First tests on function RPC

Please restructure the callback code (that right now is pure shit)

Author: facchinm

cores/arduino/RPC.cpp

@@ -2,6 +2,8 @@
 
 #include "RPC.h"
 
+extern int signal_rpc_available(void *data, size_t len);
+
 int RPC::rpmsg_recv_service_callback(struct rpmsg_endpoint *ept, void *data,
                                        size_t len, uint32_t src, void *priv)
 {
@@ -10,6 +12,9 @@ int RPC::rpmsg_recv_service_callback(struct rpmsg_endpoint *ept, void *data,
   if (s->code == REQUEST_REBOOT) {
     NVIC_SystemReset();
   }
+  if (s->code == CALL_FUNCTION) {
+    signal_rpc_available(s->data, len - sizeof(s->code));
+  }
   return 0;
 }
 
@@ -77,7 +82,12 @@ size_t RPC::write(uint8_t c) {
 }
 
 int RPC::request(service_request* s) {
-  return OPENAMP_send(&rp_endpoints[0], s, sizeof(*s) + s->length);
+  return OPENAMP_send(&rp_endpoints[0], s, sizeof(*s));
+}
+
+size_t RPC::write(enum endpoints_t ep, const uint8_t* buf, size_t len) {
+  OPENAMP_send(&rp_endpoints[ep], buf, len);
+  return len;
 }
 
 arduino::RPC RPC1;

cores/arduino/RPC.h

@@ -10,18 +10,23 @@ extern "C" {
 #define boolean   boolean_t
 #include "openamp.h"
 #undef boolean
+#ifdef bool
 #define boolean   bool
+#endif
 }
 
+enum endpoints_t {
+	ENDPOINT_SERVICE = 0,
+	ENDPOINT_RAW
+};
+
 enum service_request_code_t {
   REQUEST_REBOOT = 0x7F7F7F7F,
   CALL_FUNCTION  = 0x12345678,
 };
 
 typedef struct _service_request {
   enum service_request_code_t code;
-  size_t length;
-  size_t parameters;
   uint8_t* data;
 } service_request;
 
@@ -45,6 +50,8 @@ class RPC : public Stream {
 		size_t write(uint8_t c);
 		size_t write(const uint8_t*, size_t);
 		int request(service_request* s);
+		size_t write(enum endpoints_t ep, const uint8_t* buf, size_t len);
+
 		using Print::write; // pull in write(str) and write(buf, size) from Print
 		operator bool() {
 			return initialized;
@@ -68,4 +75,4 @@ extern arduino::RPC RPC1;
 
 #endif
 #endif
-#endif
+#endif