LAUNCHXL-CC26X2R1: Flash issue in backdoor boot loader mode

Hi Kousalya,

Sorry for the delay in getting to you. To confirm, you are using the serial bootloader correct? Also, making sure you have this documentation: https://www.ti.com/lit/an/swra466d/swra466d.pdf?ts=1708206150771&ref_url=https%253A%252F%252Fwww.google.com%252F

I'm looping in someone from my team to help you. Please note, Monday is a TI holiday, so a response will likely come Tuesday. 

Hi Kousalya,

5s delay seems too long. Firstly can you make sure the serial boot loader is correctly entered? Secondly please check CC13x2, CC26x2 SimpleLink Wireless MCU Technical Reference Manual (Rev. F) (ti.com) for SPI setup. the maximum clock is 4M. And please do not keep sending commands in 100ms loop, but wait for response then send next command accordingly.

Best Regards,

Barbara 

Hi team,

1.How to check whether the chip entered into serial boot loader without sending PING command?

2.We are operating with 2M frequency and additionally there is no issue in normal communication

3.If we are following the below sequence, then also facing same issue.I will attach the log for further reference

send command(ex:CRC32) -> got response as 0 -> wait 500ms -> again send command

ble_flash_7.logble_flash_7.log