Return to 62.5MHz; packet loss was the filter not the frequency.

Update Etherbone config space with correct IP address.

Return to 62.5MHz; packet loss was the filter not the frequency.
Update Etherbone config space with correct IP address.
6fc605be · Wesley W. Terpstra · 469df055 · 6fc605be · 6fc605be
Commit 6fc605be authored Jul 05, 2012 by Wesley W. Terpstra
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Showing with 12 additions and 1 deletion

board.h boards/arria/board.h +1 -1

bootp.c lib/bootp.c +11 -0

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--- a/boards/arria/board.h
+++ b/boards/arria/board.h
@@ -6,7 +6,7 @@
 /* Board-specific parameters */

 /* WR Core system/CPU clock frequency in Hz */
-#define CPU_CLOCK 125000000ULL
+#define CPU_CLOCK 62500000ULL

 /* WR Reference clock period (picoseconds) and frequency (Hz) */
 #define REF_CLOCK_PERIOD_PS 8000

--- a/lib/bootp.c
+++ b/lib/bootp.c
@@ -124,7 +124,10 @@ int send_bootp(uint8_t* buf, int retry) {

 int process_bootp(uint8_t* buf, int len) 
 {
+  volatile unsigned int *eb_ip = (unsigned int*)0x20718;
+  unsigned int ip;
  uint8_t mac[6];
+  
  get_mac_addr(mac);
  
  if (len != BOOTP_END) return 0;
@@ -139,5 +142,13 @@ int process_bootp(uint8_t* buf, int len)
  
  mprintf("Discovered IP address!\n");
  memcpy(myIP, buf+BOOTP_YIADDR, 4);
+  
+  ip = 
+    (buf[BOOTP_YIADDR+0] << 24) |
+    (buf[BOOTP_YIADDR+1] << 16) |
+    (buf[BOOTP_YIADDR+2] <<  8) |
+    (buf[BOOTP_YIADDR+3]);
+  while (*eb_ip != ip) *eb_ip = ip;
+  
  return 1;
 }