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CCS/IO-EXPANDER-EVM: Interface forum

Riffin Li
Prodigy 10 points
Part Number: IO-EXPANDER-EVM
Other Parts Discussed in Thread: TCA6424A

Tool/software: Code Composer Studio

Hi

 I use IO Expander EVM to do IO port expansion experiment，as the User's Guide show 

My first question is the User's Guide descript that “flashes the firmware to the LaunchPad using the MSP430Flasher.exe and IO_Expander.txt Files” But I failed try to do this.I wander that update the firmware without link the emulator and setup driver? could you please explain the steps to update the firmware? 

Second question is when test TCA6424A, set GUI to control P02 (P02_24 on PCB) and P03 (P03_24 on PCB) the IO Expander EVM and the respective LEDs,There are no check-box besides  P02 and P03 and it can not turns on or off  the LED when uncheck the "P02/P03 OUT items" of EVM. Thanks a lot !

Best regards!

Riffin Li

  • 0
    TI__Guru 73061 points

    Hey Riffin,

    Can you confirm which MSP430 EVM you are using?

    We've recently been seeing customers who want to evaluate the IO expander EVM have issues with flashing the MSP430 EVMs due to the newer EVMs not being compatible with the software developed for the IO Expander EVM. The previous MSP430 boards did work with the software but have since been discontinued.

    The work around would be to utilize the MSP430 to do communication with the IO Expander EVM by setting two pins on the MSP430 to be open drain (SDA and SCL) and running the I2C library and send I2C traffic to our device on the IO expander EVM rather than trying to use the GUI. <-- is this something you could do if we provided example code for you?

    Thanks,

    -Bobby