int main()
{
SystemInit();
SystemCoreClockUpdate();
GPIO_PinDirection(P2_0,OUTPUT);
GPIO_PinDirection(P2_1,OUTPUT);
GPIO_PinDirection(P2_2,OUTPUT);
GPIO_PinDirection(P2_3,OUTPUT);
GPIO_PinWrite(P2_0,1);
UsbSerial_Init(9600);
GPIO_PinWrite(P2_1,1);
while(1)
{
UsbSerial_TxString(" Welcome to ARM Serial Programming by ExploreEmbedded\n\r");
}
}
void UsbSerial_Printf(const char *argList, ...)
{
const char *ptr;
double v_floatNum_f32;
va_list argp;
sint16_t v_num_s16;
sint32_t v_num_s32;
uint16_t v_num_u16;
uint32_t v_num_u32;
char *str;
char ch;
uint8_t v_numOfDigitsToTransmit_u8;
va_start(argp, argList);
/* Loop through the list to extract all the input arguments */
for(ptr = argList; *ptr != '\0'; ptr++)
{
ch= *ptr;
if(ch == '%') /*Check for '%' as there will be format specifier after it */
{
ptr++;
ch = *ptr;
if((ch>=0x30) && (ch<=0x39))
{
v_numOfDigitsToTransmit_u8 = 0;
while((ch>=0x30) && (ch<=0x39))
{
v_numOfDigitsToTransmit_u8 = (v_numOfDigitsToTransmit_u8 * 10) + (ch-0x30);
ptr++;
ch = *ptr;
}
}
else
{
v_numOfDigitsToTransmit_u8 = C_MaxDigitsToTransmitUsingPrintf_U8;
}
switch(ch) /* Decode the type of the argument */
{
case 'C':
case 'c': /* Argument type is of char, hence read char data from the argp */
ch = va_arg(argp, int);
UsbSerial_TxChar(ch);
break;
case 'd': /* Argument type is of signed integer, hence read 16bit data from the argp */
v_num_s16 = va_arg(argp, int);
#if (Enable_UsbSerial_TxNumber == 1)
if(v_num_s16<0)
{ /* If the number is -ve then display the 2's complement along with '-' sign */
v_num_s16 = -v_num_s16;
UsbSerial_TxChar('-');
}
UsbSerial_TxNumber(C_DECIMAL_U8,v_num_s16,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'D': /* Argument type is of integer, hence read 16bit data from the argp */
v_num_s32 = va_arg(argp, sint32_t);
#if (Enable_UsbSerial_TxNumber == 1)
if(v_num_s32<0)
{ /* If the number is -ve then display the 2's complement along with '-' sign */
v_num_s32 = -v_num_s32;
UsbSerial_TxChar('-');
}
UsbSerial_TxNumber(C_DECIMAL_U8,v_num_s32,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'u': /* Argument type is of unsigned integer, hence read 16bit unsigned data */
v_num_u16 = va_arg(argp, int);
#if (Enable_UsbSerial_TxNumber == 1)
UsbSerial_TxNumber(C_DECIMAL_U8,v_num_u16,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'U': /* Argument type is of integer, hence read 32bit unsigend data */
v_num_u32 = va_arg(argp, uint32_t);
#if (Enable_UsbSerial_TxNumber == 1)
UsbSerial_TxNumber(C_DECIMAL_U8,v_num_u32,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'x': /* Argument type is of hex, hence hexadecimal data from the argp */
v_num_u16 = va_arg(argp, int);
#if (Enable_UsbSerial_TxNumber == 1)
UsbSerial_TxNumber(C_HEX_U8, v_num_u16,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'X': /* Argument type is of hex, hence hexadecimal data from the argp */
v_num_u32 = va_arg(argp, uint32_t);
#if (Enable_UsbSerial_TxNumber == 1)
UsbSerial_TxNumber(C_HEX_U8, v_num_u32,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'b': /* Argument type is of binary,Read int and convert to binary */
v_num_u16 = va_arg(argp, int);
#if (Enable_UsbSerial_TxNumber == 1)
if(v_numOfDigitsToTransmit_u8 == C_MaxDigitsToTransmitUsingPrintf_U8)
{
v_numOfDigitsToTransmit_u8 = 16;
}
UsbSerial_TxNumber(C_BINARY_U8, v_num_u16,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'B': /* Argument type is of binary,Read int and convert to binary */
v_num_u32 = va_arg(argp, uint32_t);
#if (Enable_UsbSerial_TxNumber == 1)
if(v_numOfDigitsToTransmit_u8 == C_MaxDigitsToTransmitUsingPrintf_U8)
v_numOfDigitsToTransmit_u8 = 16;
UsbSerial_TxNumber(C_BINARY_U8, v_num_u32,v_numOfDigitsToTransmit_u8);
#endif
break;
case 'F':
case 'f': /* Argument type is of float, hence read double data from the argp */
v_floatNum_f32 = va_arg(argp, double);
#if (Enable_UsbSerial_TxFloatNumber == 1)
UsbSerial_TxFloatNumber(v_floatNum_f32);
#endif
break;
case 'S':
case 's': /* Argument type is of string, hence get the pointer to sting passed */
str = va_arg(argp, char *);
UsbSerial_TxString(str);
break;
case '%':
UsbSerial_TxChar('%');
break;
}
}
else
{
