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Forum Index : Microcontroller and PC projects : Help needed with Pico2 and VS1053 sound module
| Author | Message | ||||
| WhiteWizzard Guru  Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
I think I may have found a bug with how the Pico2 firmware communicates with a VS1053 (primarily around initialisation). The setup comprises of a standard Raspberry PI Pico 2 and the 'Arduino footprint version' of a VS1053 module (and it does have the VS1053 chip onboard). Note too that I have added the 'line-out' mod so I can drive powered speakers. Pico2 Firmware is the non-VGA/HDMI/USB variant v6.00.00b8. The following OPTIONs have been set: OPTION CPUSPEED 378000 OPTION AUDIO VS1053 GP10, GP11, GP12, GP3, GP4, GP5, GP6 After various experimaental commands typed at the command prompt, everything appears to work as expected. My main tests were around using PLAY TONE left_parameter,right_parameter,duration (and sure enough all was good). But here is the issue. IF I reset the Pico2 (either by power-cycling, WATCHDOG, or reset pin), the Pico resets as expected, but I just hear white-noise primarily in the left speaker. If I then type a PLAY TONE command I briefly hear some white noise in right speaker, then silence, then after about 1 second I hear the PLAY TONE that I typed (in other words there is a delay of about 1 second before I hear the correct sound). All subsequent PLAY TONE commands act right away as expected UNTIL I reset the Pico2 (in which case I continue to hear noise in the left speaker until I send the first sound command). In addition, if I use the EDITor then upon pressing ENTER (after typing EDIT) I get a burst of white noise. On exiting the editor, then on sending the 'next' sound command I will have the delay before the sound is outputted (sometimes white noise during the delay, sometimes not - but there is the delay) So it appears that the VS1053 is not being initialised on startup, and on exiting the editor. Also, if I switch to MIDI mode, then back out of MIDI, the 'dela/noise' issue always appears at the time of the first PLAY TONE command. I hope this all makes sense and was wondering if this is what other people are seeing ? I can confirm I have tried one other VS1053 module (same footprint, same supplier) and that does exactly the same For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4222 |
Hi White Wizzard, I do not have the same setup as you have, but is the behaviour different when you use a lower CPU clock ? The noise you hear could be from ripple on the power supply (in case you use PWM output from the pico itself, starting the editor makes noise. Volhout PicomiteVGA PETSCII ROBOTS |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9100 |
The vs1053 has different firmware loaded depending on use. This is done the first time it is used. What you are seeing is correct. The delay is the time taken to load the firmware. A work round would be to issue a dummy play tone in mm.startup |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
I was going to do a dummy PLAY TONE 0,0,1 in mm.startup but guess that won’t address the delay on using the EDITor (or will it? Not icurrently n front of PICO to try) For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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