硬件平台：JZ2440
实现功能：通过采集触摸屏ADC的电压值，推算触摸xy坐标
start.s
init.c
nand.c
interrupt.c
uart.c
uart.h
my_stdio.c
my_stdio.h
screen_touch.c
screen_touch.h
s3c24xx.h
main.c
start.s
.extern main interrupt_init adc_interrupt
.text
.global _start
_start: b Reset HandleUndef:
b HandleUndef HandleSWI:
b HandleSWI HandlePrefetchAbort:
b HandlePrefetchAbort HandleDataAbort:
b HandleDataAbort HandleNotUsed:
b HandleNotUsed b HandleIRQ HandleFIQ:
b HandleFIQ Reset:
ldr sp,=
bl watchdog_init
bl clock_init
bl nand_init
bl sdram_init ldr r0,=0x30000000
mov r1,#
mov r2,#(*)
bl nand_read msr cpsr_c,#0xd2
ldr sp,=0x31000000 msr cpsr_c,#0xdf
ldr sp,=0x34000000 ldr lr,=interrupt_return
ldr pc,=interrupt_init
interrupt_return:
msr cpsr_c,#0x5f ldr lr,=main_return
ldr pc,=main
main_return:
b main_return HandleIRQ:
sub lr,lr,#
stmdb sp!,{r0-r12,lr} ldr lr,=adc_return
ldr pc,=adc_interrupt
adc_return:
ldmia sp!,{r0-r12,pc}^
init.c
//watchdog
#define WTCON (*(volatile unsigned long *)0x53000000) //clock
#define LOCKTIME (*(volatile unsigned long *)0x4c000000)
#define MPLLCON (*(volatile unsigned long *)0x4c000004)
#define CLKDIVN (*(volatile unsigned long *)0x4c000014) //sdram
#define BWSCON (*(volatile unsigned long *)0x48000000)
#define BANKCON0 (*(volatile unsigned long *)0x48000004)
#define BANKCON1 (*(volatile unsigned long *)0x48000008)
#define BANKCON2 (*(volatile unsigned long *)0x4800000c)
#define BANKCON3 (*(volatile unsigned long *)0x48000010)
#define BANKCON4 (*(volatile unsigned long *)0x48000014)
#define BANKCON5 (*(volatile unsigned long *)0x48000018)
#define BANKCON6 (*(volatile unsigned long *)0x4800001c)
#define BANKCON7 (*(volatile unsigned long *)0x48000020)
#define REFRESH (*(volatile unsigned long *)0x48000024)
#define BANKSIZE (*(volatile unsigned long *)0x48000028)
#define MRSRB6 (*(volatile unsigned long *)0x4800002c)
#define MRSRB7 (*(volatile unsigned long *)0x48000030) void watchdog_init(void)
{
WTCON=;
} void clock_init(void)
{
CLKDIVN=0x03;
__asm__
(
"mrc p15,0,r1,c1,c0,0\n"
"orr r1,r1,#0xc0000000\n"
"mcr p15,0,r1,c1,c0,0\n"
);
MPLLCON=((0x5c<<)|(0x01<<)|(0x02));
} void sdram_init(void)
{
volatile unsigned long *sdram_base=(volatile unsigned long *)0x48000000;
sdram_base[] = 0x22011110;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00000700;
sdram_base[] = 0x00018005;
sdram_base[] = 0x00018005;
sdram_base[] = 0x008C04F4;
sdram_base[] = 0x000000B1;
sdram_base[] = 0x00000030;
sdram_base[] = 0x00000030; }
nand.c
#define LARGER_NAND_PAGE #define GSTATUS1 (*(volatile unsigned int *)0x560000B0)
#define BUSY 1 #define NAND_SECTOR_SIZE 512
#define NAND_BLOCK_MASK (NAND_SECTOR_SIZE - 1) #define NAND_SECTOR_SIZE_LP 2048
#define NAND_BLOCK_MASK_LP (NAND_SECTOR_SIZE_LP - 1) typedef unsigned int S3C24X0_REG32; /* NAND FLASH (see S3C2410 manual chapter 6) */
typedef struct {
S3C24X0_REG32 NFCONF;
S3C24X0_REG32 NFCMD;
S3C24X0_REG32 NFADDR;
S3C24X0_REG32 NFDATA;
S3C24X0_REG32 NFSTAT;
S3C24X0_REG32 NFECC;
} S3C2410_NAND; /* NAND FLASH (see S3C2440 manual chapter 6, www.100ask.net) */
typedef struct {
S3C24X0_REG32 NFCONF;
S3C24X0_REG32 NFCONT;
S3C24X0_REG32 NFCMD;
S3C24X0_REG32 NFADDR;
S3C24X0_REG32 NFDATA;
S3C24X0_REG32 NFMECCD0;
S3C24X0_REG32 NFMECCD1;
S3C24X0_REG32 NFSECCD;
S3C24X0_REG32 NFSTAT;
S3C24X0_REG32 NFESTAT0;
S3C24X0_REG32 NFESTAT1;
S3C24X0_REG32 NFMECC0;
S3C24X0_REG32 NFMECC1;
S3C24X0_REG32 NFSECC;
S3C24X0_REG32 NFSBLK;
S3C24X0_REG32 NFEBLK;
} S3C2440_NAND; typedef struct {
void (*nand_reset)(void);
void (*wait_idle)(void);
void (*nand_select_chip)(void);
void (*nand_deselect_chip)(void);
void (*write_cmd)(int cmd);
void (*write_addr)(unsigned int addr);
unsigned char (*read_data)(void);
}t_nand_chip; static S3C2410_NAND * s3c2410nand = (S3C2410_NAND *)0x4e000000;
static S3C2440_NAND * s3c2440nand = (S3C2440_NAND *)0x4e000000; static t_nand_chip nand_chip; /* 供外部调用的函数 */
void nand_init(void);
void nand_read(unsigned char *buf, unsigned long start_addr, int size); /* NAND Flash操作的总入口, 它们将调用S3C2410或S3C2440的相应函数 */
static void nand_reset(void);
static void wait_idle(void);
static void nand_select_chip(void);
static void nand_deselect_chip(void);
static void write_cmd(int cmd);
static void write_addr(unsigned int addr);
static unsigned char read_data(void); /* S3C2410的NAND Flash处理函数 */
static void s3c2410_nand_reset(void);
static void s3c2410_wait_idle(void);
static void s3c2410_nand_select_chip(void);
static void s3c2410_nand_deselect_chip(void);
static void s3c2410_write_cmd(int cmd);
static void s3c2410_write_addr(unsigned int addr);
static unsigned char s3c2410_read_data(); /* S3C2440的NAND Flash处理函数 */
static void s3c2440_nand_reset(void);
static void s3c2440_wait_idle(void);
static void s3c2440_nand_select_chip(void);
static void s3c2440_nand_deselect_chip(void);
static void s3c2440_write_cmd(int cmd);
static void s3c2440_write_addr(unsigned int addr);
static unsigned char s3c2440_read_data(void); /* S3C2410的NAND Flash操作函数 */ /* 复位 */
static void s3c2410_nand_reset(void)
{
s3c2410_nand_select_chip();
s3c2410_write_cmd(0xff); // 复位命令
s3c2410_wait_idle();
s3c2410_nand_deselect_chip();
} /* 等待NAND Flash就绪 */
static void s3c2410_wait_idle(void)
{
int i;
volatile unsigned char *p = (volatile unsigned char *)&s3c2410nand->NFSTAT;
while(!(*p & BUSY))
for(i=; i<; i++);
} /* 发出片选信号 */
static void s3c2410_nand_select_chip(void)
{
int i;
s3c2410nand->NFCONF &= ~(<<);
for(i=; i<; i++);
} /* 取消片选信号 */
static void s3c2410_nand_deselect_chip(void)
{
s3c2410nand->NFCONF |= (<<);
} /* 发出命令 */
static void s3c2410_write_cmd(int cmd)
{
volatile unsigned char *p = (volatile unsigned char *)&s3c2410nand->NFCMD;
*p = cmd;
} /* 发出地址 */
static void s3c2410_write_addr(unsigned int addr)
{
int i;
volatile unsigned char *p = (volatile unsigned char *)&s3c2410nand->NFADDR; *p = addr & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
} /* 读取数据 */
static unsigned char s3c2410_read_data(void)
{
volatile unsigned char *p = (volatile unsigned char *)&s3c2410nand->NFDATA;
return *p;
} /* S3C2440的NAND Flash操作函数 */ /* 复位 */
static void s3c2440_nand_reset(void)
{
s3c2440_nand_select_chip();
s3c2440_write_cmd(0xff); // 复位命令
s3c2440_wait_idle();
s3c2440_nand_deselect_chip();
} /* 等待NAND Flash就绪 */
static void s3c2440_wait_idle(void)
{
int i;
volatile unsigned char *p = (volatile unsigned char *)&s3c2440nand->NFSTAT;
while(!(*p & BUSY))
for(i=; i<; i++);
} /* 发出片选信号 */
static void s3c2440_nand_select_chip(void)
{
int i;
s3c2440nand->NFCONT &= ~(<<);
for(i=; i<; i++);
} /* 取消片选信号 */
static void s3c2440_nand_deselect_chip(void)
{
s3c2440nand->NFCONT |= (<<);
} /* 发出命令 */
static void s3c2440_write_cmd(int cmd)
{
volatile unsigned char *p = (volatile unsigned char *)&s3c2440nand->NFCMD;
*p = cmd;
} /* 发出地址 */
static void s3c2440_write_addr(unsigned int addr)
{
int i;
volatile unsigned char *p = (volatile unsigned char *)&s3c2440nand->NFADDR; *p = addr & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
*p = (addr >> ) & 0xff;
for(i=; i<; i++);
} static void s3c2440_write_addr_lp(unsigned int addr)
{
int i;
volatile unsigned char *p = (volatile unsigned char *)&s3c2440nand->NFADDR;
int col, page; col = addr & NAND_BLOCK_MASK_LP;
page = addr / NAND_SECTOR_SIZE_LP; *p = col & 0xff; /* Column Address A0~A7 */
for(i=; i<; i++);
*p = (col >> ) & 0x0f; /* Column Address A8~A11 */
for(i=; i<; i++);
*p = page & 0xff; /* Row Address A12~A19 */
for(i=; i<; i++);
*p = (page >> ) & 0xff; /* Row Address A20~A27 */
for(i=; i<; i++);
*p = (page >> ) & 0x03; /* Row Address A28~A29 */
for(i=; i<; i++);
} /* 读取数据 */
static unsigned char s3c2440_read_data(void)
{
volatile unsigned char *p = (volatile unsigned char *)&s3c2440nand->NFDATA;
return *p;
} /* 在第一次使用NAND Flash前，复位一下NAND Flash */
static void nand_reset(void)
{
nand_chip.nand_reset();
} static void wait_idle(void)
{
nand_chip.wait_idle();
} static void nand_select_chip(void)
{
int i;
nand_chip.nand_select_chip();
for(i=; i<; i++);
} static void nand_deselect_chip(void)
{
nand_chip.nand_deselect_chip();
} static void write_cmd(int cmd)
{
nand_chip.write_cmd(cmd);
}
static void write_addr(unsigned int addr)
{
nand_chip.write_addr(addr);
} static unsigned char read_data(void)
{
return nand_chip.read_data();
} /* 初始化NAND Flash */
void nand_init(void)
{
#define TACLS 0
#define TWRPH0 3
#define TWRPH1 0 /* 判断是S3C2410还是S3C2440 */
if ((GSTATUS1 == 0x32410000) || (GSTATUS1 == 0x32410002))
{
nand_chip.nand_reset = s3c2410_nand_reset;
nand_chip.wait_idle = s3c2410_wait_idle;
nand_chip.nand_select_chip = s3c2410_nand_select_chip;
nand_chip.nand_deselect_chip = s3c2410_nand_deselect_chip;
nand_chip.write_cmd = s3c2410_write_cmd;
nand_chip.write_addr = s3c2410_write_addr;
nand_chip.read_data = s3c2410_read_data; /* 使能NAND Flash控制器, 初始化ECC, 禁止片选, 设置时序 */
s3c2410nand->NFCONF = (<<)|(<<)|(<<)|(TACLS<<)|(TWRPH0<<)|(TWRPH1<<);
}
else
{
nand_chip.nand_reset = s3c2440_nand_reset;
nand_chip.wait_idle = s3c2440_wait_idle;
nand_chip.nand_select_chip = s3c2440_nand_select_chip;
nand_chip.nand_deselect_chip = s3c2440_nand_deselect_chip;
nand_chip.write_cmd = s3c2440_write_cmd;
#ifdef LARGER_NAND_PAGE
nand_chip.write_addr = s3c2440_write_addr_lp;
#else
nand_chip.write_addr = s3c2440_write_addr;
#endif
nand_chip.read_data = s3c2440_read_data; /* 设置时序 */
s3c2440nand->NFCONF = (TACLS<<)|(TWRPH0<<)|(TWRPH1<<);
/* 使能NAND Flash控制器, 初始化ECC, 禁止片选 */
s3c2440nand->NFCONT = (<<)|(<<)|(<<);
} /* 复位NAND Flash */
nand_reset();
} /* 读函数 */
void nand_read(unsigned char *buf, unsigned long start_addr, int size)
{
int i, j; #ifdef LARGER_NAND_PAGE
if ((start_addr & NAND_BLOCK_MASK_LP) || (size & NAND_BLOCK_MASK_LP)) {
return ; /* 地址或长度不对齐 */
}
#else
if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) {
return ; /* 地址或长度不对齐 */
}
#endif /* 选中芯片 */
nand_select_chip(); for(i=start_addr; i < (start_addr + size);) {
/* 发出READ0命令 */
write_cmd(); /* Write Address */
write_addr(i);
#ifdef LARGER_NAND_PAGE
write_cmd(0x30);
#endif
wait_idle(); #ifdef LARGER_NAND_PAGE
for(j=; j < NAND_SECTOR_SIZE_LP; j++, i++) {
#else
for(j=; j < NAND_SECTOR_SIZE; j++, i++) {
#endif
*buf = read_data();
buf++;
}
} /* 取消片选信号 */
nand_deselect_chip(); return ;
}
interrupt.c
#include"s3c24xx.h" void (*isr_handle_isr[])(void); void interrupt_init(void)
{
INTMOD=0x0;
INTMSK=0xffffffff;
} void adc_interrupt(void)
{
unsigned long offset=INTOFFSET; SRCPND=<<offset;
INTPND=INTPND;
isr_handle_isr[oft]();
}
uart.c
#include"uart.h" //uart
#define ULCON0 (*(volatile unsigned long *)0x50000000)
#define UCON0 (*(volatile unsigned long *)0x50000004)
#define UFCON0 (*(volatile unsigned long *)0x50000008)
#define UMCON0 (*(volatile unsigned long *)0x5000000c)
#define UTRSTAT0 (*(volatile unsigned long *)0x50000010)
#define UERSTAT0 (*(volatile unsigned long *)0x50000014)
#define UTXH0 (*(volatile unsigned char *)0x50000020)
#define URXH0 (*(volatile unsigned char *)0x50000024)
#define UBRDIV0 (*(volatile unsigned long *)0x50000028) //GPH
#define GPHCON (*(volatile unsigned long *)0x56000070)
#define GPHDAT (*(volatile unsigned long *)0x56000074)
#define GPHUP (*(volatile unsigned long *)0x56000078) void uart0_init(void)
{
GPHCON|=0xa0;
GPHUP=0x0c; ULCON0=0x03;
UCON0=0x05;
UFCON0=0x00;
UMCON0=0x00;
UBRDIV0=((/(*))-);
} unsigned char my_getchar(void)
{
while(!(UTRSTAT0 & 0x01));
return URXH0;
} void my_putchar(unsigned char date)
{
while(!(UTRSTAT0 & 0x02));
UTXH0=date;
} unsigned char getc(void)
{
while(!(UTRSTAT0 & 0x01));
return URXH0;
} void putc(unsigned char c)
{
while(!(UTRSTAT0 & 0x02));
UTXH0=c;
}
uart.h
#ifndef _UART_H_
#define _UART_H_ void uart0_init(void);
unsigned char my_getchar(void);
void my_putchar(unsigned char date); unsigned char getc(void);
void putc(unsigned char c); #endif
my_stdio.c
#include"uart.h"
#include"my_stdio.h" typedef char* va_list; #define int_sizeof(type) ((sizeof(int)+sizeof(type)-1)&~(sizeof(int)-1)) #define va_start(para_p,first_para) (para_p=(va_list)&first_para+int_sizeof(first_para))
#define va_arg(para_p,type) (*(type *)((para_p+=int_sizeof(type))-int_sizeof(type)))
#define va_end(para_p) (para_p=(va_list)0) void my_printf(const char *format, ...)
{
va_list temp ;
char *string = format;
va_start(temp, format); while (*string)
{
if (*string == '%')
{
switch (*++string)
{
case 'c': { my_putchar(va_arg(temp,char)); break; }
case 's':
{
char* p = va_arg(temp,char*);
while (*p != ) my_putchar(*p++);
break;
} case 'p':
{
unsigned int addr = (unsigned int)&va_arg(temp, unsigned int), sheft = 0xf0000000;
unsigned char temp = ,count=;
my_putchar('');
my_putchar('x');
while (count<)
{
temp = (unsigned char)(((sheft >> count)&addr) >> ( - count - )) ;
if (temp < ) my_putchar(temp + );
if (temp >= ) my_putchar(temp+-);
count += ;
}
break;
} case 'd':
{
int value = va_arg(temp, int),num=;
if (value == ) my_putchar();
if (value & 0x80000000) //负数
{
my_putchar('-');
num = -;
}
else //正数.;
while (!(value / num))
{
num /= ;
if (num == )
{
my_putchar();
return;
}
}
while (num != )
{
my_putchar(value / num+);
value %= num;
num /= ;
}
break;
} case 'f':
{
char *str = "Sorry: function is not available";
while (*str != ) my_putchar(*str++);
} default: break;
}
}
string++;
}
va_end(temp);
}
my_stdio.h
#ifndef _OWN_STDIO_H_
#define _OWN_STDIO_H_ void my_printf(const char *format,...); #endif
screen_touch.c
#include"s3c24xx.h"
#include"stdio.h" // ADCCON寄存器
#define PRESCALE_DIS (0 << 14)
#define PRESCALE_EN (1 << 14)
#define PRSCVL(x) ((x) << 6)
#define ADC_INPUT(x) ((x) << 3)
#define ADC_START (1 << 0)
#define ADC_ENDCVT (1 << 15) // ADCTSC寄存器
#define UD_SEN (1 << 8)
#define DOWN_INT (UD_SEN*0)
#define UP_INT (UD_SEN*1)
#define YM_SEN (1 << 7)
#define YM_HIZ (YM_SEN*0)
#define YM_GND (YM_SEN*1)
#define YP_SEN (1 << 6)
#define YP_EXTVLT (YP_SEN*0)
#define YP_AIN (YP_SEN*1)
#define XM_SEN (1 << 5)
#define XM_HIZ (XM_SEN*0)
#define XM_GND (XM_SEN*1)
#define XP_SEN (1 << 4)
#define XP_EXTVLT (XP_SEN*0)
#define XP_AIN (XP_SEN*1)
#define XP_PULL_UP (1 << 3)
#define XP_PULL_UP_EN (XP_PULL_UP*0)
#define XP_PULL_UP_DIS (XP_PULL_UP*1)
#define AUTO_PST (1 << 2)
#define CONVERT_MAN (AUTO_PST*0)
#define CONVERT_AUTO (AUTO_PST*1)
#define XP_PST(x) (x << 0) #define NOP_MODE 0
#define X_AXIS_MODE 1
#define Y_AXIS_MODE 2
#define WAIT_INT_MODE 3 #define wait_down_int() { ADCTSC = DOWN_INT | XP_PULL_UP_EN | \
XP_AIN | XM_HIZ | YP_AIN | YM_GND | \
XP_PST(WAIT_INT_MODE); } #define wait_up_int() { ADCTSC = UP_INT | XP_PULL_UP_EN | XP_AIN | XM_HIZ | \
YP_AIN | YM_GND | XP_PST(WAIT_INT_MODE); } #define mode_auto_xy() { ADCTSC = CONVERT_AUTO | XP_PULL_UP_DIS | XP_PST(NOP_MODE); } extern void (*isr_handle_array[])(void); static void screen_touch_interrupt(void)
{ printf("xdata = %4d, ydata = %4d\r\n", (int)(ADCDAT0 & 0x3ff), (int)(ADCDAT1 & 0x3ff));
wait_up_int();
SUBSRCPND |= BIT_SUB_ADC;
SRCPND |= BIT_ADC;
INTPND |= BIT_ADC;
} void screen_touch(void)
{
isr_handle_isr[ISR_ADC_OFT]=screen_touch_interrupt;
INTMSK &= ~BIT_ADC;
INTSUBMSK &= ~(BIT_SUB_TC);
INTSUBMSK &= ~(BIT_SUB_ADC);
ADCCON = PRESCALE_EN | PRSCVL();
ADCDLY = ;
wait_down_int();
INTSUBMSK |= BIT_SUB_TC;
INTSUBMSK |= BIT_SUB_ADC;
INTMSK |= BIT_ADC; }
screen_touch.h
#ifndef _SCREEN_TOUCH_H_
#define _SCREEN_TOUCH_H_ void screen_touch(void); #endif
s3c24xx.h
/* WOTCH DOG register */
#define WTCON (*(volatile unsigned long *)0x53000000)
#define WTDAT (*(volatile unsigned long *)0x53000004)
#define WTCNT (*(volatile unsigned long *)0x53000008) /* SDRAM regisers */
#define MEM_CTL_BASE 0x48000000
#define SDRAM_BASE 0x30000000 /* GPIO registers */
#define GPACON (*(volatile unsigned long *)0x56000000)
#define GPADAT (*(volatile unsigned long *)0x56000004) #define GPBCON (*(volatile unsigned long *)0x56000010)
#define GPBDAT (*(volatile unsigned long *)0x56000014)
#define GPBUP (*(volatile unsigned long *)0x56000018) #define GPCCON (*(volatile unsigned long *)0x56000020)
#define GPCDAT (*(volatile unsigned long *)0x56000024)
#define GPCUP (*(volatile unsigned long *)0x56000028) #define GPDCON (*(volatile unsigned long *)0x56000030)
#define GPDDAT (*(volatile unsigned long *)0x56000034)
#define GPDUP (*(volatile unsigned long *)0x56000038) #define GPECON (*(volatile unsigned long *)0x56000040)
#define GPEDAT (*(volatile unsigned long *)0x56000044)
#define GPEUP (*(volatile unsigned long *)0x56000048) #define GPFCON (*(volatile unsigned long *)0x56000050)
#define GPFDAT (*(volatile unsigned long *)0x56000054)
#define GPFUP (*(volatile unsigned long *)0x56000058) #define GPGCON (*(volatile unsigned long *)0x56000060)
#define GPGDAT (*(volatile unsigned long *)0x56000064)
#define GPGUP (*(volatile unsigned long *)0x56000068) #define GPHCON (*(volatile unsigned long *)0x56000070)
#define GPHDAT (*(volatile unsigned long *)0x56000074)
#define GPHUP (*(volatile unsigned long *)0x56000078) // ADC
#define ADCCON (*(volatile unsigned long *)0x58000000) //ADC control
#define ADCTSC (*(volatile unsigned long *)0x58000004) //ADC touch screen control
#define ADCDLY (*(volatile unsigned long *)0x58000008) //ADC start or Interval Delay
#define ADCDAT0 (*(volatile unsigned long *)0x5800000c) //ADC conversion data 0
#define ADCDAT1 (*(volatile unsigned long *)0x58000010) //ADC conversion data 1
#define ADCUPDN (*(volatile unsigned long *)0x58000014) //Stylus Up/Down interrupt status /*UART registers*/
#define ULCON0 (*(volatile unsigned long *)0x50000000)
#define UCON0 (*(volatile unsigned long *)0x50000004)
#define UFCON0 (*(volatile unsigned long *)0x50000008)
#define UMCON0 (*(volatile unsigned long *)0x5000000c)
#define UTRSTAT0 (*(volatile unsigned long *)0x50000010)
#define UTXH0 (*(volatile unsigned char *)0x50000020)
#define URXH0 (*(volatile unsigned char *)0x50000024)
#define UBRDIV0 (*(volatile unsigned long *)0x50000028) /*interrupt registes*/
#define SRCPND (*(volatile unsigned long *)0x4A000000)
#define INTMOD (*(volatile unsigned long *)0x4A000004)
#define INTMSK (*(volatile unsigned long *)0x4A000008)
#define PRIORITY (*(volatile unsigned long *)0x4A00000c)
#define INTPND (*(volatile unsigned long *)0x4A000010)
#define INTOFFSET (*(volatile unsigned long *)0x4A000014)
#define SUBSRCPND (*(volatile unsigned long *)0x4A000018)
#define INTSUBMSK (*(volatile unsigned long *)0x4A00001c) /*external interrupt registers*/
#define EINTMASK (*(volatile unsigned long *)0x560000a4)
#define EINTPEND (*(volatile unsigned long *)0x560000a8) /*clock registers*/
#define LOCKTIME (*(volatile unsigned long *)0x4c000000)
#define MPLLCON (*(volatile unsigned long *)0x4c000004)
#define UPLLCON (*(volatile unsigned long *)0x4c000008)
#define CLKCON (*(volatile unsigned long *)0x4c00000c)
#define CLKSLOW (*(volatile unsigned long *)0x4c000010)
#define CLKDIVN (*(volatile unsigned long *)0x4c000014) /*PWM & Timer registers*/
#define TCFG0 (*(volatile unsigned long *)0x51000000)
#define TCFG1 (*(volatile unsigned long *)0x51000004)
#define TCON (*(volatile unsigned long *)0x51000008)
#define TCNTB0 (*(volatile unsigned long *)0x5100000c)
#define TCMPB0 (*(volatile unsigned long *)0x51000010)
#define TCNTO0 (*(volatile unsigned long *)0x51000014) /* I2C registers */
#define IICCON (*(volatile unsigned char *)0x54000000) // IIC control
#define IICSTAT (*(volatile unsigned char *)0x54000004) // IIC status
#define IICADD (*(volatile unsigned char *)0x54000008) // IIC address
#define IICDS (*(volatile unsigned char *)0x5400000c) // IIC data shift // LCD CONTROLLER
#define LCDCON1 (*(volatile unsigned long *)0x4d000000) //LCD control 1
#define LCDCON2 (*(volatile unsigned long *)0x4d000004) //LCD control 2
#define LCDCON3 (*(volatile unsigned long *)0x4d000008) //LCD control 3
#define LCDCON4 (*(volatile unsigned long *)0x4d00000c) //LCD control 4
#define LCDCON5 (*(volatile unsigned long *)0x4d000010) //LCD control 5
#define LCDSADDR1 (*(volatile unsigned long *)0x4d000014) //STN/TFT Frame buffer start address 1
#define LCDSADDR2 (*(volatile unsigned long *)0x4d000018) //STN/TFT Frame buffer start address 2
#define LCDSADDR3 (*(volatile unsigned long *)0x4d00001c) //STN/TFT Virtual screen address set
#define REDLUT (*(volatile unsigned long *)0x4d000020) //STN Red lookup table
#define GREENLUT (*(volatile unsigned long *)0x4d000024) //STN Green lookup table
#define BLUELUT (*(volatile unsigned long *)0x4d000028) //STN Blue lookup table
#define DITHMODE (*(volatile unsigned long *)0x4d00004c) //STN Dithering mode
#define TPAL (*(volatile unsigned long *)0x4d000050) //TFT Temporary palette
#define LCDINTPND (*(volatile unsigned long *)0x4d000054) //LCD Interrupt pending
#define LCDSRCPND (*(volatile unsigned long *)0x4d000058) //LCD Interrupt source
#define LCDINTMSK (*(volatile unsigned long *)0x4d00005c) //LCD Interrupt mask
#define LPCSEL (*(volatile unsigned long *)0x4d000060) //LPC3600 Control
#define PALETTE 0x4d000400 //Palette start address #define ISR_EINT0_OFT 0
#define ISR_EINT1_OFT 1
#define ISR_EINT2_OFT 2
#define ISR_EINT3_OFT 3
#define ISR_EINT4_7_OFT 4
#define ISR_EINT8_23_OFT 5
#define ISR_NOTUSED6_OFT 6
#define ISR_BAT_FLT_OFT 7
#define ISR_TICK_OFT 8
#define ISR_WDT_OFT 9
#define ISR_TIMER0_OFT 10
#define ISR_TIMER1_OFT 11
#define ISR_TIMER2_OFT 12
#define ISR_TIMER3_OFT 13
#define ISR_TIMER4_OFT 14
#define ISR_UART2_OFT 15
#define ISR_LCD_OFT 16
#define ISR_DMA0_OFT 17
#define ISR_DMA1_OFT 18
#define ISR_DMA2_OFT 19
#define ISR_DMA3_OFT 20
#define ISR_SDI_OFT 21
#define ISR_SPI0_OFT 22
#define ISR_UART1_OFT 23
#define ISR_NOTUSED24_OFT 24
#define ISR_USBD_OFT 25
#define ISR_USBH_OFT 26
#define ISR_IIC_OFT 27
#define ISR_UART0_OFT 28
#define ISR_SPI1_OFT 29
#define ISR_RTC_OFT 30
#define ISR_ADC_OFT 31 // PENDING BIT
#define BIT_EINT0 (0x1)
#define BIT_EINT1 (0x1<<1)
#define BIT_EINT2 (0x1<<2)
#define BIT_EINT3 (0x1<<3)
#define BIT_EINT4_7 (0x1<<4)
#define BIT_EINT8_23 (0x1<<5)
#define BIT_CAM (0x1<<6) // Added for 2440.
#define BIT_BAT_FLT (0x1<<7)
#define BIT_TICK (0x1<<8)
#define BIT_WDT_AC97 (0x1<<9)
#define BIT_TIMER0 (0x1<<10)
#define BIT_TIMER1 (0x1<<11)
#define BIT_TIMER2 (0x1<<12)
#define BIT_TIMER3 (0x1<<13)
#define BIT_TIMER4 (0x1<<14)
#define BIT_UART2 (0x1<<15)
#define BIT_LCD (0x1<<16)
#define BIT_DMA0 (0x1<<17)
#define BIT_DMA1 (0x1<<18)
#define BIT_DMA2 (0x1<<19)
#define BIT_DMA3 (0x1<<20)
#define BIT_SDI (0x1<<21)
#define BIT_SPI0 (0x1<<22)
#define BIT_UART1 (0x1<<23)
#define BIT_NFCON (0x1<<24) // Added for 2440.
#define BIT_USBD (0x1<<25)
#define BIT_USBH (0x1<<26)
#define BIT_IIC (0x1<<27)
#define BIT_UART0 (0x1<<28)
#define BIT_SPI1 (0x1<<29)
#define BIT_RTC (0x1<<30)
#define BIT_ADC (0x1<<31)
#define BIT_ALLMSK (0xffffffff) #define BIT_SUB_ALLMSK (0x7fff)
#define BIT_SUB_AC97 (0x1<<14)
#define BIT_SUB_WDT (0x1<<13)
#define BIT_SUB_CAM_S (0x1<<12) // Added for 2440.
#define BIT_SUB_CAM_C (0x1<<11) // Added for 2440.
#define BIT_SUB_ADC (0x1<<10)
#define BIT_SUB_TC (0x1<<9)
#define BIT_SUB_ERR2 (0x1<<8)
#define BIT_SUB_TXD2 (0x1<<7)
#define BIT_SUB_RXD2 (0x1<<6)
#define BIT_SUB_ERR1 (0x1<<5)
#define BIT_SUB_TXD1 (0x1<<4)
#define BIT_SUB_RXD1 (0x1<<3)
#define BIT_SUB_ERR0 (0x1<<2)
#define BIT_SUB_TXD0 (0x1<<1)
#define BIT_SUB_RXD0 (0x1<<0) #define GSTATUS1 (*(volatile unsigned long *)0x560000B0)
main.c
#include"uart.h"
#include"my_stdio.h"
#include"screen_touch.h" void raise(int sig_nr){;} int main(void)
{
uart0_init();
while()
screen_touch();
return ;
}
uart.lds
SECTIONS
{
. = 0x00000000;
.init : AT(){start.o init.o nand.o}
. = 0x30000000;
.text : AT(){*(.text)}
.rodata ALIGN() : AT((LOADADDR(.text)+SIZEOF(.text)+)&~(0x03)) {*(.rodata*)}
.data ALIGN() : AT((LOADADDR(.rodata)+SIZEOF(.rodata)+)&~(0x03)) {*(.data)}
.bss : {*(.bss) *(COMMON)}
}
Makefile:
objs:= start.o init.o uart.o nand.o main.o my_stdio.o scrennt_touch.o interrupt.o lib/libc.a CC =arm-linux-gcc
LD =arm-linux-ld
AR =arm-linux-ar
OBJCOPY =arm-linux-objcopy
OBJDUMP =arm-linux-objdump INCLUDEDIR :=$(shell pwd)/include
CFLAGS :=-Wall -O2
CPPFLAGS :=-nostdinc -I$(INCLUDEDIR) export CC LD OBJCOPY OBJDUMP INCLUDEDIR CFLAGS CPPFLAGS uart.bin:$(objs)
arm-linux-ld -Tuart.lds -o uart_elf $^ libgcc.a
arm-linux-objcopy -O binary -S uart_elf $@
arm-linux-objdump -D -m arm uart_elf > uart.dis .PHONY:lib/libc.a
lib/libc.a:
cd lib;make;cd .. %.o:%.s
$(CC) $(CPPFLAGS) $(FLAGS)-o $@ -c $< %.o:%.c
$(CC) $(CPPFLAGS) $(FLAGS) -o $@ -c $< clean:
make clean -C lib
rm -f *.o *.bin *.dis uart_elf