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 on: September 20, 2023, 08:25:21 PM 
Started by xenon68 - Last Post by xenon68
Tools: Vinculum ii IDE
Chip: 32pin VNC2
Application size has plenty of flash left, only at 227000 bytes.

For some reason when I write a single page of flash, the SPI device stops working...  any ideas?

Basically this is all I am doing, then after that the SPI stops working. Tried other page locations.  What is odd, is the flash write works. I can restart, and read the correct data from the flash.

flash_writePage(0x7ff, temp_string);

 on: August 22, 2023, 10:34:48 AM 
Started by bryantsorensen - Last Post by FTDI Community
HI Petrov,

We are not sure when the next update for the library will be released, however, as the source code is available on the website, customers can make their own changes and rebuild the library for their own use.

Customers can also develop their own code using D2XX direct driver. You can have a look at Command Processor For MPSSE and MCU Host Bus Emulation Modes this will allow you to not rely on LibMPSSE.

Best Regards
FTDI Community 

 on: August 21, 2023, 09:07:43 PM 
Started by bryantsorensen - Last Post by Petrov
Is there any update on this issue?
When can we expect the next release of the library?

 on: August 21, 2023, 03:33:12 PM 
Started by FTDI Community - Last Post by FTDI Community
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FTDI Community

 on: August 15, 2023, 04:20:12 PM 
Started by kiran - Last Post by FTDI Community

When using LibMPSSE, GPIOL[0:3] can only be used as SPI chip selects.
When using LibMPSSE, there is no way to control GPIOL[0:3] as GPIO.
LibMPSSE demonstrates controlling the higher line bytes (GPIOH) while using SPI on the lower line bytes using the following functions:
If you want to control some of the unused lower line bytes on the same ADBUS as SPI then see AN_411 FTx232H MPSSE I2C Master Example in C which demonstrates GPIO usage with MPSSE using D2xx direct (not using LibMPSSE).
This could be used as a base to understand using both I2C/GPIO in the same code.

Best Regards,
FTDI Community

 on: August 15, 2023, 04:16:01 PM 
Started by logcat00 - Last Post by FTDI Community

According to LibMPSSE-SPI User Guide when using our MPSSE library it's possible to run at 30Mhz:

uint32 ClockRate
This parameter takes the value of the clock rate of the SPI bus in hertz. Valid range for ClockRate is 0 to 30MHz.

So you can maybe try with our library which has source code provided for reference.

These also may be useful to you:

AN_114 Interfacing FT2232H Hi-Speed Devices To SPI Bus
AN_180 FT232H MPSSE Example – USB Current Meter using the SPI Interface

Other software examples exist:


Also please also note, SPI modes 1 and 3 are not supported with our MPSSE engine.
So please check that your SPI device doesn’t work with these modes.

We also have a support office in Taiwan.

Best Regards,
FTDI Community

 on: August 14, 2023, 05:07:19 PM 
Started by logcat00 - Last Post by logcat00
hi ~
May I ask if using the 0x13 command and 0x11 command can achieve an SPI speed of 30 MHz?
I have found that 3-line SPI (9-bit) cannot achieve 30 MHz. Is there a 9-bit command available?
see AN_108 Command Processor For MPSSE and MCU Host Bus Emulation Modes .
thank you so mcuh!!

 on: August 07, 2023, 10:35:28 AM 
Started by kiran - Last Post by kiran
Iam using FT2232h module in MPSSE mode for I2c  and how the remaining 4 pins(ADBUS4-ADBUS7) works,iam using libmpsse library 

 on: August 03, 2023, 04:34:48 PM 
Started by allenhuffman - Last Post by FTDI Community

When FT_SetTimeouts() is not used, standard d2xx read and write API's would not return as they are blocking calls.

When FT_SetTimeouts() is set to say 5 seconds, that would give plenty time for Read and Write API calls and it would return if there were any issues with the Read or Write.

Best Regards,
FTDI Community

 on: August 03, 2023, 04:34:44 PM 
Started by allenhuffman - Last Post by FTDI Community

When using our products in electrically noisy environments, you can try in section 5.1 Adjusting the Reset Pipe Retry Count of AN_107 Advanced Driver Options.

You can also edit the registry, opposed from editing the INF files which breaks driver signing.

Note that registry entry may need to be created:
The default value is 50 so you can try increasing to see if it has an effect.
This can stop USB disconnects in electrically noisy environments.

The above might be something additional to try to see if it helps, otherwise modify your hardware to cope in electrically noisy environments might be the best way forward and check if you are using a USB certified and shielded cable.

Best Regards,
FTDI Community

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