MSP-EXP430FR5994: MSP-EXP430FR5994

Recep YALÇIN

Part Number: MSP-EXP430FR5994
Other Parts Discussed in Thread: MSP430FR5994

Hi,

I am trying to send char from MSP430fr5994 MCU to CCS terminal the code is as below. but I cant see the char on terminal. help please.

Terminal settings are as in the pic.

#include <msp430.h>

int main (void){

P6SEL1 &= ~BIT0;
P6SEL0 |= BIT0;

PM5CTL0 &= ~ LOCKLPM5;
UCA1CTLW0 &= ~UCSWRST ;
char A='A';
int i;
while (1){

UCA1TXBUF =A;
for (i=0; i<1000; i++){}
}

return 0;
}

over 4 years ago

+1 Luke Ledbetter over 4 years ago

TI__Mastermind 23460 points

Are you using the USB connected to the computer and using the UART that way? If, so then you need to use the backchannel UART, which is UCA0. This UART line connects through the USB.

It looks like the pin you chose (6.0) is connected with UCA3TXD instead of UCA1TXD like you have. Change the P6SEL part to the one for UCA1TXD, though I would suggest using the backchannel UART (UCA0) if you are connecting to the PC with the USB.
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  //FOR UCA3TXD
  //P6SEL1 &= ~BIT0;
  //P6SEL0 |= BIT0;
  //FOR UCA1TXD
  P2SEL1 |= (BIT5);
  P2SEL0 &= ~(BIT5);
  //FOR UCA0TXD
  //P2SEL1 |= (BIT0);
  //P2SEL0 &= ~(BIT0);
  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
```
//FOR UCA3TXD
//P6SEL1 &= ~BIT0;
//P6SEL0 |= BIT0;

//FOR UCA1TXD
P2SEL1 |= (BIT5);
P2SEL0 &= ~(BIT5);

//FOR UCA0TXD
//P2SEL1 |= (BIT0);
//P2SEL0 &= ~(BIT0);
```
I don't see the clocks being set so I can't comment on the baud rate being correct

Here are some additional resources to help, eUSCI_A3 Echo, UART Academy. MSP430FR5994 Launchpad User's Guide section 2.2.4 talks about the backchannel UART I mentioned.

0 Recep YALÇIN over 4 years ago in reply to Luke Ledbetter

Prodigy 30 points

// UCOS16 =0, UCBRFx= not used, UCBRS=xD6 thats why " UCA0MCTLW |= 0xD600;" so BR= 115200

I have tried UCA0 with port 2 as well but the result is same. I dont data yet.

----------------------------------------------------------------------------------------------------------------

#include <msp430.h>
int main (void){

//FOR UCA0TXD
P2SEL1 |= (BIT0);
P2SEL0 &= ~(BIT0);
PM5CTL0 &= ~ LOCKLPM5;
UCA0CTLW0 &= ~UCSWRST ;

int i;
while (1){

UCA0TXBUF ='A';
for (i=0; i<1000; i++){}
}

return 0;
}

0 Recep YALÇIN over 4 years ago in reply to Recep YALÇIN

Prodigy 30 points

by the way thanks for answer and recommendations, Yeh I am trying to send data from MSP430FR5994 MCU to CCS terminal via USB. I have tried with UCA0,A1,A3 but all same. I cant receive data...

Also below code supposed to send data each time button (P5.5) pressed via interrupts. But it does not work as well.

Got stuck... Any idea???

**************************************************************************************

#include <msp430.h>

char Message[]="Hello Mf";
unsigned int position;

int main (void){

//switch settings
P5DIR &=~ BIT5;
P5REN |= BIT5;
P5OUT |= BIT5;
P5IES |=BIT5;

//FOR UCA0TXD
P2SEL1 |= (BIT0);
P2SEL0 &= ~(BIT0);

PM5CTL0 &= ~ LOCKLPM5;
UCA0CTLW0 &= ~UCSWRST ;
//enable IRQ
P5IE |=BIT5;
P5IFG &=~ BIT5;
__enable_interrupt();

while (1){}

return 0;
}
//PRAGMA settings
#pragma vector = PORT5_VECTOR
__interrupt void ISR_PORT5_SW(void){
position =0;
UCA0IE |= UCTXIE;
UCA0IFG &=~ UCTXIFG;
UCA0TXBUF =Message[position];

P5IFG &=~ BIT5;

}
#pragma vector = EUSCI_A0_VECTOR
__interrupt void ISR_EUSI_A0(){
if (position==sizeof(Message)){
UCA0IE &=~ UCTXIE;
}else {
position++;
UCA0TXBUF=Message[position];
}
UCA0IFG &=~ UCTXIFG;
}

0 Recep YALÇIN over 4 years ago in reply to Recep YALÇIN

Prodigy 30 points

Yep, I took many hours but finally find out. I cant beileve it. Just an Or signd took my 1 day.

it does not work with that " WDTCTL |= WDTPW | WDTHOLD; "

while it works perfectly with that "WDTCTL = WDTPW | WDTHOLD; "

ahhhh

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MSP-EXP430FR5994: MSP-EXP430FR5994