threads/threads.c

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Log
Revision 1.5 2005/11/22 09:17:31 haraldkipp Replaced specific device names by generalized macros. Thread stack size increased to get it running on ARM CPUs.

Revision 1.4 2005/04/05 18:00:29 haraldkipp Make it work on the Gameboy Advance.

Revision 1.3 2004/09/10 10:31:06 haraldkipp Use newer AVR UART device driver

Revision 1.2 2004/09/08 10:18:23 haraldkipp For EB40A

Revision 1.1 2003/08/05 18:59:05 haraldkipp Release 3.3 update

Revision 1.7 2003/02/04 18:19:40 harald Version 3 released

Revision 1.6 2003/02/04 16:24:36 harald Adapted to version 3

Revision 1.5 2002/06/26 17:29:06 harald First pre-release with 2.4 stack

Revision 1.4 2002/06/04 19:13:06 harald *** empty log message ***

Revision 1.3 2002/05/08 16:02:33 harald First Imagecraft compilation

Revision 1.2 2001/12/04 16:45:40 harald Stack space increased

Revision 1.1 2001/06/28 18:43:13 harald Preview release

This sample demonstrates Nut/OS multithreading.

Each thread is started with 192 bytes of stack. This is very low and doesn't provide much space for local variables.

00001 
00083 #include <stdio.h>
00084 #include <io.h>
00085 
00086 #include <cfg/arch.h>
00087 #include <dev/board.h>
00088 
00089 #include <sys/thread.h>
00090 #include <sys/timer.h>
00091 
00092 /*
00093  * High priority thread.
00094  */
00095 THREAD(Thread1, arg)
00096 {
00097     /*
00098      * Endless loop in high priority thread.
00099      */
00100     NutThreadSetPriority(16);
00101     for (;;) {
00102         putchar('H');
00103         NutSleep(125);
00104     }
00105 }
00106 
00107 /*
00108  * Low priority thread.
00109  */
00110 THREAD(Thread2, arg)
00111 {
00112     /*
00113      * Endless loop in low priority thread.
00114      */
00115     NutThreadSetPriority(128);
00116     for (;;) {
00117         putchar('L');
00118         NutSleep(125);
00119     }
00120 }
00121 
00122 /*
00123  * Main application thread. 
00124  */
00125 int main(void)
00126 {
00127     u_long baud = 115200;
00128 
00129     /*
00130      * Register the UART device, open it, assign stdout to it and set 
00131      * the baudrate.
00132      */
00133     NutRegisterDevice(&DEV_UART, 0, 0);
00134     freopen(DEV_UART_NAME, "w", stdout);
00135     _ioctl(_fileno(stdout), UART_SETSPEED, &baud);
00136 
00137     puts("\nThread Test");
00138 
00139     /*
00140      * Start two additional threads. All threads are started with 
00141      * priority 64.
00142      */
00143     NutThreadCreate("t1", Thread1, 0, 512);
00144     NutThreadCreate("t2", Thread2, 0, 512);
00145 
00146     /*
00147      * Endless loop in main thread.
00148      */
00149     for (;;) {
00150         putchar('M');
00151         NutSleep(125);
00152     }
00153 }

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