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Markus Gritsch
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HybridSID - Emulated CPU, Real SID Chip
1 Reply

Hi, I entered a blog post over a week ago, but since it still has not been approved, I decided to post it in the forum too: …Continue

Started this discussion. Last reply by atta williams Jun 18, 2012.

FatFs Example Project for USB Flash Drive
9 Replies

I was trying to achieve accessing an USB flash memory stick from my CUI32.  So I tried the "USB Host - Mass Storage - Simple Demo" from the "Microchip Solutions" folder, only to find out, that…Continue

Started this discussion. Last reply by atta williams Jun 18, 2012.

Floating point arithmetic in StickOS Basic?
2 Replies

Hi Rich,is there any plan to add floating point arithmetic to StickOS Basic?Continue

Started this discussion. Last reply by atta williams Jun 18, 2012.

Quarz crystal or ceramic resonator?
9 Replies

Hi,the 8MHz oscillator Y1 connected to OSC1 and OSC2 is according to EAGLE a RESONATOR-SMD.  Is this a ceramic resonator instead of a quarz, and if so, what is its frequency tolerance?MarkusContinue

Started this discussion. Last reply by atta williams Jun 18, 2012.

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Markus Gritsch posted blog posts
Jun 9, 2011
Markus Gritsch posted a discussion

HybridSID - Emulated CPU, Real SID Chip

Hi, I entered a blog post over a week ago, but since it still has not been approved, I decided to post it in the forum too: http://overtone-labs.ning.com/profiles/blogs/hybridsid-emulated-cpu-real """I made a SID-shield for my custom CUI32 board.  It contains a SID 8580R5 sound chip from a Commodore C64, an OLED display and a few buttons and switches for user input.  Schematics, firmware, and…See More
Jun 8, 2011
0 Comments
Markus Gritsch posted a blog post

Updated UBW32 from SparkFun

Hi,SparkFun now sells the USB 32-Bit Whacker (UBW32, don't confuse it with the CUI32 :) with a PIC32MX795.See More
Mar 9, 2011
0 Comments
Markus Gritsch commented on roland's blog post Battery power supplu to CUI32
"IMO it is not safe to connect 9V to the SparkFun boards.  We discussed this in the forum a few month ago http://overtone-labs.ning.com/forum/topics/zigflea-for-cui32?commentId=3789944%3AComment%3A1764   and the latest PCB version in SVN…"
Mar 4, 2011
Markus Gritsch replied to Calegatter's discussion Any plans for Arduino-type "Shields"?
"Øyvind Nyborg Hauback made a wireless module: http://overtone-labs.ning.com/forum/topics/zigflea-for-cui32"
Dec 3, 2010
Markus Gritsch replied to Bruce Robertson's discussion Voice Codec and Satellite Tracking Projects
"I ordered one using batchpcb.com and miraculously got two. I quite messed up the first one when using too mich soldering paste for the PIC32 and got the second one right. So, unfortunately, no PCB left. But go and let batchpcb.com fanufature one for…"
Nov 29, 2010
Markus Gritsch replied to Mike Watts's discussion Why does one project produce code that runs while another does not?
"Nice writeup. Thank you. "
Sep 21, 2010
Markus Gritsch replied to Mike Watts's discussion Why does one project produce code that runs while another does not?
"Sounds interresting. Maybe you want to post some photos, schematics, source code..."
Sep 18, 2010
Markus Gritsch replied to Mike Watts's discussion Why does one project produce code that runs while another does not?
"The procdefs.ld file is from the Microchip bootloader example folder. You can find it there. And yes, a linker script is always used."
Sep 17, 2010
Markus Gritsch replied to Mike Watts's discussion Why does one project produce code that runs while another does not?
"So you didn't search the forum for postings about the procdefs.ld file, well http://overtone-labs.ning.com/forum/topics/loading-and-running-newbie?commentId=3789944%3AComment%3A1678"
Sep 16, 2010
Markus Gritsch replied to Mike Watts's discussion Why does one project produce code that runs while another does not?
"The difference is most likely the 'procdefs.ld' file. You can search about this in this forum. Ask again if you cannot find it"
Sep 16, 2010
Markus Gritsch replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"I choose the PIC32MX795F512H because currently it is the top-of-the-line PIC32 (of the small package ones). It seems to have all the peripherals the lesser devices have, but have a look yourself at the parametic table:…"
Sep 14, 2010
Rich Testardi replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Or you could just connect your serial console to whatever pins are used for TX2 and RX2 on the MX7, of course."
Sep 14, 2010
Rich Testardi replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Hi Markus, Welcome to uart pin soup on the PIC32. :-( Basically, the relationship between uarts and ports is completely random between MCUs. Up to the MX5+, at least UART2 was consistent... Now even that one is not. So you'll have to change…"
Sep 14, 2010
Markus Gritsch replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"I already saw this and commented the HIDBL define. Guess what, the problem was that I had left the HOST/DECIVE switch on my selfmade CUI32 in the HOST position x-) After switching it to DEVICE, enumeration was flawless and communication worked fine…"
Sep 14, 2010
Rich Testardi replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Hi Markus, There are three things you have to be careful of on the compile, and unfortunately, I left the skeleton project in an indeterminate state for v1.72c (I'll fix that at v1.72d). 1. you have to do Configure -> Select Device,…"
Sep 14, 2010
Markus Gritsch replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Rich, I downloaded the skeleton project and compiled it for my self-made CUI32 using the PIC32MX795F512H. I made it pass the check in line 86 of basic0.c, but after programming, the device does not enumerate as a COM port, although the STATUS led is…"
Sep 13, 2010
Markus Gritsch replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Thank you Rich, I also had a look at the DOSFS website [1] before finding FatFs. The latest version of DOSFS is from 2006 and the site says version 1.03 contains bugs that will be fixed in 1.04, and this version never got released... Further the…"
Sep 12, 2010
Rich Testardi replied to Markus Gritsch's discussion FatFs Example Project for USB Flash Drive
"Hi Markus, If you get stuck there, I also have a low level usb driver, a block cache on top of it, and FAT16/32 filesystem on top of that. Most of it is in the skeleton project (http://www.cpustick.com/downloads.htm), but the rest is attached (I…"
Sep 11, 2010
Markus Gritsch posted a discussion

FatFs Example Project for USB Flash Drive

I was trying to achieve accessing an USB flash memory stick from my CUI32.  So I tried the "USB Host - Mass Storage - Simple Demo" from the "Microchip Solutions" folder, only to find out, that Microchips MDD library explicitely lacks LFN (long file name) support. (The working code is in the repository [1].)After some searching I found ChaN's excellent FatFs library [2].  Googling for Microchip and FatFs first only turned up this [3] application note from Microchip, which just has the MMC low…See More
Sep 10, 2010
8 Comments

Markus Gritsch's Blog

HybridSID - Emulated CPU, Real SID Chip



 

Hi,

 

I made a SID-shield for my custom CUI32 board.  It contains a SID 8580R5 sound chip from a Commodore C64, an OLED display and a few buttons and switches for user input.  Schematics, firmware, and some pictures of the project are available here:…

Continue

Posted on June 1, 2011 at 4:00pm

Maximite PIC32 BASIC Board

Hi,

 

the Maximite (http://geoffg.net/maximite.html) is another PIC32 board, which can be programmed in BASIC.  Its BASIC has even floating point numbers, and pixel-draw commands to draw graphics on a connected VGA or composite display.

 …

Continue

Posted on April 21, 2011 at 5:06pm

Updated UBW32 from SparkFun

Hi,

SparkFun now sells the USB 32-Bit Whacker (UBW32, don't confuse it with the CUI32 :) with a PIC32MX795.

Posted on March 9, 2011 at 11:11am

CUI32 as USB Soundcard

Hi,



I compiled the Microchip "USB Device - Audio - Speaker" example for the CUI32. The necessary code changes were straight forward to make. It took just a few minutes to get it working. The source code and the compiled .hex file for usage with the bootloader can be downloaded here:



http://cui32.googlecode.com/files/soundcard.zip



Audio out is available on RD0. The Microchip example uses just 8 bit PWM, so… Continue

Posted on September 3, 2010 at 10:12am — 1 Comment

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