S3C2451_uart_ARM 직렬 작업
33778 단어 ARM
설정하고자 하는 직렬 번호, 포트 속도, 비트 비트 너비와 정지 위치를 입력하면 직렬 포트 속도와 수신 문자, 발송 문자열, 직렬 인터럽트 등 함수를 자동으로 설정합니다. 잘못된 점이 있으면 가르쳐 주십시오!
/*UART*/
#define ULCON0 (*(volatile unsigned long *)0x50000000)
#define ULCON1 (*(volatile unsigned long *)0x50004000)
#define ULCON2 (*(volatile unsigned long *)0x50008000)
#define ULCON3 (*(volatile unsigned long *)0x5000c000)
#define UCON0 (*(volatile unsigned long *)0x50000004)
#define UCON1 (*(volatile unsigned long *)0x50004004)
#define UCON2 (*(volatile unsigned long *)0x50008004)
#define UCON3 (*(volatile unsigned long *)0x5000c004)
#define UFCON0 (*(volatile unsigned long *)0x50000008)
#define UFCON1 (*(volatile unsigned long *)0x50004008)
#define UFCON2 (*(volatile unsigned long *)0x50008008)
#define UFCON3 (*(volatile unsigned long *)0x5000c008)
#define UMCON0 (*(volatile unsigned long *)0x5000000c)
#define UMCON1 (*(volatile unsigned long *)0x5000400c)
#define UMCON2 (*(volatile unsigned long *)0x5000800c)
#define UTRSTAT0 (*(volatile unsigned long *)0x50000010)
#define UTRSTAT1 (*(volatile unsigned long *)0x50004010)
#define UTRSTAT2 (*(volatile unsigned long *)0x50008010)
#define UTRSTAT3 (*(volatile unsigned long *)0x5000c010)
#define UERSTAT0 (*(volatile unsigned long *)0x50000014)
#define UERSTAT1 (*(volatile unsigned long *)0x50004014)
#define UERSTAT2 (*(volatile unsigned long *)0x50008014)
#define UERSTAT3 (*(volatile unsigned long *)0x5000c014)
#define UFSTAT0 (*(volatile unsigned long *)0x50000018)
#define UFSTAT1 (*(volatile unsigned long *)0x50004018)
#define UFSTAT2 (*(volatile unsigned long *)0x50008018)
#define UFSTAT3 (*(volatile unsigned long *)0x5000c018)
#define UMSTAT0 (*(volatile unsigned long *)0x5000001c)
#define UMSTAT1 (*(volatile unsigned long *)0x5000401c)
#define UMSTAT2 (*(volatile unsigned long *)0x5000801c)
#define UTXH0 (*(volatile unsigned long *)0x50000020)
#define UTXH1 (*(volatile unsigned long *)0x50004020)
#define UTXH2 (*(volatile unsigned long *)0x50008020)
#define UTXH3 (*(volatile unsigned long *)0x5000c020)
#define URXH0 (*(volatile unsigned long *)0x50000024)
#define URXH1 (*(volatile unsigned long *)0x50004024)
#define URXH2 (*(volatile unsigned long *)0x50008024)
#define URXH3 (*(volatile unsigned long *)0x5000c024)
#define UBRDIV0 (*(volatile unsigned long *)0x50000028)
#define UBRDIV1 (*(volatile unsigned long *)0x50004028)
#define UBRDIV2 (*(volatile unsigned long *)0x50008028)
#define UBRDIV3 (*(volatile unsigned long *)0x5000c028)
#define UDIVSLOT0 (*(volatile unsigned long *)0x5000002c)
#define UDIVSLOT1 (*(volatile unsigned long *)0x5000402c)
#define UDIVSLOT2 (*(volatile unsigned long *)0x5000802c)
#define UDIVSLOT3 (*(volatile unsigned long *)0x5000c02c)/* */
typedef enum
{
UART0 = 0,
UART1,
UART2,
UART3
}UART_TyPeDef;
/* */
typedef enum
{
DATA_WIDTH_5BIT = 0,
DATA_WIDTH_6BIT,
DATA_WIDTH_7BIT,
DATA_WIDTH_8BIT
}DATA_WTDTH_TyPeDef;
/* */
typedef enum
{
STOP_BIT0 = 0,
STOP_BIT1
}STOP_BIT_TyPeDef;#ifndef _TYPEDEF_H_
#define _TYPEDEF_H_
#define U32 unsigned int
#define U16 unsigned short
#define S32 int
#define S16 short int
#define U8 unsigned char
#define S8 char
#define TRUE 1
#define FALSE 0
#endif
/*========================================================
function ：
arguments：ART_TyPeDef uartx
DATA_WTDTH_TyPeDef bit_w
STOP_BIT_TyPeDef stop
========================================================*/
void uart_init(UART_TyPeDef uartx, U32 bps, DATA_WTDTH_TyPeDef bit_w, STOP_BIT_TyPeDef stop)
{
float femp; // DIV_VAL
switch(uartx)
{
case UART0:
{
ULCON0 &= ~0x3; // （ ）
switch (bit_w)
{
// 5、6、7、8bit
case DATA_WIDTH_5BIT: ULCON0 |= 0x00;break;
case DATA_WIDTH_6BIT: ULCON0 |= 0x01;break;
case DATA_WIDTH_7BIT: ULCON0 |= 0x02;break;
case DATA_WIDTH_8BIT: ULCON0 |= 0x03;break;
}
ULCON0 &= ~0x4; //
if (stop == STOP_BIT1)
{
ULCON0 |= 0x4;
}
//
// HCLK AHB
// PCLK APB
// UART0123 APB
// DIV_VAL = (PCLK / (bps x 16 ) ) - 1 = (66000000/(115200x16))-1 = 34.807
// DIV_VAL = 34.807
UBRDIV0 = (int)((66000000/(bps * 16)) - 1);
femp = (float)(66000000/(float)(bps * 16)) - 1 - UBRDIV0;
VOIDSET(UART0, femp);
break;
}
case UART1:
{
ULCON1 &= ~0x3; //Çå¿Õ×îµÍÁ½Î»£¨Êý¾Ý¿í¶È£©
switch (bit_w)
{
// 5、6、7、8bit
case DATA_WIDTH_5BIT: ULCON1 |= 0x00;break;
case DATA_WIDTH_6BIT: ULCON1 |= 0x01;break;
case DATA_WIDTH_7BIT: ULCON1 |= 0x02;break;
case DATA_WIDTH_8BIT: ULCON1 |= 0x03;break;
}
ULCON1 &= ~0x4; //Çå³ýֹͣλ£¬Ê¹ÆäΪ0
if (stop == STOP_BIT1)
{
ULCON1 |= 0x4;
}
UBRDIV1 = (int)((66000000/(bps * 16)) - 1);
femp = (float)(66000000/(float)(bps * 16)) - 1 - UBRDIV1;
VOIDSET(UART1, femp);
break;
}
case UART2:
{
ULCON2 &= ~0x3;
switch (bit_w)
{
// 5、6、7、8bit
case DATA_WIDTH_5BIT: ULCON2 |= 0x00;break;
case DATA_WIDTH_6BIT: ULCON2 |= 0x01;break;
case DATA_WIDTH_7BIT: ULCON2 |= 0x02;break;
case DATA_WIDTH_8BIT: ULCON2 |= 0x03;break;
}
ULCON2 &= ~0x4; // ， 0
if (stop == STOP_BIT1)
{
ULCON2 |= 0x4;
}
UBRDIV2 = (int)((66000000/(bps * 16)) - 1);
femp = (float)(66000000/(float)(bps * 16)) - 1 - UBRDIV2;
VOIDSET(UART2, femp);
break;
}
case UART3:
{
ULCON3 &= ~0x3; //Çå¿Õ×îµÍÁ½Î»£¨Êý¾Ý¿í¶È£©
switch (bit_w)
{
// 5、6、7、8bit
case DATA_WIDTH_5BIT: ULCON3 |= 0x00;break;
case DATA_WIDTH_6BIT: ULCON3 |= 0x01;break;
case DATA_WIDTH_7BIT: ULCON3 |= 0x02;break;
case DATA_WIDTH_8BIT: ULCON3 |= 0x03;break;
}
ULCON3 &= ~0x4;
if (stop == STOP_BIT1)
{
ULCON3 |= 0x4;
}
UBRDIV3 = (int)((66000000/(bps * 16)) - 1);
femp = (float)(66000000/(float)(bps * 16)) - 1 - UBRDIV3;
VOIDSET(UART3, femp);
break;
}
}
}
/*====================================================================
function： DIV_VAL UDIVSLOT
arguments：ART_TyPeDef uartx
femp： Floating point part
====================================================================*/
void VOIDSET(UART_TyPeDef uartx, float femp)
{
S32 i;
float absnum = 0.0;
float min = femp;
float src[16] = {0,0.0625,0.125,0.18175,0.25,0.3125,0.375,0.4375,0.5,0.5625,0.625,0.6875,0.75,0.8125,0.875,0.9375};
// femp
for (i = 0; i <= 15; i++)
{
absnum = src[i] - femp;
if (absnum < 0)
{
absnum = -absnum;
}
if (absnum < min)
{
min = absnum;
}
}
//
for (i = 0; i <= 15; i++)
{
absnum = src[i] - femp;
if (absnum < 0)
{
absnum = -absnum;
}
if (absnum == min)
{
break;
}
}
// UDIVSLOT
switch(uartx)
{
case UART0:
{
switch(i)
{
case 0:UDIVSLOT0 = 0x0000;break;
case 1:UDIVSLOT0 = 0x0080;break;
case 2:UDIVSLOT0 = 0x0808;break;
case 3:UDIVSLOT0 = 0x0888;break;
case 4:UDIVSLOT0 = 0x2222;break;
case 5:UDIVSLOT0 = 0x4924;break;
case 6:UDIVSLOT0 = 0x4A52;break;
case 7:UDIVSLOT0 = 0x54AA;break;
case 8:UDIVSLOT0 = 0x5555;break;
case 9:UDIVSLOT0 = 0xD555;break;
case 10:UDIVSLOT0 = 0xD5D5;break;
case 11:UDIVSLOT0 = 0xDDD5;break;
case 12:UDIVSLOT0 = 0xDDDD;break;
case 13:UDIVSLOT0 = 0xDFDD;break;
case 14:UDIVSLOT0 = 0xDFDF;break;
case 15:UDIVSLOT0 = 0xFFDF;break;
default:break;
}
break;
}
case UART1:
{
switch(i)
{
case 0:UDIVSLOT1 = 0x0000;break;
case 1:UDIVSLOT1 = 0x0080;break;
case 2:UDIVSLOT1 = 0x0808;break;
case 3:UDIVSLOT1 = 0x0888;break;
case 4:UDIVSLOT1 = 0x2222;break;
case 5:UDIVSLOT1 = 0x4924;break;
case 6:UDIVSLOT1 = 0x4A52;break;
case 7:UDIVSLOT1 = 0x54AA;break;
case 8:UDIVSLOT1 = 0x5555;break;
case 9:UDIVSLOT1 = 0xD555;break;
case 10:UDIVSLOT1 = 0xD5D5;break;
case 11:UDIVSLOT1 = 0xDDD5;break;
case 12:UDIVSLOT1 = 0xDDDD;break;
case 13:UDIVSLOT1 = 0xDFDD;break;
case 14:UDIVSLOT1 = 0xDFDF;break;
case 15:UDIVSLOT1 = 0xFFDF;break;
default:break;
}
break;
}
case UART2:
{
switch(i)
{
case 0:UDIVSLOT2 = 0x0000;break;
case 1:UDIVSLOT2 = 0x0080;break;
case 2:UDIVSLOT2 = 0x0808;break;
case 3:UDIVSLOT2 = 0x0888;break;
case 4:UDIVSLOT2 = 0x2222;break;
case 5:UDIVSLOT2 = 0x4924;break;
case 6:UDIVSLOT2 = 0x4A52;break;
case 7:UDIVSLOT2 = 0x54AA;break;
case 8:UDIVSLOT2 = 0x5555;break;
case 9:UDIVSLOT2 = 0xD555;break;
case 10:UDIVSLOT2 = 0xD5D5;break;
case 11:UDIVSLOT2 = 0xDDD5;break;
case 12:UDIVSLOT2 = 0xDDDD;break;
case 13:UDIVSLOT2 = 0xDFDD;break;
case 14:UDIVSLOT2 = 0xDFDF;break;
case 15:UDIVSLOT2 = 0xFFDF;break;
default:break;
}
break;
}
case UART3:
{
switch(i)
{
case 0:UDIVSLOT3 = 0x0000;break;
case 1:UDIVSLOT3 = 0x0080;break;
case 2:UDIVSLOT3 = 0x0808;break;
case 3:UDIVSLOT3 = 0x0888;break;
case 4:UDIVSLOT3 = 0x2222;break;
case 5:UDIVSLOT3 = 0x4924;break;
case 6:UDIVSLOT3 = 0x4A52;break;
case 7:UDIVSLOT3 = 0x54AA;break;
case 8:UDIVSLOT3 = 0x5555;break;
case 9:UDIVSLOT3 = 0xD555;break;
case 10:UDIVSLOT3 = 0xD5D5;break;
case 11:UDIVSLOT3 = 0xDDD5;break;
case 12:UDIVSLOT3 = 0xDDDD;break;
case 13:UDIVSLOT3 = 0xDFDD;break;
case 14:UDIVSLOT3 = 0xDFDF;break;
case 15:UDIVSLOT3 = 0xFFDF;break;
default:break;
}
break;
}
default:
{
break;
}
}
}
void Uart_SendData(U8 data)
{
UTXH0 = data;
while( (UTRSTAT0&(1<<2)) == 0);
}
void UART_SendDataBuf(unsigned char *dat,unsigned int len)
{
unsigned char i;
for(i=0;ivoid)
{
//while( (UTRSTAT0&(1<<0)) == 0);
return (URXH0);
}
void Uart_Printf(char *fmt,...)
{
va_list ap;
char string[1024];
va_start(ap,fmt);
vsprintf(string,fmt,ap);
va_end(ap);
Uart_SendString(string); //default send from uart0
}
void Uart_SendString(char *s)
{
while(*s)
{
Uart_SendData(*s++);
}
}
void UART_Interrupt_IRQInit(UART_TypeDef UARTx,U32 addr)
{
switch(UARTx)
{
case UART0: pISR_UART0=addr;break;
case UART1: pISR_UART1=addr;break;
case UART2: pISR_UART2=addr;break;
default:
break;
}
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