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How to connect STM32F469 discovery kit to Silabs thunderboard 2 through USB ?

JulieJ
Associate

Hello, 

We're trying to connect an STM32F469 discovery kit and a Silabs thunderboard 2 through USB, in order to send data between the ST kit and a BLE device using Thunderboard 2.

There are two accessible UARTs on STM32F469 dev kit, UART3 which is also connected to USB ST-LINK and UART6, which is already used to connect another device.

So we try to connect UART3 of STM32 to UART of Silabs board. We've tested the following solutions :

TEST 1 : connect UART 3 STM32 (mini USB connector) <-> USB Thunderboard => not working 

TEST 2 : connect UART 3 STM32 (mini USB connector) <-> CP2120 micro USB - UART <-> UART Thunderboard => not working

TEST 3 : connect PC USB <-> USB Silabs => working to send and receive data

TEST 4 : connect PC USB <-> CP2120 micro USB - UART <-> UART Thunderboard => working to send and receive data

0693W000006FnnaQAC.png 

Is there a simple way to connect these two devices using STM32 mini USB connector and Thunderboard (UART pins or micro USB connector) ?

Thanks

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