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Forum Index : Microcontroller and PC projects : PicoMite V6.00.02 betas
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 7503 |
Does the MAX98357A even do the same thing as a PCM5102A? The data sheet says it's an amplifier with PCM input (which can accept I2S) whereas the PCM5102A is a DAC with I2S input. If it's a different beast I suppose you'd be lucky if anything came out, never mind distortion. :) I don't know much about these things yet. IIRC the output from the PCM5102A is analogue at 2V. Unless you have a volume control or some other sort of divider you will overload a lot of the small amplifier modules as they are usually set for high gain by default. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2416 |
PLAY SOUND can add several sounds together so each is limited to 25% to prevent overloading. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
MAX98357A can be set for different gains by setting the voltage on its pins. For use with the Pico you would need to set if for minimum gain = 3dB. The Chinese modules could be set to anything. It can also be configured for different types of input signal - not just I2S so who knows if it has been set up correctly. The best advice for those modules is - AVOID |
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electricat Senior Member  Joined: 30/11/2020 Location: LithuaniaPosts: 295 |
Sorry, Peter, I`m not native english, and do not get what you meant. Should we avoid Chinese modules or MAX98357A/B ? I do not have on hand MAX98357A at the moment, but it is few days away from me  @Mick I did not read datasheet extensively, but from what I see in functional diagram pg33, and general description pg1, MAX98357A combines a DAC and a speaker driver amplifier in a single package I have no large expierence in DAC`s however. Only reading some datasheets and specifications before. @JanVolk MAX98357A datasheet`s page 28 GAIN_SLOT , 2nd leg (if it is module, should be just GAIN) Connect to VDD through 100kΩ ±5% resistor for gain 3dB . (Also current supply must be capable output ~1,5A, but you might know it) Edited 2025-01-27 16:44 by electricat My MMBasic 'sand box' |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4854 |
Hi Peter, On the 6.00.02 b2,b3,b4 PETSCII ROBOTS does not work anymore on RP2040 VGA. The game intro starts, when you select a game and start, audio runs, but video is a blank screen. Maybe related to layer framebuffer, where you made a fix in MODE 1, that affects MODE 2 ? 6.00.01 (from Geoff's site) works fine. Regards, Volhout Edited 2025-01-27 19:19 by Volhout PicomiteVGA PETSCII ROBOTS |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
Please post the exact version of the complete program that you are testing |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4854 |
Hi Peter, petrobot.zip I tried "robots601.bas" and "robots602.bas". 602 does not have Tom's latest fix yet (music on-off). It is something very basic, since not even the "LOADING" popup does not show. If you want to select controller manual, run "robots2.bas". Volhout Edited 2025-01-27 19:59 by Volhout PicomiteVGA PETSCII ROBOTS |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
It works on CPUSPEED 315000 or 378000. Must be an optimisation issue of the VGA driver. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
RP2040 VGA versions updated in the download to sort optimization issue https://geoffg.net/Downloads/picomite/PicoMite_Beta.zip |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4854 |
 Volhout PicomiteVGA PETSCII ROBOTS |
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javavi Guru Joined: 01/10/2023 Location: UkrainePosts: 436 |
PicoMiteVGAUSB RP2040 V6.00.02b4 When reading the file size from disk A: the state of the pressed keys of the KeyDown(1) function is reset, but this does not happen when reading the file size from disk B: (while holding the key) Do ? MM.Info(FILESIZE "fname") ? KEYDOWN(1) Loop Edited 2025-01-28 07:54 by javavi |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
It is what it is |
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| javavi Guru Joined: 01/10/2023 Location: UkrainePosts: 436 |
Sad! This slows down File Manager a bit with drive A: when using USB keyboard. FM121.zip |
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| electricat Senior Member Joined: 30/11/2020 Location: LithuaniaPosts: 295 |
Peter, RP2350HDMIUSB b4 Wrote simple program. It opens file, reads, prints results etc. nothing fancy. Sits in same folder where --> file to read <-- sits. All works. Swiched off. Later returned to continue, swiched on. After power cycle --> F2. Paths are sure naturally lost and so program does not see file. But! Instead of throwing file missing error, it skips file opening completely and tires execute code as if it opened file I think it should throw error according to manual if file is "missing" --> "INPUT will open the file for reading and throw an error if the file does not exist." My MMBasic 'sand box' |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3998 |
Probably best to post a short program to reproduce it. (With OPTION LIST) John |
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| electricat Senior Member Joined: 30/11/2020 Location: LithuaniaPosts: 295 |
@JohnS Sure Few lines of code to extract SD card pin numbers, from option files  options.zip After longer period I always forget SD card pins and without SD card working there is no way load saved options files from SD card If it was flash nuke for example P.S. Might not work with user option files as it does not check #ifdef PICOMITE #ifdef PICOMITEWEB #ifdef PICOMITEVGA Edited 2025-01-28 23:51 by electricat My MMBasic 'sand box' |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10067 |
You are opening a file for random and not input. The behaviour is correct. Random works the same as output and creates a file if one does not exist. Use MM.INFO(EXISTSFILE |
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| bfwolf Regular Member  Joined: 03/01/2025 Location: GermanyPosts: 72 |
As the "FILES" command may take a long time on large dirs, this may be the reason for being "impossible"? Perhaps the adding of the commwands/functions "OPENDIR", "READDIR$()", "CLOSEDIR" could help with this situation?  This would also create the ability, to read dirs to string arrays from within basic programs.. bfwolf |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4854 |
hi bfwolf This function already exists. That is how javavi's filemanager works. Look for DIR$() in the user manual. Volhout Edited 2025-01-29 01:34 by Volhout PicomiteVGA PETSCII ROBOTS |
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| bfwolf Regular Member Joined: 03/01/2025 Location: GermanyPosts: 72 |
hi Volhout, thx! Seems, I was blind.. I probably saw it once, when walking through the commands/functions list in the manual but read to fast or just forgot it since then.. The different behaviour of DIR$() with args as "OPENDIR" and with empty args as READDIR$ is somewhat "tricky" - but if it works.. Google showed me, das VBA behaves same with the Dir() function.. bfwolf |
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| Page 7 of 23 |
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