MSP430F6726: DFU via BLE UART

Hi Sivashankar,

Not sure if you have already seen these documents.  They may provide some guidance.  I'll ask around to see if anyone on our team may have some thoughts.

https://www.ti.com/lit/an/slaa511a/slaa511a.pdf

https://www.ti.com/lit/an/slaa721e/slaa721e.pdf

Hi Dennis,

Thanks for sharing those, on a very first look, Both of this documents considering MSP430FRxxx as reference. Would it be good to follow the same with msp430f6726.

Thanks,

Sivashankar

Hi Sivashankar,

Ok, if I understand your setup, the BLE radio interfaces to the MSP430 with UART.  To program the MSP430, The BLE device would need to connect to the additional pins,  RST and TEST.  The RST and TEST pins are used to put the MSP430 into BSL mode (this is called the hardware entry method).  The BLE would need to following the BSL commands described in section 3 (protocol) in the document  SLAA319 Flash Devices Bootloader.

Does this help?

Hi Dennis,

Before getting into BLE connection I start with BSL 1st. I've connected the Reset and Test pin to arduino to toogle MSP into BSL mode, and it's working  with a BSA_ACK in BSL_uart  so now all good and I'm set to go.

I wrote a python script to construct BSL commends https://1drv.ms/u/s!ArCbXDYx3yjAgU70bq-dflpNhiAh?e=2aiuOU

@4000
81 00 00 3C B1 13 30 00 0C 43 B1 13 00 00 1C 43 
B1 13 2A 00 32 D0 10 00 FD 3F 03 43 
@ffd0
14 40 14 40 14 40 14 40 14 40 14 40 14 40 14 40 
14 40 14 40 14 40 14 40 14 40 14 40 14 40 14 40 
14 40 14 40 14 40 14 40 14 40 14 40 14 40 00 40 
F1 03 B2 40 80 5A 5C 01 D2 D3 04 02 D2 E3 02 02 
B1 40 40 42 00 00 81 93 00 00 F8 27 91 83 00 00 
81 93 00 00 F3 27 FA 3F 03 43 03 43 FF 3F 03 43 
1C 43 10 01 
q

filelike = open("led.txt")
data = load(filelike)
#version cheack
con_data_write(BSL_VERSION, b'')
#mass errase
con_data_write(BSL_MASS_ERASE, b'')
#send password
con_data_write(BSL_RX_PASSWORD, b'\xff' * 32)
#version cheack
con_data_write(BSL_VERSION, b'')
for n in range(len(data)):
if len(data.segments[n].data) & 1:
print("Yes appending!", len(data.segments[n].data))
data.segments[n].data += '\xff'
block = bytearray(three_bytes(data.segments[n].startaddress).encode()) + data.segments[n].data
con_data_write(BSL_RX_DATA_BLOCK, block)

***detailed code is given here https://1drv.ms/u/s!ArCbXDYx3yjAgU70bq-dflpNhiAh?e=2aiuOU ****

#Debud output
8 <class 'bytes'> b'\x00\x80\x02\x00;\x04\xe4\x84' 008002003b04e484 (Version)
8 <class 'bytes'> b'\x00\x80\x02\x00;\x00`\xc4' 008002003b0060c4  (Mass Erase)
8 <class 'bytes'> b'\x00\x80\x02\x00;\x00`\xc4' 008002003b0060c4   (Password)
11 <class 'bytes'> b'\x00\x80\x05\x00:\x00\x07\x05\x04\xada' 008005003a00070504ad61 (Version after unlock)
8 <class 'bytes'> b'\x00\x80\x02\x00;\x00`\xc4' 008002003b0060c4 (Block @4000 write)
8 <class 'bytes'> b'\x00\x80\x02\x00;\x01A\xd4' 008002003b0141d4  (Block @ffd0)

at block ffd0 I'm getting crc error, I'm not sure why? If my crc calc function is wrong how come other commands are working.
If my crc calc is working what's going wrong with ffd0 block

I'm using ccs 10 with Hex utility output format options Output TI-Txt hex format.

Hi Sivashankar,

I spent some time digging into this and to be honest, based on what you are provided, I don't know why the BSL is returning a CRC error on that block of data.

Can you provide a .map and the linker command file .cmd for this project?