USB Mass Storage Device Programming

mtuxpe — Wed, 06 Feb 2019 22:25:16 GMT

Hi all,

I am trying to develop a new app for Rapid IoT.

According page 108 of User's Guide I need to transfer my bin file to Rapid IoT USB storage.

After moving min bin to storage nothing happens( green LED is blinking).

It seems that bootloader ignores my bin file.My program was tested on KW41Z kit.

On page 110 of User's Guide:

"Bootloader will automatically identify the MCU target to reprogram thanks to the binary file signature."

Maybe I need to sign my bin file.Where I can find details of binary signature?

Best regards,

Marcio Montenegro

Re: USB Mass Storage Device Programming

Eric_Ma — Fri, 08 Feb 2019 10:25:22 GMT

Hello,

The boot loader is looking at the position of the reset vector to distinguish between 2 binaries targets.

On K64f it is around 0x14Fxxx and in KW41 it is around 0X4xxx

You can check it from the kboot code: (usb_device_msc.c; around line 550)

if(lbaData.buffer[6]==0x01 && lbaData.buffer[7]==0x00 && tval==0x40)

{

if(AppProgMode==MODE_MSD_FACT || AppProgMode==MODE_FACT_USER)

MSD_Cur_Img_Type = FICA_IMG_TYPE_K64F_FACT;

else

MSD_Cur_Img_Type = FICA_IMG_TYPE_K64F_USER;

BadBinaryFile = false;

TransferStarted = true;

}

else if(lbaData.buffer[6]==0x00 && lbaData.buffer[7]==0x00 && tval==0x40)

{

if(AppProgMode==MODE_MSD_FACT || AppProgMode==MODE_FACT_USER)

MSD_Cur_Img_Type = FICA_IMG_TYPE_K41Z_FACT;

else

MSD_Cur_Img_Type = FICA_IMG_TYPE_K41Z_USER;

BadBinaryFile = false;

TransferStarted = true;

}

else

{

BadBinaryFile = true;

}

Be aware that if you write a program before address 0x14000 in the memory, you will overwrite the boot loader and consequently you loose this drag and drop functionality. This is a common error leading to 'blocking kits'

topic USB Mass Storage Device Programming in Rapid IoT

USB Mass Storage Device Programming

Re: USB Mass Storage Device Programming