Search found 26 matches

by sheepdoll
Wed Oct 21, 2020 3:30 am
Forum: Projects
Topic: Ethernet bridge for old Kodak SCSI scanner
Replies: 3
Views: 63

Re: Ethernet bridge for old Kodak SCSI scanner

The pi is a target device (Typically a hard drive emulation.) I am looking for the other direction host initiator. The pi also requires level shifters. I already have this on the existing STM board. The small Nikon scanner is what put Kodak out of buisness. Seems strange that back in the mid 1990s f...
by sheepdoll
Tue Oct 20, 2020 10:55 pm
Forum: Projects
Topic: Ethernet bridge for old Kodak SCSI scanner
Replies: 3
Views: 63

Ethernet bridge for old Kodak SCSI scanner

I recently acquired an old Kodak pcd film scanner 2000. This is a suitcase sized behemoth that was state of the art back in 1995. I worked with the resulting scans when at apple back then. Part of one of the biggest and most unpopular products in history. The Kodak PhotoCD. When I was not at Apple I...
by sheepdoll
Sat Sep 12, 2020 1:36 am
Forum: STM32F4 based boards
Topic: STM32E407 Serial port 9 bits
Replies: 1
Views: 259

Re: STM32E407 Serial port 9 bits

I had a similar issue. In doing some research, there is no real difference between 8 bits with the 9th bit 0 and 9 bits with the 9th bit 0. This is what the start bits are for in Async transmission. They tell the system when to start clocking bits. Then come the parity bits. The stop bit is basicall...
by sheepdoll
Fri Jun 05, 2020 4:52 pm
Forum: General discussion
Topic: Mac OS X 10.15.2 catalina, cube MX and sw4stm32
Replies: 3
Views: 1317

Re: Mac OS X 10.15.2 catalina, cube MX and sw4stm32

This is a pretty old thread. I installed the Stm32CubeIDE recently and it works much better. I never did figure out why I can not open .ioc projects in MX apart from the most recent one. Opening the same .ioc project in cubeIDE it loads direct. Same for generating the .ld file under CubeMX. I no lon...
by sheepdoll
Thu Jun 04, 2020 2:17 am
Forum: STM boards (Discovery, Eval, Nucleo, ...)
Topic: UDP Communication and an addtional SPI connection, STM32duino
Replies: 2
Views: 1392

Re: UDP Communication and an addtional SPI connection, STM32duino

Yes, If you want to use ETH, you have to move some straps on the Nucleo. These are called out in the app note for the Nucleo board. There may have been some discussion on Stack exchange which pointed to this. For some reason ST did not mount the 8Mhz crystal on the 144 pin STM32F429 Nucleo either. T...
by sheepdoll
Thu Jun 04, 2020 1:50 am
Forum: Off topic
Topic: Little-known Japanese CPU threatens to make Nvidia, Intel and AMD obsolete in HPC market
Replies: 4
Views: 984

Re: Little-known Japanese CPU threatens to make Nvidia, Intel and AMD obsolete in HPC market

Top link to techradar is paywalled. Well it complains about the ad blocker and wants you to pay for subscription. Guess I am to old. I remember when information wants to be free. Now the new aggregators are charging for other peoples data ... I have no intention of white listing the site. Most of th...
by sheepdoll
Fri May 22, 2020 5:48 am
Forum: IDE's
Topic: watch memory allocation c++ libraries SW4STM32
Replies: 8
Views: 1758

Re: watch memory allocation c++ libraries SW4STM32

I got it working. _sbrk was indeed the key. Put a breakpoint there and it was exactly what I wanted. I could see the end of heap pointer. To use placement new, one also has to '#include <new>" which is a bit of a strange syntax. I guess <new> maps to new.h That said it was not a clean solution. If t...
by sheepdoll
Wed May 20, 2020 9:47 pm
Forum: IDE's
Topic: watch memory allocation c++ libraries SW4STM32
Replies: 8
Views: 1758

Re: watch memory allocation c++ libraries SW4STM32

So putting a simple array into CCMRAM works Putting the stack into CCMRAM fails at the first call to new. It seems from the mangled disassembly of the new() implementation malloc is returning an exception. Not sure where SW4STM32 keeps it's library source for things like malloc. Next up will be to t...
by sheepdoll
Wed May 20, 2020 4:41 am
Forum: Let us know a bit about you and your projects
Topic: Hello all from Essonne
Replies: 2
Views: 889

Re: Hello all from Essonne

Welcome to the forums; I have been working with pipe organ controllers for many years (Decades?) There are a number of virtual organ systems out there. I work with theater organs which are VTPO. I also understand there are Virtual Hammond organs (VHOs) and a lot of VPOs which are virtual pipe organs...
by sheepdoll
Tue May 19, 2020 1:34 am
Forum: IDE's
Topic: watch memory allocation c++ libraries SW4STM32
Replies: 8
Views: 1758

Re: watch memory allocation c++ libraries SW4STM32

Yeah that is what I am experimenting with. I found a reference to a 'post link' option called --format=sysv which gives a more verbose map of the memory usage. found an interesting description on the OpenSTM32 web page. https://www.openstm32.org/Using%2BCCM%2BMemory I think when combined with this p...

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