关于AVR Studio 4仿真问题，请大家帮忙下。。。

只看该作者 · 2008-6-5 13:25

最近在玩AVR的片子，发现了一个问题：
我有两块实验板，相同的程序，其中一块正常，另外一块可以下载程序，可以执行单步，但是一运行就程序跑飞，而且经常在仿真的过程中，不在受仿真软件的控制，板子自己就开始运行程序了，不知道大家有没有发生过类似的情况，高手指点下：

以下为软件提示的错误：

Loaded objectfile: 闯红灯抓拍.cof

JTAG ICE Warning: Reading the program counter, an invalid value (0x7FFFFFFF) was received from the device.

JTAG ICE Warning: A problem occured while executing this debug command! Please check the connections, the voltage, and the clock system of the target application!

Error reading memory IO Address:0 Size:64

Error reading memory REGISTERS Address:0 Size:32

只看该作者 · 2008-6-5 13:31

JTAG口的设计，在PCB方面有什么样的要求？
比如说：线宽？和芯片的距离？上拉电阻的大小？

只看该作者 · 2008-6-6 09:01

问题已经找到，已经找到问题了，是供电电流不组的问题。。。

1万 · 2011-5-9 14:28

JTAG ICE: WARNING: Current setting for reprogramming device at object file load is 'Reprogram only if time of build of object file has changed'.
JTAG ICE: WARNING: The time of build of the object file has not changed. Device will not be reprogrammed.
Loaded objectfile: E:\default\DEMO.elf
JTAG ICE: Warning: Reading the program counter, an invalid value (0xFFFE) was received Error reading programcounter
Error reading memory : IO Address:0 Size:64
Error reading memory : REGISTERS Address:0 Size:32
JTAG ICE: A problem occured while restoring fuse and lockbits of device at end of debug session.
Loaded objectfile: E:\default\DEMO.elf
JTAG ICE: WARNING: Current setting for reprogramming device at object file load is 'Reprogram only if time of build of object file has changed'.
JTAG ICE: WARNING: The time of build of the object file has not changed. Device will not be reprogrammed.