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Original question:

EVM430-FR6047: I2C communication error

EVM430-FR6047: Communication protocol 0x81 write command

Ole Johannessen
Prodigy 40 points

Part Number: EVM430-FR6047

Hi,

I am trying to build Labview interface to the EVM430-FR6047, by using a 3 party USB-i2c interface connected to the comm-sda and comm-sdl jumper pins on J1.

The EVM430-FR6047 is running the standard flow software, and works together with the USS GUI from TI.

When testing the communication using the 3 part USB-i2C interface, I get the same response as discussed in this forum earlier (See https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/831903/evm430-fr6047-i2c-communication-error)

This should indicate that I am able to communicate with the EVM430-FR6047.

When I connect my oscilloscope to the RF output (ch0), I see the RF burst with N number of pulses. When I try to change the number of pulses with the 0x81 chain,I would expect to be able to set the number of pulse.

For example 0x55 0xAA 0x09 0x04 0x81 0x1 0x14 0x0 0x0 0x0 0x9A 0x00, should set the number of pulses to 0x14 or  20 in decimal. This is not working since the number of pulses do not change. 

Is there any steps I have missed ?

Thanks a lot in advance..

Ole

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