fix: avoid USB Speed Test timeout in case of slow transfer speeds

fix: don't add CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K commands into command buffer

armsrc/appmain.c

@@ -301,39 +301,42 @@ void SendVersion(void)
 
 // measure the USB Speed by sending SpeedTestBufferSize bytes to client and measuring the elapsed time.
 // Note: this mimics GetFromBigbuf(), i.e. we have the overhead of the UsbCommand structure included.
-void printUSBSpeed(uint32_t SpeedTestBufferSize) 
+void printUSBSpeed(void) 
 {
 	Dbprintf("USB Speed:");
-	Dbprintf("  Sending %d bytes payload...", SpeedTestBufferSize);
+	Dbprintf("  Sending USB packets to client...");
 
+	#define USB_SPEED_TEST_MIN_TIME	1500	// in milliseconds
 	uint8_t *test_data = BigBuf_get_addr();
+	uint32_t end_time;
 
-	uint32_t start_time = GetTickCount();
+	uint32_t start_time = end_time = GetTickCount();
-
+	uint32_t bytes_transferred = 0;
+	
 	LED_B_ON();
-	for(size_t i=0; i<SpeedTestBufferSize; i += USB_CMD_DATA_SIZE) {
+	while(end_time < start_time + USB_SPEED_TEST_MIN_TIME) {
-		size_t len = MIN((SpeedTestBufferSize - i), USB_CMD_DATA_SIZE);
+		cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K, 0, USB_CMD_DATA_SIZE, 0, test_data, USB_CMD_DATA_SIZE);
-		cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,0,len,0,test_data,len);
+		end_time = GetTickCount();
+		bytes_transferred += USB_CMD_DATA_SIZE;
 	}
 	LED_B_OFF();
 
-	uint32_t end_time = GetTickCount();
+	Dbprintf("  Time elapsed:      %dms", end_time - start_time);
-
+	Dbprintf("  Bytes transferred: %d", bytes_transferred);
-	Dbprintf("  Time elapsed: %dms, USB Transfer Speed PM3 -> Client = %d Bytes/s", 
+	Dbprintf("  USB Transfer Speed PM3 -> Client = %d Bytes/s", 
-		end_time - start_time,
+		1000 * bytes_transferred / (end_time - start_time));
-		1000* SpeedTestBufferSize / (end_time - start_time));
 
 }
 	
 /**
   * Prints runtime information about the PM3.
 **/
-void SendStatus(uint32_t SpeedTestBufferSize)
+void SendStatus(void)
 {
 	BigBuf_print_status();
 	Fpga_print_status();
 	printConfig(); //LF Sampling config
-	printUSBSpeed(SpeedTestBufferSize);
+	printUSBSpeed();
 	Dbprintf("Various");
 	Dbprintf("  MF_DBGLEVEL......%d", MF_DBGLEVEL);
 	Dbprintf("  ToSendMax........%d",ToSendMax);
@@ -1242,7 +1245,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
 			SendVersion();
 			break;
 		case CMD_STATUS:
-			SendStatus(c->arg[0]);
+			SendStatus();
 			break;
 		case CMD_PING:
 			cmd_send(CMD_ACK,0,0,0,0,0);

client/cmdhw.c

@@ -431,12 +431,11 @@ int CmdStatus(const char *Cmd)
 {
 	uint8_t speed_test_buffer[USB_CMD_DATA_SIZE];
 	sample_buf = speed_test_buffer;
-	#define USB_SPEED_TEST_SIZE (1000*USB_CMD_DATA_SIZE)
 
 	clearCommandBuffer();
-	UsbCommand c = {CMD_STATUS, {USB_SPEED_TEST_SIZE}};
+	UsbCommand c = {CMD_STATUS};
 	SendCommand(&c);
-	if (!WaitForResponseTimeout(CMD_ACK,&c,1500)) {
+	if (!WaitForResponseTimeout(CMD_ACK,&c,1900)) {
 		PrintAndLog("Status command failed. USB Speed Test timed out");
 	}
 	return 0;

client/cmdmain.c

@@ -97,8 +97,9 @@ void storeCommand(UsbCommand *command)
     memcpy(destination, command, sizeof(UsbCommand));
 
     cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
-
 }
+
+
 /**
  * @brief getCommand gets a command from an internal circular buffer.
  * @param response location to write command
@@ -117,9 +118,9 @@ int getCommand(UsbCommand* response)
     cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
 
     return 1;
-
 }
 
+
 /**
  * Waits for a certain response type. This method waits for a maximum of
  * ms_timeout milliseconds for a specified response command.
@@ -133,9 +134,9 @@ bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeou
   
 	UsbCommand resp;
 	
-	if (response == NULL)
+	if (response == NULL) {
 		response = &resp;
-
+	}
 
 	// Wait until the command is received
 	for(size_t dm_seconds=0; dm_seconds < ms_timeout/10; dm_seconds++) {
@@ -144,19 +145,21 @@ bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeou
 				return true;
 			}
 		}
-        msleep(10); // XXX ugh
+		msleep(10); // XXX ugh
-        if (dm_seconds == 200) { // Two seconds elapsed
+		if (dm_seconds == 200) { // Two seconds elapsed
 			PrintAndLog("Waiting for a response from the proxmark...");
 			PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
-        }
+		}
 	}
-    return false;
+	return false;
 }
 
+
 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
 	return WaitForResponseTimeout(cmd,response,-1);
 }
 
+
 //-----------------------------------------------------------------------------
 // Entry point into our code: called whenever the user types a command and
 // then presses Enter, which the full command line that they typed.
@@ -165,6 +168,7 @@ void CommandReceived(char *Cmd) {
   CmdsParse(CommandTable, Cmd);
 }
 
+
 //-----------------------------------------------------------------------------
 // Entry point into our code: called whenever we received a packet over USB
 // that we weren't necessarily expecting, for example a debug print.
@@ -188,12 +192,13 @@ void UsbCommandReceived(UsbCommand *UC)
 
 		case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
 			memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
+			return;
 		} break;
 
 		default:
+			storeCommand(UC);
 			break;
 	}
 
-	storeCommand(UC);
 }