Serial communication only once?

[Ziko87]

Hi,

I wrote the following code:

Main:
    HIGH LED_RED
    LOW LED_GREEN
    pause 500
    
    ;Common setup
    SPBRG = 129 ;Baud rate 9600
    TXSTA.2 = 1 ;BRGH for hight speed
    TXSTA.4 = 0 ;USART coomunication
    RCSTA.7 = 1 ;Serial enable
    ;Tx setup
    PIE1.4 = 0  ;
    TXSTA.6 = 0 ;8 bit
    ;Rx setup
    PIE1.5 = 1  
    RCSTA.6 = 0
    RCSTA.4 = 1
    RCSTA.2 = 0
    RCSTA.1 = 0
    
    HIGH LED_GREEN
    LOW LED_RED 
Ever:
    ;BUTTON switch, 1, 0, 100, button_count, 1, Rx_command
    Hserout ["I wait"]
    hserin [WAIT("MR")]
    HIGH LED_RED
    PAUSE 500
    low LED_RED
    GOTO Ever

The first time posting on the serial "MR,00,0000,CR" works fine, but then the second time does not work anymore. Advise anyone know any solution?

[mister_e]

add

DEFINE HSER_CLROERR 1

at the top of your code

[mackrackit]

Put this in the "Ever" loop
RCSTA.4 = 0 : RCSTA.4 = 1

[mister_e]

This is somehow what the define will do, except it will test if there's any error, if so it will clear them

from the .LIB

      ifdef HSER_CLROERR
    btfsc    RCSTA, OERR    ; Check for overflow error
    bcf    RCSTA, CREN    ; Toggle continuous receive to clear error
    bsf    RCSTA, CREN
      endif