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// Lcd module connections
sbit LCD_RS at P1_2_bit;
sbit LCD_EN at P1_3_bit;
sbit LCD_D4 at P1_4_bit;
sbit LCD_D5 at P1_5_bit;
sbit LCD_D6 at P1_6_bit;
sbit LCD_D7 at P1_7_bit;
// End Lcd module connections
// Software I2C connections
sbit Soft_I2C_Scl at P0_6_bit;
sbit Soft_I2C_Sda at P0_7_bit;
// End Software I2C connections
#define button1 P0_0_bit
#define button2 P0_1_bit
#define button3 P0_2_bit
#define button4 P0_3_bit
#define out1 P2_0_bit
#define out2 P2_1_bit
#define out3 P2_2_bit
#define out4 P2_3_bit
#define out5 P2_4_bit
#define out6 P2_5_bit
void ee_write(unsigned char adds, unsigned char value);
unsigned char ee_read(unsigned char adds);
char select;
void main() {
P0 =0xFF;
P2 = 0x00;
Soft_I2C_Init(); // Initialize Soft I2C communication
Lcd_Init(); // Initialize Lcd
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Out(1,1,"4CH AUDIO SWITCH");
Lcd_Out(2,1,"FW Version: 1.00");
Delay_ms(3000);
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Out(1,1,"4CH AUDIO SWITCH");
Lcd_Out(2,1,"Input Select:");
select = ee_read(1);
if(select>4){select=1;} // default 1
if(select==1) { Lcd_Chr(2,15,'1'); out1=out2=out3=out4=out5=out6=0;}
if(select==2) {Lcd_Chr(2,15,'2'); out1=out2=1; out3=out4=out5=out6=0;}
if(select==3) {Lcd_Chr(2,15,'3'); out1=out2=out3=out4=0; out5=out6=1;}
if(select==4) {Lcd_Chr(2,15,'4'); out1=out2=0; out3=out4=out5=out6=1;}
while(1)
{
if(!button1)
{
out1=out2=out3=out4=out5=out6=0;
Lcd_Chr(2,15,'1');
while(!button1);
Delay_ms(200);
ee_write(1,1);
}
else
if(!button2)
{
out1=out2=1; out3=out4=out5=out6=0;
Lcd_Chr(2,15,'2');
while(!button2);
Delay_ms(200);
ee_write(1,2);
}
else
if(!button3)
{
out1=out2=out3=out4=0; out5=out6=1;
Lcd_Chr(2,15,'3');
while(!button3);
Delay_ms(200);
ee_write(1,3);
}
if(!button4)
{
out1=out2=0; out3=out4=out5=out6=1;
Lcd_Chr(2,15,'4');
while(!button4);
Delay_ms(200);
ee_write(1,4);
}
}
}
void ee_write(unsigned char adds, unsigned char value)
{
Soft_I2c_Start();
Soft_I2c_Write(0xA0);
Soft_I2c_Write(adds);
Soft_I2c_Write(value);
Soft_I2c_Stop();
}
/////////
unsigned char ee_read(unsigned char adds)
{
unsigned char kq;
Soft_I2c_Start();
Soft_I2c_Write(0xA0);
Soft_I2c_Write(adds);
Soft_I2c_Start();
Soft_I2c_Write(0xA1);
kq=Soft_I2c_Read(0);
Soft_I2c_Stop();
return kq;
}
//////////////
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