UART for MSP430FR5969

Question

I'm new for using MSP430FR5969.

I want to program my uart1 to connect the bluetooth PAN1026 with my MSP430.

at the begining I send a rest mode { 0x01, 0x03,0x0c,0x00 } and the bluetooth must answer me
{ 0x04,0x0e,0x04,0x04,0x03,0x0c,0x00 }

So I want to put a condition on UCA1RXBUF it must be equal to { 0x04,0x0e,0x04,0x04,0x03,0x0c,0x00 } until I pass to the second step

else I redo the first step.

Here is my code.

    #include "usart.h"
    void USART0_Init (void) {   // Controller -> PC
    P2SEL1 |= BIT0| BIT1;                    // Configure UART pins
      P2SEL0 &= ~(BIT0| BIT1);

      // Disable the GPIO power-on default high-impedance mode to activate
      // previously configured port settings
      PM5CTL0 &= ~LOCKLPM5;

      // Startup clock system with max DCO setting ~8MHz
      CSCTL0_H = CSKEY >> 8;                    // Unlock clock registers
      CSCTL1 = DCOFSEL_3 | DCORSEL;             // Set DCO to 8MHz
      CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK;
      CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1;     // Set all dividers
      CSCTL0_H = 0  ;                           // Lock CS registers

      // Configure USCI_A1 for UART mode
      UCA0CTLW0 = UCSWRST;                      // Put eUSCI in reset
      UCA0CTLW0 |= UCSSEL__SMCLK;               // CLK = SMCLK
      UCA0BR0 = 4;     //4;                             // 8000000/16/115200
      UCA0BR1 = 0x00;
      UCA0MCTLW |= 0x55;                         //UCOS16 | UCBRF_1;
      UCA0CTLW0 &= ~UCSWRST;                    // Initialize eUSCI
     // UCA0IE |= UCRXIE;                         // Enable USCI_A0 RX interrupt

}
void USART1_Init (void) {   // Controller <-> PAN1026

    P2SEL1 |= BIT5| BIT6;                    // Configure UART pins
      P2SEL0 &= ~(BIT5| BIT6);

      // Configure USCI_A1 for UART mode
      UCA1CTLW0 = UCSWRST;                      // Put eUSCI in reset
      UCA1CTLW0 |= UCSSEL__SMCLK;               // CLK = SMCLK
      UCA1BR0 = 4;                             // 8000000/16/115200
      UCA1BR1 = 0x00;
      UCA1MCTLW |=0x55; //UCOS16 | UCBRF_1;
      UCA1CTLW0 &= ~UCSWRST;                    // Initialize eUSCI
     // UCA1IE |= UCRXIE;                         // Enable USCI_A0 RX interrupt
}
void USART0_SendByte (unsigned char data) {
    while(!(UCA0IFG & UCTXIFG));
    UCA0TXBUF = data;
}
void USART1_SendByte (unsigned char data) {
    while(!(UCA1IFG & UCTXIFG));
    UCA1TXBUF = data;
}
void USART0_SendData (unsigned char data[], unsigned char length) {
    unsigned char i;

    for(i=0; i<length; i++) {
        USART0_SendByte(data[i]);
    }
}
void USART1_SendData (unsigned char data[], unsigned char length) {

    unsigned char i;

    for(i=0; i<length; i++) {
        USART1_SendByte(data[i]);
    }
}
----------------------------------------------------------------------------------------------------------------------
#include <msp430.h>
// Header files
#include "usart.h"

unsigned char TCU_HCI_RESET_REQ[4] = {0x01, 0x03, 0x0c, 0x00};

void main(void) {

        WDT_A_hold(WDT_A_BASE);

    USART0_Init();
    USART1_Init();
while(1){
    USART0_SendData(TCU_HCI_RESET_REQ,4);
    USART1_SendData(TCU_HCI_RESET_REQ,4);
    __delay_cycles(150000);
}
}

Answer 1

you need to write UART receive ISR routine and store data coming from PAN1026. Then after coming out of ISR you can check for data from Bluetooth and take respective decision.