Diff: main.cpp

Revision:

2:28ddb9b073ec

Parent:

1:2944c0d494ff

--- a/main.cpp	Thu Oct 11 15:25:58 2018 +0000
+++ b/main.cpp	Thu Oct 11 20:45:38 2018 +0000
@@ -1,8 +1,8 @@
 /*
 ** Super lightweight, not at all robust, TFTP server for FRDM-K64F eval board.
-** This tool supports read-only access to one file. It does not support NACK responses
-** or timeouts. The tool is intended for use by our test department to check out Ethernet
-** functionality on our main processor board.
+** This tool supports read-only access to a couple of files. It does not support
+** NACK responses or timeouts. The tool is intended for use by our test department
+** to check out Ethernet functionality on our main processor board.
 **
 ** 11 October 2018
 ** - am
@@ -73,11 +73,12 @@
 
 int main (void) {
 
+    // Ethernet infrastructure
     EthernetInterface eth;
     UDPSocket tftp_server;
     Endpoint client;
 
-    // create data packet storage    
+    // data packet storage    
     tftp_packet_t packet;
     char *packet_ptr = (char *)&packet;
 
@@ -98,12 +99,12 @@
         led_waiting = LED_ON;
         tftp_server.bind(TFTP_PORT);
         tftp_server.receiveFrom(client, packet_ptr, sizeof(packet));
+        led_waiting = LED_OFF;
 
         // if it's a read request
         if (ntohs(packet.opcode) == RRQ) {
             // and it's for the environment file
             if (!strncmp(packet.request.filename_and_mode, "/production/u-boot-env_txt", 26)) {
-                led_waiting = LED_OFF;
                 // send file
                 int i_block = 1;
                 int i_string = 0;
@@ -129,11 +130,40 @@
                     led_error = LED_OFF;
                 };
             }
-            // error, we only support the u-boot-env.txt file
-            else tftp_send_error(tftp_server, client, 0, "this test board only supports reading the u-boot-env.txt file");
+            // or the binary test file
+            else if (!strncmp(packet.request.filename_and_mode, "/production/ethtest_bin", 23)) {
+                // send a 4M byte file (8192 512-byte blocks)
+                for (int block = 1; block < 8194; block++) { // blocks 1-8192 are full, block 8193 is empty (end of file)
+                    led_connected = LED_ON;
+                    packet.opcode = htons(DATA);
+                    packet.data.block_number = htons(block);
+                    // fill packet with Gray code
+                    for (uint16_t w=0; w<256; w++) {
+                        packet.data.data[w] = (char)((w>>1)^w);
+                        packet.data.data[256+w] = ~packet.data.data[w];
+                    }
+                    tftp_server.sendTo(client, packet_ptr, (block<8193) ? 516 : 4); // 4 = sizeof(opcode + block_number)
+                    led_connected = LED_OFF;
+                    led_error = LED_ON;
+                    tftp_server.receiveFrom(client, packet_ptr, sizeof(packet)); // wait for ACK
+                    led_error = LED_OFF;
+                }
+            }
+            // error, we only support a couple of files
+            else {
+                led_error = LED_ON;
+                tftp_send_error(tftp_server, client, 0, "file not found, this board only has u-boot-env_txt and ethtest_bin");
+                wait(3); // three seconds
+                led_error = LED_OFF;
+            }
         }
         // error, we only support read requests
-        else tftp_send_error(tftp_server, client, 0, "this test board only supports reading the u-boot-env.txt file");
+        else {
+            led_error = LED_ON;
+            tftp_send_error(tftp_server, client, 0, "this test board only supports read requests");
+            wait(3); // three seconds
+            led_error = LED_OFF;
+        }
 
         led_connected = LED_ON;
         led_waiting = LED_ON;