AWR1642: How to use the WRITE TO FLASH command without uniflash tool? (LENGTH bytes)

Kris Lin

Intellectual 810 points

Part Number: AWR1642

Hi,

I posted the similar question last week, as bellows:

https://e2e.ti.com/support/sensor/mmwave_sensors/f/1023/p/652346/2399543

And the checksum calculation is ok.

I use OPEN command and Close command and receive the ACK response from the device.

But the WRITE TO FLASH command is still not work.

According to the doc. <SWRA551, page15>, the WRITE TO FLASH command have the LENGTH bytes.

The packet size have 256 bytes <SWRA551, page13>.

But I don't understand how to calculate the LENGTH bytes exactly.

I had tried many method to calculate the LENGTH bytes, but not ACK response from the device.

=============================================================

My question is how to calculate the LENGTH bytes and the command work fine?

Thanks.

over 7 years ago

0 Prathyusha Inuganti over 7 years ago

TI__Intellectual 800 points

Hi Kris,

The length field for any packet is computed as:

length field = size of data in bytes (including the opcode) + 2 bytes.

So, for the WRITE to FLASH command the length field would be:

length field = size of data to be written + 1byte (for opcode of WRITE to FLASH command) + 2 bytes.

Regards,

Prathyusha Teja.I

0 Kris Lin over 7 years ago in reply to Prathyusha Inuganti

Intellectual 810 points

Hi Prathyusha Teja.I,
I had tried, but no ACK response from device for first packet.
For example,
The write to flash command packet is:
oxAA + length(257) + checksum + 0x24 + payload(254 bytes)

is the write command packet correctly?
I tried this write command, but no ACK.

Thanks

0 Prathyusha Inuganti over 7 years ago in reply to Kris Lin

TI__Intellectual 800 points

Kris,

Could you limit the total packet size to be less that 256bytes?

Could try the below configuration?
0xAA + length(243) + checksum + 0x24 + payload(240 bytes)

Regards,
Prathyusha Teja.I

0 Kris Lin over 7 years ago in reply to Prathyusha Inuganti

Intellectual 810 points

Hi Prathyusha Teja.I,

I tried this configuration < 0xAA + length(243) + checksum + 0x24 + payload(240 bytes) >, but no ACK.
I also tried < 0xAA + length(203) + checksum + 0x24 + payload(200 bytes) >, but still no ACK.

0 Prathyusha Inuganti over 7 years ago in reply to Kris Lin

TI__Intellectual 800 points

Hi Kris,

Do you have a delay between the open command and the WRITE to FLASH command?
If not, could you try by having a few ms delay between both the commands?

Also, could post the UART dump of the WRITE to FLASH command?

Regards,
Prathyusha Teja.I

0 Kris Lin over 7 years ago in reply to Prathyusha Inuganti

Intellectual 810 points

Hi Prathyusha Teja.I,

Sorry for the late reply.

1.I tried to add 500ms delay between both the commands, , but no ACK.
2.The first packet are as follows:
< 0xAA + length(203) + checksum + 0x24 + payload(200 bytes) >

AA00CB85244D5354520300000037000000CC3013BE39534B7200BD0600010000000000513580000000EA9DDFFD2C7CE934B8530100000000000000000001000000000051B5405401006EE622E6648E1A0390FA0200000000000000000001000000000051D5004F0400FD5D0F95058DA403F06D02000000000000000000050000014D454E445250524354EC00000000000004000000010000000000000000000000000000003C00000000000000000000000000000018F09FE518F09FE518F09FE518F09FE518F09FE518F09FE5

Thanks.

0 Kris Lin over 7 years ago in reply to Kris Lin

Intellectual 810 points

Hi Prathyusha Teja.I,

I tried to use WRITE TO RAM command (0x26), it seems to have ACK response.

The first packet is as follows:
===================
Open File
0004CC00CC
Write to sFlash ...
AA00CB87264D5354520300000037000000CC3013BE39534B7200BD0600010000000000513580000000EA9DDFFD2C7CE934B8530100000000000000000001000000000051B5405401006EE622E6648E1A0390FA0200000000000000000001000000000051D5004F0400FD5D0F95058DA403F06D02000000000000000000050000014D454E445250524354EC00000000000004000000010000000000000000000000000000003C00000000000000000000000000000018F09FE518F09FE518F09FE518F09FE518F09FE518F09FE5
0004CC00CC
===================

So, what happens about the WRITE TO FLASH command (0x24)?

Thanks.

0 Kris Lin over 7 years ago in reply to Kris Lin

Intellectual 810 points

Hi Prathyusha Teja.I,

Have any solution about this question so far?

Thanks.

0 Kris Lin over 7 years ago in reply to Kris Lin

Intellectual 810 points

Hi Prathyusha Teja.I,
After probing the output from the CLI port, the "write to flash" command is working.

Thanks.

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AWR1642: How to use the WRITE TO FLASH command without uniflash tool? (LENGTH bytes)