void delay(int t)
{
while(t--);
}

void  main( void )
{

unsigned char ch1mode[]={0x50};
unsigned char ch2mode[]={0x54};
unsigned char ch3mode[]={0x58};

unsigned char ch1duty[]={0x53};
unsigned char ch2duty[]={0x57};
unsigned char ch3duty[]={0x5B};

unsigned char ch1modevalue[]={0xC0};
unsigned char ch2modevalue[]={0xC0};
unsigned char ch3modevalue[]={0xC0};

unsigned char ch1dutyvalue[]={0x55};
unsigned char ch2dutyvalue[]={0x45};
unsigned char ch3dutyvalue[]={0x45};

unsigned char read[]={0xA7};

UART0_Start();

    delay(2000);//2ms
   
 UART0_SendData(ch1duty,1) ;
 delay(2000);
 UART0_SendData(ch1dutyvalue,1) ;
 delay(2000);
 UART0_SendData(ch1mode,1) ;
 delay(2000);
 UART0_SendData(ch1modevalue,1) ;
 delay(2000);
   
   
   
 UART0_SendData(ch2duty,1) ;
 delay(2000);
 UART0_SendData(ch2dutyvalue,1) ;
 delay(6000);
 UART0_SendData(ch2mode,1) ;
 delay(2000);
 UART0_SendData(ch2modevalue,1) ;
 delay(2000);

 UART0_SendData(ch3duty,1) ;
 delay(2000);
 UART0_SendData(ch3dutyvalue,1) ;
 delay(2000);
 UART0_SendData(ch3mode,1) ;
 delay(2000);
 UART0_SendData(ch3modevalue,1) ;
 delay(2000);

 while (1) {
 UART0_SendData(read,1) ;
 delay(2000);
 }
}

读和写类似啊
发0xa0+寄存器地址，比如0xa7,
然后读串口接收值就可以了