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ipc_example.c
Go to the documentation of this file.
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/*
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* @brief Example implementation of IPC using IPC library
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2012
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#include "lpc43xx_dualcore_config.h"
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#include "
ipc_msg.h
"
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#include "
ipc_example.h
"
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#ifdef OS_FREE_RTOS
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#include "FreeRTOS.h"
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#include "task.h"
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#elif defined(OS_UCOS_III)
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#include "os.h"
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#endif
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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/* Array of IPC Event callback functions */
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static
void(*
ipcex_callback_lookup
[
IPCEX_MAX_IDS
]) (
uint32_t
);
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/* Message QUEUE used by IPC library to exchange message between cores */
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static
ipcex_msg_t
ipcex_queue
[
IPCEX_QUEUE_SZ
];
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/*****************************************************************************
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* Public types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Private functions
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****************************************************************************/
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/* This task will receive the message from the other core
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* and will invoke the appropriate callback with the message
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*/
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static
void
ipcex_dispatch_task
(
void
*loop)
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{
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int
ret;
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ipcex_msg_t
msg;
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do
{
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if
(loop) {
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ret =
IPC_popMsg
(&msg);
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}
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else
{
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ret =
IPC_tryPopMsg
(&msg);
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}
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if
((ret ==
QUEUE_VALID
) && (msg.
id
<
IPCEX_MAX_IDS
)) {
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if
(
ipcex_callback_lookup
[msg.
id
]) {
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ipcex_callback_lookup
[msg.
id
](msg.
data
);
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}
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}
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}
while
(loop);
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}
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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/* IPC register callback function pointer */
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int
ipcex_register_callback
(
uint32_t
id
,
void
(*func)(
uint32_t
))
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{
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if
(
id
>=
IPCEX_MAX_IDS
) {
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return
0;
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}
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ipcex_callback_lookup
[id] = func;
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return
1;
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}
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/* IPC example implementation task */
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void
ipcex_tasks
(
void
)
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{
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#ifdef OS_FREE_RTOS
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/* Start Blinky event Task */
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xTaskCreate(
ipcex_dispatch_task
, (
signed
char
*)
"IPC Ex"
,
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configMINIMAL_STACK_SIZE
, (
void
*) 1,
TASK_PRIO_IPC_DISPATCH
,
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(xTaskHandle *)
NULL
);
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#elif defined(OS_UCOS_III)
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OS_ERR ret;
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static
OS_TCB mem_tcb;
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static
CPU_STK mem_stack[
UCOS_MIN_STACK_SZ
];
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OSTaskCreate(
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&mem_tcb,
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"IPC Ex"
,
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ipcex_dispatch_task
,
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(
void
*) 1,
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TASK_PRIO_IPC_DISPATCH
,
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mem_stack,
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32,
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UCOS_MIN_STACK_SZ
,
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0,
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0,
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(
void
*) 0,
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(OS_OPT) (OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
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(OS_ERR *) &ret);
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if
(ret != OS_ERR_NONE) {
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DEBUGOUT
(
"Unable to create IPC ex task : ret = %x\r\n"
, ret);
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while
(1) {}
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}
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#else
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ipcex_dispatch_task
(0);
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#endif
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}
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/* Initialize the IPC queue */
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void
IPCEX_Init
(
void
)
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{
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IPC_initMsgQueue
(ipcex_queue,
sizeof
(
ipcex_msg_t
),
IPCEX_QUEUE_SZ
);
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}
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/* Push data on the queue */
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int
ipcex_msgPush
(
uint32_t
id
,
uint32_t
data)
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{
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ipcex_msg_t
msg;
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msg.
id
= id;
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msg.
data
= data;
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#if (defined(OS_FREE_RTOS) || defined(OS_UCOS_III))
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return
IPC_pushMsg
(&msg);
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#else
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return
IPC_tryPushMsg
(&msg);
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#endif
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}
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applications
lpc18xx_43xx
examples
43xx_dualcore
common
ipc_example.c
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