研究 tekkamanninja-u-boot-2010.03-tekkaman 遇到的问题

来源：互联网发布：ad hoc网络协议编辑：程序博客网时间：2024/05/16 23:48

发现问题：

在Board.c文件中：start_armboot()函数中：

#if defined(CONFIG_MINI2440_LED)
writel(0x0, &gpio->GPBDAT); //tekkamanninja
#endif

这段代码是关闭蜂鸣器，那是在哪里打开蜂鸣器的呢？

今天就到这里了，明天再继续…

解决问题：

不知道是不是下面的这段代码打开的蜂鸣器？今晚回家试一下。

/Board/Tekkamanninja/Mini2440/Mini244.c

int board_init (void)
{
struct s3c24x0_clock_power * const clk_power =
s3c24x0_get_base_clock_power();
struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();

/* to reduce PLL lock time, adjust the LOCKTIME register */
clk_power->LOCKTIME = 0xFFFFFF;

/* configure MPLL */
clk_power->MPLLCON = ((M_MDIV << 12) + (M_PDIV << 4) + M_SDIV);

/* some delay between MPLL and UPLL */
delay (4000);

/* configure UPLL */
clk_power->UPLLCON = ((U_M_MDIV << 12) + (U_M_PDIV << 4) + U_M_SDIV);

/* some delay between MPLL and UPLL */
delay (8000);

/* set up the I/O ports */
gpio->GPACON = 0x007FFFFF;

#if defined(CONFIG_MINI2440)
gpio->GPBCON = 0x00295551;
#else
gpio->GPBCON = 0x00044556;
#endif

gpio->GPBUP = 0x000007FF;

#if defined(CONFIG_MINI2440)
gpio->GPCCON = 0xAAAAA6AA;
gpio->GPCDAT &= ~(1<<5);
#else
gpio->GPCCON = 0xAAAAAAAA;
#endif
gpio->GPCUP = 0xFFFFFFFF;
gpio->GPDCON = 0xAAAAAAAA;
gpio->GPDUP = 0xFFFFFFFF;

gpio->GPECON = 0xAAAAAAAA;
gpio->GPEUP = 0x0000FFFF;
gpio->GPFCON = 0x000055AA;
gpio->GPFUP = 0x000000FF;
gpio->GPGCON = 0xFF95FF3A;
gpio->GPGUP = 0x0000FFFF;
gpio->GPHCON = 0x0016FAAA;
gpio->GPHUP = 0x000007FF;

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

#if defined(CONFIG_S3C2410)
/* arch number of SMDK2410-Board */
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
#endif

#if defined(CONFIG_S3C2440)
/* arch number of S3C2440-Board */
gd->bd->bi_arch_number = MACH_TYPE_MINI2440 ;
#endif

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

icache_enable();
dcache_enable();
#if defined(CONFIG_MINI2440_LED)
gpio->GPBDAT = 0x00000181;
#endif
return 0;
}

原来真的是这里啊！已经通过Mini2440开发板验证。