Parallax P2-EVAL (P2ES chip) pcb demo code

ersmith · 2019-01-15 01:39

pilot0315 wrote: »

Hey thanks a lot for the help. I will look for the P2PASM.
Martin

I'm pretty sure the ROM could be compiled by any of the assemblers available for P2 -- PNut, fastspin, or p2asm. With PNut you might need the most recent version (32j).

ersmith · 2019-01-15 01:42

ke4pjw wrote: »

Um, help me understand why you perform clkset() inside the demo object. Why? I don't recall this in spin 1. You set the clock settings in the top spin file and never had to set it again.

Thanks,
Terry

Yes, for P1 you do not need a clkset. For P2 we do, because (at the moment) there's no implicit clkset() in the startup routine. clkset() is a lot heavier weight in P2 (it requires waiting for a pretty significant period of time (10 milliseconds or so). So I didn't want to make this hidden from the user. It's still only needs to be done once, in the top spin file.

We're also still figuring out what the best clock settings are for P2, so again, it's probably nice not to hide that detail from users.

All of the tools are still under active development. The P2 is not (at this early stage) a beginner friendly platform. As the tools mature that will change!

pilot0315 · 2019-01-15 14:49

To ersmith,

Thanks, I got it going. Now going to play. If I run into any other snags I will let you know.
Appreciate it.

pilot0315 · 2019-01-15 14:54

to evanh
Thanks

samuell · 2019-01-16 13:47

Peter Jakacki wrote: »
Or in TAQOZ try this for effect:
56 8 ADO I PIN 4 HZ 20 ms LOOP
I haven't tried it but not only should the leds blink but with the 20ms delay there should be a rippling effect as well.
The 20ms is actually closer to 80ms due to timing difference between RCFAST and 80MHz FPGA (same with the 20 ms)

BTW - I haven't got a P2-ES board but I could hook up some leds on my P2D2 and video it.

Breakdown of that code:
56 - push 56 onto the stack 
8 - push 8 onto the stack 
ADO - take two values from the stack ( start=56 count=8 ) and set loop for effectively 8 times starting with I = 56
I - leave current index value on stack
PIN - use value from stack to select a pin
4
ms - delay for milliseconds specified
LOOP - increment index until start+count is reached else continue to loop back to code following ADO  
( implicit EXIT or return )

Hi Peter,

I had to adapt the code, since TAQOZ was freezing. Since pins 62 and 63 are problematic in that respect, I had to change the code to:

56 6 ADO I PIN 4 HZ 20 ms LOOP

Anyway, it is a nice effect. Is there any TAQOZ way to exercise the cogs?

Kind regards, Samuel Lourenço

samuell · 2019-01-16 17:42

Hi,

I've loaded up an SD card with the .BIX file provided in the start of this thread, but I can't get the program to boot. I can see the contents of the SD card under TAQOZ, using the "DIR" command. I'm using the original dipswitch configuration (BOD=1, FLASH=0, P59UP=0, P59DN=0).

Kind regards, Samuel Lourenço

Peter Jakacki · 2019-01-16 22:23

This is the TAQOZ1V1 SD BOOT image you should use for the P2-ES board.

The Introduction to TAQOZ has links for these at the start of the document as well as the P2 LINKs sticky thread.

BTW - if you want to load up another cog with TAQOZ use NEWCOG and then you can get it to run like this (ROM version):
(This is my terminal copy&paste, as is including typos etc, and I use ^X to reexecute the previous command on some lines)

TAQOZ# 1 NEWCOG  ok

TAQOZ#   ok

TAQOZ# long counter  ok

TAQOZ# : COUNT_TASK BEGIN counter ++ AGAIN ;  ok

TAQOZ# ' COUNT_TASK 1 RUN ???   ok

TAQOZ# ' COUNT_TASK 1 TASK W!  ok

TAQOZ# counter @ . -38590398 ok

TAQOZ# -38516446 ok

TAQOZ# -38467762 ok

TAQOZ# -38415683 ok

TAQOZ# -38277814 ok

TAQOZ# 0 counter !  ok

TAQOZ# counter @ . 179222 ok

TAQOZ# 239858 ok

TAQOZ# 315675 ok

So after loading cog 1 with a copy of TAQOZ it sits in an IDLE loop looking for a "job" and when the vector is non-zero it will load this and start executing from there. Each cog has an entry in the task table with the job vector being the first 16-bits. Once a job is started and unless it exits back to IDLE it won't execute other jobs. However you can always override the cog with NEWCOG at anytime.

samuell · 2019-01-17 04:04

Thanks Peter,

I've copied the file into the SD card, but still doesn't load. The TAQOZ version is the same. Am I missing a step?

Update: Confirmed that loading only from the SD card fails. P59DN switch was set to 1. No TAQOZ v1.1 in sight. The card may have an issue with the formatting, or something.

Kind regards, Samuel Lourenço

pilot0315 · 2019-01-19 18:21

Cluso99 or anyone.

I downloaded the "_BOOT_P2.BIX" for the sd card. How do I access it. Would someone give me some example code please.

Thanks

samuell · 2019-01-21 02:16

samuell wrote: »

Thanks Peter,

I've copied the file into the SD card, but still doesn't load. The TAQOZ version is the same. Am I missing a step?

Update: Confirmed that loading only from the SD card fails. P59DN switch was set to 1. No TAQOZ v1.1 in sight. The card may have an issue with the formatting, or something.

Kind regards, Samuel Lourenço

Ok, finally solved. Had to reformat the SD card using the "SD Card Formatter" application for Windows, then copied "_BOOT_P2.BIX" again and then, under Linux, deleted the "System Volume Information" via terminal. This way I made sude I only had that file to boot.

pilot0315 wrote: »

Cluso99 or anyone.

I downloaded the "_BOOT_P2.BIX" for the sd card. How do I access it. Would someone give me some example code please.

Thanks

Just copy the file to an empty SD Card, and reset with the switches off (you can leave BOD on). Make sure your card is well formatted. If you need to reformat, don't use the OS format application: use an application specific for SD cards and compliant with the specs.

Kind regards, Samuel Lourenço

evanh · 2019-01-21 03:00

I think it was deleted long filenames caused a boot problem. Or might have been any long filenames first caused it. I never tried again so have forgotten the detail.

pilot0315 · 2019-01-21 16:58

I reformatted the sd card and copied it over. What switches are you talking about?? what is BOD? I am assuming that I can call this as a subroutine so I can print to the Serial Terminal??
Thanks

Mark_T · 2019-01-21 17:41

The P2 Eval board has 4 DIP switches, BOD, flash, P59up, P59down

Publison · 2019-01-21 17:43

pilot0315 wrote: »

I reformatted the sd card and copied it over. What switches are you talking about?? what is BOD? I am assuming that I can call this as a subroutine so I can print to the Serial Terminal??
Thanks

"BOD" Brown Out Detection

Publison · 2019-01-21 18:08

I reformatted the sd card and copied it over. What switches are you talking about?? what is BOD? I am assuming that I can call this as a subroutine so I can print to the Serial Terminal??
Thanks

Referring to this document:
https://docs.google.com/document/d/1gIKAfx5slcwjrAvHnbn5VNReY2SbQxtYkgO8cIzjyyY/edit#heading=h.6frgvwkw4djo

Page 3 picture shows the Mode Selection Switch Bank.

Page 9 shows the Boot Mode Selections.

samuell · 2019-01-22 01:56

pilot0315 wrote: »

I reformatted the sd card and copied it over. What switches are you talking about?? what is BOD? I am assuming that I can call this as a subroutine so I can print to the Serial Terminal??
Thanks

Are you using the P2-ES board? Or the FPGA? On the ES board, you'll have four DIP switches: The first one says BOD (Brown Out Detection). The first you can leave on, the others should be in the off position.

If you load the new TAQOZ from the SD card, it should appear right at the start, after a reset, without having to do the "> ESC" combination.

Kind regards, Samuel Lourenço

pilot0315 · 2019-01-26 22:21

Samuel,
I am using the ES board. Switches are BOD on and the others are off.

pilot0315 · 2019-01-26 22:23

So if I can get this to boot. What am I going to see??

pilot0315 · 2019-01-26 22:24

Samuel,
I am using the ES board. Switches are BOD on and the others are off.

Publison · 2019-01-26 23:46

pilot0315 wrote: »

Samuel,
I am using the ES board. Switches are BOD on and the others are off.

Give this a try. Fire up PST, (Parallax Serial Terminal). Power up the ES Board with the SD with TAQOZ loaded. Connect to to COM port in PST. (Make sure Enable PST if it is blinking). Wait one minute, then hit the reset button on the ES board. That should bring up the TAQOS prompt.

Sometimes I have to toggle DTR in PST,(on then off), then a reset to get the SD to load. May just be my board.

samuell · 2019-01-28 23:17

Publison wrote: »

show previous quotes

pilot0315 wrote: »

Samuel,
I am using the ES board. Switches are BOD on and the others are off.

Give this a try. Fire up PST, (Parallax Serial Terminal). Power up the ES Board with the SD with TAQOZ loaded. Connect to to COM port in PST. (Make sure Enable PST if it is blinking). Wait one minute, then hit the reset button on the ES board. That should bring up the TAQOS prompt.

Sometimes I have to toggle DTR in PST,(on then off), then a reset to get the SD to load. May just be my board.

Strangely I need to do this when using TeraTerm, with the v2.0 image loaded. It used to work right of the bat.

Kind regards, Samuel Lourenço

Mark_T · 2019-01-29 01:16

Pink Noise generation at 2MSPS, using Stenzel's method, 1/f response from about 30Hz upto nearly 1MHz.

The xoro32 generator provides the random bits, the output goes to a DAC pin in 16 bit dither mode.

Stenzel's really cunning pink noise method can be studied here: stenzel.waldorfmusic.de/post/pink/ and here: https://github.com/Stenzel/newshadeofpink

{{
////////////////////////////////////////////////////////////////////////////////////////////
//                  stenzel_pink_noise.spin2
// Pink noise generation using the "new shade of pink" algorithm by Stenzel:
//    http://stenzel.waldorfmusic.de/post/pink/
//    https://github.com/Stenzel/newshadeofpink


// Author: Mark Tillotson
// Updated: 2019-01-28
// Designed For: P2X8C4M64PES
// Version: 1.0

// Provides Start
//   Functions:

//   PUB Start (dest, scale)
//        dest points to a long to which pink noise samples are written every 512 clock cycles
//        scale is a non-negative left shift count used to scale up the results from their natural range
}}

CON
    OSCMODE = $010c3f04
    FREQ = 160_000_000
    BAUD = 2*115200

    PERIOD = $200  ' can be interrogated by client of this object, clocks per iteration
    POWER = 16

    DACpin = 48
    dither_dac = %0000_0000_000_10100_00000000_01_00010_0
    
OBJ
    ser: "SmartSerial.spin2"

PUB Demo
    clkset (OSCMODE, FREQ)
    ser.start (63, 62, 0, BAUD)

    ser.str (string ("Stanzel pink noise generator"))
    ser.tx (13)
    ser.tx (10)
    pausems(1000)

    table_addr := @firtable
    cognew (@asm_entry)

DAT



{ --------------------- main setup and loop with waitct1 --------------------- }

  		ORG     0
		
asm_entry       mov	PTRB, table_addr  ' copy tables to LUTram
		mov	t, #0

		REP	@.done, #128
		rdlong	accum, PTRB++
		WRLUT	accum, t
		add	t, #1
.done
		wrpin	##dither_dac, #DACpin

		getct	time
		mov	resul, #0
.loop
		addct1	time, #80
		WAITCT1
		wypin	resul, #DACpin
                call    #stenzel
		sar	resul, #4
		add	resul, dac_offset
		jmp	#.loop

stenzel
		' get bit mask from counter's lowest 1 and bit reversing
		'add	counter, #1
		'and	counter, mask
		incmod  counter, mask
		mov	bitmask, counter
		neg	t, counter
		and	bitmask, t    ' find lowest set bit in counter
		rev	bitmask
		shr	bitmask, #32-POWER  ' reverse so highest bit changes most rapidly

		getrnd	rand_sample
		testb	rand_sample, #12  wc
		
		andn	dec, bitmask
		mov	t, inc
		and	t, bitmask
		or	dec, t
	if_c	xor	inc, bitmask
		add	accum, inc
		sub	accum, dec

		mov	resul, accum

		mov	t, rand_sample  ' lookup lower bits 5:0
		and	t, #$3F
		rdlut	t, t
		add	resul, t

		mov	t, rand_sample  ' lookup next bits 11:6
		shr	t, #6
		and	t, #$3F
		add	t, #$40
		rdlut	t, t
		add	resul, t

stenzel_ret	ret


table_addr	long	@firtable
scale_shift 	long	0
inc		long	$CCCC
dec		long	$CCCC
accum		long	0
dac_offset	long	$8000
counter		long	0
mask		long    $FFFF

bitmask		res	1
t		res	1
time            res     1
resul		res	1
rand_sample	res	1

		FIT	$1F0


firtable        long    -45437
                long    32588
                long    -34782
                long    43243
                long    -45292
                long    32733
                long    -34638
                long    43387
                long    -43768
                long    34257
                long    -33113
                long    44912
                long    -43623
                long    34402
                long    -32968
                long    45057
                long    -45537
                long    32488
                long    -34882
                long    43143
                long    -45392
                long    32633
                long    -34737
                long    43288
                long    -43867
                long    34158
                long    -33212
                long    44813
                long    -43723
                long    34302
                long    -33068
                long    44957
                long    -44957
                long    33068
                long    -34302
                long    43723
                long    -44813
                long    33212
                long    -34158
                long    43867
                long    -43288
                long    34737
                long    -32633
                long    45392
                long    -43143
                long    34882
                long    -32488
                long    45537
                long    -45057
                long    32968
                long    -34402
                long    43623
                long    -44912
                long    33113
                long    -34257
                long    43768
                long    -43387
                long    34638
                long    -32733
                long    45292
                long    -43243
                long    34782
                long    -32588
                long    45437
highpart
                long    -231
                long    -115
                long    66
                long    182
                long    -333
                long    -217
                long    -36
                long    80
                long    -180
                long    -64
                long    117
                long    233
                long    -282
                long    -166
                long    14
                long    131
                long    -263
                long    -147
                long    34
                long    150
                long    -365
                long    -249
                long    -68
                long    48
                long    -212
                long    -96
                long    85
                long    201
                long    -314
                long    -198
                long    -17
                long    99
                long    -99
                long    17
                long    198
                long    314
                long    -201
                long    -85
                long    96
                long    212
                long    -48
                long    68
                long    249
                long    365
                long    -150
                long    -34
                long    147
                long    263
                long    -131
                long    -14
                long    166
                long    282
                long    -233
                long    -117
                long    64
                long    180
                long    -80
                long    36
                long    217
                long    333
                long    -182
                long    -66
                long    115
                long    231


{{
////////////////////////////////////////////////////////////////////////////////////////////
//                                TERMS OF USE: MIT License
////////////////////////////////////////////////////////////////////////////////////////////
// Permission is hereby granted, free of charge, to any person obtaining a copy of this 
// software and associated documentation files (the "Software"), to deal in the Software 
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit 
// persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
////////////////////////////////////////////////////////////////////////////////////////////
}}

The 1/f nature of the output as displayed on spectrum analyzer on log-log scale (Bode plot):

pilot0315 · 2019-01-30 05:48

Mark_T how did you imbed the above image into the text area??
Also I have not been able to access _BOOT_P2.BIX via the sd card. Can someone walk me through it. I am assuming that I will be able to access the PST terminal using the P2asm code. Would someone give me a simple example of doing that. Something like just printing a variable. If you look at my simple tutorial using pasm from spin I would like to start simple.
Thanks.

http://forums.parallax.com/discussion/169380/pasm-tutorial#latest

msrobots · 2019-01-30 10:08

I am using Spin2Gui from @ersmith and that uses a terminal provided by the loader, I guess.

But it is a all in one solution, you can write PASM2, SPIN2, BASIC and some C code with the same IDE. All gets compiled down to PASM2 (and you can look at the result) and can be started using the build in terminal. No need for PST.

As far as I understand _BOOT_P2.BIX is just any loadable binary named like that and saved to SD. It should then start. Try the newer rom version of TAQOZ @"Peter Jakacki" has in his drop-box. If you save the file as _BOOT_P2.BIX in the root of the SD it should start without changing any jumpers on the EVVAL board.

Then create your own binary using PNUT/spin2gui/spinedit and do the same...

Enjoy!

Mike

Mark_T · 2019-01-30 10:55

pilot0315 wrote: »

Mark_T how did you imbed the above image into the text area??

With the image icon as normal. I'm hosting the image, its not in the forum.

pilot0315 · 2019-01-30 18:08

Mark_T. found it thanks

Parallax P2-EVAL (P2ES chip) pcb demo code

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