求救！MC56F8037EVM程序不能正常下载 程序, 求救, 下载

xufuji159

本人使用的是MC56F8037EVM！前两天，程序突然不能正常下载到板子上的芯片上去了！CodeWarrior (8.2.3SE)老是提示CCSProtocolPlugin：Unknown protocol error。然后这个问题就一直存在！！！

下载器USB TAP我用8013的开发板试过了没有问题。另外，我用万用表检查了一下板子的电源和JTAG口，都没问题！上电时，8037芯片的VCC端都是正常的3.3V。

我现在发现的一个问题就是：板子在上电时，按板子上的复位键，板上的指示灯都没反应。正常的话，板子上的指示灯在复位键按下后会先灭掉再回复成原状！而我用万用表测试了一下8037芯片的复位管脚，在复位键按下时有明显的高低电平变化。

其他的也没检查出什么错误来了.....

现在有点怀疑的就是这块板上的芯片是不是坏掉了？

哪位高手可以指点一下，不胜感激！！！

xufuji159

根据飞思卡尔技术人员提供的资料顺利解决问题。

Question. I am using 56F8037EVM. After my code is downloaded to the board and run it with CodeWarrior,CodeWarrior can not communicate with my board any more.

Answer. This issue is mostly resulted from the application code configuring /RESET pin as GPIO pin on 56F80xx. To solve this issue, please use the attached FlashJtagLoader for 56F80XX Utility. It can automatically recover the /RESET pin with minimum manual work. Please follow the steps below:
1) Open a DOS command window and change the current directory to the one where the flashjtagloader tool reside;
2) Press and hold the /RESET button on the board;
3) Appy the power to the board;
4) Enter the following DOS command:
Flashjtagloader flash803x.cfg ledtoggle.s
5) When "Press any key after you release the /RESET button on the board..." message appears on the screen, release /RESET button;
6) Press Enter key;

Here is FlashJtagLoader for 56F80xx which can recover /RESET pin:
FlashJtagLoader for 56F80xx