• State Not Answered
  • Locked Locked
  • Replies 0 replies
  • Subscribers 21 subscribers
  • Views 1042 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

How to do hardware reset automatically before flash download?

Leo Cheng

Hello Everyone,

I came across keil flash download failure issue because of the watchdog. The watchdog will reset the chip during the process of flash download. And the watchdog can be disabled by hardware reset.

There are two ways to program flash, one is click "download" button(Shortcut Key = F8), the other is click start/stop debug session button(Shortcut Key = Ctrl + F5). There is a "pre-reset" option in debug setting, it works well. Also I found the pre-download script function in Keil IDE. The following is the script I tried. There is a gpio pin used to do hardware reset.

FUNC void Setup (void) {
  // Hardware reset the chip to disable the watchdog
  _WDWORD(0x400866AC, 0x14);   // Port D pin 11, GPIO, floating
  _WDWORD(0x400F6018, 1<<25);  // GPIO port6, pin25, output
  _WDWORD(0x400F6218, 1<<25);  // GPIO port6, pin25, output high level
  //_sleep_(4000);
}

Setup();                             // Setup for Flash

Unfortunately, It failed. It seems that Keil IDE does not support this scenario.

Does anyone have any idea?

Thank you!
Leo

0