有人有 Embedded C Programming and the Microchip PIC by Richard H. Barnett 吗??
我已经找到第一本了 ........

dear mechwu..I just find you are a university teacher......and the article I post is written by you ....what a lucky!!
I am a beginner of ccsc, but have interest to learn it well..maybe I will ask you some questions and firstly thank you for your enthusiam ,spirit of sharing and help.
may I ask you a question?
do you have the two ebooks below?If having ,can you tell me and pass them to me ?
1.PICmicro MCU C: An introduction to Programming the Microchip PIC in CCS C (Spiral-bound)
by Nigel Gardner
2. Embedded C Programming and the Microchip PIC by Richard H. Barnett
Thanks again

谢谢mechwu,我按着您的提示做,可以看到输出,但是输出全是乱码,我的com port, baud rate 设置为:com 1, 115200.请教怎么解决.谢谢.
乱码如下:
B<’a˜Â¼Ra¼Òa£”Y뉔үÒ¯v¼ÒR C
8$$<5$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$<$aB<$aB<aY//B<<<<<<
<<<<<<<<<<<<<B<R$/$//B B<Y/////////////
////////////////////////////////////////
//FB<+B<++R£/$//B<%B%BB<BYYYYYYYYYYYYYYY
YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
F<KN"B<KKR#/$///////////////////////////
/////////////////////////////+aKaB<KaY//
////////////////////////////////////////
//////////////FB<R$B<RR$5$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
F&"B<&B<&QG/////////////////////////////
//////////////////////////R<RB<$5$$FQ8/

參照：

PIC 的程式要先啟用 UART，才能使用 printf()

#use rs232( baud = 115200, xmit = PIN_C6, rcv = PIN_C7 )

然後，你必須要有一台終端機 ... 接線如下

PIC 的 UART 的 TX / RX 線 (通常是 RC6 與 RC7) 接到 RS232 準位轉換器 (通常用 MAX232 這顆 IC) ，將 PIC 的 0V / 5V 的 TTL/CMOS 信號轉換為 +/- 9V 的 RS232 信號，然後，將 MAX232 的線接到 PC 的 COM port (或 USB / RS232 轉換器)，然後， 啟動 PC 的終端機程式 (通常是 Hyperterminal, hypertrm.exe，或是 CCS 提供的 C:\Program Files\PICC\siow.exe) 然後，設定好 com port, baud rate 等參數，然後，就可以在 PC 的螢幕上看到輸出啦

先看看你的實驗板上有沒有 MAX232 這顆 IC 吧

如何讀取 16 位元的 TIMER1 的數值？有三種讀法，其中已上面那篇的習慣的寫法會百中錯一，很難發現，就算你用線上調試也一樣！

#include <16F877.H>

#use delay(clock = 20000000)
#use rs232( baud = 115200, xmit = PIN_C6, rcv = PIN_C7 )

#define TMR1 *(int16 *)(0x0E) // 定義 TMR1 為位於 0x0E 的 16 bit 變數
#define TMR1L *(int8 *)(0x0E) // 若寫成 *(0x0E) 的話，變成 8 bit !
#define TMR1H *(int8 *)(0x0F)

long Timer_1;
#byte Timer_1 = 0x0E
#byte Timer_1_L = 0x0E
#byte Timer_1_H = 0x0F

#bit A4 = 0x05.4
#bit TRISA4 = 0x85.4

#org 0x0800
void main()
{
int16 t_1, t_2, t_3; int8 i = 0;

setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_8 ); // 1.6 usec per count

TRISA4 = 0;

while(1)
{
A4 = 1; // 用示波器看 pin_RA4 的信號，要加提昇電阻！

t_1 = TMR1; // 這種寫法會有 隨機的 錯誤！ 小心喔！
t_2 = Timer_1;
t_3 = get_timer1();

A4 = 0;

if ( ((t_2-t_1)>3) || ((t_3-t_1)>3) || ((t_3-t_2)>3) ) // 抓到蟲啦
{
printf ( "i, t_1, t_2, t_3 = %3u 0x%04LX 0x%04LX 0x%04LX\r\n",
++i, t_1, t_2, t_3 );

t_1 = TMR1; // 這次絕對不會錯！
t_2 = Timer_1;
t_3 = get_timer1();

printf ( "i, t_1, t_2, t_3 = %3u 0x%04LX 0x%04LX 0x%04LX\r\n\n",
i, t_1, t_2, t_3 );
}
}
}

小弟的一點經驗，希望能讓 CCS 新手快樂向前行

祝 順心
~~~~~~~~~~~~~~~~~~~~~~~
以上是转贴,希望对关于timer1读写有帮助
我的问题是,我怎么能看到printf输出---- printf ( "i, t_1, t_2, t_3 = %3u 0x%04LX 0x%04LX 0x%04LX\r\n\n",
i, t_1, t_2, t_3 );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
我查阅了ccsc相关资料.......供参考



PRINTF( )
FPRINTF( )

--------------------------------------------------------------------------------



Syntax:
printf (string)

or

printf (cstring, values...)

or

printf (fname, cstring, values...)

fprintf (stream, cstring, values...)



Parameters:
String is a constant string or an array of characters null terminated. Values is a list of variables separated by commas, fname is a function name to be used for outputting (default is putc is none is specified). Stream is a stream identifier (a constant byte)



Returns:
undefined



Function:
Outputs a string of characters to either the standard RS-232 pins (first two forms) or to a specified function. Formatting is in accordance with the string argument. When variables are used this string must be a constant. The % character is used within the string to indicate a variable value is to be formatted and output. Longs in the printf may be 16 or 32 bit. A %% will output a single %. Formatting rules for the % follows.



If fprintf() is used then the specified stream is used where printf() defaults to STDOUT (the last USE RS232).



Format:

The format takes the generic form %nt. n is optional and may be 1-9 to specify how many characters are to be outputted, or 01-09 to indicate leading zeros, or 1.1 to 9.9 for floating point and %w output. t is the type and may be one of the following:

c
Character

s
String or character

u
Unsigned int

d
Signed int

Lu
Long unsigned int

Ld
Long signed int

x
Hex int (lower case)

X
Hex int (upper case)

Lx
Hex long int (lower case)

LX
Hex long int (upper case)

f
Float with truncated decimal

g
Float with rounded decimal

e
Float in exponential format

w
Unsigned int with decimal place inserted. Specify two numbers for n. The first is a total field width. The second is the desired number of decimal places.




Example formats:

Specifier
Value=0x12
Value=0xfe

%03u
018
254

%u
18
254

%2u
18
*

%5
18
254

%d
18
-2

%x
12
fe

%X
12
FE

%4X
0012
00FE

%3.1w
1.8
25.4


* Result is undefined - Assume garbage.



Availability:
All Devices



Requires:
#use rs232 (unless fname is used)



Examples:
byte x,y,z;

printf("HiThere");

printf("RTCCValue=>%2x\n\r",get_rtcc());

printf("%2u %X %4X\n\r",x,y,z);

printf(LCD_PUTC, "n=%u",n);

吳老師，

謝謝您的說明，感激不盡。

CCS 最令人感動的就是這些 功能強大，高彈性的 fprintf, sprintf 啦，

printf (), printf (cstring, values...)
printf (fname, cstring, values...)
fprintf (stream, cstring, values...)
sprintf(string, cstring, values...);

PIC12, PIC16, PIC18 都可以用，呵呵

還可以自行創造些 printf( lcd_putc, ... ) 之類的好東西，只要有 lcd_putc ( char c ) 就可以直接送去 LCD，把函數 lcd_putc 當成檔案來用！呵呵

-----------------

Syntax:
sprintf(string, cstring, values...);


Syntax:
printf (string)
or
printf (cstring, values...)
or
printf (fname, cstring, values...)
fprintf (stream, cstring, values...)

Syntax:
sprintf(string, cstring, values...);

Parameters:
string is an array of characters.

cstring is a constant string or an array of characters null terminated. Values are a list of variables separated by commas.

我不知道CCS是否有類似SPRINTF( ) 的函數可以print到 RAM 裏。 ㄧ般在這種微控制器的 printf( ) 大都指向 UART , 無法像 PC 示指向銀幕的。

我知道是在終端機,但是我是指输出到屏幕,我在哪个窗口可以看到?.......
谢谢你的回复!

1.通常是終端機。
2.CCS C看原廠附的手冊就夠了。