Lpc2000

P0.14 must be held low when RESET is pulled low then high for the bootloader
to come alive and recognize your '?'.
  -----Original Message-----
  From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On Behalf Of
jstamos111@...
  Sent: Thursday, April 20, 2006 3:10 PM
  To: lpc2000@yahoogroups.com
  Subject: [lpc2000] ISP Problems


  Hey All,

  I\'m having trouble getting the ISP to work with the Philips Flash Utility
for a board I made that uses the LPC2106 processor.  I\'ve also tried using
hyperterminal and sending \'?\', but get no response.

  I\'ve connected the UART0 send and recv to an inverter and then to a
max233.  Anyone know if this is right?  Originally I did not have the
inverter, but I noticed that the max233 inverts its outputs.

  I\'m also wondering if perhaps I\'m not holding the proper buttons down.
I have two buttons that when pressed pull their respective pins low on the
LPC processor.  The buttons are on the ~RST and P0.14 pins.  When I go to
use the flash utility or a terminal I know I hit the reset button, do I also
need to hit the P0.14 button.  Do I hold these down when I go to read the
device ID or when I start sending the question marks?

  I am pretty sure I\'ve got the settings right on the Philips utility.  My
processor\'s clock is 10Mhz and I set that.  I set the baud rate to 9600 as
well.  When I use HyperTerminal I set the bits per second to 9600, the
databits to 8, parity to none, stop bits to 1, and flow control to none.

  Any idea why I might be having this problem?  Anything else you need to
know?

  Thanks.
  - John


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