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/*
* Copyright (c) 2016, Toradex AG
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of Freescale Semiconductor, Inc. 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 THE COPYRIGHT HOLDER OR 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 <errno.h>
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "string.h"
#include "assert.h"
#include "rpmsg/rpmsg.h"
#include "plat_porting.h"
#include <ccm_vf6xx.h>
#include "debug_console_vf6xx.h"
#include "pin_mux.h"
#include "rpmsg/rpmsg_rtos.h"
/*
* function decalaration for platform provided facility
*/
extern void platform_interrupt_enable(void);
extern void platform_interrupt_disable(void);
/*
* APP decided interrupt priority
*/
#define APP_MSCM_IRQ_PRIORITY 3
/* Globals */
static char app_buf[512]; /* Each RPMSG buffer can carry less than 512 payload */
/*!
* @brief A basic RPMSG task
*/
static void StrEchoTask(void *pvParameters)
{
int result;
struct remote_device *rdev = NULL;
struct rpmsg_channel *app_chnl = NULL;
void *rx_buf;
int len;
unsigned long src;
void *tx_buf;
unsigned long size;
/* Print the initial banner */
PRINTF("\r\nRPMSG String Echo FreeRTOS RTOS API Demo...\r\n");
/* RPMSG Init as REMOTE */
PRINTF("RPMSG Init as Remote\r\n");
result = rpmsg_rtos_init(0 /*REMOTE_CPU_ID*/, &rdev, RPMSG_MASTER, &app_chnl);
assert(result == 0);
PRINTF("Name service handshake is done, M4 has setup a rpmsg channel [%d ---> %d]\r\n", app_chnl->src, app_chnl->dst);
/*
* str_echo demo loop
*/
for (;;)
{
/* Get RPMsg rx buffer with message */
result = rpmsg_rtos_recv_nocopy(app_chnl->rp_ept, &rx_buf, &len, &src, 0xFFFFFFFF);
assert(result == 0);
/* Copy string from RPMsg rx buffer */
assert(len < sizeof(app_buf));
memcpy(app_buf, rx_buf, len);
app_buf[len] = 0; /* End string by '\0' */
if ((len == 2) && (app_buf[0] == 0xd) && (app_buf[1] == 0xa))
PRINTF("Get New Line From Master Side\r\n");
else
PRINTF("Get Message From Master Side : \"%s\" [len : %d]\r\n", app_buf, len);
/* Get tx buffer from RPMsg */
tx_buf = rpmsg_rtos_alloc_tx_buffer(app_chnl->rp_ept, &size);
assert(tx_buf);
/* Copy string to RPMsg tx buffer */
memcpy(tx_buf, app_buf, len);
/* Echo back received message with nocopy send */
result = rpmsg_rtos_send_nocopy(app_chnl->rp_ept, tx_buf, len, src);
assert(result == 0);
/* Release held RPMsg rx buffer */
result = rpmsg_rtos_recv_nocopy_free(app_chnl->rp_ept, rx_buf);
assert(result == 0);
}
}
int main(void)
{
/* Init Clock Control and UART */
CCM_GetClocks();
CCM_ControlGate(ccmCcgrGateUart2, ccmClockNeededAll);
configure_uart_pins(UART2);
vf6xx_DbgConsole_Init(UART2, ccmIpgBusClk, 115200);
printf("Starting RPMSG String Echo Demo...\r\n");
/*
* Prepare for the MSCM Interrupt
* MSCM must be initialized before rpmsg init is called
*/
platform_interrupt_enable();
NVIC_SetPriority(CPU2CPU_INT0_IRQ, APP_MSCM_IRQ_PRIORITY);
NVIC_SetPriority(CPU2CPU_INT1_IRQ, APP_MSCM_IRQ_PRIORITY);
// Create a demo task which will print Hello world and echo user's input.
xTaskCreate(StrEchoTask, "String Echo Task", configMINIMAL_STACK_SIZE,
NULL, tskIDLE_PRIORITY+1, NULL);
// Start FreeRTOS scheduler.
vTaskStartScheduler();
// Should never reach this point.
while (true);
}
/*******************************************************************************
* EOF
******************************************************************************/
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