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Program development log
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Program - Blink LED
Description - Blink LED
Author - TL Fong
Version - 0.32
Date - 2013jul10hkt1123
License - No copyright, free for everybody
Hardware - Somy ARM Cortex M0 LPC1114 Learning Board
Software - Keil uVision 4.71.2.0 ARM compiler toolchain
Hardware configuration notes
1. LED1 is connected to PIO1-8
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*** 2013jul09 ************************************************************
1. This is the very first program I am writing for the LPC1114 learning
board.
2. LED1 is connection to PIO1-8
3. The program has built without errors, but I have no confidence it will
run the first time. There is a risk that this program might corrupt
the auto start self test LED display program stored in the flash. So I
dare not to download and run it. I guess I need to first make sure a
couple of things.
(a) If I upload this program, will the old program in flash got
replaced?
(b) Can I upload this program in a spare space in flash, so not to
overwrite the original program there?
4. I remember that when I played with Arduino, there is no such worry,
because there is no self test LED display message in Arduino.
5. Since I am new to this PLC1114 learning board, I think I better play
safe and read more about flash downloading etc before running this first
program.
Another think I should also do is to first run this program in simulation
mode, to check out if the PIO1-8 pin is indeed going high and low.
6. One more thing I need to find out the the time delay function. I wonder
if Keil C has any delay function like delayMilliseconds()
7. For Raspberry Pi Python I can easily google the Python to give answers
for the above questions. But for this Keil C, I have no idea where to
start. Perhaps I should try the uVision Help first.
8. Rebuild target 'Blinky' results
Program Size: Code=1376 RO-data=284 RW-data=4 ZI-data=612
"blinky.axf" - 0 Error(s), 0 Warning(s).
*** 2013jul10 ************************************************************
1. Removed the following lines.
void enableGpioClock()
{
LPC_SYSCON->SYSAHBCLKCTRL |= (1UL << 6);
LPC_SYSCON->SYSAHBCLKCTRL |= (1UL << 16);
}
2. Teething problems took me 2 hours to solve. Problem included the
following.
a. No end of line character in source and header file. I needed to
use EditPlus to add 1 extra blank line to get around.
b. Could not find system files like LPC11xx.h etc. To get around
I just blindly copy one while folder from the NXP example program.
but I still could not locate the .h files. I tried to use Windows
built in search and also third party file locators but still no
luck.
3. After another rebuidling, then I found why I could not locate the
header files. Actually they are automatically generated during the
build process. So problem solved.
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End of program development log
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