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Forum Index : Microcontroller and PC projects : PicoGAME 4
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
PicoGAME 3 sank in a sea of apathy (and because I ran out of money!) so here's the beginnings of another attempt. Same box because I like it. Single DB9 and a standard size SD card socket on the front. CP 48x2 audio Optional PAM amplifier, but you'll need to fit a volume knob on the front. No RTC this time as I've run out of I2C ports. PCB designed to accept surface mount Pico or sockets for Pico or YD-RP2040 In theory it can be put into the case without having cutouts in the sides apart from a small hole for the Reset button. Purely optional side entry position for the power connection. I'm not anticipating powering the Pico from its USB all the time, although it can be done if there's no case. DB9 connections: 1 - Latch2 IC2 SCL GP15 2 - Data I2C SDA GP12 3 - Latch1 I2C2 SDA GP14 4 - Clock I2C SCL GP13 5 - ADC0 Direct connection 6 - VCC Controller supply voltage 7 - /LV VCC= approx 4.5V when open, 3V1 when low 8 - GND 9 - /ADAP (ADC1) Via 470R Design aims to get as much versatility as possible. To this end an external adapter PCB can be plugged in to get two controllers if required. The general idea is that, on initialisation, Latch1 and Latch2 are set high. A I2C message is sent on I2C1. If there is no response then a NES or SNES controller is assumed. /ADAP can then be tested. If it is low then there are two controllers connected. If a response to the I2C message is received then it may be a Wii controller. A custom I2C flash ROM could be used to identify other devices. Once again, /ADAP can indicate one or two controllers. In the case of I2C the two Latch lines become I2C2 for the second controller (all Wii controllers have the same fixed address (0x52), I'm told). Additionally, up to two "paddle" controllers can be used. One uses ADC0 and two of the digital inputs for buttons, the other uses /ADAP (ADC1) and the other two buttons./LV must be low to limit the input voltage to 3V3. Note that any Wii controllers will always need an adapter as they need to connect /LV to GND to get a 3v3 supply. The NES and SNES controllers use 5V.as level shifters are incorporated. Still at the ideas stage, but I've done an early PCB drawing to see if things will fit. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2129 |
PicoGAME 3 sank in a sea of apathy (and because I ran out of money!) so here's the beginnings of another attempt. Pico is normally cheap?? No-ones got wii controllers. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
Wii controllers aren't expensive compared to some. This offers them as an option yway, you don't need them. Classic on ebay Motion plus on ebay What *proper* controller would you prefer? Bare PCB or stripboard doesn't count. Edited 2023-11-19 03:28 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I drew the circuit yesterday but then had an idea... should I incorporate the VS1053 module instead of the MCP48x2 chip? To do that there would be compromises, I think: If a plug-in Pico or a YD-RP2040 was to be used then a microSD card would be needed. To keep the full size SD a surface mounted Pico would have to be used. Personally I rather like the idea. I would like to be able to keep a plug-in Pico module though - without going over a 100x100 PCB. It might be worth the effort. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9122 |
Firmware support for the Wii controller is built into the CMM2 and lots of people have got them. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I haven't at the moment, but it doesn't mean that I wouldn't get one. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
Yes, it fits. :) Same PCB size and case. VS1053 audio Optional PAM8403 stereo amplifier (you need to sort out your own sockets & volume control) Standard size SD card socket Single DB9 controller socket Handles one WII controller or one NES/SNES controllers RTC Plug-in Pico or YD-RP2040 or a surface-mounted Pico DB9 connections: NES WII 1 LATCH2 nc 2 DATA nc 3 LATCH1 ns 4 CLOCK nc 5 nc I2C SCL 6 5V nc 7 nc 3V3 8 GND GND 9 nc I2C SDA Obviously some sort of adapter is needed for a WII controller. There is no PCB space for a socket. An adapter is needed if two NES/SNES controllers are used. They have separate Latch signals. Latch1 and Latch2 are ADC inputs so, in theory, a X-Y analogue joystick or two paddles with two buttons each could be used, but detection isn't automatic. . Edited 2023-11-21 07:59 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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vegipete Guru Joined: 29/01/2013 Location: CanadaPosts: 1109 |
Since the purpose of standards is to create more standards, how about using a 1/8 tip-ring-ring-sleeve jack/plug for the I2C connection? Visit Vegipete's *Mite Library for cool programs. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
hehe... Believe it or not I considered putting the outputs from the PAM amplifier on one of these. :) I'll change the VGA connector to RJ45 8P8C, I think. It's smaller, you can get cheap converters very easily and it would give me more board space. I2Cis better on a 6P6C connector, or even a 6P4C. Only half joking. I did this on PicoGAME 3 (unreleased). :) Actually, I like VGA on a RJ45. The leads are cheap and can be more flexible. I tried it over about 3m and there were no problems. And there *is* a sort of standard for it, which is why you can buy ready-made converters. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
There's a layout now. Circuit not quite right at the moment.  I've squeezed a WII controller socket in on the LH side but it's dimensions are intelligent guesswork as I can't find a drawing and I've not got a controller or a socket. The enclosure wall may be too thick, requiring quite a large cutout. The I2C connections appear on the D9 connector as well as here. The VLS1053 is connected using a female-female Dupont loom or something similar. Audio can come from the jack or from wires tacked on underneath. They connect to either J2 (direct output) or J3 (via volume control to PAM8403). A volume control pair can be plugged into J4 and J5 but I'm not sure where you could mount it. The VLS1053 is mounted on 5mm spacers but only 3 can be used as one corner is over the top of the SD card socket. Resistors can be either through-hole or 0603. The Pico can be surface mounted or plug-in. A YD-RP2040 can be used instead. When the RTC battery goes flat take it off, connect the BAT+ wire to it and fit a CR1220. :) GP26 was left so I connected it, via R12, to a socket near the front for an LED mounted in an awkward spot over the fixing screw. :). ========================= EDIT: Circuit diagram: Circuit.pdf . Edited 2023-11-23 00:38 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4241 |
Why not place the VLS1053 connector such that you can plug the board directly on top? (upside down), preferably so that the audio connector and SD card and controller interface connector are in the front panel. Volhout Edited 2023-11-23 18:25 by Volhout PicomiteVGA PETSCII ROBOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I seriously considered that, and I think I could do it. However, I've not got one and I can't find a drawing that gives the connector position (or anything other than the overall size). There's no chance of getting stuff on the front panel unless I get rid of the D9 connector. I could get the WII connector next to it, or a 6P6C RJ. TBH I wouldn't mind doing that. ;) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9122 |
There is the other version of the VS1053 which is available at a good price and has an "easier" header. It has a SDcard on the bottom which we can't use as it connects to the same SPI as the VS1053 but it can be ignored |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
Thanks Peter, I'll try that. It looks as though it might be easier. No-one seems to give even an overall size though. lol ======================== EDIT: It looks like this one will fit. Jack sockets on the front. Took the amp and stuff out as it's no longer needed - this seems to drive headphones or a line out. Managed to keep the D9 connector on the front too. I'm assuming that the CS pin will be for the SD card, so not connecting that. You can't get to it anyway. Incidentally this is how I got the size: Grab the largest photo off the web. Convert to JPG. Insert into NanoCAD as a raster image. Trace over it, putting a line between the positions of the end terminals. Draw a precise line of 22.86mm (9x25.4) Scale the tracing by reference so that the line between the terminal ends matches the reference line length. The board size is now scaled to full size (well, as accurate as the photo). Measure the scaled tracing and convert it to a Makro for SL6. Edited 2023-11-24 01:10 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| vegipete Guru Joined: 29/01/2013 Location: CanadaPosts: 1109 |
You can do all of this directly in Sprint Layout. Import the image, where it sits as (part of) the background, draw, say, a set of 0.1 spaced pads, then adjust the scaling until it lines up as well as possible. Visit Vegipete's *Mite Library for cool programs. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I couldn't see how to import an image.... :( Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1113 |
I have 3 spare PCBs laying aroud from the last version :-D 'no comment |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I have several others too. lol I enjoy the challenge though. :) In all the turmoil of rearranging it again it seems to have grown a two-position link to select SEGA or Atari mode for the DB9 connector now... Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4041 |
I think I have 4 x v2.0 unpopulated PCBs and a stock of components to go with them. I still think you got it "spot on" with that iteration. Best wishes, Tom Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
TBH I like the V2.0 too. That's why it's lasted so long. :) This time around I'm playing with the VLS1053 and the WII controller - I did everything else on V2.0. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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