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amsks

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  1. I am trying a loopback test for msp430f5438a using interrupts. I have initialized the master and slave modules and have written their respective functions as interrupt service routines. The aim I to turn the LED off when the slave receives a character.However, the code is not working. Please tell me how to make it work --------------------------------------------------------------------------------------------------------------------------------- // To use interrupts to transmit and recieve text character(s) #include <msp430.h> /* * main.c */ ? ? void main(void) { WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer P1DIR |= BIT0; P1OUT |=BIT0; // setting up master P3SEL = BIT1|BIT2|BIT3; // B0 PINS UCB2CTL1 |= UCSWRST; UCB2CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC; //3 - PIN, 8 bit, spi master UCB2CTL1 |= UCSSEL_2 ; // SMCLK UCB2CTL1 &= ~(UCSWRST) ; UCB2IE = UCTXIE ; // master setup done // Configuring the Slave P3SEL= BIT0|BIT4|BIT5; UCA0CTL1 |= UCSWRST; //put the SPI bti UCA0CTL0 |= UCCKPH + UCMSB + UCSYNC ; // 3- pin , 8 bit , SPI slave UCA0CTL1 &= ~(UCSWRST) ; //release the pin for sending hte SPI signal UCA0IE = UCRXIE; //Enable RX interrupt // Slave setup done ? __bis_SR_register(GIE); // enable interrupts while(1); } #pragma vector = USCI_B2_VECTOR __interrupt void USCI_B2_ISR (void ) { UCB2TXBUF = 0X0A ; } ? #pragma vector = USCI_A0_VECTOR __interrupt void USCI_A0_ISR ( void ) { if (UCA0RXBUF == 0X0A) { P1OUT &= ~BIT0; } ? } ----------------------------------------------------------------------------------------------------------------------------------------- I am using CCS for IDE
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