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Rickard5

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Joined: 31/03/2022
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Posted: 08:58pm 19 Jul 2022

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Somewhere I found enough information on hacking an SD Card directly to a Pico and did it successfully with :
OPTION SYSTEM SPI GP18,GP19,GP16
OPTION SDCARD GP22
Unfortunately I had a situation and the card came disconnected from the pico and I cannot find that info again, does anyone know where I can find a hookup diagram

I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place

Andrew_G
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Joined: 18/10/2016
Location: Australia
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Posted: 09:07pm 19 Jul 2022

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Hi thar perdner,
I've got no idea of the connections but, given the clarity of your photo, can you track the connections down by following the coloured jumpers?

Cheers to y'all y'all,

Andrew

Mixtel90

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Joined: 05/10/2019
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Posted: 09:25pm 19 Jul 2022

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You can put an SD card on any pins. It doesn't matter. You just set up OPTION SDCARD with the pin numbers that you used.

For a standars SD card:
Looking at the copper on the SD card holder, working from the bevel, the pads are
9 1 2 3 4 5 6 7 8

9 - no connection
1 - CS
2 - SDI (MOSI)
3 - GND
4 - 3V3
5 - Clock
6 - GND
7 - SDO (MOSI)
8 - no connection

By the way, if you are going to use a PicoMite VGA the SYSTEM SPI option isn't supported. You have to set up a SD card using OPTION SDCARD CSpin, CLKpin, MOSIpin, MISOpin
Edited 2022-07-20 07:31 by Mixtel90

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Rickard5

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Joined: 31/03/2022
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Posts: 463

Posted: 12:31am 20 Jul 2022

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Andrew_G said
I've got no idea of the connections but, given the clarity of your photo, can you track the connections down by following the coloured jumpers?

Unfortunately I used 2 Black wires And I can't track them down though the mess

I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place

Rickard5

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Posted: 12:39am 20 Jul 2022

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Mixtel90 said You can put an SD card on any pins. It doesn't matter. You just set up OPTION SDCARD with the pin numbers that you used.............

Thanks Mick You are the MAN, you always come though :)

I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place

Rickard5

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Posts: 463

Posted: 03:42am 20 Jul 2022

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OK SO I'VE WIRED WORKING FROM THE BEVEL

- no connection
gp16 - CS
Gp17 - SDI (MOSI)
Gnd - GND
3v3 - 3V3
Gp18 - Clock
GND - GND
GP19- SDO (MOSI)
- no connection

But the real question is which is the mosi and which is the MISO ?
and I reflashed my Pico with picomitevga5.07.04rc3.uf2 and when I do "option SDCARD GP16, GP18, GP19, Gp17

I get "Error : Pin 21 is in use" returned

I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place

phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2642

Posted: 04:44am 20 Jul 2022

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Type OPTION LIST to check for pin assignment conflicts. If you need to change any pin assignments you may need to use OPTION xxxx DISABLE before re-doing that option with different pins.

Page 37 of the manual shows how to connect the Pico pins to the SD pins and describes the two ways of setting the SD up.

SD Card pins (bottom view)
nc CS MOSI Gnd 3V3 SCK nc MISO nc
.�_______________________________
./ 1 � 2 � 3 � 4 � 5 � 6 � 7 � 8 |
/9 CS MOSI Gnd 3V3 SCK nc MISO nc|
|nc � � � � � � � � � �or � � � �|
| � � � � � � � � � � �Gnd � � � |

"Connecting a SD Card
SD cards use the SPI protocol for communications and this needs to be specifically configured before they can
be used. First the �system� SPI port needs to be configured. This is a port that will be used for system use (SD
Card, LCD display and the touch controller on a LCD panel).
There are a number of ports and pins that can be used (see the section PicoMite Hardware) but this example
uses SPI on pins GP18, GP19 and GP16 for Clock, MOSI and MISO.
OPTION SYSTEM SPI GP18, GP19, GP16
Then MMBasic must be told that there is an SD card attached and what pin is used for the Chip Select signal:
OPTION SDCARD GP22
These commands must be entered at the command prompt (not in a program) and will cause the PicoMite to
restart. This has the side effect of disconnecting the USB console interface which will need to be reconnected.
When the PicoMite is restarted MMBasic will automatically initialise the SD card interface. This SPI port will
then not be available to BASIC programs (i.e. it is reserved). To verify the configuration you can use the
command OPTION LIST to list all options that have been set including the configuration of the SD Card."

"Note that you can use many different configurations using various pin allocations � this is just an example
based on the configuration commands listed above.
Care must be taken when the SPI port is shared between a number of devices (SD card, touch, etc). In this case all
the Chip Select signals must configured in MMBasic or alternatively disabled by a permanent connection to 3.3V.
If this is not done any floating Chip Select signal lines will cause the wrong controller to respond to commands on
the SPI bus.
Where no other devices share the SPI bus the SD Card can be set up with:
OPTION SDCARD CSpin, CLKpin, MOSIpin, MISOpin
In this case the pins can be assigned completely flexibly and do not need to be capable of SPI operation."
.
Edited 2022-07-20 14:56 by phil99

matherp
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Joined: 11/12/2012
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Posts: 10315

Posted: 06:57am 20 Jul 2022

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Quote I reflashed my Pico with picomitevga5.07.04rc3.uf2 and when I do "option SDCARD GP16, GP18, GP19, Gp17

I get "Error : Pin 21 is in use" returned

Which pins do the VGA output use? Manual page 6

Mixtel90

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Joined: 05/10/2019
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Posted: 07:44am 20 Jul 2022

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Oops....
Pin 7 - SDO - (MISO)

Must have been the heat. (That's my excuse and I'm sticking to it!)

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Plasmamac

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Joined: 31/01/2019
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Posts: 579

Posted: 08:30am 20 Jul 2022

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Pin 3 and pin 6 are intern connected in the big adapter.

Plasma

Martin H.

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Joined: 04/06/2022
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Posts: 1234

Posted: 09:31am 20 Jul 2022

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Works fine in my "Prototype"

ugly but a New Case (for the counterfeit PicoGame Board)is in Progress

'no comment

thwill

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Joined: 16/09/2019
Location: United Kingdom
Posts: 4311

Posted: 10:59am 20 Jul 2022

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Martin H. said ugly but a New Case (for the counterfeit PicoGame Board)is in Progress �

Excellent, the first "fake"; the PicoGAME must now officially be considered a success!

Honestly I will be delighted to ever see a fake PicoGAME on AliExpress loaded with my programs and no attribution whatsoever - I will officially count the fact that I was involved in the creation of something worth the Chinese cloning as a feather in my cap.

YMMV,

Tom
Edited 2022-07-20 20:59 by thwill

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

Martin H.

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Posted: 11:19am 20 Jul 2022

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not Ali Express ...
I build the circuit, according to the plans, on perforated grid board
and this should fit in the printed Case

so the feather in your cap has to wait ;-)
Edited 2022-07-20 21:21 by Martin H.

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Mixtel90

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Posted: 11:25am 20 Jul 2022

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I dunno....
Some people...
I bet it costs not far off $2 for the perf board (or it might if it was FR4 and 100x100). For that (plus postage, of course) you can get five official PCBs from JLCPCB. :)

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Martin H.

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Posts: 1234

Posted: 11:33am 20 Jul 2022

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Mixtel90 said I dunno....
Some people...
I bet it costs not far off $2 for the perf board (or it might if it was FR4 and 100x100). For that (plus postage, of course) you can get five official PCBs from JLCPCB. :)

so true, but where is the challenge to assemble a finished board

'no comment

pwillard
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Joined: 07/06/2022
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Posts: 313

Posted: 01:40pm 20 Jul 2022

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There is a case? Where?

Mixtel90

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Joined: 05/10/2019
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Posted: 01:50pm 20 Jul 2022

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It looks like Martin is 3D printing his own case for a perfboard build.
The official PCB fits the Hammond case listed on the BOM.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

thwill

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Joined: 16/09/2019
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Posts: 4311

Posted: 01:56pm 20 Jul 2022

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Mixtel90 said It looks like Martin is 3D printing his own case for a perfboard build.
The official PCB fits the Hammond case listed on the BOM.

... and @bigmik has successfully machined me a 3mm case in clear acrylic (just top and bottom) for my 1.4 PCB, photos when I have them.

Best wishes,

Tom

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

pwillard
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Posted: 01:58pm 20 Jul 2022

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Quote Works fine in my "Prototype"

aka "big ol'e mess'o wires" :)

Martin H.

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Posted: 02:02pm 20 Jul 2022

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pwillard said There is a case? �Where?

it will be a modded Version of this one:
https://www.thingiverse.com/thing:1496674/files
(still printing)

'no comment

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