Hi i am trying to interface pga116 (slave) with msp430(master)
i used the following code
#include <msp430.h> volatile char received_ch = 0;int main(void){ WDTCTL = WDTPW + WDTHOLD; // Stop WDT P1OUT |= BIT5; P1DIR |= BIT5; P1SEL = BIT1 | BIT2 | BIT4; P1SEL2 = BIT1 | BIT2 | BIT4; UCA0CTL1 = UCSWRST UCA0CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC; // 3-pin, 8-bit SPI master UCA0CTL1 |= UCSSEL_2; // SMCLK UCA0BR0 |= 0x02; // /2 UCA0BR1 = 0; // UCA0MCTL = 0; // No modulation UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine** P1OUT &= (~BIT5); // Select Device while (!(IFG2 & UCA0TXIFG)); // USCI_A0 TX buffer ready? UCA0TXBUF = 0x11; // gain 2 channel 1 while (!(IFG2 & UCA0RXIFG)); // USCI_A0 RX Received? received_ch = UCA0RXBUF; // Store received data P1OUT |= (BIT5); // Unselect Device}i supply 2V to PGA channel 1 and with gain of 2 I should get 4V at the output pin but when observed on DSO I get a square wave of 50Hz with some other voltage value.
Please help me out as in how to interface pga116 with msp430g2553 using spi.
