MSP430F5659: Software reset instruction needed

hello nitesh
try WDTCTL = 0xDEAD;

What kind of reset do you want, BOR, POR, or PUC? These can be triggered with PMMSWBOR, PMMSWPOR, and a watchdog password violation.

To re-initialize the hardware as much as possible, do a BOR:

PMMCTL0 = PMMCTL0_L | PMMPW | PMMSWBOR;

Hi,

Thanks for quick reply.

I am looking POR, so that i can all low level hardware re-initialized. I am using in build USB of  MSP430F5659 controller. So want to re Init the USB also.

Please let me know why WDT start is not working?

My code for reset

USB_disconnect();

USB_disable();

SYSBSLC &= ~(SYSBSLPE);

// Ensure no application interrupts fire during BSL

__disable_interrupt();

WDT_A_start(WDT_A_BASE);

 

On execution i am seeing USB disconnected but system wont restart.

i will try your suggestion and let u know

Thanks again

Nitesh

HI,

I am able to reset the system without any problem, but i have a question
I am using USB device if i am doing soft reset, i am seeing i have disconnect the cable if i want to communicate with device again
on soft reset.
But in my main routine i am initializing the USB also, still i need to reconnect ?
Please help.
Nitesh

There might be something wrong in your code. Which you have not shown.

Hi,

I am calling USB disconnect before doing soft reset as mentioned in previous comment. What else is needed, 

i am suspect PC side shall we need to close before connect.

Since i am seeing my device is restarting without any problem, Only thing is i need to disconnect the cable and reconnect to PC to start.

Please guide me its urgent.

Thanks

Nitesh 

Just guessing, but it might be possible that the time between the disconnect and the re-connect is too short for the host to notice it.

Ok, But one more thing i observed in our system when i tried the firmware upgrade i.e. pushing my PC to BSL address (0x1000).
When i call jump to 0x1000(BSL) , i am getting the system reset , because i am using external watchdog in my system. To resolve that we have added the disable handling for external WDT for this reason. So now if i don't disable the External WDT, i am getting reset and able to connect to USB without any issue after reset.

For system reset handling what we doing, i also suspect host is not able to identify the device connect and disconnect as you told .

So can i do the same jump to 0x1000 without WDT disable ? is this good way to handle?

Please share your thought, Waiting for your reply.

Thanks in advance,

Nitesh