uniflash下载出现问题

用以前的uniflash下载时出现

[20:04:34] Begin ServicePackProgramming operation.
[20:04:35] INFO: > Executing Operation: Connect
[20:04:35] FATAL: --- Can't connect to device !! ---
[20:04:36] FATAL: Error connecting to the device. Please check your COM port settings. Error code: 1
[20:04:36] INFO: > Executing Operation: Disconnect
[20:04:36] ERROR: Error disconnecting from the device. Error code: 0
[20:04:36] Operation ServicePackProgramming returned. 
[20:04:48] Begin Format operation.
[20:04:49] INFO: > Executing Operation: Connect
[20:04:51] INFO: setting break signal
[20:04:51] INFO: --- please restart the device ---
[20:05:14] ERROR: ---reading ACK signal failed---
[20:05:14] WARNING: ---seting break signal to false failed---
[20:05:16] INFO: setting break signal
[20:05:16] INFO: --- please restart the device ---
[20:05:27] ERROR: ---reading ACK signal failed---
[20:05:28] WARNING: ---seting break signal to false failed---
[20:05:30] INFO: setting break signal
[20:05:30] INFO: --- please restart the device ---
[20:05:43] ERROR: ---reading ACK signal failed---
[20:05:43] WARNING: ---seting break signal to false failed---
[20:05:45] INFO: setting break signal
[20:05:45] INFO: --- please restart the device ---
[20:05:55] ERROR: ---reading ACK signal failed---
[20:05:55] WARNING: ---seting break signal to false failed---
[20:05:55] FATAL: --- Can't connect to device !! ---
[20:06:02] FATAL: Error connecting to the device. Please check your COM port settings. Error code: -3
[20:06:02] INFO: > Executing Operation: Disconnect
[20:06:02] Operation Format returned.

自己做的板子，完全按照Ti的推荐电路来设计的，我测过

 VDD_ANA1 1.9V

 VDD_DIG1 1.2V

 VDD_ANA2  3.3V完全正常，按下复位按键，测试，复位引脚被拉低，uniflash检测不到，新下载了个版本的uniflash

[11:55:06] Begin Format operation.
[11:55:07] INFO: > Executing Operation: Connect
[11:55:09] INFO: setting break signal
[11:55:10] INFO: detecting FTDI for device reset
[11:55:10] INFO: > Executing Operation: Disconnect
[11:55:10] Operation Format returned.

然后就搞不清情况了。请问下这是什么情况？请大家给我些帮助，谢谢

1. 下载的串口是用的55，57吗？

2.对比附件，告知你的原理图和下面有什么不同。

1108.cc3200.pdf

1.SOP有没有设置？，SOP2需要上拉；

2.串口助手驱动有没有正常安装？

谢谢回复，下载的串口是55：TXD，57RXD，原理图flash和串口别的都一样，就串口没有接上拉电阻，请问是这个问题么？我现在去接线试一下

谢谢回复，spo已设置，sop2已上拉，串口驱动正常安装，没有任何错误提示