各位前輩大家好:

我是學習PIC的新手，目前所用晶片為PIC18F4620
並置於PICDEM Z這塊板子，主要使用於
CAN Bus與USART傳輸之設定
不過在編譯過程遭遇sprintf & sscanf之麻煩，
sprintf--->type qualifier mismatch in assignment
sscanf--->call of function without prototype
如此看來需要在額外定義此兩個指令或是?

希望各位前輩不吝嗇給予指教，謝謝!

unsigned char Key;
int i;
char data[50];

void PutrsUSART( const rom char *data );
void getsUSART ( char * buffer, unsigned char len );
void OpenPORTB ( unsigned char config);

//Checking busy or not
void USARTOut(char *data, char bytes){

for(i=0; i<bytes; i++){

while(BusyUSART());
WriteUSART(data[i]);
}
}
void Init_IO(void){

PORTA = 0; //PORTA initially all zeros
TRISA = 0xF8; //RA0 and RA1 outputs (LEDs)
TRISB = 0xFF; //PORTB all inputs (RB0 is interrupt, RB4 and RB5 are push buttons)

OpenUSART( USART_TX_INT_OFF // Set TXSTA Reg. =0b00100100
& USART_RX_INT_OFF // Set RCSTA Reg. =0b10010000
& USART_ASYNCH_MODE
& USART_EIGHT_BIT
& USART_CONT_RX
& USART_BRGH_HIGH,25 ); // Set SPBRG=103, Baud Rate = 9600
}

void initCAN(char *data, char bytes){

PutrsUSART("\r\r\r\r\r\r\r\r"); //clear CAN232 buffer
getsUSART(data,20);

PutrsUSART("C\r"); //close CAN channel
getsUSART(data,1);

PutrsUSART("X1\r"); //set auto poll
getsUSART(data,1);

PutrsUSART("s82EB\r"); //set CAN bit rate
getsUSART(data,1);

PutrsUSART("O\r"); //open CAN channel
getsUSART(data,1);

PutrsUSART("t010103\r"); //connect to videoray
getsUSART(data,2);
}

//SendCan function
int SendCAN(VideoRayCommandPacket c){

sprintf(data,"t010703%02x%02x%02x%02x%02x%02x\r",
c.StbdThruster,
c.PortThruster,
c.VertThruster,
c.Lights,
c.CtrlBits1,
c.CtrlBits2);

USARTOut(data,strlen(data));
}

//ReceiveCAN function
unsigned char DataType,HeadingLow,HeadingHigh,DepthLow,DepthHigh;

int ReceiveCAN(unsigned int *h,unsigned int *d){

int temp;

getsUSART(data,18);

sscanf(data,"t0186%2x%2x%2x%2x%2x",
&DataType,
&HeadingLow,
&HeadingHigh,
&DepthLow,
&DepthHigh);

USARTOut(data,strlen(data));
}
//********************************************************************//
//** Function to output an array of bytes to the USART (RS232 port) **//
//********************************************************************//
void main(void){

Init_IO();

while(initCAN == 0){

Command.VertThruster = 0;
Command.PortThruster = 0;
Command.StbdThruster = 0;
Command.Lights = 0;
Command.CtrlBits1 = 0;
Command.CtrlBits2 = 0;
}
while(1){

switch(Key){
case 'RB4': //up
if (RB4 == 1){
LED0 = 0x05; //RA0 LED ON
Delay10KTCYx(40);
Command.VertThruster = 100;
Command.CtrlBits2 = 0; //D6 = 0, Vertical up;
}else{
LED0 = 0x04; //RA0 LED OFF
}
break;

case 'RB5': //down
if (RB5 == 1){
LED1=0x06; //RA1 LED ON
Delay10KTCYx(40); // Waiting time instead of pressing button
Command.VertThruster = 100;
Command.CtrlBits2 = 0x40; //D6 = 1, Vertical down;
}else{
LED1=0x04; //RA1 LED OFF
}
break;
}
}
}
void PutrsUSART( const rom char *data ){
do{
while(!(TXSTA & 0x02));
TXREG = *data;
}while(*data++);
}

並於LED1=0x04; //RA1 LED OFF
此行出現重複定義之問題
但我想目的同LED0為何會有重複定義之問題呢?

謝謝，感激不盡!

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