Lpc2000

I restored most of the registers I touched (uart, timers, pll, mam,
etc.) to their reset condition and it worked perfectly.

"Synchronized response"...I keep sending '?' and it keeps responding 
--- In lpc2000@...m, Sébastien MARION (UMM) <s.marion@u...>
wrote:
> Hi,
> 
>   I testing this code with an half success :
> 
>   My program is in external flash (I use the LPC2210) and for
writing in this flash I load by ISP command a Simple Program in RAM.
>   I Include in my main program (who is in flash) an RS command who
launch this code.
>   When I Load My simple Program in ram by manually enter in ISP mode
and then launch my main program ( my code is :
> static void GoMain(void) {
>   REG(SYSCON_MEMMAP) = 0x3;
>   Reset();
> }
> 
> static void Reset(void) {
>   void (*bootloader_entry)(void);
>   bootloader_entry = (void (*)(void))(0x0);
>   bootloader_entry();
> }
> )  I can send my RS command to launch ISP with success.
> 
> BUT when I start my main program normally (without passing by ISP
and ram code) and launch the same RS command who call the same
function It doesn't work !
> 
> I think ISP change a default value somewhere that I don't touch in
my main program, and who is not set in this code, but I don't find it.
> 
> If any body as an idea, I be very happy.
> 
> Sebastien
> 
> ps : sorry for my bad english.
> 
> 
>   ----- Original Message ----- 
>   From: Richard 
>   To: lpc2000@yahoogroups.com 
>   Sent: Friday, November 19, 2004 12:39 AM
>   Subject: [lpc2000] Re: Any way to launch ISP ?
> 
> 
> 
>   Here is some code that will invoke the bootloader which will read 
>   P0.14 (after you have set it low) and initiate ISP.
> 
>   Richard
> 
>   /* ISP Invocation code - Richard Soennichsen - Philips 
>   Semiconductors  */
>   /*                                                 
>         10/11/2004                                    
>                                             */
> 
>   /* define the SFR addresses, this may already be handled in a header 
>   file */
> 
>   #define MEMMAP   (*((volatile unsigned int *) 0xE01FC040))
>   #define IODIR0   (*((volatile unsigned int *) 0xE0028008))
>   #define IOCLR0   (*((volatile unsigned int *) 0xE002800C))
>   #define PINSEL0  (*((volatile unsigned int *) 0xE002C000))
>   #define VPBDIV   (*((volatile unsigned int *) 0xE01FC100))
>   #define PLLCON   (*((volatile unsigned int *) 0xE01FC080))
>   #define PLLFEED  (*((volatile unsigned int *) 0xE01FC08C))
> 
> 
>   void (*bootloader_entry)(void);  /* Declare the entry function  */
>   unsigned long temp;                              /*Temporary 
>   variable    */
> 
>   void init(void)
>     {
>   temp = PINSEL0;              /* Connect RxD0 & TxD0 pins to GPIO */
>   PINSEL0 = temp & 0xFFFFFFF3;
> 
>   /* Select P0.14 as an output and P0.1 as an input */
>   /* P0.1 is sampled to determine baud rate             */
>   temp = IODIR0; 
>   temp = temp | 0x4000;
>   temp = temp & 0xFFFFFFFD;
>   IODIR0 = temp;
> 
>   IOCLR0 = 0x4000;          /* Clear P0.14 */  
> 
>   /*
>      Disconnect PLL if you want to do ISP at crystal frequency.
>      Otherwise you need to pass the PLL freq when bootloader goes in
>      ISP mode. 
>      cclk = crystal when PLL is disconnected 
>      cclk = PLL freq when PLL is connected.
> 
>      Disconnecting the PLL is recommended. 
> 
>      *pllcon = 0x0;                        / disconnect the PLL
>         */
>      *pllfeed = 0xAA;
>      *pllfeed = 0x55;
>   */
> 
>   /*
>      Set the VPB divider to 1/4 if you application changes the VPBDIV 
>   value.
>      The bootloader is hard-coded to use the reset value of VPBDIV 
>   register
>      *vpbdiv = 0x0;
>   */
> 
>   /* Map bootloader vectors */
>      MEMMAP = 0x0;
> 
>   /* Point to bootloader entry point i.e. reset vector 0x0 */
> 
>      bootloader_entry = (void (*)(void))(0x0);
>   }
>   /*
>      Invoke the bootloader
>      The bootloader will read pin P0.14 to detect if ISP is forced
>      Since P0.14 is configured as an output and set to 0, the 
>   bootloader
>      will go in ISP mode.
>   */
>   int main(void)
>     {
>       init();
>         bootloader_entry();
>     }
> 
> 
> 
> 
> 
> 
> 
>   --- In lpc2000@yahoogroups.com, Owen Mooney <ojm@s...> wrote:
>   > Yup There shore is !
>   > 
>   > In the LPC2106 anyway. I dunno about the rest of them. But it 
>   requrires a reset of the micro!
>   > 
>   > Use the IAP instructions to erase the first block of flash memory.
>   > 
>   > Drop the supply and bring it up again, and the chip detects the 
>   lost of a valid program 
>   > and automatically jumps to the ISP.
>   > 
>   > I use this to update the firmware with P0.14 buried deep in a hunk 
>   of expoxy, but watch it,
>   > Once the ISP is running anyone can steal your program !! I use a 
>   very unlikely pass code in the operating firmware to do this.
>   > 
>   > Owen Mooney
>   > 
>   > Subject: 
>   > 
>   > 
>   > Is there any way to launch the ISP software without having the BSL
>   > jumper on?  (i.e. does it have an entry point that does not check 
>   P0.14?)
> 
> 
> 
> 
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