SK-AM64B: Issues with Flashing the SOC Initialization Binary

Part Number: SK-AM64B
Other Parts Discussed in Thread: UNIFLASH

I am attempting to setup the SK-AM64B EVM, and I am following the EVM Setup instructions under the AM64x MCU+ SDK. Under Flash SOC Initialization Binary. it states that a C character should be printed out every 2-3 seconds. In my setup I am seeing random characters (shown below).

I initially ignored this, but I am running into issues downstream when I try to run the commands to flash the SOC initialization binary to the device. Here's what I am getting:


C:\ti\mcu_plus_sdk_am64x_09_01_00_41\tools\boot>python uart_uniflash.py -p COM5 --cfg=sbl_prebuilt/am64x-sk/default_sbl_null.cfg

Parsing config file ...
Parsing config file ... SUCCESS. Found 2 command(s) !!!

Executing command 1 of 2 ...
Found flash writer ... sending sbl_prebuilt/am64x-sk/sbl_uart_uniflash.release.hs_fs.tiimage
Sending sbl_prebuilt/am64x-sk/sbl_uart_uniflash.release.hs_fs.tiimage: 0%| | 0/329349 [00:00<?, ?bytes/s][ERROR] Serial port [COM5] not found or not accessible !!!

C:\ti\mcu_plus_sdk_am64x_09_01_00_41\tools\boot>python uart_uniflash.py -p COM5 --cfg=sbl_prebuilt/am64x-sk/default_sbl_null.cfg

Parsing config file ...
Parsing config file ... SUCCESS. Found 2 command(s) !!!

Executing command 1 of 2 ...
Found flash writer ... sending sbl_prebuilt/am64x-sk/sbl_uart_uniflash.release.hs_fs.tiimage
Sending sbl_prebuilt/am64x-sk/sbl_uart_uniflash.release.hs_fs.tiimage: 0%| | 0/329349 [00:00<?, ?bytes/s]send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: expected NAK, CRC, EOT or CAN; got b'\xd1'
send error: error_count reached 10, aborting.
Sending sbl_prebuilt/am64x-sk/sbl_uart_uniflash.release.hs_fs.tiimage: 0%| | 2/329349 [00:23<2169:22:40, 23.71s/bytes
[ERROR] XMODEM send failed, no response OR incorrect response from EVM OR cancelled by user,
Power cycle EVM and run this script again !!!

Some assistance with this would be greatly appreciated.