;POLITECHNIKA OPOLSKA
;PROGRAM DLA RS + USB
;PRACA DYPLOMOWA 
;MARCIN BAROWSKI
;JANUSZ SZYMANSKI
;  2006/2007


#include  <msp430x44x.h>
;------------------------------------------------------------------------------
            ORG     01100h                  ; Program Start
;------------------------------------------------------------------------------
RESET       mov.w   #0A00h,SP               ; 
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
SetupFLL    bis.b   #XCAP14PF,&FLL_CTL0     ; 
SetupP3     bis.b   #030h,&P2SEL            ; P2.4,5 = USART0 TXD/RXD
SetupP4     bis.b   #003h,&P4SEL            ; P4.0,1 = USART1 TXD/RXD
SetupUART0  bis.b   #UTXE0+URXE0,&ME1       ; Zalacz USART0 TXD/RXD
SetupUART1  bis.b   #UTXE1+URXE1,&ME2       ; Zalacz USART1 TXD/RXD

            bis.b   #CHAR,&UCTL0            ; 8-bit 
            bis.b   #CHAR,&UCTL1            ; 8-bit 
            mov.b   #SSEL1,&UTCTL0          ; UCLK = SMCLK
            mov.b   #SSEL1,&UTCTL1          ; UCLK1 = SMCLK
            mov.b   #01Bh,&UBR00            ; 1MHz 38400
            mov.b   #01Bh,&UBR01            ; 1MHz 38400
            mov.b   #000h,&UBR10            ; 1MHz 38400
            mov.b   #000h,&UBR11            ; 1MHz 38400
            mov.b   #003h,&UMCTL1           ; Modulacia
            mov.b   #003h,&UMCTL0           ; Modulacia
            bic.b   #SWRST,&UCTL0           ; **Initialize USART state machine**
            bic.b   #SWRST,&UCTL1           ; **Initialize USART state machine**
            bis.b   #URXIE0,&IE1            ; Zalacz przerwanie USART0 RX0 
            bis.b   #URXIE1,&IE2            ; Zalacz przerwanie USART1 RX1  
  
                                            ;
Mainloop1    bis.b   #GIE,SR                ; Enter LPM0, interrupts enabled
             
             nop                            ; 
             jmp Mainloop1                               ;
                             
;------------------------------------------------------------------------------
USART0RX_ISR;  Echo back RXed character, confirm TX buffer is ready first
;------------------------------------------------------------------------------
TX0         bit.b   #UTXIFG0,&IFG1          ; USART0 TX buffer gotowy?
            jz      TX0                     ; Skocz jesli TX bufor nie gotowy
            mov.b   &RXBUF0,&TXBUF0         ; TX -> RX
            mov.b   &RXBUF0,&TXBUF1
            reti                            ;
                                            ;
;------------------------------------------------------------------------------
USART1RX_ISR;  Echo back RXed character, confirm TX buffer is ready first
;------------------------------------------------------------------------------
TX1         bit.b   #UTXIFG1,&IFG2         
            jz      TX1                    
            mov.b   &RXBUF1,&TXBUF1         
            mov.b   &RXBUF1,&TXBUF0 
            
            reti                            ;
                                            ;

;------------------------------------------------------------------------------
;           Interrupt Vectors
;------------------------------------------------------------------------------
            ORG     0FFFEh                  ; RESET Vector
            DW      RESET                   ;
            ORG     0FFF2h                  ; USART0 Rx Vector
            DW      USART0RX_ISR            ;
            ORG     0FFE6h                  
            DW      USART1RX_ISR            
            END