|
|
單片機(jī)型號(hào)：STM8AF5286UC
SCL PB4
SDA PB5
/////////////////////////////觸摸按鍵端口和引腳配置//////////////////////////////
#define Touch_IIC_PORT GPIOB // 觸摸按鍵引腳配置 SCL PB4;SDA PB5;INT PB3
#define Touch_IIC_SDA GPIO_PIN_5
#define Touch_IIC_SCL GPIO_PIN_4
#define Touch_Key_Int GPIO_PIN_3 //PB3 觸摸按鍵INT輸入
#define CON_ADDR 0x81 // {A[6:0] + RWB} = 81H
#define SDA_On GPIO_WriteHigh(Touch_IIC_PORT,Touch_IIC_SDA)
#define SDA_Off GPIO_WriteLow(Touch_IIC_PORT,Touch_IIC_SDA)
#define SCL_On GPIO_WriteHigh(Touch_IIC_PORT,Touch_IIC_SCL)
#define SCL_Off GPIO_WriteLow(Touch_IIC_PORT,Touch_IIC_SCL)
///////////////////////////////////////////////////////////////////////////////
unsigned int Touch_Data; //觸摸按鍵的值
unsigned int ReadKey(void)
{
unsigned char bitnum,temp,addr;
unsigned int key2byte;
unsigned char bit_temp;
addr=CON_ADDR;
key2byte=0xffff;
SDA_Off; // 拉低 SDA 端口送出 START 信號(hào)
for(temp=0;temp<4;temp++){} //延時(shí)
//發(fā)送 8 位地址字節(jié) (A[6:0]+RWB)
for(bitnum=0;bitnum<8;bitnum++)
{
SCL_Off;
temp=addr&0x80;
if(temp==0x80)
{SDA_On;}
else
{SDA_Off;}
addr=addr<<1;
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_On;
for(temp=0;temp<40;temp++){} //延時(shí)
}
SDA_On; //釋放 SDA 端口,將 SDA 設(shè)置為輸入端口
SCL_Off;
GPIO_Init(Touch_IIC_PORT,Touch_IIC_SDA,GPIO_MODE_IN_PU_NO_IT );//SDA輸入
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_On;
for(temp=0;temp<40;temp++){} //延時(shí)
bit_temp=GPIO_ReadInputPin(Touch_IIC_PORT,Touch_IIC_SDA) ;
//if(bit_temp==0x01) //讀 ack 回應(yīng)
//ERR=0; //ack 信號(hào)沒有讀到，指示通信有誤
//讀 16 位按鍵數(shù)據(jù)字節(jié)(D[15:0])
for(bitnum=0;bitnum<16;bitnum++)
{
SCL_Off;
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_On;
for(temp=0;temp<40;temp++){} //延時(shí)
bit_temp=GPIO_ReadInputPin(Touch_IIC_PORT,Touch_IIC_SDA) ;
if(bit_temp==0x01)
{
key2byte=key2byte<<1;
key2byte=key2byte|0x01;
}
else
{
key2byte=key2byte<<1;
}
}
GPIO_Init(Touch_IIC_PORT,Touch_IIC_SDA,GPIO_MODE_OUT_PP_HIGH_FAST );//SDA輸出
SCL_Off;
SDA_On;
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_On; //發(fā)送 NACK 信號(hào)
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_Off;
SDA_Off;
for(temp=0;temp<40;temp++){} //延時(shí)
SCL_On;
for(temp=0;temp<40;temp++){} //延時(shí)
SDA_On;
key2byte=key2byte^0xffff;
return(key2byte);
}
void IO_config(void)
{
GPIO_Init(Touch_IIC_PORT,Touch_Key_Int,GPIO_MODE_IN_PU_NO_IT ); //INT輸入
GPIO_Init(Touch_IIC_PORT,Touch_IIC_SCL,GPIO_MODE_OUT_PP_HIGH_FAST );//SCL輸出
GPIO_Init(Touch_IIC_PORT,Touch_IIC_SDA,GPIO_MODE_OUT_PP_HIGH_FAST );//SDA輸出
//GPIO_Init(Touch_IIC_PORT,Touch_IIC_SDA,GPIO_MODE_IN_PU_NO_IT );//SDA輸入
}
int main(void)
{
/*設(shè)置內(nèi)部高速時(shí)鐘16M為主時(shí)鐘*/
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
IO_config();
while(1)
{
if (GPIO_ReadInputPin(Touch_IIC_PORT,Touch_Key_Int) == 0)
{
Touch_Data=ReadKey();
if(Touch_Data==0x0400)
{BAR1_Y_ON();}
else if(Touch_Data==0x0800)
{BAR2_Y_ON();}
else if(Touch_Data==0x1000)
{BAR3_Y_ON();}
else
{;}
}
else
{
BAR1_Y_OFF();BAR2_Y_OFF();BAR3_Y_OFF();
}
}
|
|
