CMSIS Example - Mail and Message

 /*----------------------------------------------------------------------------
  *      RL-ARM - RTX
  *----------------------------------------------------------------------------
  *      Name:    MAIL.C
  *      Purpose: RTX example program
  *----------------------------------------------------------------------------
  *
  * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
  * All rights reserved.
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *  - Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  - Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *  - Neither the name of ARM  nor the names of its contributors may be used
  *    to endorse or promote products derived from this software without
  *    specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *---------------------------------------------------------------------------*/

 #include <stdio.h>
 #include "cmsis_os.h"

 /* Thread IDs */
 osThreadId tid_thread1;               /* assigned ID for thread 1            */
 osThreadId tid_thread2;               /* assigned ID for thread 2            */

 typedef struct {                      /* Mail object structure               */
   float    voltage;                   /* AD result of measured voltage       */
   float    current;                   /* AD result of measured current       */
   uint32_t counter;                   /* A counter value                     */
 } T_MEAS;

 osMailQDef(mail, , T_MEAS);         /* Define mail queue                   */
 osMailQId  mail;

 /* Forward reference */
 void send_thread (void const *argument);
 void recv_thread (void const *argument);

 /* Thread definitions */
 osThreadDef(send_thread, osPriorityNormal, , );
 osThreadDef(recv_thread, osPriorityNormal, , );

 /*----------------------------------------------------------------------------
  *  Thread 1: Send thread
  *---------------------------------------------------------------------------*/
 void send_thread (void const *argument) {
   T_MEAS *mptr;

   mptr = osMailAlloc(mail, osWaitForever);           /* Allocate memory      */
   mptr->voltage = 223.72;             /* Set the mail content                */
   mptr->current = 17.54;
   mptr->counter = ;
   osMailPut(mail, mptr);              /* Send Mail                           */
   osDelay();

   mptr = osMailAlloc(mail, osWaitForever);           /* Allocate memory      */
   mptr->voltage = 227.23;             /* Prepare 2nd mail                    */
   mptr->current = 12.41;
   mptr->counter = ;
   osMailPut(mail, mptr);              /* Send Mail                           */
   osThreadYield();                    /* Cooperative multitasking            */
   osDelay();

   mptr = osMailAlloc(mail, osWaitForever);           /* Allocate memory      */
   mptr->voltage = 229.44;             /* Prepare 3rd mail                    */
   mptr->current = 11.89;
   mptr->counter = ;
   osMailPut(mail, mptr);              /* Send Mail                           */
   osDelay();
                                       /* We are done here, exit this thread  */
 }

 /*----------------------------------------------------------------------------
  *  Thread 2: Receive thread
  *---------------------------------------------------------------------------*/
 void recv_thread (void const *argument) {
   T_MEAS  *rptr;
   osEvent  evt;

   for (;;) {
     evt = osMailGet(mail, osWaitForever);  /* wait for mail                  */
     if (evt.status == osEventMail) {
       rptr = evt.value.p;
       printf ("\nVoltage: %.2f V\n",rptr->voltage);
       printf ("Current: %.2f A\n",rptr->current);
       printf ("Number of cycles: %d\n",(int)rptr->counter);
       #ifdef __USE_FFLUSH
       fflush (stdout);
       #endif
       osMailFree(mail, rptr);         /* free memory allocated for mail      */
     }
   }
 }

 /*----------------------------------------------------------------------------
  *   Main:
  *---------------------------------------------------------------------------*/
 int main (void) {                     /* program execution starts here       */

   mail = osMailCreate(osMailQ(mail), NULL);  /* create mail queue            */

   tid_thread1 = osThreadCreate(osThread(send_thread), NULL);
   tid_thread2 = osThreadCreate(osThread(recv_thread), NULL);

   osDelay(osWaitForever);
   for (;;);
 }

 /*----------------------------------------------------------------------------
  * end of file
  *---------------------------------------------------------------------------*/

 /*----------------------------------------------------------------------------
  *      RL-ARM - RTX
  *----------------------------------------------------------------------------
  *      Name:    MESSAGE.C
  *      Purpose: RTX example program
  *----------------------------------------------------------------------------
  *
  * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
  * All rights reserved.
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *  - Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  - Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *  - Neither the name of ARM  nor the names of its contributors may be used
  *    to endorse or promote products derived from this software without
  *    specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *---------------------------------------------------------------------------*/

 #include <stdio.h>
 #include "cmsis_os.h"

 /* Thread IDs */
 osThreadId tid_thread1;               /* assigned ID for thread 1            */
 osThreadId tid_thread2;               /* assigned ID for thread 2            */

 typedef struct {                      /* Message object structure            */
   float    voltage;                   /* AD result of measured voltage       */
   float    current;                   /* AD result of measured current       */
   uint32_t counter;                   /* A counter value                     */
 } T_MEAS;

 osPoolDef(mpool, , T_MEAS);             /* Define memory pool              */
 osPoolId  mpool;
 osMessageQDef(MsgBox, , T_MEAS);        /* Define message queue            */
 osMessageQId  MsgBox;

 /* Forward reference */
 void send_thread (void const *argument);
 void recv_thread (void const *argument);

 /* Thread definitions */
 osThreadDef(send_thread, osPriorityNormal, , );
 osThreadDef(recv_thread, osPriorityNormal, , );

 /*----------------------------------------------------------------------------
  *  Thread 1: Send thread
  *---------------------------------------------------------------------------*/
 void send_thread (void const *argument) {
   T_MEAS    *mptr;

   mptr = osPoolAlloc(mpool);          /* Allocate memory for the message     */
   mptr->voltage = 223.72;             /* Set the message content             */
   mptr->current = 17.54;
   mptr->counter = ;
   osMessagePut(MsgBox, (uint32_t)mptr, osWaitForever);  /* Send Message      */
   osDelay();

   mptr = osPoolAlloc(mpool);          /* Allocate memory for the message     */
   mptr->voltage = 227.23;             /* Prepare a 2nd message               */
   mptr->current = 12.41;
   mptr->counter = ;
   osMessagePut(MsgBox, (uint32_t)mptr, osWaitForever);  /* Send Message      */
   osThreadYield();                    /* Cooperative multitasking            */
   osDelay();

   mptr = osPoolAlloc(mpool);          /* Allocate memory for the message     */
   mptr->voltage = 229.44;             /* Prepare a 3rd message               */
   mptr->current = 11.89;
   mptr->counter = ;
   osMessagePut(MsgBox, (uint32_t)mptr, osWaitForever);  /* Send Message      */
   osDelay();
                                       /* We are done here, exit this thread  */
 }

 /*----------------------------------------------------------------------------
  *  Thread 2: Receive thread
  *---------------------------------------------------------------------------*/
 void recv_thread (void const *argument) {
   T_MEAS  *rptr;
   osEvent  evt;

   for (;;) {
     evt = osMessageGet(MsgBox, osWaitForever);  /* wait for message          */
     if (evt.status == osEventMessage) {
       rptr = evt.value.p;
       printf ("\nVoltage: %.2f V\n",rptr->voltage);
       printf ("Current: %.2f A\n",rptr->current);
       printf ("Number of cycles: %d\n",(int)rptr->counter);
       #ifdef __USE_FFLUSH
       fflush (stdout);
       #endif
       osPoolFree(mpool,rptr);         /* free memory allocated for message   */
     }
   }
 }

 /*----------------------------------------------------------------------------
  *   Main:
  *---------------------------------------------------------------------------*/
 int main (void) {                     /* program execution starts here       */

   mpool = osPoolCreate(osPool(mpool));  /* create memory pool                */
   MsgBox = osMessageCreate(osMessageQ(MsgBox), NULL);  /* create msg queue   */

   tid_thread1 = osThreadCreate(osThread(send_thread), NULL);
   tid_thread2 = osThreadCreate(osThread(recv_thread), NULL);

   osDelay(osWaitForever);
   for (;;);
 }

 /*----------------------------------------------------------------------------
  * end of file
  *---------------------------------------------------------------------------*/