Cappaddy - Revision history

0rel at 18:00, 14 April 2021

2021-04-14T18:00:28Z

← Older revision		Revision as of 20:00, 14 April 2021
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	* Optional I2C connector		* Optional I2C connector
	* Optional USB connector		* Optional USB connector

	~~Some pics are collected [http://log.0rel.com/?p=2609 there].~~

	=== Circuit ===		=== Circuit ===

	[[File:cappaddy_rev0.03_schematics_2016-04-24.png]]		[[File:cappaddy_rev0.03_schematics_2016-04-24.png]]
	~~[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_rev0.03_schematics.pdf cappaddy_rev0.03_schematics.pdf]~~

	=== BOM ===		=== BOM ===
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	~~KiCad project with gerbers, BOM spread sheet and schematics:~~
	~~[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_rev0.03_local.zip cappaddy_rev0.03_local.zip]~~

	=== Errata / Known Bugs ===		=== Errata / Known Bugs ===
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	[https://cad.onshape.com/documents/71d91d006a1dab285cabf8eb OnShape project]		[https://cad.onshape.com/documents/71d91d006a1dab285cabf8eb OnShape project]

	~~STLs: [http://0rel.com/prj/cappaddy/rev0.03/cappaddy1_case_v4_STL.zip cappaddy1_case_v4_STL.zip]~~

	[[File:cappaddy_rev0.03_caseV4_DSCN1043_600.jpg]]		[[File:cappaddy_rev0.03_caseV4_DSCN1043_600.jpg]]
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	A word on STM docs and tools. Overall this STM32Cube tool is really useful generating the necessary initialization code and drivers (HAL) to work with. On the downside of that, I couldn't find any proper documentation on all the HAL functions, beside the comments in the source files and all the scattered ST example projects. That makes things quite annoying to work with. I actually really prefer to use those HAL functions instead of twiddling bits in all the registers myself. However, without proper documentation things feel more like a puzzle game in a cryptic world without a map.		A word on STM docs and tools. Overall this STM32Cube tool is really useful generating the necessary initialization code and drivers (HAL) to work with. On the downside of that, I couldn't find any proper documentation on all the HAL functions, beside the comments in the source files and all the scattered ST example projects. That makes things quite annoying to work with. I actually really prefer to use those HAL functions instead of twiddling bits in all the registers myself. However, without proper documentation things feel more like a puzzle game in a cryptic world without a map.
	)		)

	~~[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC5.zip cappaddy_TSC5.zip]~~

	~~crude 12-bit version:~~
	~~[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC7.zip cappaddy_TSC7.zip]~~

	[[File:Cappaddy_rev0.03_caseV4_DSCN1096.jpg]]		[[File:Cappaddy_rev0.03_caseV4_DSCN1096.jpg]]
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	[[File:cappaddy_rev0.03_matplotlib_00a.jpg]]		[[File:cappaddy_rev0.03_matplotlib_00a.jpg]]

	~~Tmp script:~~
	~~[http://0rel.com/prj/cappaddy/rev0.03/plot_serial.py plot_serial.py]~~

	== Tool: Flash Downloader ==		== Tool: Flash Downloader ==
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	in< ----------------		in< ----------------
	(...)		(...)
	~~</pre>~~

	~~Tmp script:~~
	~~[http://0rel.com/prj/cappaddy/rev0.03/py_serial_send_wav.py py_serial_send_wav.py]~~

	~~== Tool: Sample Converter ==~~

	~~Here a bunch of scripts to convert wav or mp3 files to raw samples (and also header files to paste right into your code):~~

	~~[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_sample_converter0.zip cappaddy_sample_converter0.zip]~~

	~~It can be used like that. The .raw file is the right one to use with the flash programmer above:~~
	~~<pre>~~
	~~$ ./convert_8bit_22050hz_mono.sh cartoon_1302.mp3~~
	~~CONVERT cartoon_1302.mp3 WITH sox:~~
	~~-> ./conv_cartoon_1302.mp3/cartoon_1302.mp3_8bit_22050Hz_mono.wav~~
	~~-> ./conv_cartoon_1302.mp3/cartoon_1302.mp3_8bit_22050Hz_mono.raw~~
	~~CONVERT WITH CUSTOM PROGRAM (hexd):~~
	~~-> ./conv_cartoon_1302.mp3/cartoon_1302.mp3_8bit_22050Hz_mono.raw.hexd.txt~~
	~~CONVERT WITH xxd (nicer output):~~
	~~-> ./conv_cartoon_1302.mp3/cartoon_1302.mp3_8bit_22050Hz_mono.raw.xxd.txt~~
	</pre>		</pre>

0rel: /* Firmware */

2016-05-13T19:34:59Z

Firmware

← Older revision		Revision as of 21:34, 13 May 2016
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	[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC5.zip cappaddy_TSC5.zip]		[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC5.zip cappaddy_TSC5.zip]

			crude 12-bit version:
			[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC7.zip cappaddy_TSC7.zip]

	[[File:Cappaddy_rev0.03_caseV4_DSCN1096.jpg]]		[[File:Cappaddy_rev0.03_caseV4_DSCN1096.jpg]]

0rel: /* BOM */

2016-04-25T01:13:25Z

BOM

← Older revision		Revision as of 03:13, 25 April 2016
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	To estimate the total price the PCB cost, casing, the touch pad material, optional power switch, 2 batteries, cables etc. need to be added (~20 Euros in total?).		To estimate the total price the PCB cost, casing, the touch pad material, optional power switch, 2 batteries, cables etc. need to be added (~20 Euros in total?).

	The price as well as the assembly work could be lowered A LOT by placing everything on one two-sided PCB. The touch pads, the tiny speaker (with a small tube on it?), the (coin cell) battery (enough capacity?). That would save one a lot of trouble with assembling the thing. A simple case to cover the sensitive parts can still be made. Another benefit of placing the touch pads on the PCB and cover it with solder mask is reliability I guess. Using custom pads with cables gives quite inconsistent results.		The price as well as the amount of assembly work could be lowered A LOT by placing everything on one two-sided PCB. The touch pads, the tiny speaker (with a small tube on it?), the (coin cell) battery (enough capacity?). That would save one a lot of trouble with assembling the thing. A simple case to cover the sensitive parts can still be made. Another benefit of placing the touch pads on the PCB and cover it with solder mask is reliability I guess. Using custom pads with cables gives quite inconsistent results.

	=== PCB ===		=== PCB ===

0rel: /* Tool: Serial Monitor */

2016-04-24T21:58:07Z

Tool: Serial Monitor

← Older revision		Revision as of 23:58, 24 April 2016
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	== Tool: Serial Monitor ==		== Tool: Serial Monitor ==

	~~While first always~~ using Processing to display serial data, I've discovered a nice python library to draw all kinds of plots and visualize data, called [http://matplotlib.org/ matplotlib]. It proved to be useful to display very basic serial debug data, like the 13 TSC channel values:		After using alway Processing to display serial data, I've discovered a nice python library to draw all kinds of plots and visualize data, called [http://matplotlib.org/ matplotlib]. It proved to be useful to display very basic serial debug data in realtime, like the 13 TSC channel values here:

	<pre>		<pre>

0rel: /* TODO */

2016-04-24T20:20:39Z

TODO

← Older revision		Revision as of 22:20, 24 April 2016
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	* change playback rate (timer)		* change playback rate (timer)
	* REX style loop player		* REX style loop player
	* loop samples + ~~fadout~~? loop points?		* loop samples + fadeout? loop points?

	* add button to change playback mode/preset etc.		* add button to change playback mode/preset etc.

0rel: /* Circuit */

2016-04-24T19:23:39Z

Circuit

← Older revision		Revision as of 21:23, 24 April 2016
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	[[File:cappaddy_rev0.03_schematics_2016-04-24.png]]		[[File:cappaddy_rev0.03_schematics_2016-04-24.png]]
			[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_rev0.03_schematics.pdf cappaddy_rev0.03_schematics.pdf]

	=== BOM ===		=== BOM ===

0rel: /* Firmware */

2016-04-24T19:10:01Z

Firmware

← Older revision		Revision as of 21:10, 24 April 2016
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	[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC5.zip cappaddy_TSC5.zip]		[http://0rel.com/prj/cappaddy/rev0.03/cappaddy_TSC5.zip cappaddy_TSC5.zip]

			[[File:Cappaddy_rev0.03_caseV4_DSCN1096.jpg]]

	== Tool: Serial Monitor ==		== Tool: Serial Monitor ==

0rel: /* Overview */

2016-04-24T19:06:49Z

Overview

← Older revision		Revision as of 21:06, 24 April 2016
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	A work-in-progress prototype to try out different things with capacitive touch interfaces and learn more about ARM dev, STM32's peripherals (SPI, TIMER, DAC, DMA, TSC...) and some nice new parts like SPI flash, a new mono audio amp and a 3.3V voltage regulator/boost-converter, ideal for normal AAA cells.		A work-in-progress prototype to try out different things with capacitive touch interfaces and learn more about ARM dev, STM32's peripherals (SPI, TIMER, DAC, DMA, TSC...) and some nice new parts like SPI flash, a new mono audio amp and a 3.3V voltage regulator/boost-converter, ideal for normal AAA cells.

			[[File:cappaddy_rev0.03_caseV4_DSCN1111.jpg]]

	= Hardware (Electronics) =		= Hardware (Electronics) =

0rel: /* Hardware (Enclosure) */

2016-04-24T19:06:09Z

Hardware (Enclosure)

← Older revision		Revision as of 21:06, 24 April 2016
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	STLs: [http://0rel.com/prj/cappaddy/rev0.03/cappaddy1_case_v4_STL.zip cappaddy1_case_v4_STL.zip]		STLs: [http://0rel.com/prj/cappaddy/rev0.03/cappaddy1_case_v4_STL.zip cappaddy1_case_v4_STL.zip]

			[[File:cappaddy_rev0.03_caseV4_DSCN1043_600.jpg]]

	= Software =		= Software =

0rel: /* Hardware (Enclosure) */

2016-04-24T19:05:44Z

Hardware (Enclosure)

← Older revision		Revision as of 21:05, 24 April 2016
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	STLs: [http://0rel.com/prj/cappaddy/rev0.03/cappaddy1_case_v4_STL.zip cappaddy1_case_v4_STL.zip]		STLs: [http://0rel.com/prj/cappaddy/rev0.03/cappaddy1_case_v4_STL.zip cappaddy1_case_v4_STL.zip]

	~~[[File:cappaddy_rev0.03_caseV4_DSCN1043_600.jpg]]~~

	= Software =		= Software =