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Forum Index : Microcontroller and PC projects : Picomite, no video after firmware update.
| Author | Message | ||||
stuarts Senior Member  Joined: 15/06/2011 Location: AustraliaPosts: 199 |
I've just built a Picomite VGA sourced from Silicon Chip. I was supplied with firmware 5.07.00. I've just updated it to 5.08.00 and I now have no video. Connected to Virtual Serial port, it all seems functional. I've tried doing a clear flash and rolling it back to 5.07.07 and the symptoms are the same. Any suggesstions? Stuart. Time is nature's way of keeping everything from happening all at once. |
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phil99 Guru  Joined: 11/02/2018 Location: AustraliaPosts: 2135 |
See your post on Windmills. |
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| stuarts Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 199 |
Unfortunately, it didn't help. I've installed the firmware from SC and still no video. are there any options to enable vga? Time is nature's way of keeping everything from happening all at once. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4222 |
hi stuarts, Are you sure you have programmed the VGA version of the software. There is also a PicoMiteV5.08.00 microcontroller software version, that does not have VGA output or a PS2 keyboard input. Check for the file that has "VGA" in the name. The SC board is what Geoff calls "Design #1", the details are here. Design #1.zip It complies with the default VGA pinout that PicoMiteVGA 5.08.00 has out of the box. It also complies with the default SD card interface from Peter's VGA platforms. So you should only need to set OPTION SDCARD GP13,GP10,GP11,GP12 After installing the picomite software. And then everything should work (Keyboard, SD card, VGA). The SC unit does not have any audio circuit. When this does not help, is there a blinking green LED (1 sec rate) on the PicoMiteVGA after programming ? Volhout Edited 2024-08-30 20:25 by Volhout PicomiteVGA PETSCII ROBOTS |
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electricat Senior Member Joined: 30/11/2020 Location: LithuaniaPosts: 161 |
I would check if monitor input is set on VGA Check if monitor works with other VGA source Check if PICO led is blinking if loaded default firmware (as from store) Download and extract firmware using different archiver as Volhout said, be sure it is PicomiteVGA firmware, Restet pico once more https://www.raspberrypi.com/documentation/microcontrollers/pico-series.html#resetting-flash-memory I had one original board which went dead after few flashes :( And some count of resets did not helped :( |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4222 |
Another piece of advise (talking from experience)... Check your soldering. The SC design is a kit. You did solder it yourself. Especially if you soldered the Pico on the board without headers (surface mount the pico), there can be solder shorts or insufficient solder connections. Or maybe a solder bridge between the 40 pin header pins.  Volhout Edited 2024-08-30 20:53 by Volhout PicomiteVGA PETSCII ROBOTS |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9109 |
One final thing - Load the clear_flash uf2 before the new firmware to make sure you start clean clear_flash.zip |
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| stuarts Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 199 |
Unfortunately, the link that you provided isn't found. The firmware that I downloaded was from Geoff's page for the picomiteVGA and the firmware name has VGA included. The Monitor happily displays the output from other systems. I've just redownloaded the firmware from Geoff's site and extracted it with WinRAR instead of Windows and it seems to have solved the problem. Thanks for prompting me to use a different archiver. Stuart Time is nature's way of keeping everything from happening all at once. |
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| al18 Senior Member Joined: 06/07/2019 Location: United StatesPosts: 205 |
I’m glad the OP figured out the problem. Speaking as an electronics manufacturing engineer, Volhout’s post made me cringe. There are 9 gold pads on the bottom side of the Pico, so please do NOT surface mount solder a Pico with circuits running under the Pico footprint. Looking at the picture, it just takes one tiny solder ball to connect one of more GPIO circuit to the SWDIO, GND or SWCLK, and you will loose too much hair trying to determine the fault. If you insist on surface mount soldering this board, do yourself a favor and cover the circuits with a piece of polyimide/Kapton tape before soldering the Pico. |
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