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unsigned char CH450_buf2[6]; //定義6個(gè)數(shù)碼管的數(shù)據(jù)映象緩存區(qū)
//const unsigned char BCD_decode_tab[0x10] = { 0X3F, 0X06, 0X5B, 0X4F, 0X66, 0X6D, 0X7D, 0X07, 0X7F, 0X6F, 0X77, 0X7C, 0X58, 0X5E, 0X79, 0X71 };
void CH455_Init(void)
{
unsigned char i;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB //管腳時(shí)鐘PB
,ENABLE);//管腳時(shí)鐘PB //使能GPIOB時(shí)鐘
//stm32f103中PB3、PB4、PA15為JTAG引腳，若要作為普通IO口來使用的話，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_6|GPIO_Pin_7;//GPIO_Pin_6--SCL GPIO_Pin_7--SDA
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT ; //輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;//推挽輸出 開漏輸出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_6|GPIO_Pin_7);
DelayUs(1000);
CH450_buf_write(CH455_SYSOFF); // 關(guān)閉休眠
CH450_buf_write(CH455_7SEG_ON); // 開啟數(shù)碼管
CH450_buf_write(CH455_SYSON_8); // 開啟亮度
CH450_buf_write(CH455_SYSON1); // 開啟顯示
for( i=0; i<4; i++ ) CH450_buf_index( i, 0x00 ); // 清空
// CH455_Write( CH455_SYSON_8 ); //八段式
}
/*
* 函數(shù)功能：IIC產(chǎn)生起始信號函數(shù)
* 輸入?yún)?shù)：無
* 輸出參數(shù)：無
*/
void CH455_I2c_Start(void)
{
CH455_SDA_D_OUT();
CH455_SCL_H; //SCL = high;
DelayUs(I2C_DELAY);
CH455_SDA_H ; //SDA = high;
DelayUs(I2C_DELAY);
CH455_SDA_L ; //SDA = low;
DelayUs(I2C_DELAY);
CH455_SCL_L; //SCL = low;
DelayUs(I2C_DELAY);
}
/*
* 函數(shù)功能：IIC產(chǎn)生停止信號
* 輸入?yún)?shù)：無
* 輸出參數(shù)：無
*/
void CH455_I2c_Stop(void)
{
CH455_SDA_D_OUT();
CH455_SCL_L;; //SCL = low;
DelayUs(I2C_DELAY);
CH455_SDA_L; //SDA = low;
DelayUs(I2C_DELAY);
CH455_SCL_H; //SCL = high;
DelayUs(I2C_DELAY);
CH455_SDA_H;; //SDA = high;
DelayUs(I2C_DELAY);
}
/*
* 函數(shù)功能：IIC發(fā)送一個(gè)字節(jié)
* 輸入?yún)?shù)：一個(gè)字節(jié)
* 輸出參數(shù)：無
*/
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_H; //SDA=high;
else
CH455_SDA_L; //SDA=low;
DelayUs(I2C_DELAY);
CH455_SCL_H; //SCL=high;
DelayUs(I2C_DELAY);
CH455_SCL_L; //SCL=low;
DelayUs(I2C_DELAY);
IIC_Byte<<=1;
}
DelayUs(I2C_DELAY);
CH455_SDA_H; //SDA=1;
DelayUs(I2C_DELAY);
CH455_SCL_H; //SCL=1;
DelayUs(I2C_DELAY);
CH455_SCL_L; //SCL=0;
DelayUs(I2C_DELAY);
}
unsigned char CH455_I2c_RdByte( void ) //讀一個(gè)字節(jié)數(shù)據(jù)
{
unsigned char i, bytedata;
CH455_SDA_D_IN(); //將數(shù)據(jù)設(shè)置為輸入模式
DelayUs(I2C_DELAY);
CH455_SDA_H; //數(shù)據(jù)線拉高
DelayUs(I2C_DELAY);
CH455_SCL_L;
DelayUs(I2C_DELAY);
for(i = 0; i < 8; i++) //讀8位數(shù)據(jù)
{
CH455_SCL_H;
DelayUs(I2C_DELAY);
bytedata <<= 1;
DelayUs(I2C_DELAY);
bytedata |= (CH455_SDA_IN);
DelayUs(I2C_DELAY);
CH455_SCL_L;
DelayUs(I2C_DELAY);
}
CH455_SDA_D_OUT(); //數(shù)據(jù)線設(shè)置回輸出模式
CH455_SDA_H; //SDA=1;
DelayUs(I2C_DELAY);
CH455_SCL_H; //SCL=1;
DelayUs(I2C_DELAY);
CH455_SCL_L; //SCL=0;
DelayUs(I2C_DELAY);
return(bytedata);//返回?cái)?shù)據(jù)
}
void CH455_Write( UINT16 cmd ) //寫命令
{
CH455_I2c_Start(); //啟動總線
CH455_I2c_WrByte(((UINT8)(cmd>>7)&CH455_I2C_MASK)|CH455_I2C_ADDR);
CH455_I2c_WrByte((UINT8)cmd); //發(fā)送數(shù)據(jù)
CH455_I2c_Stop(); //結(jié)束總線
}
UINT8 CH455_Read( void ) //讀取按鍵
{
UINT8 keycode;
CH455_I2c_Start(); //啟動總線
CH455_I2c_WrByte((UINT8)(CH455_GET_KEY>>7)&CH455_I2C_MASK|0x01|CH455_I2C_ADDR);
keycode=CH455_I2c_RdByte(); //讀取數(shù)據(jù)
CH455_I2c_Stop(); //結(jié)束總線
return keycode;
}
/*********************************************/
void CH450_buf_write( unsigned short cmd ) // 向CH450輸出數(shù)據(jù)或者操作命令,自動建立數(shù)據(jù)映象
{
if ( cmd & 0x1000 ) { // 加載數(shù)據(jù)的命令,需要備份數(shù)據(jù)到映象緩沖區(qū)
CH450_buf2[ (unsigned char)( ( cmd >> 8 ) - 2 ) & 0x07 ] = (unsigned char)( cmd & 0xFF ); // 備份數(shù)據(jù)到相應(yīng)的映象單元
}
CH455_Write( cmd ); // 發(fā)出
}
void CH450_buf_index( unsigned char index, unsigned char dat ) // 向CH450指定的數(shù)碼管輸出數(shù)據(jù),自動建立數(shù)據(jù)映象
// index 為數(shù)碼管序號,有效值為0到5,分別對應(yīng)DIG2到DIG7
{
unsigned short cmd;
CH450_buf2[ index ] = dat; // 備份數(shù)據(jù)到相應(yīng)的映象單元
// cmd = ( CH455_DIG2 + ( (unsigned short)index << 8 ) ) | dat ; // 生成操作命令
cmd = ( CH455_DIG0 + ( (unsigned short)index << 8 ) ) | dat ; // 生成操作命令
CH455_Write( cmd ); // 發(fā)出
}
void CH450_set_bit(unsigned char bit_addr) //段位點(diǎn)亮
{
unsigned char byte_addr;
byte_addr=(bit_addr&0x38)>>3;
if ( byte_addr < 6 ) CH450_buf_index( byte_addr, CH450_buf2[byte_addr] | (1<<(bit_addr&0x07)) );
}
void CH450_clr_bit(unsigned char bit_addr) //段位熄滅
{
unsigned char byte_addr;
byte_addr=(bit_addr&0x38)>>3;
if ( byte_addr < 6 ) CH450_buf_index( byte_addr, CH450_buf2[byte_addr] & ~(1<<(bit_addr&0x07)) );
}
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