From 00f97ad08d681505179002d722d7a5f8fb192f35 Mon Sep 17 00:00:00 2001 From: Kevin Townsend Date: Mon, 14 May 2012 22:22:36 +0200 Subject: [PATCH] First commit --- tools/validation/startupdelay/abstract.txt | 7 ------- tools/validation/startupdelay/readme.txt | 16 ++++++++++++++++ 2 files changed, 16 insertions(+), 7 deletions(-) delete mode 100644 tools/validation/startupdelay/abstract.txt create mode 100644 tools/validation/startupdelay/readme.txt diff --git a/tools/validation/startupdelay/abstract.txt b/tools/validation/startupdelay/abstract.txt deleted file mode 100644 index 10ebc2a..0000000 --- a/tools/validation/startupdelay/abstract.txt +++ /dev/null @@ -1,7 +0,0 @@ -This simple code can be used to test the startup delay, or more precisely -the delay between the moment that reset is deasserted and code execution -begins in main(). - -GPIO pin 2.1 is set to output and high as soon as main is entered, so you -simply need to monitor the reset line and GPIO 2.1 on a two-channel -oscilliloscope, and measure the delay between the two rising edges. \ No newline at end of file diff --git a/tools/validation/startupdelay/readme.txt b/tools/validation/startupdelay/readme.txt new file mode 100644 index 0000000..923cd79 --- /dev/null +++ b/tools/validation/startupdelay/readme.txt @@ -0,0 +1,16 @@ +This simple code can be used to test the startup delay, or more precisely +the delay between the moment that reset is deasserted and code execution +begins in main(). + +GPIO pin 2.1 is set to output and high as soon as main is entered, so you +simply need to monitor the reset line and GPIO 2.1 on a two-channel +oscilliloscope, and measure the delay between the two rising edges. + +Two sample tests results are showing for GCC with a Makefile and with +Crossworks for ARM. Both examples are included since the startup code +for both project types is slightly different, with Crossworks using a +custom startup file provided by Rowley Associates, and the LPC1343 +Code Base using it's own startup code when compiling with make and GCC. + +Note: This code is only useful for measuring the time coming out of +reset, not from a cold boot (applying power to an unpowered device). \ No newline at end of file -- 2.20.1