建立工程，成功创建两个虚拟串口

2023-06-21 18:00:56 +08:00
commit 3604192d8f
872 changed files with 428764 additions and 0 deletions
--- a/source/OpenAMP/open-amp/apps/examples/echo/rpmsg-echo.c
+++ b/source/OpenAMP/open-amp/apps/examples/echo/rpmsg-echo.c
@@ -0,0 +1,115 @@
+/* This is a sample demonstration application that showcases usage of rpmsg
+This application is meant to run on the remote CPU running baremetal code.
+This application echoes back data that was sent to it by the master core. */
+
+#include <stdio.h>
+#include <openamp/open_amp.h>
+#include <metal/alloc.h>
+#include "platform_info.h"
+#include "rpmsg-echo.h"
+
+#define SHUTDOWN_MSG	0xEF56A55A
+
+#define LPRINTF(format, ...) printf(format, ##__VA_ARGS__)
+//#define LPRINTF(format, ...)
+#define LPERROR(format, ...) LPRINTF("ERROR: " format, ##__VA_ARGS__)
+
+static struct rpmsg_endpoint lept;
+static int shutdown_req = 0;
+
+/*-----------------------------------------------------------------------------*
+ *  RPMSG endpoint callbacks
+ *-----------------------------------------------------------------------------*/
+static int rpmsg_endpoint_cb(struct rpmsg_endpoint *ept, void *data, size_t len,
+			     uint32_t src, void *priv)
+{
+	(void)priv;
+	(void)src;
+
+	/* On reception of a shutdown we signal the application to terminate */
+	if ((*(unsigned int *)data) == SHUTDOWN_MSG) {
+		LPRINTF("shutdown message is received.\n");
+		shutdown_req = 1;
+		return RPMSG_SUCCESS;
+	}
+
+	/* Send data back to master */
+	if (rpmsg_send(ept, data, len) < 0) {
+		LPERROR("rpmsg_send failed\n");
+	}
+	return RPMSG_SUCCESS;
+}
+
+static void rpmsg_service_unbind(struct rpmsg_endpoint *ept)
+{
+	(void)ept;
+	LPRINTF("unexpected Remote endpoint destroy\n");
+	shutdown_req = 1;
+}
+
+/*-----------------------------------------------------------------------------*
+ *  Application
+ *-----------------------------------------------------------------------------*/
+int app(struct rpmsg_device *rdev, void *priv)
+{
+	int ret;
+
+	/* Initialize RPMSG framework */
+	LPRINTF("Try to create rpmsg endpoint.\n");
+
+	ret = rpmsg_create_ept(&lept, rdev, RPMSG_SERVICE_NAME,
+			       0, RPMSG_ADDR_ANY, rpmsg_endpoint_cb,
+			       rpmsg_service_unbind);
+	if (ret) {
+		LPERROR("Failed to create endpoint.\n");
+		return -1;
+	}
+
+	LPRINTF("Successfully created rpmsg endpoint.\n");
+	while(1) {
+		platform_poll(priv);
+		/* we got a shutdown request, exit */
+		if (shutdown_req) {
+			break;
+		}
+	}
+	rpmsg_destroy_ept(&lept);
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------------*
+ *  Application entry point
+ *-----------------------------------------------------------------------------*/
+int main(int argc, char *argv[])
+{
+	void *platform;
+	struct rpmsg_device *rpdev;
+	int ret;
+
+	LPRINTF("Starting application...\n");
+
+	/* Initialize platform */
+	ret = platform_init(argc, argv, &platform);
+	if (ret) {
+		LPERROR("Failed to initialize platform.\n");
+		ret = -1;
+	} else {
+		rpdev = platform_create_rpmsg_vdev(platform, 0,
+						   VIRTIO_DEV_SLAVE,
+						   NULL, NULL);
+		if (!rpdev) {
+			LPERROR("Failed to create rpmsg virtio device.\n");
+			ret = -1;
+		} else {
+			app(rpdev, platform);
+			platform_release_rpmsg_vdev(rpdev);
+			ret = 0;
+		}
+	}
+
+	LPRINTF("Stopping application...\n");
+	platform_cleanup(platform);
+
+	return ret;
+}