I’m having trouble connecting to the ODYSSEY STM32MP157C Evaluation Board. I’ve tried a USB to UART cable (Adafruit model 954) and a USB C cable (Belkin F2CD084bt0.5MBK) according to the instructions on the ODYSSEY STM32MP157C wiki page.
For the USB to UART cable, I connected the RX, TX, and Gnd lines (with and without 5V as well) according to the GPIO pinout (taking care to properly swap the TX and RX between the adapter and the evaluation board) and used a USB-C power supply (CanaKit 3.5A Raspberry Pi 4 Power Supply) to power the device. I tried to connect through both Windows (using PuTTY) and Linux (using screen). There was no response.
For the USB C cable, I’m currently only able to try Windows 10. I followed the link to the suggested Beagle Bone drivers, which required booting with the option to allow drivers that aren’t digitally signed. Device Manager doesn’t show any COMx ports active when the device is connected and powered up.
I’ve tried booting the device from both eMMC and a microSD card that I flashed according to the instructions. In each case, the device appears to boot and eventually shows a solid red LED and a rapidly blinking blue LED.
If both the red and blue LEDS flash, the system is on.The core hardware works fine.There is no content output in the serial port, so it is necessary to check the USB serial port device.You can short rX and TX for testing.
Thanks for your response. Perhaps the device is not working because both LEDs are not flashing as you indicated. The blue USER LED is blinking (two quick pulses then short pause and repeat) but the red PWR LED is on steady. I reflashed the SD card using Etcher according to the instructions, and I’ve again tried booting both from the SD card and eMMC.
I checked the USB UART adapter (by shorting TX and RX, opening PuTTY, typing some keys, and checking for echo to screen) and it works fine. According to the Raspberry Pi’s GPIO (https://www.raspberrypi.org/documentation/usage/gpio/) and the USB UART adapter (https://www.adafruit.com/product/954) I have black (Gnd) on pin 6, white (adapter RX from ODYSSEY TX) on pin 8, and green (ODYSSEY RX from adapter’s TX) on pin 10.
Hi @kdavies4
thanks for your feedback.we has been update this wiki. maybe you can view it. if you want to use UART to login system,the hardware connection like this.
