Clarify usage of UART_Set_Active and uart interrupt

[calixarene]

I would like to use two UART modules at the same time. If I am not using interrupt, I need to use UART_Set_Active() to switch back and forth between two modules to read the data like the manual said.

Code: Select all

UART_Set_Active(@UART1_Read, @UART1_Write, @UART1_Data_Ready, @UART1_Tx_Idle); ' set UART1 active
  uart1_rd = UART1_Read() ;        ' Read message through UART1

UART_Set_Active(@UART2_Read, @UART2_Write, @UART2_Data_Ready, @UART2_Tx_Idle); ' set UART2 active
  uart2_rd = UART2_Read() ;        ' Read through UART2

UART_Set_Active(@UART1_Read, @UART1_Write, @UART1_Data_Ready, @UART1_Tx_Idle); ' set UART1 active
  uart1_rd = UART1_Read() ;        ' Read message through UART1
......

Can I use interruput and Uart1_rd= U1RxReg to read the character so that I don't need to switch back and forth using the UART_Set_Active() procedure. UArt1 is only for listening the message without transmitting and so I don't need it for transmitting.

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sub procedure UART2interrupt() iv IVT_UART_2 ilevel 6 ics ICS_AUTO
  uart2_rd = UART2_Read()         ' read the received data
  U2RXIF_bit = 0
end sub

sub procedure UART1interrupt() iv IVT_UART_1 ilevel 6 ics ICS_AUTO
  if OERR_bit = 1 then 
     OERR_bit = 0      ' overrun error and clear it otherwise the port will be jammed
  end if 
  Uart1_rd = U1RxReg
  U1RXIF_bit = 0
end sub

 UART_Set_Active(@UART2_Read, @UART2_Write, @UART2_Data_Ready, @UART2_Tx_Idle)  ' set only once
 U1RXIE_bit = 1                       ' enable uart1 received interrupt
 U2RXIE_bit = 1                       ' enable uart2 received interrupt

Will this work? In addition, Do I need to check OERR_bit when using UART2_Read() function

Thanks for advice in advance.

[darko.minic]

Hello,

You can use UART1 and UART2 interrupts so you don't need to switch back and forth using the UART_Set_Active() procedure.
Also I can recommend you to check OERR_bit when you're using UART2_Read() function.

Regards,
Darko

[calixarene]

Noted and Thanks.