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 Post subject: sio_printf程式分享
PostPosted: Tue Mar 15, 2011 2:56 pm 
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Joined: Fri Mar 04, 2011 9:36 pm
Posts: 500
這個程式是一個uart輸出字串的範例,
printf()經過system call,而且它包含各種format轉換,使得程式很龐大。
所以我們改寫printf為sio_printf(),只有簡單的幾種輸出格式,
字串直接由UART的IO輸出。

下面的code中,主程式main()中,若系統尚未initial UART,
必須要執行uart_init();這一行。

Code:
#include <stdio.h>
#include "sio.h"

int main(void)
{
   int i;
   i = 0;
   
   //uart_init();
   while ( i < 1000 ) {
   sio_printf("%05d  hello! world!\n", i);
   i++;
   }
   return 0;
}


程式在這裡
Attachment:
sio_printf.zip [5.06 KiB]
Downloaded 727 times


注意:您的系統的Uart可能不同,
這個範例是參考用,
請依您的UART做修改。


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