STM32烧写程序时的问题

tangkunjyy

选择JTAG 2MHZ烧写时直接出问题，MDK提示如下，并弹出两个对话框如下；而若选择SW 10MHZ烧写时则一切顺利，这是什么原因？？？注意到板子上reset引脚直接上拉了没有电容按键之类的，是这个的影响吗？

JLink info:

------------

DLL: V4.15n, compiled Jun 18 2010 19:55:09

Firmware: J-Link ARM V8 compiled Nov 14 2012 22:34:52

Hardware: V8.00

S/N : 20100213 

Feature(s) : RDI,FlashDL,FlashBP,JFlash,GDBFULL 

* JLink Info: Could not measure total IR len. TDO is constant high.

**JLink Warning: No matching core found.

* JLink Info: Could not measure total IR len. TDO is constant high.

* JLink Info: Could not measure total IR len. TDO is constant high.

* JLink Info: Resetting target using RESET pin

* JLink Info: Halting CPU core

**JLink Warning: Received 0 as core Id.

***JLink Error: Could not find supported CPU core on JTAG chain

Bad JTAG communication: Write to IR: Expected 0x1, got 0x7 (TAP Command : 2) @ Off 0x5.

745021926

SWD烧写只要两根线，看看是不是剩余几根线的问题。。。就用SWD下载吧，占用IO口少，稳定