eminkiran
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Jump to bootloader from main application
Hello,
I am using Pic32mx795f512L.
I install bootloader code on PIC32 ESK dm320004 development tool.
"harmony \ v2_05_01 \ apps \ bootloader \ basic \ firmware \ basic.X"
I ran the application The bootloader is running. I uploaded user application There is no problem
Mplab X ide = v4.15
Compiler = xc32 v2.05
Harmony = v2_05_01
Bootloader Firmware Version: 1.4
So, how can i jump to bootloader from main application without any trigger(like button)
I would like to use software trigger over the main application. If is it possible, how ?
Thanks for answer
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NKurzman
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Re: Jump to bootloader from main application
2018/10/09 14:49:47
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You could Jump. But a Software Reset, or a Watch dog would be easier.
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eminkiran
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Re: Jump to bootloader from main application
2018/10/10 00:35:48
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Hi NKruzman how can i sens jump signal on bootloader side.
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raja28chowdhury
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Re: Jump to bootloader from main application
2018/10/10 01:05:34
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☼ Best Answerby eminkiran 2018/10/10 01:16:59
generally you wait for some time in bootloader and wait for a specific packet from usart if you don't get it go to main application
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eminkiran
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Re: Jump to bootloader from main application
2018/10/10 01:20:46
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hi raja i using microchip ethernet bootloader. I need to redirect the code after the trigger code from the main program.
Like this
void (*fptr)(void);
fptr = (void (*)(void))(0xBFC00000);
fptr();
but i dont know (after trigger) code address
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raja28chowdhury
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Re: Jump to bootloader from main application
2018/10/10 01:28:36
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have you conformed the address of main in map file
looks like this
C:\Users\raja2\Google Drive\microchip code\door_alarm.X\dist\default\production
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raja28chowdhury
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Re: Jump to bootloader from main application
2018/10/10 01:32:08
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this is from microchip app note for pic 18 and i have put it in application with no remapping
void interrupt high_isr()
{
if(PIR1bits.RCIF)
{
if(RCSTAbits.FERR && !PORTCbits.RC7)
{
// receiving BREAK state, soft reboot into Bootloader mode.
Reset();//reset the pic and go into bootloader
}
TXREG = RCREG; // echo received UART character back out
LATD ^= 0xF0;
}
}
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NKurzman
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Re: Jump to bootloader from main application
2018/10/10 05:48:51
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You can
1. Leave a message in “persistent memory
2. Put a message in external eeprom.
3. Use the software reset and is RCON to tell it is a software reset.
4. Think of something even more Clever
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NKurzman
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Re: Jump to bootloader from main application
2018/10/10 05:48:51
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You can
1. Leave a message in “persistent memory
2. Put a message in external eeprom.
3. Use the software reset and is RCON to tell it is a software reset.
4. Think of something even more Clever
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eminkiran
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Re: Jump to bootloader from main application
2018/10/10 05:50:57
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i tried EnableWDT(); or SYS_WDT_Enable() but i get undefined referance error message. Why ?
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friesen
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Re: Jump to bootloader from main application
2018/10/10 05:52:06
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☄ Helpfulby Geri 2020/05/29 11:33:06
My personal preference is to check RCON. That way if you do a software reset from your application, RCONbits.SWR will be set. Just be sure to clear RCON before jumping back to the main application, it doesn't self clear.
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eminkiran
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Re: Jump to bootloader from main application
2018/10/10 06:47:02
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i use SYS_RESET_SoftwareReset(); function. but not become 1 on SWR bit
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friesen
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Re: Jump to bootloader from main application
2018/10/10 07:22:14
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How exactly are you checking? You can't check with a debugger.
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eminkiran
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Re: Jump to bootloader from main application
2018/10/11 00:12:06
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Hi all,
Problem solved
Tanks for advice
I called in Main program
void reset_cpu(void) //Don't miss wdt prescaller 1:1 for booth application main program and bootloader
{
WDTCONbits.ON = 1; //Enable the WDT
}
Bootloader Read
if (RCONbits.WDTO)
{
RCONbits.WDTO=0;
return (1);
}
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