I'm trying to set up an i.MX_7Dual Sabre board for with the FreeRTOS BSP. I'm trying to run a blinking lights demo application. I'm at the point where I've connected to the board's serial debug port and am using a serial terminal (in my case PuTTY on Windows 10) in order to run the demo's binary file via TCM. However, when I start up the serial connection, I get no serial messages from the board at all and it doesn't seem to boot up. PuTTY still recognizes that there is serial connected and the board's debug LED's light up when I send keystrokes from the terminal, but not much else.