diff options
Diffstat (limited to 'software/ihu/ttx.inc')
| -rw-r--r-- | software/ihu/ttx.inc | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/software/ihu/ttx.inc b/software/ihu/ttx.inc index b9f45e7..2098340 100644 --- a/software/ihu/ttx.inc +++ b/software/ihu/ttx.inc @@ -108,7 +108,7 @@ ttx_send_frame movf TTX_BYTE_CNT,f btfsc STATUS,Z - return + goto ttx_get_csum ttx_next_byte call ttx_break @@ -119,16 +119,31 @@ ttx_next_byte decfsz TTX_BYTE_CNT,f goto ttx_next_byte +ttx_get_csum call ttx_break call ttx_recv_byte movf TTX_BYTE,w xorwf TTX_CSUM,w btfss STATUS,Z goto ttx_csum_error - return + retlw .0 ttx_csum_error - ;; TODO: react to comm error - return + retlw .1 ;; ------------------------------------- +ttx_send + call ttx_send_frame + movwf TTX_BYTE + call ttx_break + btfsc TTX_BYTE,0 + bcf PORTD,TTX_SDA + btfss TTX_BYTE,0 + bsf PORTD,TTX_SDA + bsf PORTD,TTX_SCL + nop + nop + nop + bcf PORTD,TTX_SCL + return + ;; ------------------------------------- |