MSP430F5172: I have a problem with P2.0 to P2.7,and P3.0 to P3.1 .

Jeff Wong96

Part Number: MSP430F5172
Other Parts Discussed in Thread: MSP-TS430RSB40

When I set the I/O port from P2.0 to P3.7 to high level,but it doesn't works at the development board.

. The code reads as follows：

#include <msp430.h>
void main( void )
{
  // Stop watchdog timer to prevent time out reset
      WDTCTL = WDTPW + WDTHOLD;
      P1DIR |=BIT0;
      P1OUT |=BIT0;
    
      P2DIR |=0xff;
      P2OUT |=0xff; 
      P3DIR |=0xff;
      P3OUT |=0xff;
      


}

over 8 years ago

0 Caleb Overbay over 8 years ago

TI__Genius 15370 points

Hi Jeff,

It appears you are setting the GPIO registers appropriately. However, you're allowing main to exit after setting these registers which could result in undefined behavior. Try adding an infinite while loop at the end of main so it never exits and let me know if the GPIO are set appropriately.

Best regards,
Caleb Overbay

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

Dear Caleb,

I followed your advice just now, I added an infinite while loop at the end of main, but it still doesn't work. I think there may be a problem with this development board.but the development board is new,I'm confused at the moment.

Best regards,

Jeffwong

0 Caleb Overbay over 8 years ago in reply to Jeff Wong96

TI__Genius 15370 points

HI Jeff,

Can you provide your project so I can test it out on my setup?

Best regards,
Caleb Overbay

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

TEST.rar

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

Hi Caleb,

I have provided my project .

Best regards,
Jeff Wong

0 Caleb Overbay over 8 years ago in reply to Jeff Wong96

TI__Genius 15370 points

Hi Jeff,

I tested out your code and did not see the same behavior you're observing. Have you tried this on more than one MSP430? Is there a chance you've accidentally damaged the device?

Best regards,
Caleb Overbay

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

Hi Caleb,

I have replaced three MSP430 ,what's more ,the three chips are all new, and I tested the development board without short circuit or open circuit. It was possible that the development board had some sort of problem, but I didn't find it. Maybe the wet weather led to the problem.

Best regards,

Jeff Wong

0 Caleb Overbay over 8 years ago in reply to Jeff Wong96

TI__Genius 15370 points

HI Jeff,

Besides P3 not being set high are you observing any other strange behavior from the device? And what is the actual voltage present on the P3 pins when you try to set them high?

Best regards,
Caleb Overbay

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

Hi Caleb,
There are no other strange behavior ,when I set the P3 pins to high, there are no output voltage, I called the after-sales service and they said it could be the development board with poor contacts.

Best regards,

Jeff wong

0 Caleb Overbay over 8 years ago in reply to Jeff Wong96

TI__Genius 15370 points

Hi Jeff,

That could be possible, have you tried probing at the pins of the MSP430 instead of the PCB connections? Also are you using the MSP-TS430RSB40 development board for your testing? It would be strange for all the P3 pins to have bad connections and none of the surrounding pins to have the same issue. Have you tried debugging with CCS instead of IAR?

Best regards,
Caleb Overbay

0 Jeff Wong96 over 8 years ago in reply to Caleb Overbay

Intellectual 300 points

HI Caleb,

I have found the problem, the reason that cannot be set to high level is the poor contact of the development board,Maybe the weather is wet, which leads to poor contact. I send it to the after-sales service. They test it with a professional tool, and the test result is poor contact. Thank you very much for helping me solve the problem these days. You are the most enthusiastic engineer.

Best regards,

Jeff Wong

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MSP430F5172: I have a problem with P2.0 to P2.7,and P3.0 to P3.1 .