Before I sealed up the guitar, I added a wire between Vcc and A3 to monitor the voltage in the system and avoid the situation where I had 3.7V where I should have had 5V. I added a function that periodically checked the incoming voltage and displayed it on the screen in the lower right corner.
I wanted a PANIC mode that continuously sent messages to the synthesizer to stop playing notes on all channels. Some MIDI synthesizers support a command to stop everything simultaneously, but the VS1053 I used did not respond to it. There were sixteen channels with 128 notes each, which came out to 2048 MIDI commands, and I did not want to wait if I started by accident. I configured my PANIC routine to send eight commands and then check if the mode selector was still in PANIC mode. The numbers in the lower left corner rapidly change while panicking.
The PANIC and voltage displays used to kludgey code that updated slowly and caused a lot of flicker, but I noticed and rewrote them so they updated smoothly and went lighter on the processor.
GitHub repo for EWC_Noodle.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2024-12-23
I wanted a PANIC mode that continuously sent messages to the synthesizer to stop playing notes on all channels. Some MIDI synthesizers support a command to stop everything simultaneously, but the VS1053 I used did not respond to it. There were sixteen channels with 128 notes each, which came out to 2048 MIDI commands, and I did not want to wait if I started by accident. I configured my PANIC routine to send eight commands and then check if the mode selector was still in PANIC mode. The numbers in the lower left corner rapidly change while panicking.
The PANIC and voltage displays used to kludgey code that updated slowly and caused a lot of flicker, but I noticed and rewrote them so they updated smoothly and went lighter on the processor.
 |
| Cycling through notes |
GitHub repo for EWC_Noodle.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2024-12-23
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