3d9d6198c8
How To Run:
see TencentOS-tiny\board\ALPHA_I.MX_emmc_256ddr\README.md
TODO Next:
1. VFP support
2. fault diagnosis support
3. qemu vexpress ca9 support
4. raspberry pi support
5. SMP support
61 lines
993 B
C
61 lines
993 B
C
#include "vsprintf.h"
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#include "string.h"
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#include "printf.h"
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#include "bsp_uart.h"
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extern void uart_putc(unsigned char c);
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extern unsigned char uart_getc(void);
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#define OUTBUFSIZE 1024
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#define INBUFSIZE 1024
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static char g_pcOutBuf[OUTBUFSIZE];
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static char g_pcInBuf[INBUFSIZE];
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int printf(const char *fmt, ...)
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{
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int i;
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int len;
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va_list args;
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va_start(args, fmt);
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len = vsprintf(g_pcOutBuf,fmt,args);
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va_end(args);
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for (i = 0; i < strlen(g_pcOutBuf); i++)
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{
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uart_putc(g_pcOutBuf[i]);
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}
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return len;
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}
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int scanf(const char * fmt, ...)
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{
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int i = 0;
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unsigned char c;
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va_list args;
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while(1)
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{
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c = uart_getc();
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uart_putc(c);
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if((c == 0x0d) || (c == 0x0a))
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{
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g_pcInBuf[i] = '\0';
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break;
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}
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else
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{
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g_pcInBuf[i++] = c;
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}
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}
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va_start(args,fmt);
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i = vsscanf(g_pcInBuf,fmt,args);
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va_end(args);
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return i;
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}
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