Increase blhost download speed with FRDM-K64

[yash_bhatt1]

Hi,

We are using blhost to download firmware image after initially flashing bootloader via JTAG.

We are using the default kinetis bootloader.

We are observing a transfer speed of 16.8 KB/sec.

As we are thinking of using blhost in production environment, and so want to increase the speed of flashing over USB using blhost.

The command we are firing is :

./blhost -u -- write-memory 0x28000 firmware.bin

Is it possible to optimize the time used for flashing here?

Regards

[diego_charles · Accepted solution]

Hi Yash,

Unfortunately, we do not provide an option to increase the transfer speed using USB.

However, using UART the default baud rate is  57600. As the following note implies, this is the maximum baud rate supported for this protocol.

Supported baud rates: The baud rate is closely related to the MCU core and system clock frequencies. Typical baud rates supported are 9600, 19200, 38400, and 57600. Of course, to influence the performance of autobaud detection, the clock configuration in BCA can be changed.

From  chapter 6.4UART peripheral of  MCU Bootloader v2.5.0 ReferenceManual 

I hope this helps,

Best regards, Diego.

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