diff options
| author | Christian Pointner <equinox@mur.at> | 2011-07-24 19:42:40 +0000 |
|---|---|---|
| committer | Christian Pointner <equinox@mur.at> | 2011-07-24 19:42:40 +0000 |
| commit | c347624b6bd7ba35ca4aa2a4df1060d8e86d16d5 (patch) | |
| tree | 7acf721b649785e177ebbd80c86da127297751e0 /software/ihu/ihu.asm | |
| parent | ihu and ttx reset works now (diff) | |
uart recv works
git-svn-id: https://svn.spreadspace.org/mur.sat@51 7de4ea59-55d0-425e-a1af-a3118ea81d4c
Diffstat (limited to 'software/ihu/ihu.asm')
| -rw-r--r-- | software/ihu/ihu.asm | 84 |
1 files changed, 73 insertions, 11 deletions
diff --git a/software/ihu/ihu.asm b/software/ihu/ihu.asm index 3f49483..9c762f6 100644 --- a/software/ihu/ihu.asm +++ b/software/ihu/ihu.asm @@ -40,12 +40,18 @@ ;; constants ;; I/O Pins +DTMF_D0 EQU 0 +DTMF_D1 EQU 1 +DTMF_D2 EQU 2 +DTMF_D3 EQU 3 +DTMF_PWRDWN EQU 4 TTX_RESET EQU 5 - +TTX_SCL EQU 6 +TTX_SDA EQU 7 + ;; variables ;; page 0 only -CNT0 EQU H'0020' -CNT1 EQU H'0021' +TMP EQU H'0020' ;; all pages W_TEMP EQU H'007E' @@ -69,7 +75,21 @@ STATUS_TEMP EQU H'007F' bcf STATUS,RP0 bcf STATUS,RP1 - ;; TODO: implement interrupt service routines + btfsc PIR1,RCIF + goto int_uart_rx + goto interrupt_end + +int_uart_rx + call uart_rx_byte + btfsc PIR1,RCIF + call uart_rx_byte + btfss RCSTA,OERR + goto int_uart_rx_oe + goto interrupt_end + +int_uart_rx_oe + bcf RCSTA,CREN + bsf RCSTA,CREN interrupt_end ;; restore context @@ -82,26 +102,48 @@ interrupt_end ;; ------------------------------------- ;; INIT init - ;; bank 1 + ;; bank 3 bsf STATUS,RP0 - bcf STATUS,RP1 + bsf STATUS,RP1 + movlw b'00000000' + movwf BAUDCTL + ;; bank 1 + bsf STATUS,RP0 + bcf STATUS,RP1 movlw b'11000111' movwf OPTION_REG clrf PSTRCON movlw b'00010000' movwf OSCCON - movlw b'11011111' + movlw b'00001111' movwf TRISD - bcf STATUS,RP0 - + movlw b'00100100' + movwf TXSTA + movlw .12 + movwf SPBRG + clrf SPBRGH + movlw b'00100000' + movwf PIE1 + clrf PIE2 + ;; bank 0 + bcf STATUS,RP0 + bcf STATUS,RP1 + movlw b'10010000' + movwf RCSTA + movlw B'01000000' + movwf INTCON + bcf PORTD,TTX_RESET ;reset TTX nop nop bsf PORTD,TTX_RESET clrf TMR0 + bsf INTCON,GIE + movlw .1 + movwf TMP goto main ;; ------------------------------------- @@ -111,13 +153,33 @@ init ;; ------------------------------------- ;; SUBROUTINES +uart_rx_byte + btfsc RCSTA,FERR + goto uart_rx_fe + movf RCREG,w ; TODO: move to input string + movwf TXREG + bsf TMP,0 + return - ;; TODO: add subroutines +uart_rx_fe + movf RCREG,w + return ;; ------------------------------------- ;; MAINLOOP main - goto powerdown + btfss TMP,0 + goto main + + bcf TMP,0 + bcf PORTD,DTMF_PWRDWN + bcf INTCON,T0IF + clrf TMR0 +loop + btfss INTCON,T0IF + goto loop + bsf PORTD,DTMF_PWRDWN + goto main powerdown sleep |