added @piwi 's usb speed test.

.. found out that my usb speed is really slow.  Started to look for reasons. Have a win7 64 env, running on a vmware image.

armsrc/appmain.c

@@ -298,18 +298,49 @@ void SendVersion(void)
 	uint32_t compressed_data_section_size = common_area.arg1;
 	cmd_send(CMD_ACK, *(AT91C_DBGU_CIDR), text_and_rodata_section_size + compressed_data_section_size, 0, VersionString, strlen(VersionString));
 }
+
+// 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) 
+{
+	Dbprintf("USB Speed:");
+	Dbprintf("  Sending %d bytes payload...", SpeedTestBufferSize);
+
+	uint8_t *test_data = BigBuf_get_addr();
+
+	uint32_t start_time = GetTickCount();
+
+	LED_B_ON();
+	for(size_t i=0; i < SpeedTestBufferSize; i += USB_CMD_DATA_SIZE) {
+		size_t len = MIN((SpeedTestBufferSize - i), USB_CMD_DATA_SIZE);
+		cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,0,len,0,test_data,len);
+	}
+	LED_B_OFF();
+
+	uint32_t end_time = GetTickCount();
+
+	Dbprintf("  Time elapsed: %dms, USB Transfer Speed PM3 -> Client = %d Bytes/s", 
+		end_time - start_time,
+		1000* SpeedTestBufferSize / (end_time - start_time));
+
+}
+	
 /**
   * Prints runtime information about the PM3.
 **/
-void SendStatus(void)
+void SendStatus(uint32_t SpeedTestBufferSize)
 {
 	BigBuf_print_status();
 	Fpga_print_status();
 	printConfig(); //LF Sampling config
+	printUSBSpeed(SpeedTestBufferSize);
 	Dbprintf("Various");
-	Dbprintf("  MF_DBGLEVEL......%d", MF_DBGLEVEL);
-	Dbprintf("  ToSendMax........%d",ToSendMax);
-	Dbprintf("  ToSendBit........%d",ToSendBit);
+	Dbprintf("  MF_DBGLEVEL........%d", MF_DBGLEVEL);
+	Dbprintf("  ToSendMax..........%d", ToSendMax);
+	Dbprintf("  ToSendBit..........%d", ToSendBit);
+	Dbprintf("  ToSend BUFFERSIZE..%d", TOSEND_BUFFER_SIZE);
+
+	cmd_send(CMD_ACK,1,0,0,0,0);
 }
 
 #if defined(WITH_ISO14443a_StandAlone) || defined(WITH_LF)
@@ -1238,7 +1269,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
 			SendVersion();
 			break;
 		case CMD_STATUS:
-			SendStatus();
+			SendStatus(c->arg[0]);
 			break;
 		case CMD_PING:
 			cmd_send(CMD_ACK,0,0,0,0,0);
@@ -1255,8 +1286,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_FINISH_WRITE:
 		case CMD_HARDWARE_RESET:
 			usb_disable();
-			SpinDelay(1000);
-			SpinDelay(1000);
+			SpinDelay(2000);
 			AT91C_BASE_RSTC->RSTC_RCR = RST_CONTROL_KEY | AT91C_RSTC_PROCRST;
 			for(;;) {
 				// We're going to reset, and the bootrom will take control.

armsrc/util.c

@@ -304,11 +304,12 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers
 
 void StartTickCount()
 {
-//  must be 0x40, but on my cpu - included divider is optimal
-//  0x20 - 1 ms / bit 
-//  0x40 - 2 ms / bit
-
-	AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B
+	// This timer is based on the slow clock. The slow clock frequency is between 22kHz and 40kHz.
+	// We can determine the actual slow clock frequency by looking at the Main Clock Frequency Register.
+    uint16_t mainf = AT91C_BASE_PMC->PMC_MCFR & 0xffff;		// = 16 * main clock frequency (16MHz) / slow clock frequency
+	// set RealTimeCounter divider to count at 1kHz:
+	AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST | ((256000 + (mainf/2)) / mainf);
+	// note: worst case precision is approx 2.5%
 }
 
 /*

client/cmdhw.c

@@ -18,6 +18,7 @@
 #include "cmdhw.h"
 #include "cmdmain.h"
 #include "cmddata.h"
+#include "data.h"
 
 /* low-level hardware control */
 
@@ -404,7 +405,6 @@ int CmdTune(const char *Cmd)
 
 int CmdVersion(const char *Cmd)
 {
-
 	clearCommandBuffer();
 	UsbCommand c = {CMD_VERSION};
 	static UsbCommand resp = {0, {0, 0, 0}};
@@ -428,11 +428,21 @@ int CmdVersion(const char *Cmd)
 
 int CmdStatus(const char *Cmd)
 {
-	UsbCommand c = {CMD_STATUS};
+	uint8_t speed_test_buffer[USB_CMD_DATA_SIZE];
+	sample_buf = speed_test_buffer;
+	#define USB_SPEED_TEST_SIZE (100*USB_CMD_DATA_SIZE)
+
+	clearCommandBuffer();
+	UsbCommand c = {CMD_STATUS, {USB_SPEED_TEST_SIZE}};
 	SendCommand(&c);
+	UsbCommand resp;
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)) {
+		PrintAndLog("Status command failed. USB Speed Test timed out");
+	}
 	return 0;
 }
 
+
 int CmdPing(const char *Cmd)
 {
 	clearCommandBuffer();

client/cmdmain.c

@@ -208,7 +208,6 @@ void UsbCommandReceived(UsbCommand *UC)
 		default:
 			break;
 	}
-
 	storeCommand(UC);
 }
 

client/lualibs/commands.lua

@@ -154,10 +154,10 @@ local _commands = {
 
 
 local _reverse_lookup,k,v = {}
-	for k, v in pairs(_commands) do
+for k, v in pairs(_commands) do
 	_reverse_lookup[v] =  k
-	end
-	_commands.tostring = function(command)
+end
+_commands.tostring = function(command)
 	if(type(command) == 'number') then
 		return ("%s (%d)"):format(_reverse_lookup[command]or "ERROR UNDEFINED!", command) 
 	end
@@ -173,7 +173,6 @@ Command = {
 		self.__index = self
 
 		o.cmd = o.cmd or _commands.CMD_UNKNOWN
-		--o.arg1 = "test"
 		o.arg1 = o.arg1 or 0
 		o.arg2 = o.arg2 or 0
 		o.arg3 = o.arg3 or 0 
@@ -196,13 +195,13 @@ Command = {
 			print(("WARNING; data was NOT a (hex-) string, but was %s"):format(type(data)))
 		end
 		o.data = data	
-		
 		return o
 	end,
-	parse = function (packet)
-		local count,cmd,arg1,arg2,arg3,data = bin.unpack('LLLLH512',packet)
+	parse = function(packet)
+		local count, cmd, arg1, arg2, arg3, data = bin.unpack('LLLLH512', packet)
 		return Command:new{cmd = cmd, arg1 = arg1, arg2 = arg2, arg3 = arg3, data = data}
-	end,
+	end
+
 }
 function Command:__tostring()
 	local output = ("%s\r\nargs : (%s, %s, %s)\r\ndata:\r\n%s\r\n"):format(

common/usb_cdc.c

@@ -256,6 +256,7 @@ void usb_enable() {
 
 	// Wait for a short while
 	for (volatile size_t i=0; i<0x100000; i++);
+    //sleep(1);
 	
 	// Reconnect USB reconnect
 	AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;