diff options
| -rw-r--r-- | usbdux/usbduxsigma_firmware.asm | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/usbdux/usbduxsigma_firmware.asm b/usbdux/usbduxsigma_firmware.asm index 071d5d6..90998a0 100644 --- a/usbdux/usbduxsigma_firmware.asm +++ b/usbdux/usbduxsigma_firmware.asm @@ -39,6 +39,8 @@ .equ DPTRL,85H .equ DPTRH,86h .equ ASYNC_ON,87h + .equ INTERVAL,88h ; uframe/frame interval + .equ INTCTR,89h ; interval counter ;;; actual code .org 0000h ; after reset the processor starts here @@ -546,7 +548,18 @@ sof_isr: push 07h ; R7 clr IE.7 ; make sure that no other int's disturbe us + + mov r0,#INTCTR ; interval counter + mov a,@r0 ; get the value + dec a ; decrement + mov @r0,a ; save it again + jz sof_adc ; we do ADC functions + ljmp epfull ; we skip all adc functions +sof_adc: + mov r1,#INTERVAL ; get the interval + mov a,@r1 ; get it + mov @r0,a ; save it in the counter mov a,EP2468STAT anl a,#20H ; full? jnz epfull ; EP6-buffer is full @@ -762,6 +775,7 @@ ep1out_jmp: sjmp nothing ; a=6 sjmp pwm_on ; a=7 sjmp pwm_off ; a=8 + sjmp startadcint ; a=9 nothing: ljmp over_da @@ -790,12 +804,25 @@ initsgADchannel: sjmp over_da +startadcint: + mov dptr,#0e781h ; FIFO buffer of EP1OUT from 2nd byte + + movx a,@dptr ; interval is the 1st byte + inc dptr ; data pointer + sjmp startadc2 ; the other paramters as with startadc ;;; config AD: ;;; we write to the registers of the A/D converter startadc: mov dptr,#0e781h ; FIFO buffer of EP1OUT from 2nd byte + mov a,#1 ; interval is 1 here all the time +startadc2: + mov r0,#INTERVAL ; set it + mov @r0,a + mov r0,#INTCTR ; the counter is also just one + mov @r0,a + movx a,@dptr ; get length of channel list inc dptr mov r0,#MAXSMPL |