FTDI Community
General Category => Discussion - Software => Topic started by: kiran on August 07, 2023, 10:35:28 am
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Hi,
Iam using FT2232h module in MPSSE mode for I2c and how the remaining 4 pins(ADBUS4-ADBUS7) works,iam using libmpsse library
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Hello,
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:
FT_WriteGPIO
FT_ReadGPIO
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 (https://ftdichip.com/wp-content/uploads/2020/08/AN_411_FTx232H-MPSSE-I2C-Master-Example-in-Csharp.pdf) 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