引用: #include
#include "uart.h"
int fgetc(FILE *f)
{
/* Your implementation of fgetc(). */
int len=0;
uint8_t ch=0;
do
{
len = uart_read(&ch, 1);
}while(len == 0);
return ch;
}
int fputc(int c, FILE *stream)
{
/* Your implementation of fputc(). */
uint8_t ch=0;
if((uint8_t)ch == (uint8_t)'n')
{
ch = 'r';
uart_write(&ch,1);
}
ch = (uint8_t)c;
uart_write(&ch,1);
return c;
}
引用: int a;
int b;
printf("Hello Worldrn");
while(1)
{
printf("please input a and b:");
scanf("%d %d",&a,&b);
printf("%d+%d=%drn",a,b,a+b);
//int len=0;
//if((len = uart_read(buffer, sizeof(buffer))) >0)
//{
// uart_write(buffer, len);
//}
}
引用: #include "xprintf.h"
{
uint8_t c=ch;
uart_write(&c,1);
}
int xprintf_in(void)
{
int len=0;
uint8_t ch=0;
do
{
len = uart_read(&ch, 1);
}while(len == 0);
return ch;
}
引用: xdev_out(xprintf_out);
xdev_in(xprintf_in);
引用: #define XF_USE_OUTPUT 1 /* 1: Enable output functions */
#define XF_CRLF 1 /* 1: Convert n ==> rn in the output char */
#define XF_USE_DUMP 1 /* 1: Enable put_dump function */
#define XF_USE_LLI 1 /* 1: Enable long long integer in size prefix ll */
#define XF_USE_FP 1 /* 1: Enable support for floating point in type e and f */
#define XF_DPC '.' /* Decimal separator for floating point */
#define XF_USE_INPUT 1 /* 1: Enable input functions */
#define XF_INPUT_ECHO 1 /* 1: Echo back input chars in xgets function */
引用: xprintf("%dn", 1234); /* "1234" */
xprintf("%6d,%3d%%n", -200, 5); /* " -200, 5%" */
xprintf("%-6un", 100); /* "100 " */
xprintf("%ldn", 12345678); /* "12345678" */
xprintf("%llun", 0x100000000); /* "4294967296"*/
xprintf("%lldn", -1LL); /* "-1"*/
xprintf("%04xn", 0xA3); /* "00a3" */
xprintf("%08lXn", 0x123ABC); /* "00123ABC" */
xprintf("%016bn", 0x550F); /* "0101010100001111" */
xprintf("%*dn", 6, 100); /* " 100" */
xprintf("%sn", "abcdefg"); /* "abcdefg" */
xprintf("%5sn", "abc"); /* " abc" */
xprintf("%-5sn", "abc"); /* "abc " */
xprintf("%.5sn", "abcdefg"); /* "abcde" */
xprintf("%-5.2sn", "abcdefg"); /* "ab " */
xprintf("%cn", 'a'); /* "a" */
xprintf("%12fn", 10.0); /* " 10.000000"*/
xprintf("%.4En", 123.45678); /* "1.2346E+02"*/
引用: char buffer[64];
long a;
long b;
char* p;
while(1)
{
xprintf("please input a int:n");
xgets(buffer,sizeof(buffer));
p = buffer;
xatoi(&p,&a);
xprintf("please input a int:n");
xgets(buffer,sizeof(buffer));
p = buffer;
xatoi(&p,&b);
xprintf("%d+%d=%dn",a,b,a+b);
}
更多回帖
