~trigger_pin1; P4SEL |= trigger_pin1; TB0CCR0 = timer_period1;//up mode it will count upto time period value..set// TB0CCTL1 = OUTMOD_7;//reset /set// TB0CCR1 = trigger_pulse1;//reset whn it counts to ccrx value TB0CTL = TBSSEL_2 + MC_1+ ID_2;//smclk,up mode,div by 4,// __enable_interrupt(); } void setup_trigger_pulse2() { P4DIR |= trigger_pin2; P4OUT &= ~trigger_pin2; P4SEL |= trigger_pin2; TB0CCR0 = timer_period2;//up mode it will count upto time period value..set// TB0CCTL3 = OUTMOD_7;//reset /set// TB0CCR3 = trigger_pulse2;//reset whn it counts to ccrx value TB0CTL = TBSSEL_2 + MC_1+ ID_2;//smclk,up mode,div by 4,// __enable_interrupt(); } void setup_gpio_echo_interrupt1() { P1DIR &= ~echo_input_pin1; P1OUT &= ~echo_input_pin1; P1IE |= echo_input_pin1; P1IES |= echo_input_pin1; P1IFG &= ~echo_input_pin1; } void setup_gpio_echo_interrupt2() { P1DIR &= ~echo_input_pin2; P1OUT &= ~echo_input_pin2; P1IE |= echo_input_pin2; P1IES |= echo_input_pin2; P1IFG &= ~echo_input_pin2; } uint16_t get_distance_cm1() { return (echo_pulse_counts1 - time_to_trigger_us1)/ us_per_cm1; } uint16_t get_distance_cm2() { return (echo_pulse_counts2 - time_to_trigger_us2)/ us_per_cm2; } #pragma vector=PORT1_VECTOR __interrupt void PORT_1(void) { echo_pulse_counts1 = TB0R; P1IFG &= ~echo_input_pin1; echo_pulse_counts2 = TB0R; P1IFG &= ~echo_input_pin2; this is my code for msp430f5438... plz help
  3. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    how to set time period for 8Mhz frequency for Msp430F5438A?
  4. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    port 1 interrupt pins r not available in msp430F5438a board? wat should i do?
  5. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    intrtupt port is not available in msp430F5438A board....so how to provide echo interrupt? whether it is timer interrupt? plz explain about the interrupt? while calculating time period where u have got the value 62500? plz explain?
  6. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    why did u choose the clock frequency as 1MHz?? will it very for other boards msp430F5438.... ? plz reply
  7. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    but the trigger pin requires 5v TTL pulse..... will the mosfet provide TTL pulse? m using the code for MSP430F5438A,can u help?
  8. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    which mosfet should we use for triggering ? how to use it please explain how it works...?
  9. sagarika36

    HC - SR04 Ultrasound Module Driver Code

    #define timer_period 62500 // 4 * 62500 = 250ms ---how did you assign 62500? plz reply
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