Fixed a typographical mistake, added serial_drain()

serial_drain() waits until all data written to the port is transmitted.

lpc.c

@@ -69,7 +69,7 @@ void lpc_init(struct lpc_device *dev) {
   char buf[4096];
   
   lpc_printf(dev, "?");
-  fflush(dev->port->f);
+  serial_drain(dev->port);
   
   if(lpc_await_reply(dev, "Synchronized", NULL)==1) {
       sprog_info("Synchronization successful\n");
@@ -81,7 +81,7 @@ void lpc_init(struct lpc_device *dev) {
       sprog_error("Expected OK, received '%s'\n", buf);
   } else {
     lpc_printf(dev, "\r\n");
-    if(lpc_await_reply(dev, "OK", NULL)==1)
+    if(lpc_await_reply(dev, "?", NULL)==1)
       sprog_info("The device appears to be already synchronized\n");
     else
       sprog_error("Invalid device response\n");
@@ -102,7 +102,7 @@ void lpc_write(struct lpc_device *dev, const struct sprog_data *d) {
   
   chunk.data = NULL;
   
-  i = 7; /* dev->part->flash/4; /* number of sectors = Flash size / 4kB */
+  i = dev->part->flash/4; /* number of sectors = Flash size / 4kB */
   lpc_command(dev, "P 0 %d\r\n", i);
   
   sprog_info("Erasing Flash memory... ");
@@ -119,10 +119,10 @@ void lpc_write(struct lpc_device *dev, const struct sprog_data *d) {
     for(i=0; chunk_sizes[i]; i++) {
       if(chunk_sizes[i]>=chunk_size)
 	break;
-      /*if(chunk_sizes[i]+1024 > dev->part->ram) {
+      if(chunk_sizes[i]+1024 > dev->part->ram) {
 	i--;
 	break;
-      }*/
+      }
     }
     
     chunk_size = chunk_sizes[i];

serial.c

@@ -176,3 +176,7 @@ int serial_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds
  
   return res;
 }
+
+void serial_drain(struct serial_device *port) {
+  tcdrain(port->fd);
+}

serial.h

@@ -32,5 +32,6 @@ int serial_setbaud(struct serial_device *port, int baud);
 void serial_setline(struct serial_device *port, int line, int state);
 int serial_read(struct serial_device *port, char *buf, int len, int timeout);
 void serial_write(struct serial_device *port, const char *text);
+void serial_drain(struct serial_device *port);
 
 #endif