diff options
Diffstat (limited to 'software/ttx/ttx.asm')
| -rw-r--r-- | software/ttx/ttx.asm | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/software/ttx/ttx.asm b/software/ttx/ttx.asm index 2fe0268..260314d 100644 --- a/software/ttx/ttx.asm +++ b/software/ttx/ttx.asm @@ -141,7 +141,7 @@ ext_int_next goto ext_int_next ext_int_send_csum - ;; TODO: send out csum + call rx_send_csum movf RX_FSR_TMP,w movwf FSR swapf RX_CMD,w @@ -442,6 +442,32 @@ rx_byte_next goto rx_byte_clk_high ;; ------------------------------------- +rx_send_csum + bsf STATUS,RP0 + bcf TRISIO,SDAT + bcf STATUS,RP0 + movlw .8 + movwf RX_BIT_CNT +rx_send_clk_high + btfss GPIO,SCLK + goto rx_send_clk_high + btfss RX_CSUM,7 + bcf GPIO,SDAT + btfsc RX_CSUM,7 + bsf GPIO,SDAT + decfsz RX_BIT_CNT,f + goto rx_send_next + + bsf STATUS,RP0 + bsf TRISIO,SDAT + bcf STATUS,RP0 + return + +rx_send_next + rlf RX_CSUM,f + goto rx_send_clk_high + + ;; ------------------------------------- dottime movwf TMR0 bcf INTCON,T0IF |