/* * 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 // } }