0301_BOOT/Bsp/ch455h.c

/*
 * File:   CH455.c
 * Author: JiangXiaowei
 */
 
#include "ch455h.h"		// 修改该文件以适应硬件环境/单片机型号等
//#include "delay.h"
#include "systick.h"
 
//定义
#define I2C_DELAY 10
 

const UINT8 BCD_decode_tab[0x10] = {
	
	0x3F,//0011 1111B,0
	0x06,//0000 0110B,1
	0x5B,//0101 1011B,2
	0x4F,//0100 1111B,3
	0x66,//0110 0110B,4
	0x6D,//0110 1101B,5
	0x7D,//0111 1101B,6
	0x27,//0010 0111B,7
	0x7F,//0111 1111B,8
	0x6F,//0110 1111B,9
	
	0x77,//0011 0111B,A
	0x7C,//0111 1100B,B
	0x58,//0011 1001B,C
	0x5E,//0101 1110B,D
	0x79,//0111 1001B,E
	0x71 //0111 0001B,F
};//BCD

									 
									 
const UINT8 Letter_tab[38] = {
	0x3F,//0011 1111B,0
	0x06,//0000 0110B,1
	0x5B,//0101 1011B,2
	0x4F,//0100 1111B,3
	0x66,//0110 0110B,4
	0x6D,//0110 1101B,5
	0x7D,//0111 1101B,6
	0x27,//0010 0111B,7
	0x7F,//0111 1111B,8
	0x6F,//0110 1111B,9
	0x77,//0011 0111B,A
	0x7C,//0111 1100B,B
	0x58,//0011 1001B,C
	0x5E,//0101 1110B,D
	0x79,//0111 1001B,E
	0x71,//0111 0001B,F
	0x3D,//0011 1101B,G
	0x76,//0111 0110B,H
	0x10,//0001 0000B,I
	0x0E,//0000 1110B,J
	0x7A,//0111 1010B,K
	0x38,//0011 1000B,L
	0x55,//0101 0101B,M
	0x54,//0101 0100B,N
	0x5C,//0101 1100B,O
	0x73,//0111 0011B,P
	0x67,//0110 0111B,Q
	0x50,//0101 0000B,R
	0x65,//0110 0101B,S
	0x78,//0111 1000B,T
	0x3E,//0011 1110B,U
	0x1C,//0001 1100B,V
	0x6A,//0110 1010B,W
	0x64,//0110 0100B,X
	0x6E,//0110 1110B,Y
	0x5A,//0101 1010B,Z
	0x40,//0100 0000B,-
	0x00//0000 0000B,灭
};//BCD
 
 
 
void CH455_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE );	//使能GPIOB时钟
 
	
	//stm32f103中PB3、PB4、PA15为JTAG引脚，若要作为普通IO口来使用的话，要禁用JTAG功能。
	//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
	//GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);  
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ;   //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	GPIO_SetBits(GPIOB,GPIO_Pin_10|GPIO_Pin_11); 	
	 
	CH455_Write( CH455_SYSON_8 );		//八段式
	
	EXTI_MY_INIT();
	
}
void CH455H_SCL_D_OUT(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD ;   //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	delay_us(I2C_DELAY);
}

void CH455H_SDA_D_OUT(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD ;   //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	delay_us(I2C_DELAY);
}

void CH455H_SDA_D_IN(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING ;   //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	delay_us(I2C_DELAY);
}

/*
 * 函数功能：IIC产生起始信号函数
 * 输入参数：无
 * 输出参数：无
 */
void CH455_I2c_Start(void)
{
    CH455_SDA_D_OUT;
    CH455_SCL = high;   //SCL = high;
    delay_us(I2C_DELAY);
    CH455_SDA = high;   //SDA = high;
    delay_us(I2C_DELAY);
    CH455_SDA = low;    //SDA = low;
    delay_us(I2C_DELAY);
    CH455_SCL = low;    //SCL = low;
    delay_us(I2C_DELAY);
}
 
/*
 * 函数功能：IIC产生停止信号
 * 输入参数：无
 * 输出参数：无
 */
void CH455_I2c_Stop(void)
{
    CH455_SDA_D_OUT;
    CH455_SCL = low;     //SCL = low;
    delay_us(I2C_DELAY);
    CH455_SDA = low;     //SDA = low;
    delay_us(I2C_DELAY);
    CH455_SCL = high;    //SCL = high;
    delay_us(I2C_DELAY);
    CH455_SDA = high;    //SDA = high;
    delay_us(I2C_DELAY);
}

 UINT8 IIC_Wait_Ack(void)
{
	UINT8 ucErrTime=0;
	CH455_SDA_D_IN;      		//SDA设置为输入  
	//CH455_SDA=1;delay_us(1);	   
	CH455_SCL=0;delay_us(1);	 
	while(READ_SDA)
	{
		ucErrTime++;
		if(ucErrTime>250)
		{
			CH455_I2c_Stop();
			return 1;
		}
		delay_us(1);
	}
	//CH455_SCL=0;//时钟输出0 	   
	return 0;  
} 

/*
 * 函数功能：IIC发送一个字节
 * 输入参数：一个字节
 * 输出参数：无
 */
void CH455_I2c_WrByte(unsigned char IIC_Byte)
{
    unsigned char i;
    CH455_SDA_D_OUT;
    for(i = 0; i < 8; i++)
    {
        if(IIC_Byte & 0x80)
            CH455_SDA = high;   //SDA=high;
        else
            CH455_SDA = low;   //SDA=low;
        delay_us(I2C_DELAY);
        CH455_SCL = high;      //SCL=high;
        delay_us(I2C_DELAY);
        CH455_SCL = low;       //SCL=low;
        delay_us(I2C_DELAY);
        IIC_Byte<<=1;
    }
    delay_us(I2C_DELAY);
    CH455_SDA = high;          //SDA=1;
    delay_us(I2C_DELAY);
    CH455_SCL = high;          //SCL=1;
    delay_us(I2C_DELAY);
    CH455_SCL = low;           //SCL=0;
    delay_us(I2C_DELAY);
}
 
unsigned char  CH455_I2c_RdByte( void )		//读一个字节数据
{    
    unsigned char i, bytedata;
    CH455_SDA_D_IN;     //将数据设置为输入模式
    delay_us(I2C_DELAY);
    CH455_SDA = 1;      //数据线拉高
    delay_us(I2C_DELAY);
    CH455_SCL = 0;
    delay_us(I2C_DELAY);
    for(i = 0; i < 8; i++)      //读8位数据
    {
        CH455_SCL = 1;
        delay_us(I2C_DELAY);
        bytedata <<= 1;
        delay_us(I2C_DELAY);
        bytedata |= (CH455_SDA_IN);
        delay_us(I2C_DELAY);
        CH455_SCL = 0;
        delay_us(I2C_DELAY);
    }
    CH455_SDA_D_OUT;            //数据线设置回输出模式
    CH455_SDA = high;          //SDA=1;
    delay_us(I2C_DELAY);
    CH455_SCL = high;          //SCL=1;
    delay_us(I2C_DELAY);
    CH455_SCL = low;           //SCL=0;
    delay_us(I2C_DELAY);
    return(bytedata);//返回数据
}
 
void CH455_Write( UINT16 cmd )	//写命令
{
	CH455_I2c_Start();               //启动总线
   	CH455_I2c_WrByte(((UINT8)(cmd>>7)&CH455_I2C_MASK)|CH455_I2C_ADDR);
   	CH455_I2c_WrByte((UINT8)cmd);     //发送数据
  	CH455_I2c_Stop();                 //结束总线 
}
 
UINT8 CH455_Read( void )		//读取按键
{
	UINT8 keycode;
   	CH455_I2c_Start();                //启动总线
   	CH455_I2c_WrByte((UINT8)(CH455_GET_KEY>>7)&CH455_I2C_MASK|0x01|CH455_I2C_ADDR);
   	keycode=CH455_I2c_RdByte();      //读取数据
	CH455_I2c_Stop();                //结束总线
	return keycode;
}

void EXTI_MY_INIT(void)
{
	
	GPIO_InitTypeDef GPIO_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure; 
	
 	NVIC_InitTypeDef NVIC_InitStructure;
	
	//GPIO的复用功能必须打开
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);


	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_1;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
	GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;   
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	

	//配置外部中断源并进行中断源和GPIO的连接
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource5);
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource1);

	EXTI_InitStructure.EXTI_Line =EXTI_Line5|EXTI_Line1;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);																//根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
	
	NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;						//使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;	//抢占优先级2， 
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;					//子优先级1
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;								//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure); 
	
	NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;						//使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;	//抢占优先级2， 
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;					//子优先级1
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;								//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure); 
}


volatile  UINT8 USER_BUTTON  = 0;

void EXTI1_IRQHandler(void)
{
	USER_BUTTON = 1;
	EXTI_ClearITPendingBit(EXTI_Line1);  //清除LINE11线路挂起位
}


void EXTI9_5_IRQHandler(void)
{
	
	if(KEY3==0)
	{
		USER_BUTTON = 3;
		EXTI_ClearITPendingBit(EXTI_Line5);  //清除LINE5线路挂起位
	}
//	if(KEY4==0)
//	{
//		USER_BUTTON = 4;
//		EXTI_ClearITPendingBit(EXTI_Line6);  //清除LINE6线路挂起位
//	}
	
}