import RT-Thread@9217865c without bsp, libcpu and components/net

examples/ymodem/null.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+
+#include <ymodem.h>
+
+static enum rym_code _rym_dummy_write(
+        struct rym_ctx *ctx,
+        rt_uint8_t *buf,
+        rt_size_t len)
+{
+    return RYM_CODE_ACK;
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+rt_err_t rym_null(char *devname)
+{
+    struct rym_ctx rctx;
+    rt_device_t dev = rt_device_find(devname);
+    if (!dev)
+    {
+        rt_kprintf("could not find device %s\n", devname);
+        return -1;
+    }
+
+    return rym_recv_on_device(&rctx, dev, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                              RT_NULL, _rym_dummy_write, RT_NULL, 1000);
+}
+FINSH_FUNCTION_EXPORT(rym_null, dump data to null);
+#endif
+