1 files changed, 146 insertions, 0 deletions
diff --git a/examples/imx7d_sdb_m4/demo_apps/rpmsg/str_echo_freertos/str_echo_freertos.c b/examples/imx7d_sdb_m4/demo_apps/rpmsg/str_echo_freertos/str_echo_freertos.c
new file mode 100644
index 0000000..b34b3d7
--- /dev/null
+++ b/examples/imx7d_sdb_m4/demo_apps/rpmsg/str_echo_freertos/str_echo_freertos.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * 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 "rpmsg/rpmsg_rtos.h"
+#include "FreeRTOS.h"
+#include "task.h"
+#include "semphr.h"
+#include "string.h"
+#include "board.h"
+#include "mu_imx.h"
+#include "debug_console_imx.h"
+
+////////////////////////////////////////////////////////////////////////////////
+// Definitions
+////////////////////////////////////////////////////////////////////////////////
+#define APP_TASK_STACK_SIZE 256
+
+/*
+ * APP decided interrupt priority
+ */
+#define APP_MU_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);
+    }
+}
+
+/*
+ * MU Interrrupt ISR
+ */
+void BOARD_MU_HANDLER(void)
+{
+    /*
+     * calls into rpmsg_handler provided by middleware
+     */
+    rpmsg_handler();
+}
+
+int main(void)
+{
+    hardware_init();
+
+    /*
+     * Prepare for the MU Interrupt
+     *  MU must be initialized before rpmsg init is called
+     */
+    MU_Init(BOARD_MU_BASE_ADDR);
+    NVIC_SetPriority(BOARD_MU_IRQ_NUM, APP_MU_IRQ_PRIORITY);
+    NVIC_EnableIRQ(BOARD_MU_IRQ_NUM);
+
+    /* Create a demo task. */
+    xTaskCreate(StrEchoTask, "String Echo Task", APP_TASK_STACK_SIZE,
+                NULL, tskIDLE_PRIORITY+1, NULL);
+
+    /* Start FreeRTOS scheduler. */
+    vTaskStartScheduler();
+
+    /* Should never reach this point. */
+    while (true);
+}
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/