Appendix B Ledblinker.c - Motorola Digital dna MSC8101ADS Manual

Running LEDblinker from Internal SRAM

Appendix B LEDblinker.c

10
Freescale Semiconductor, Inc.
/*
file name: LedblinkerOutOfFlash.c
v0.1 drs 15May01 original
v0.2 dm 07June01 clean up
v0.3 drs 30Jan02 clean up
v0.4 drs 01Apr02 Add comments for Sinit()
Description: Flash green and red LED on MSC8101ADS board
(green on, green off, red on, red off, then repeat all)
Notes:
1. Change loop time in FlashLed if running out of internal
SRAM/Flash.
2. Take out Sinit() if running code from internal SRAM (ie. using
debugger)
*/
#include "msc8101.h" // memory map registers and locations
#define OFF 0
#define RED 1
#define GREEN 2
#define GP_LED0_PIL 0x02000000
#define GP_LED1_PIL 0x01000000
// function prototypes
void Led( UWord16 );
void FlashLed( UWord16 );
void init( void );
// global variables
UWord32 *BCSR0; // Board Control and Status Register Address Values.
Register bit
UWord32 *BCSR1;
UWord32 *BCSR2;
t_8101IMM *IMM; /* IMM base pointer */
void main(void)
{
Sinit();
init(); // initialize variables, pointers, LEDs, ...
while ( 1 ) {
FlashLed( GREEN );
FlashLed( RED );
}
}
/*------------------------------------------------------------------------
--
*
* FUNCTION NAME: init
* DESCRIPTION: 8101 and 8101ADS initialization
*
*/
void init( void ) {
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// TAKE OUT IF RUNNING FROM INTERNAL SRAM
// Initialize IMMR and disable watchdog