用 sblAppEx.exe 烧2640R2F的时候出现错误，错误提示见正文。

我已经把2640R2F 的host_test.bin 转成bin文件，并且重命名为：blinky_backdoor_select_btn2650.bin

+-------------------------------------------------------------
| Serial Bootloader Library Example Application for CC2650
+-------------------------------------------------------------

+-------------------------------------------------------------
| COM ports:
+-------------------------------------------------------------
|Idx | Description
| 0 | USB Serial Port (COM1)
| 1 | USB Serial Port (COM5)
| 2 | XDS110 Class Application/User UART (COM7)
| 3 | XDS110 Class Auxiliary Data Port (COM8)
+-------------------------------------------------------------

Select COM port index: 0

Connecting (COM1 @ 230400 baud) ...
100% (501.00ms)
Erasing flash ...
100% (1014.00ms)
Writing flash ...
Warning: CC2650 bootloader will be disabled.
99% Timed out waiting for ACK/NAK. No response from device.
Error during flash download. Failed to read device status.
- Start address 0x0001FEE4 (page 31).
- Tried to transfer 252 bytes.
- This was transfer 520 in chunk 0.

An error occurred: 3

1、主机和目标板之间的接线是不是过长？

2、试下降低速度是否能改善

谢谢, 硬件正在帮我准备环境

把线调短了也不行

是不是 2650 和2640r2f 在flash的配置上有些许差距造成的?

板子是自己做的吗？

不是

用的官方的开发板