CC2540 OAD: size of minimal A-image ?

I have the same question.

I was looking at the "Developer's Guide for Over Air Download for CC254x" version 1.0. The section 12 "Maximize the Image-B area" suggest that you can get the image size down to about 12K ( see the -D_CODE_BEG=0x0830 and -D_CODE_END=0x2FFF .. 0x2FFF - 0x0830 = 0x27CF or about 10.2 K Bytes. ), however the next page, at item 6. has OAD_IMG_A_AREA at 60, which I think are pages (one page is 2K, so 120K of space).

I think I've either mis-understood how these defines are being used, or they are saying two very different things.

[ EDIT 1]

* Same basic question is asked here: http://e2e.ti.com/support/low_power_rf/f/538/t/247590.aspx , they suggest they can get imgA down to about 80K.

[Edit 2]

* I used intelhex.py and python v2.7 to look at the CC2541DK_BIM_SensorTagOadImgA.hex file provided by TI in the BLE v1.3 release (under Accessories/HexFiles). By looking at 0x0800 + 6 and 0x0800 +7 in the hex file, I found that the Length was set to 0x7C00, which translates to 31744 . However, by looking at oad_target.c , we can see that the data in the len filed is the (Number of pages ) * (( Singe Page size ) / (write block size)) . In order to get the number of bytes total, we need to multiply by the write block size (see OAD_FLASH_PAGE_MULT which is (single Page size / write block size), and HAL_FLASH_WORD_SIZE which is write block size.

So the length of data in the Image A for the Sensor tag (in the BLE v1.3 release) is 31744 * 4 = 126,976 Bytes.

Data location was found by looking at the structure of img_hdr_t in oad.h, and using the -Z(CODE)CHECKSUM=0x0800-0x0801) to locate this item. Verified that it was the correct data by reading back the 0x65 ('A') from locations 0x0800 + 8,0x0800 + 9,0x0800 + 10,0x0800 + 11

I want to support Over The Air Firmup function of CC2541 Keyfob.

According to 《OAD_for_CC254x.pdf》document, I can't produce the binary file(. bin file).

on page 11 of 《OAD_for_CC254x.pdf》

"If this is your first time building with simple-code (.sim) output, you will have to build the project twice for the binary file to be produced."

But I have builded twice,still  didn't get the  binary file.

My IAR Version is :

Can you advice how to produce the binary file?

I was able to produce the .bin file manually using cc254x_sim2bin.exe file that was installed with the TI BLE Stack.

It is found here: (for stack version 1.3.1)

C:\Texas Instruments\BLE-CC254x-1.3.1\Projects\ble\common\cc2540\cc254x_sim2bin.exe

I called this from a command prompt (start menu, run, "cmd"), the use 'cd' to get to the directory shown above

The call is

cc254x_sim2bin.exe <name of sim file> <name of bin file>

e.g.

cc254x_sim2bin.exe SimpleBLEPeripheral.sim SimpleBLEPeripheral.bin

will create SimpleBLEPeripheral.bin from the file SimpleBLEPeripheral.sim

you can see how TI is doing this by looking in the .js file in the same directory as cc254x_sim2bin.exe

I got it,thank you very much!

Hi

Has anyone answered this question? I have the same issue where I am trying to minimize the imgA code size. I get around 102kB as well after stripping everything down.

I followed the OAD guide so that it reduces the imgA to about 81kB and extends the imgB area accordingly.

However, I can't get imgA size below 102kB! 

Did anyone ever find an answer to getting imgA down in size?

Hi

Could you show me how to create SimpleBLEPeripheral.bin from the file SimpleBLEPeripheral.sim by running the "cmd". attaching picture will be better. the BLE stack i use is 1.4.0 and instelled in E:\..........

Thanks in advance.

Hi KW Lee:

    Thanks for your help!