weird bug where theres a 100us delay between the transmission of the 3rd and 4th byte of every packet from the pi. this causes the RTS line to sag. must look into

compile_commands.json

@@ -17,62 +17,5 @@
         ],
         "directory": "/storage/Shared/Projects/Penguinator/pi_serial_bus_manager",
         "file": "src/p_serial_bus.cpp"
-    },
-    {
-        "arguments": [
-            "g++",
-            "-c",
-            "-Og",
-            "-Wall",
-            "-fdata-sections",
-            "-ffunction-sections",
-            "-g3",
-            "-DDEBUG",
-            "-Icfg",
-            "-Iinc",
-            "-o",
-            "build/p_serial_packet.o",
-            "src/p_serial_packet.cpp"
-        ],
-        "directory": "/storage/Shared/Projects/Penguinator/pi_serial_bus_manager",
-        "file": "src/p_serial_packet.cpp"
-    },
-    {
-        "arguments": [
-            "g++",
-            "-c",
-            "-Og",
-            "-Wall",
-            "-fdata-sections",
-            "-ffunction-sections",
-            "-g3",
-            "-DDEBUG",
-            "-Icfg",
-            "-Iinc",
-            "-o",
-            "build/main.o",
-            "src/main.cpp"
-        ],
-        "directory": "/storage/Shared/Projects/Penguinator/pi_serial_bus_manager",
-        "file": "src/main.cpp"
-    },
-    {
-        "arguments": [
-            "g++",
-            "-c",
-            "-Og",
-            "-Wall",
-            "-fdata-sections",
-            "-ffunction-sections",
-            "-g3",
-            "-DDEBUG",
-            "-Icfg",
-            "-Iinc",
-            "-o",
-            "build/p_idp.o",
-            "src/p_idp.cpp"
-        ],
-        "directory": "/storage/Shared/Projects/Penguinator/pi_serial_bus_manager",
-        "file": "src/p_idp.cpp"
     }
 ]

inc/p_serial_packet.h

@@ -34,7 +34,7 @@ public:
 	static ps_packet from_xy(int x, int y);
 	static ps_packet test_packet();
 #ifdef DEBUG
-	void show_packet();
+	void show_packet() const;
 #endif
 
 private:

src/p_serial_bus.cpp

@@ -44,11 +44,6 @@ ps_bus::ps_bus(const char* dev)
 	/* Set this flag if you want to receive data even while sending data */
 	// rs485conf.flags |= SER_RS485_RX_DURING_TX;
 
-	if (ioctl(dev_fd, TIOCSRS485, &rs485conf) < 0)
-	{
-		printf("ERROR\n");
-		/* Error handling. See errno. */
-	}
 	memset(&toptions, 0, sizeof(toptions));
 	tcgetattr(dev_fd, &toptions);
 	toptions.c_cflag &= ~(CSIZE | PARENB);
@@ -69,6 +64,11 @@ ps_bus::ps_bus(const char* dev)
 	tcflush(dev_fd, TCIFLUSH);
 	// apply
 	tcsetattr(dev_fd, TCSANOW, &toptions);
+	if (ioctl(dev_fd, TIOCSRS485, &rs485conf) < 0)
+	{
+		printf("ERROR\n");
+		/* Error handling. See errno. */
+	}
 }
 
 ps_bus::~ps_bus()
@@ -83,10 +83,13 @@ ps_bus::~ps_bus()
 bool ps_bus::send_pkt(const ps_packet* const pkt)
 {
 	bool ret = true;
+	pkt->show_packet();
 	if (write(dev_fd, pkt->data, pkt->msg_len) != pkt->msg_len)
 	{
 		ret = false;
 	}
+	tcflush(dev_fd, TCIFLUSH);
+	usleep(1000);
 	return ret;
 }
 bool ps_bus::recv_pkt(ps_packet* const pkt)

src/p_serial_packet.cpp

@@ -144,7 +144,7 @@ ps_packet ps_packet::test_packet()
 }
 
 #ifdef DEBUG
-void ps_packet::show_packet()
+void ps_packet::show_packet() const
 {
 	printf("Start Byte:\t\t0x%02x\n", data[0]);
 	printf("Source Address:\t\t0x%02x\n", *src_addr);