自己项目做的rt1061的demo板子 Serial Downloader usb无法识别

[Yoho]

demo板子 使用官方SDK 无论是usb的一些示例或者flashloader工程 都能正常通信

但是直接进入bootrom 或者使用ROMAPI

uint32_t arg = 0xeb110000; 
ROM_RunBootloader(&arg);

都无法建立usb通信 电脑显示这个usb口 描述符获取失败

使用官方开发板都可以成功

请问往哪个方向寻找问题

[lucas_cao]

Please check the following bits value after system boot.. It should be 00 or 01, then system can enter SDP mode. Otherwise, it cannot go to SDP. 

[Yoho]

Cache: Separate I- and D-cache.
I-Cache L1: 32 KB, 512 Sets, 32 Bytes/Line, 2-Way
D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
Cortex-M7 identified.
J-Link>h
PC = 0021AADC, CycleCnt = D616FD97
R0 = 20200F30, R1 = 00000001, R2 = 00000001, R3 = 2020533C
R4 = 20200F30, R5 = 20200F58, R6 = 202051ED, R7 = EB50A453
R8 = 00000002, R9 = 00000000, R10= 00000000, R11= 400F8000
R12= 00000004
SP(R13)= 20200F28, MSP= 20200F28, PSP= 00000000, R14(LR) = 00218391
XPSR = 81000000: APSR = Nzcvq, EPSR = 01000000, IPSR = 000 (NoException)
CFBP = 00000000, CONTROL = 00, FAULTMASK = 00, BASEPRI = 00, PRIMASK = 00

FPS0 = 00000000, FPS1 = 00000000, FPS2 = 00000000, FPS3 = 00000000
FPS4 = 00000000, FPS5 = 00000000, FPS6 = 00000000, FPS7 = 00000000
FPS8 = 00000000, FPS9 = 00000000, FPS10= 00000000, FPS11= 00000000
FPS12= 00000000, FPS13= 00000000, FPS14= 00000000, FPS15= FFFFFFFF
FPS16= 00000000, FPS17= 00000000, FPS18= 00000000, FPS19= 00000000
FPS20= 00000000, FPS21= 00000000, FPS22= 00000000, FPS23= 00000000
FPS24= 00000000, FPS25= 00000000, FPS26= 00000000, FPS27= 00000000
FPS28= 00000000, FPS29= 00000000, FPS30= 00000000, FPS31= FFFFFFFF
FPSCR= 00000000
J-Link>mem32 0x400f801c
Syntax: mem32 <Addr>, <NumItems>
J-Link>mem32 0x400f801c,1
400F801C = 00000009
J-Link>


这个是我上电并且插上USB 等待PC出现USB描述符获取失败后
用JLINK读出的状态
PC显示正运行在BOOTROM中,SRC_SBMR2也是处于正常状态

[jingpan]

Hi @Yoho ,

是不是说电脑USB检测到插入但是枚举失败？从serial download mode上电启动可以吗，多试几次稳定吗？还有就是你写过那些fuse？

Regards，

Jing

[Hui_Ma]

Hi,

Chapter 9.13.3 ROM API runBootloader() description with below typical use cases:

1. Enter Serial downloader mode and select USB as the communication peripheral.
uint32_t arg = 0xeb100000;
runBootloader (&arg);

Could you try with arg value with 0xeb100000? Set serial downloader media to Auto detection.

Wish it hleps.

Mike

[Yoho]

0xeb100000 我试过得不到想要的结果之后 才用的0xeb110000