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 1 
 on: February 06, 2023, 02:27:54 PM 
Started by steve - Last Post by Mikexx
Hello,

This version of the library has now been released on the website: https://ftdichip.com/software-examples/mpsse-projects/.

The changes and improvements made in this version are shown in the release notes text file in the library download.

FTDI Community

Many thanks. I had already come across this version (v1.0.3), and it still has a cmdBuffer[] size of 10 for SPI_ReadWrite().

I can see there were some minor changes from v0.6, ie some commented out lines.

It's also confusing as the "Rivision History" (yes that is how 'revision' is spelled in FTDI_SPI.c) bear no resemblance to the library version. Furthermore the library is dated 2014. Hence my assumption the referenced beta version might be more recent.


 2 
 on: February 06, 2023, 01:20:12 PM 
Started by steve - Last Post by FTDI Community
Hello,

This version of the library has now been released on the website: https://ftdichip.com/software-examples/mpsse-projects/.

The changes and improvements made in this version are shown in the release notes text file in the library download.

FTDI Community

 3 
 on: February 06, 2023, 12:43:32 PM 
Started by steve - Last Post by Mikexx
Hi,

we have a new beta version of LibMPSSE that you can try. if you email in to support1@ftdichip.com i can tell you how to access the beta.

Best Regards

FTDI Community

What are the improvements to this library? Is it accessible by other users?

 4 
 on: February 06, 2023, 12:30:20 PM 
Started by Eisenheim - Last Post by Mikexx
Hi,

I have been using the ft2232H board with libmpsse module for SPI reading in windows/raspberry pi. In both cases, I read 3KB of data with 20Mhz frequency. It takes about 4ms seconds for every read. My problem is that when I read 20 minutes one or two times the read time goes above 100ms. Is it related to ftdi driver issue?

Regards,
Eisenheim

Are you using c#? Typically the PC will hiccup through garbage collection but 100ms is a bit high.

What's the spec of your PC?

I would recommend using an application like Latencymon to check native PC latency.

 5 
 on: February 06, 2023, 01:44:06 AM 
Started by Mikexx - Last Post by Mikexx
I have discovered the MPSSE library as per:
  https://ftdichip.com/software-examples/mpsse-projects/libmpsse-spi-examples/

I would like to use the SPI_ReadWrite() function.

While this works from the last clock to the CS going high is some 250ms, which is unusable.
I also had to fix an issue with cmdBuffer[] size, implying this library function has never been debugged. Furthermore the CS pin goes high for just 1.8us between sending a SPI_Write() and a SPI_ReadWrite().

I would like to use the Read/Write facility as it saves a resending of a message where the STM32F4 device I am interfacing might miss the odd packet.

The alternative is a SPI_write() followed by multiple SPI_Reads() and an overall retry which isn't going to be so efficient.

There are seemingly a number of other libraries such as "FT2232HS_SPI->VC++_200" but some of these go back 13 years and haven't been updated to current Visual Studio standards so don't instil any confidence.

Is there another way forward? I would be grateful for others' experiences.

 6 
 on: January 30, 2023, 09:46:35 AM 
Started by jberkhout - Last Post by FTDI Community
Hello,

Please post any new or replies on the BRT Community as Bridgetek support EVE products:

http://www.brtcommunity.com/

Best Regards,
FTDI Community

 7 
 on: January 30, 2023, 09:44:57 AM 
Started by jberkhout - Last Post by FTDI Community
Hello,

Please post your question of the BRT Community as Bridgetek support EVE products:

http://www.brtcommunity.com/

Best Regards,
FTDI Community

 8 
 on: January 27, 2023, 08:07:34 PM 
Started by jberkhout - Last Post by jberkhout
It regulates the brightness more according the non-linear sensitivity of the eye, so say 50% appears more like 50% for the eye.

 9 
 on: January 27, 2023, 07:26:47 PM 
Started by jberkhout - Last Post by jberkhout
I use an STM32F7 MCU, it can render bitmaps and store them on an SD card.
Then, if they exist, they can just be loaded, and don't need to be rendered again, which is quicker.
Though I can load them as uncompressed binary files only.
However I would like to compress them as the EVE Asset Builder can do, so I can load smaller files, even quicker.

Currently I would need to transfer them from the SD card to the computer, convert them, load them in Asset Builder, convert them into compressed bin format and then copy them back to the SD card.
It is quite cumbersome. If it could be compressed by the MCU that would be awesome.
What compression algorithm is used? Is it documented?

Any help would be very welcome.

 10 
 on: January 20, 2023, 02:49:04 PM 
Started by dUb - Last Post by FTDI Community
Hi,

This is likely an issue with your custom firmware, you could try using one of our precompiled firmware like V2DAP, to see if you are seeing the same degradation. You could also use VNC2 tools to debug and analyse. There are some code analysis tools built in. 

you could also try applying the SP3 patch to the VNC2 toolchain, and then rebuild. If you email into support1@ftdichip.com we can give you the details on how to access the patch.

Best Regards

FTDI Community

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