• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 78 subscribers
  • Views 1066 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

false sending character repeatedly

Bohdan Jedlicka
Expert 1265 points
Other Parts Discussed in Thread: MSP430F5438A, MSP430WARE

Hi All

I need help with my problem. I am using board with MSP430F5438a. For communication using UCA1RXD and UCA1TXD pin.
Problem: When I send character from terminal , UART are sending this character repeatedly till reset. When I debugg it after

UCA1TXBUF = c;  //character

UCRXIFG is set and UART start sending some character.
What to do?
I am using licensed CCSv6.
Thank you.

  • 0
    TI__Guru 56650 points

    Hi,

    without more description of your software and hardware configuration, it might be difficult to tell what causes the issue.

    however I would suggest you to first try running the UART example codes: http://www.ti.com/lit/zip/slac375 - you might need to change the register and I/O pin setting for USCI_A1 since the example codes are only for USCI_A0. Then starting from there, try to develop your code based on the example codes.

  • 0 in reply to Leo Hendrawan
    Expert 1265 points

    Thank you for response. On my doard, only XT2 16MHz is placed. For the first I must solve source of SMCLK.

    I did try msp430x54xA_UCS_8.c example. There are 9 errors appears. It concerns __SFR_FARPTR is undefined errors #20, #41, #80, #91. Please can you give me advice how to solve this problem.
    I consider next step will be example msp430x54xA_usceia0_uart_01.c.
    Thank you.

  • 0 in reply to Bohdan Jedlicka
    Expert 1265 points

    I did find new version of example msp430x54A_UCS_8.c. After building hollowing error appears

    can not open source  hal_pmm.h

    I did find that is the part of MSP430ware_1_90_00_30 and include other header file from this system.
    What to do?
    Thank you.

  • 0 in reply to Bohdan Jedlicka
    TI__Guru 56650 points

    Hi,

    have you tried to use MSP430ware driverlib example instead? This will make things easier also.

    In CCS v6, go to "View" -> "Resource Explorer" and if you have installed MSP430ware you shall see this:

  • 0 in reply to Leo Hendrawan
    Expert 1265 points

    Dear Sir

    I am in CCS v.6. I did find it in MSP430ware - driverlib - example. I  did rewrite it to UART1 of MSP430F5438A. It did not function, when I sent character from terminal no interrupt service occur. I decide to use original UART0 version. On my board RX , TX pins are in connector in TTL version for future bootloader. I did order RS-232 module from MicroE. I did receive it yesterday. I will test all tomorrow. After testing I will send you message here.

**Attention** This is a public forum