u-boot-2009.08在mini2440上的移植 - linux编程基础

]

#endif
//此段代码使u-boot启动后，开发板上的LED1被点亮，而LED2、LED3、LED4不亮

ldr pc, _start_armboot

_start_armboot: .word start_armboot
#define STACK_BASE 0x33f00000
#define STACK_SIZE 0x10000
.align 2
DW_STACK_START: .word STACK_BASE+STACK_SIZE-4

(2)在完成board_init函数初始化时的点亮第二个LED，修改如下：

打开board/samsung/mini2440/mini2440.c，定位到100行附近，修改如下：

/* set up the I/O ports */
gpio->GPACON = 0x007FFFFF;
#if defined(CONFIG_MINI2440)
gpio->GPBCON = 0x00295551;
#else
gpio->GPBCON = 0x00044556;
#endif
gpio->GPBUP = 0x000007FF;
gpio->GPCCON = 0xAAAAAAAA;
gpio->GPCUP = 0xFFFFFFFF;
gpio->GPDCON = 0xAAAAAAAA;
gpio->GPDUP = 0xFFFFFFFF;
gpio->GPECON = 0xAAAAAAAA;
gpio->GPEUP = 0x0000FFFF;
gpio->GPFCON = 0x000055AA;
gpio->GPFUP = 0x000000FF;
gpio->GPGCON = 0xFF95FFBA;
gpio->GPGUP = 0x0000FFFF;
gpio->GPHCON = 0x0016FAAA;
gpio->GPHUP = 0x000007FF;

gpio->EXTINT0=0x22222222;
gpio->EXTINT1=0x22222222;
gpio->EXTINT2=0x22222222;

/* arch number of SMDK2410-Board */
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;

/* adress of boot parameters */
gd->bd->bi_boot_params = 0x30000100;

icache_enable();
dcache_enable();
#if defined(CONFIG_MINI2440_LED)
gpio->GPBDAT = 0x00000181;//GPB0=buzzer
#endif

int dram_init (void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;

return 0;
}

(3)在初始化console后点亮一个LED3，进入命令行之前点亮LED4

打开/lib_arm/board.c，定位到52行，修改如下：

#include
#include
#include
#include //modify

#ifdef CONFIG_DRIVER_SMC91111

定位到121行，注释掉下面代码：

#if 0
/************************************************************************
* Coloured LED functionality
************************************************************************
* May be supplied by boards if desired
*/
void inline __coloured_LED_init (void) {}
//void inline coloured_LED_init (void) __attribute__((weak, alias("__coloured_LED_init")));
void inline __red_LED_on (void) {}
//void inline red_LED_on (void) __attribute__((weak, alias("__red_LED_on")));
void inline __red_LED_off(void) {}
//void inline red_LED_off(void) __attribute__((weak, alias("__red_LED_off")));
void inline __green_LED_on(void) {}
//void inline green_LED_on(void) __attribute__((weak, alias("__green_LED_on")));
void inline __green_LED_off(void) {}
//void inline green_LED_off(void)__attribute__((weak, alias("__green_LED_off")));
void inline __yellow_LED_on(void) {}
//void inline yellow_LED_on(void)__attribute__((weak, alias("__yellow_LED_on")));
void inline __yellow_LED_off(void) {}
//void inline yellow_LED_off(void)__attribute__((weak, alias("__yellow_LED_off")));
void inline __blue_LED_on(void) {}
//void inline blue_LED_on(void)__attribute__((weak, alias("__blue_LED_on")));
void inline __blue_LED_off(void) {}
//void inline blue_LED_off(void)__attribute__((weak, alias("__blue_LED_off")));
#endif

定位到171行附近：修改如下：

static int display_banner (void)
{
#if defined(CONFIG_MINI2440_LED)
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
gpio->GPBDAT = 0x101; //
#endif
printf ("\n\n%s\n\n", version_string);
printf (" modified by singleboy (singleboy@163.com)\n"); //display on serial console
printf (" Love Linux forever!!\n\n");
debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
_armboot_start, _bss_start, _bss_end);
#ifdef CONFIG_MODEM_SUPPORT
debug ("Modem Support enabled\n");
#

u-boot-2009.08在mini2440上的移植(四)