lfo sync button

MIOS programming (Assembler)
1

Hello all,

i build the stepC of the Mbsid (90% finished) and everthing is working. (i will do the report later in an other topic).  

Now i want add a button to control the sync of the Mbsid lfo, just like the lfo waveformbutton.

One button and two leds (off,asn,allnote).

How can i do that?

thanks

chriss

2

Hi Chriss,

unfortunately such a modification requires a lot of small changes in different files. A more comfortable solution is not possible due to timing reasons.

So: the LED status has to be saved in a temporary register.

See cs_menu_leds.inc, search for “LFO waveform” – there are still 3 bits free in TMP5 which could be used.

Once this assignment has been made, you can access to this status register in cs_menu_io_tables.inc (take the last DOUT_ENTRY as example)

In cs_menu_io_tables.inc you also have to call a function when the “sync” button has been pressed (see CS_MENU_BUTTON_LFO_Wav as example)

search for “CS_MENU_BUTTON_LFO_Wav” in cs_menu_buttons.inc — just copy & paste the function, rename the label to “…LFO_Sync” change the cursor position from 0x01 to 0x04

Best Regards, Thorsten.

3

Hello Thorsten,

thanks a lot, i will try it later this day.

chriss

4

Hello Thorsten,

so half of this little mod works so far, the button does what it should do. But not the leds though.

i changed in cs_menu_leds.inc  the file from

;; TMP5[4..0]: LFO waveform

     call      CS_MENU_MS_GetSIDBase

     call      CS_MENU_Hlp_AddLFOOffset

     swapf      INDF0, W

     andlw      0x07

     call      MIOS_HLP_GetBitORMask

     IFCLR      INDF0, 0, movlw 0x00

     movwf      TMP5

to

;; TMP5[6..0]: LFO waveform

     call      CS_MENU_MS_GetSIDBase

     call      CS_MENU_Hlp_AddLFOOffset

     swapf      INDF0, W

     andlw      0x07

     call      MIOS_HLP_GetBitORMask

     IFCLR      INDF0, 0, movlw 0x00

     movwf      TMP5

is that all?

and in the cs_menu_io_tables.inc

DOUT_ENTRY      TMP5, 0,                        5,      1      ; LFO Sine LED

     DOUT_ENTRY      TMP5, 1,                        5,      0      ; LFO Triangle LED

     DOUT_ENTRY      TMP5, 2,                        4,      7      ; LFO Saw LED

     DOUT_ENTRY      TMP5, 3,                        4,      6      ; LFO Pulse LED

     DOUT_ENTRY      TMP5, 4,                        4,      5      ; LFO Random LED

   DOUT_ENTRY      TMP5, 5,                        4,      4      ; LFO Sync Asn

   DOUT_ENTRY      TMP5, 6,                        4,      3      ; LFO Sync All

thanks

chriss

BTW: Is “Lfo Random” not supported? in the menu the Lcd tells me "off"and the led  does not light.

5

Hi Chriss,

Random LFO is one of the new features of the upcoming V1.5

With “andlw 0x07” you’ve masked out the interesting bits. However, I would recomment following four lines after “movlw TMP5” of the original code:

   btfsc INDF0, LFO_MODE_SYNC

   bsf TMP5, 5

   btfsc INDF0, LFO_MODE_SYNC_ALL

   bsf TMP5, 6

(unfortunately the IFSET macro doesn’t work with more than three parameters, therefore btfsc == bit test, skip if clear" has to be used without the macro)

Best Regards, Thorsten.

6

Hello Thorsten,

thanks a lot, it works beautiful.

Hope this mod makes sense!

chriss