USB

【NK-980IOT测评】感觉板子的HOST USB0坏了

发布于 2022-03-17 13:14:59 浏览：1531 订阅该版

FLBF_5496 2022-03-24

这家伙很懒，什么也没写！

Juggernaut 2022-03-25

①②③

Juggernaut 2022-03-25

①②③

looks like I find the root cause...
Here is my test steps:

0. 5V DC in, two USB cables link to my laptop, and open then sound of PC(to notify when OS detect the new hardware);
1. one by one checking 3 VDDs, there is no OS sound when checking the voltage of VDD12 and VDD18, and when I checking the voltage of VDD33 CT4, my laptop plays the beautify music😋...
2. double click the nuwriter, it works.
![1.png](https://oss-club.rt-thread.org/uploads/20220325/d2200b2ebaf6c76a821ff291e411b02b.png)
dowload rtthread to DDR RAM and run.
![2.png](https://oss-club.rt-thread.org/uploads/20220325/e1c27235b9e124c8e19dd54ddf02b48c.png)
when i reset system, there is SPI error log as following:

```
msh />reset
Restarting system...
m
NUC980 IBR 20180813
Boot from USB
DDR-OK
=======================================
Run firmware code
CPU: 300MHz, DDR: 300MHz, SYS: 300MHz, PCLK: 150MHz
Parse NuWriter command line
=======================================
SPI NOR ID=0x0000ffff  _spi_type =0
SPI NOR ID=0x0000ffff  _spi_type =0
Error! Read SPI ID(0xffff)

SPI NAND: Auto Detect
ID=[0xefaa21]
BlockPerFlash = 1024, PagePerBlock = 64
PageSize = 2048, SpareArea = 64
QuadReadCmd    = 0x6b
ReadStatusCmd  = 0xff
WriteStatusCmd = 0xff
StatusValue    = 0xff
Dummybyte      = 0x1
Multi-Die      = 0

NAND ID=[0][0][0][0]
PowerOn setting 0x5f6001d4
BlockPerFlash=-2, PagePerBlock=64, PageSize=2048

eMMC1/SD1 Init Fail

Finish get INFO!!

```
when i reboot the system(OFF and ON the power), it must to check the voltage of VDD33 CT4 firstly, and then system works, otherwise it repeart the following error:
```

NUC980 IBR 201
NUC980 IBR 20180813
Boot from
NUC980 IBR 20180813
NUC980 IBR 20180813
Boot fr
NUC980 IBR 201808
NUC980 IBR 201808
NUC980 IBR 2018081

```

so, How to fix this hardware issue? thx