X-Git-Url: https://git.llucax.com/z.facultad/66.09/etherled.git/blobdiff_plain/cbf2122a2f610a2b92f1dfcb0f554b4bf7c4757e..8f48e4df85125bfd22f8c93b5952deccc9f6af72:/src/dp8390.c?ds=inline

diff --git a/src/dp8390.c b/src/dp8390.c
index 6392307..642c36f 100644
--- a/src/dp8390.c
+++ b/src/dp8390.c
@@ -1,21 +1,11 @@
 // vim: set et sw=4 sts=4 :	
 
+#include "debug.h"
 #include "eth.h"
 #include "dp8390.h"
 
-#ifdef DEBUG
-void sleep(unsigned char);
-#ifdef SDCC
-static xdata at 0x0080 byte leds0;
-static xdata at 0x00c0 byte leds1;
-#else
-static byte xdata leds0 _at_ 0x0080;
-static byte xdata leds1 _at_ 0x00c0;
-#endif
-#endif
-
 /// Datos persistentes del módulo
-static union
+static union // Unión porque nunca se usan ambos juntos
 {
     byte send_len; ///> Tamaño del frame que será enviado
     byte next_pkt; ///> Próximo frame a obtener
@@ -131,7 +121,7 @@ static void reset()
     SELECT_REG_PAGE(0);
 
     // Clear rx buffer overflow & packet received interrupt flags.
-    write_reg(ISR, PRX | OVW);
+    write_reg(ISR, OVW);
 
     // Re-itialise transmit configuration reg for normal operation.
     write_reg(TCR, MODE0);
@@ -274,7 +264,7 @@ void netdev_send_start()
     write_reg(RBCR1, 0u);
 
     // Initiate DMA transfer of uip_buf & uip_appdata buffers to RTL8019AS.
-    write_reg(CR, WRITE | STA);
+    write_reg(CR, WRITE);
 }
 
 /** Escribe un byte al buffer de la placa de red para ser enviado
@@ -327,7 +317,7 @@ void netdev_send_end()
  * @return Cantidad de bytes del frame leído
  */
 byte netdev_recv_start()
-{    
+{
     // Check if the rx buffer has overflowed.
     if (read_reg(ISR) & OVW)
     {
@@ -344,17 +334,9 @@ byte netdev_recv_start()
 
         if (read_reg(BNRY) == current)
         {
-#ifdef DEBUG
-            leds1 = ~0x01;
-            leds2 = ~read_reg(ISR);
-            sleep(5);
-            leds1 = ~0x02;
-            leds2 = ~read_reg(BNRY);
-            sleep(5);
-            leds1 = ~0x04;
-            leds2 = ~current;
-            sleep(5);
-#endif
+            printb(read_reg(ISR), 0x01);
+            printb(read_reg(BNRY), 0x02);
+            printb(current, 0x04);
             reset();
         }
         return 0u;
@@ -400,7 +382,7 @@ byte netdev_recv_start()
 
         // Set remote DMA byte count registers to packet header length.
         write_reg(RBCR0, sizeof(struct buf_hdr_t));
-        write_reg(RBCR1, 0u);
+        write_reg(RBCR1, 0x00);
 
         // Clear remote DMA complete interrupt status register bit.
         write_reg(ISR, RDC);
@@ -412,7 +394,11 @@ byte netdev_recv_start()
         buf_hdr.status = read_reg(RDMA);
 
         // Save next packet pointer.
-        buf_hdr.next = persistent.next_pkt = read_reg(RDMA);
+        buf_hdr.next = read_reg(RDMA);
+
+        // Indicamos cual es el próximo paquete para cuando termine
+        // FIXME poner más lindo para que consuma menos memoria
+        persistent.next_pkt = buf_hdr.next - 1;
 
         // Retrieve packet data length and subtract CRC bytes.
         buf_hdr.len = read_reg(RDMA) - sizeof(struct buf_hdr_t);
@@ -422,14 +408,15 @@ byte netdev_recv_start()
                 || ((buf_hdr.status & 0x0F) != RXSOK)
                 || read_reg(RDMA)) // Parte alta del tamaño
         {
-            ABORT_DMA(START); // Termina DMA
-            write_reg(BNRY, buf_hdr.next - 1); // Pasa al próximo frame
+            // Abort/ complete DMA operation.
+            ABORT_DMA(START);
+
+            // Advance boundary pointer to next packet start.
+            write_reg(BNRY, persistent.next_pkt);
+
             return 0;
         }
 
-        // Abort/ complete DMA operation.
-        ABORT_DMA(START);
-
         // Set remote DMA start address registers to packet data.
         write_reg(RSAR0, sizeof(struct buf_hdr_t));
         write_reg(RSAR1, bnry);
@@ -472,6 +459,6 @@ void netdev_recv_end()
     ABORT_DMA(START);
 
     // Advance boundary pointer to next packet start.
-    write_reg(BNRY, persistent.next_pkt - 1);
+    write_reg(BNRY, persistent.next_pkt);
 }