I'm trying to program the F7 option bytes via the UART bootloader using the command-line or GUI programmer and get an error. Other commands work fine. Here is the output:
14:00:24 : STM32CubeProgrammer API v2.0.0
14:00:36 : Serial Port COM9 is successfully opened.
14:00:36 : Port configuration: parity = even, baudrate = 115200, data-bit = 8, stop-bit = 1.0, flow-control = off
14:00:36 : Activating device: OK
14:00:36 : Chip ID: 0x449
14:00:36 : BootLoader protocol version: 3.1
14:00:37 : Response received from device: NACK
14:00:37 : Error: Address not acknowledged: 0x0
14:00:38 : UPLOADING OPTION BYTES DATA ...
14:00:38 : Bank : 0x00
14:00:38 : Address : 0x1fff0000
14:00:38 : Size : 44 Bytes
14:00:39 : UPLOADING ...
14:00:39 : Size : 1024 Bytes
14:00:39 : Address : 0x8000000
14:00:39 : Read progress:
14:00:40 : Data read successfully
14:00:40 : Time elapsed during the read operation is: 00:00:01.229
14:00:51 : Option byte command : -ob BOOT_ADD1=0x90
14:00:51 : PROGRAMMING OPTION BYTES AREA ...
14:00:51 : Bank : 0x00
14:00:51 : Address : 0x1fff0000
14:00:51 : Size : 44 Bytes
14:00:52 : Response received from device: NACK
14:00:52 : Error: GETID command not acknowledged!
14:00:52 : Reemission of GetID command
14:00:52 : Response received from device: NACK
14:00:52 : Error: GETID command not acknowledged!
14:00:52 : Reemission of GetID command
14:00:52 : Response received from device: NACK
14:00:52 : Error: GETID command not acknowledged!
14:00:52 : Response received from device: NACK
14:00:52 : Error: Write Command not acknowledged at address 0x1FFF0000
14:00:52 : Error: Downloading Option Bytes Data failed
14:00:52 : UPLOADING OPTION BYTES DATA ...
14:00:52 : Bank : 0x00
14:00:52 : Address : 0x1fff0000
14:00:52 : Size : 44 Bytes
14:00:52 : Response received from device: NACK
14:00:52 : Error: READ command not acknowledged at address: 0x1FFF0000
14:00:52 : Error: Uploading Option Bytes bank: 0 failed
14:00:54 : Timeout error occured while waiting for acknowledgement.
14:00:54 : Error: GETID command not acknowledged!
14:00:54 : Reemission of GetID command
14:00:54 : Response received from device: NACK
14:00:54 : Error: GETID command not acknowledged!
14:00:54 : Reemission of GetID command
14:00:54 : Response received from device: NACK
14:00:54 : Error: GETID command not acknowledged!
