#include <stdarg.h>
 
 #include "usb_cdc.h"
-#include "cmd.h"
 #include "proxmark3.h"
 #include "apps.h"
 #include "fpga.h"
 
 
 void SendVersion(void) {
+       LED_A_ON();
        set_hw_capabilities();
 
        char temp[USB_CMD_DATA_SIZE]; /* Limited data payload in USB packets */
        // Send Chip ID and used flash memory
        uint32_t text_and_rodata_section_size = (uint32_t)&__data_src_start__ - (uint32_t)&_flash_start;
        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, hw_capabilities, VersionString, strlen(VersionString));
+       cmd_send(CMD_ACK, *(AT91C_DBGU_CIDR), text_and_rodata_section_size + compressed_data_section_size, hw_capabilities, VersionString, strlen(VersionString) + 1);
+       LED_A_OFF();
 }
 
 // measure the USB Speed by sending SpeedTestBufferSize bytes to client and measuring the elapsed time.
        uint32_t start_time = end_time = GetTickCount();
        uint32_t bytes_transferred = 0;
 
-       LED_B_ON();
-       while(end_time < start_time + USB_SPEED_TEST_MIN_TIME) {
+       while (end_time < start_time + USB_SPEED_TEST_MIN_TIME) {
                cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K, 0, USB_CMD_DATA_SIZE, 0, test_data, USB_CMD_DATA_SIZE);
                end_time = GetTickCount();
                bytes_transferred += USB_CMD_DATA_SIZE;
        }
-       LED_B_OFF();
 
        Dbprintf("  Time elapsed:      %dms", end_time - start_time);
        Dbprintf("  Bytes transferred: %d", bytes_transferred);
   * Prints runtime information about the PM3.
 **/
 void SendStatus(void) {
+       LED_A_ON();
        BigBuf_print_status();
        Fpga_print_status();
 #ifdef WITH_SMARTCARD
        Dbprintf("  ToSendMax..........%d", ToSendMax);
        Dbprintf("  ToSendBit..........%d", ToSendBit);
 
-       cmd_send(CMD_ACK,1,0,0,0,0);
+       cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
+       LED_A_OFF();
 }
 
 #if defined(WITH_ISO14443a_StandAlone) || defined(WITH_LF_StandAlone)
 }
 
 
-void UsbPacketReceived(uint8_t *packet, int len) {
-
-       UsbCommand *c = (UsbCommand *)packet;
+void UsbPacketReceived(UsbCommand *c) {
 
 //  Dbprintf("received %d bytes, with command: 0x%04x and args: %d %d %d",len,c->cmd,c->arg[0],c->arg[1],c->arg[2]);
 
                        break;
 
                case CMD_FPGA_MAJOR_MODE_OFF:       // ## FPGA Control
+                       LED_A_ON();
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                        SpinDelay(200);
                        LED_D_OFF(); // LED D indicates field ON or OFF
+                       LED_A_OFF();
                        break;
 
                case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
                case CMD_DEVICE_INFO: {
                        uint32_t dev_info = DEVICE_INFO_FLAG_OSIMAGE_PRESENT | DEVICE_INFO_FLAG_CURRENT_MODE_OS;
                        if(common_area.flags.bootrom_present) dev_info |= DEVICE_INFO_FLAG_BOOTROM_PRESENT;
-                       cmd_send(CMD_DEVICE_INFO,dev_info,0,0,0,0);
+                       cmd_send_old(CMD_DEVICE_INFO,dev_info,0,0,0,0);
                        break;
                }
                default:
        LCDInit();
 #endif
 
-       uint8_t rx[sizeof(UsbCommand)];
-       size_t rx_len;
-
+       UsbCommand rx;
+  
        for(;;) {
                WDT_HIT();
-               if (usb_poll() && (rx_len = usb_read(rx, sizeof(rx)))) {
-                       UsbPacketReceived(rx, rx_len);
+               if (cmd_receive(&rx)) {
+                       UsbPacketReceived(&rx);
                } else {
 #if defined(WITH_LF_StandAlone) && !defined(WITH_ISO14443a_StandAlone)
                        if (BUTTON_HELD(1000) > 0)