Reset to bootloader call added to makefile. Buffer data read function added.

firmware/Makefile

@@ -23,11 +23,17 @@ LUFA_PATH    = ../LUFA/LUFA
 CC_FLAGS     = -DUSE_LUFA_CONFIG_HEADER -IConfig/ -Iuart/
 LD_FLAGS     =
 PROGRAMMER   = dfu-programmer
+MUX_TOOL     =../tools/muxctrl.py
+PYTHON       = python
 
 # Default target
 all:
 
-program:
+reset:
+	-$(PYTHON) $(MUX_TOOL) -d /dev/ttyACM0 -r
+	-sleep 2
+
+program: reset
 	$(PROGRAMMER) $(MCU) erase
 	$(PROGRAMMER) $(MCU) flash $(TARGET).hex
 	$(PROGRAMMER) $(MCU) reset

firmware/command_config.h

@@ -21,7 +21,6 @@
 
 /*****************************************************************************/
 
-
 void cc_setBaudrate(void);
 void cc_getBaudrate(void);
 void cc_setMuxLine(void);

firmware/command_ctrl.c

@@ -144,3 +144,16 @@ void cc_clearReadDataBuffer()
 }
 
 /*****************************************************************************/
+
+uint32_t read32BitFromBuffer(uint8_t pos)
+{
+  uint32_t tmp  = (uint32_t)cc_read_data[pos    ] << 24;
+           tmp += (uint32_t)cc_read_data[pos + 1] << 16;
+           tmp += (uint32_t)cc_read_data[pos + 2] <<  8;
+           tmp += (uint32_t)cc_read_data[pos + 3];
+
+  return tmp;
+}
+
+/*****************************************************************************/
+

firmware/command_ctrl.h

@@ -29,6 +29,8 @@
 
 extern void USB_serialStreamWriteC(char*, uint16_t);
 
+uint32_t read32BitFromBuffer(uint8_t);
+
 void cc_init(void);
 void cc_abort(void);
 void cc_processData(uint8_t);

firmware/command_functions.c

@@ -15,10 +15,7 @@ extern uint32_t baudrate;
 
 void cc_setBaudrate()
 {
-  baudrate  = (uint32_t)cc_read_data[0] << 24;
-  baudrate += (uint32_t)cc_read_data[1] << 16;
-  baudrate += (uint32_t)cc_read_data[2] <<  8;
-  baudrate += (uint32_t)cc_read_data[3];
+  baudrate = read32BitFromBuffer(0);
 
   eeprom_busy_wait();
 

firmware/main.c

@@ -8,14 +8,14 @@
 
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2016.
+     Copyright (C) Dean Camera, 2015.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
-  Copyright 2016  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2015  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
@@ -38,467 +38,359 @@
 
 /** \file
  *
- *  Main source file for the project - based on the Mouse and VirtualSerial lufa demo.
- *  This file contains the main tasks of the demo and is responsible for the initial
- *  application hardware configuration.
+ *  Main source file for the USB2SerialMux. This file contains the main tasks of the application and
+ *  is responsible for the initial hardware configuration.
  */
 
 #include "main.h"
 
-//********************************************************************************//
+/**************************************************************************************/
 
-FIFO_t   agent_fifo;
-FIFO_t seq_mod_fifo;
-FIFO_t seq_val_fifo;
+uint32_t EEMEM eep_baudrate;
 
-uint8_t seq_delay = 0;
+uint32_t baudrate = 115200; // replacement for the UART_BAUDRATE definition
 
-volatile uint16_t                 time_measure_cnt     = 0;
-volatile uint16_t keystroke_delay_time_measure_cnt_old = 0;
-volatile uint16_t       seq_delay_time_measure_cnt_old = 0;
+/**************************************************************************************/
 
-//********************************************************************************//
-
-/** Buffer to hold the previously generated Keyboard HID report, for comparison purposes inside the HID class driver. */
-static uint8_t PrevKeyboardHIDReportBuffer[sizeof(USB_KeyboardReport_Data_t)];
-
-//********************************************************************************//
-
-/** LUFA HID Class driver interface configuration and state information. This structure is
- *  passed to all HID Class driver functions, so that multiple instances of the same class
- *  within a device can be differentiated from one another. This is for the keyboard HID
- *  interface within the device.
+/** Contains the current baud rate and other settings of the first virtual serial port. While this demo does not use
+ *  the physical USART and thus does not use these settings, they must still be retained and returned to the host
+ *  upon request or the host will assume the device is non-functional.
+ *
+ *  These values are set by the host via a class-specific request, however they are not required to be used accurately.
+ *  It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical
+ *  serial link characteristics and instead sends and receives data in endpoint streams.
  */
-USB_ClassInfo_HID_Device_t Keyboard_HID_Interface =
-  {
-    .Config =
-      {
-        .InterfaceNumber  = INTERFACE_ID_Keyboard,
-        .ReportINEndpoint =
-          {
-            .Address = KEYBOARD_IN_EPADDR,
-            .Size    = KEYBOARD_EPSIZE,
-            .Banks   = 1,
-          },
-        .PrevReportINBuffer     = PrevKeyboardHIDReportBuffer,
-        .PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer),
-      },
-  };
+static CDC_LineEncoding_t LineEncoding1 = { .BaudRateBPS = 0,
+                                            .CharFormat  = CDC_LINEENCODING_OneStopBit,
+                                            .ParityType  = CDC_PARITY_None,
+                                            .DataBits    = 8                            };
 
-/** LUFA CDC Class driver interface configuration and state information. This structure is
- *  passed to all CDC Class driver functions, so that multiple instances of the same class
- *  within a device can be differentiated from one another.
+/** Contains the current baud rate and other settings of the second virtual serial port. While this demo does not use
+ *  the physical USART and thus does not use these settings, they must still be retained and returned to the host
+ *  upon request or the host will assume the device is non-functional.
+ *
+ *  These values are set by the host via a class-specific request, however they are not required to be used accurately.
+ *  It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical
+ *  serial link characteristics and instead sends and receives data in endpoint streams.
  */
-USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
-  {
-    .Config =
-      {
-        .ControlInterfaceNumber = INTERFACE_ID_CDC_CCI,
-        .DataINEndpoint         =
-          {
-            .Address          = CDC_TX_EPADDR,
-            .Size             = CDC_TXRX_EPSIZE,
-            .Banks            = 1,
-          },
-        .DataOUTEndpoint =
-          {
-            .Address          = CDC_RX_EPADDR,
-            .Size             = CDC_TXRX_EPSIZE,
-            .Banks            = 1,
-          },
-        .NotificationEndpoint =
-          {
-            .Address          = CDC_NOTIFICATION_EPADDR,
-            .Size             = CDC_NOTIFICATION_EPSIZE,
-            .Banks            = 1,
-          },
-      },
-  };
+static CDC_LineEncoding_t LineEncoding2 = { .BaudRateBPS = 0,
+                                            .CharFormat  = CDC_LINEENCODING_OneStopBit,
+                                            .ParityType  = CDC_PARITY_None,
+                                            .DataBits    = 8                            };
 
-/** Standard file stream for the CDC interface when set up, so that the virtual
- *  CDC COM port can be used like any regular character stream in the C APIs.
- */
-static FILE USBSerialStream;
+/**************************************************************************************/
 
-//********************************************************************************//
-
-/** Main program entry point. This routine contains the overall program flow, including initial
- *  setup of all components and the main program loop.
+/** Main program entry point. This routine configures the hardware required by the application, then
+ *  enters a loop to run the application tasks in sequence.
  */
 int main(void)
 {
-  // USB/LUFA init
   SetupHardware();
 
-  // init the timer for time measurements
-  timer_init();
-
-  // LED matrix init
-  lm_init();
-
-  // KEY matrix init
-  km_init();
-
-  // read the key configuration table from EEPROM
-  ch_readConfig();
-
-  // init the serial communication command controller
+  // initialize the command interpreter
   cc_init();
 
-  FIFO_init(  agent_fifo);
-  FIFO_init(seq_mod_fifo);
-  FIFO_init(seq_val_fifo);
+  SET_ERR_MASK(ERRMASK_USB_NOTREADY);
 
-  // Create a regular character stream for the interface so that it can be used with the stdio.h functions
-  CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);
-
-  SET_GLOB_USB_STATUS(STATUSMASK_USB_NOTREADY);
   GlobalInterruptEnable();
 
   for (;;)
   {
-    SendVirtualSerialData();
-
-    ProcessVirtualSerialData();
-
-    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
-
-    HID_Device_USBTask(&Keyboard_HID_Interface);
+    CDC1_Task();
+    CDC2_Task();
 
     USB_USBTask();
 
-    static uint8_t delay = 0;
-    if (delay > 50)
-    {
-      delay = 0;
-      lm_show();
-    }
-    delay++;
-
+    //uart_putc('1');
   }
 }
 
-//********************************************************************************//
+/**************************************************************************************/
 
-void timer_init()
-{
-  // configure TIMER0 to count using a specified frequency the TCNT0 variable to generate
-  // a overflow interrupt
-  TCCR0A = 0x02; // WGM1 = 1; WGM0 = 0 => CTC-mode
-  TCCR0B = 0x03; // prescaler = 64; WGM2 = 0 => 16MHz * 256 / 64 = ~ 1mz per Overflow Interrupt
-  TIMSK0 = 0x01; // Overflow Interrupt Enable
-
-  sei();
-}
-
-ISR(TCC0_OVF_vect)
-{
-  if (time_measure_cnt >= 65534)
-  {
-    // reset all the counter values to prevent unpredictable behaviour
-                    time_measure_cnt     = 0;
-          seq_delay_time_measure_cnt_old = 0;
-    keystroke_delay_time_measure_cnt_old = 0;
-  }
-  time_measure_cnt++;
-}
-
-//********************************************************************************//
-
-/** Configures the board hardware and chip peripherals for the demo's functionality.
- */
-void SetupHardware()
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
 {
 #if (ARCH == ARCH_AVR8)
-  // Disable watchdog if enabled by bootloader/fuses
+  /* Disable watchdog if enabled by bootloader/fuses */
   MCUSR &= ~(1 << WDRF);
   wdt_disable();
 
-  // Disable clock division */
+  /* Disable clock division */
   clock_prescale_set(clock_div_1);
 
 #elif (ARCH == ARCH_XMEGA)
-  // Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU
-  // core to run from it
+  /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
   XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
   XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
 
-  // Start the 32MHz internal RC oscillator and start the DFLL to increase it to
-  // 48MHz using the USB SOF as a reference
+  /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
   XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
   XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
 
   PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
 #endif
 
-  // Hardware Initialization */
+  // set the three MUX control lines to output
+  DDRB  |= (1 << PIN4) | (1 << PIN5) | (1 << PIN6);
+  // set every pin to low
+  EN_MUX_LINE0;
+
+  DDRB |= (1 << PIN0) | (1 << PIN1);
+
+  LED0_OFF;
+  LED1_OFF;
+
+  /* UART Hardware Initialization */
+  eeprom_busy_wait();
+  baudrate = eeprom_read_dword(&eep_baudrate);
+
+  if (baudrate == 0xffffffff)
+  {
+    eeprom_busy_wait();
+    baudrate = 115200;
+    eeprom_write_dword(&eep_baudrate, baudrate);
+  }
+
+  // initialize the uart to the default baudrate
+  uart_init( UART_BAUD_SELECT(baudrate, F_CPU) );
+  sei();
+
+  /* USB Hardware Initialization */
   USB_Init();
 }
 
-//********************************************************************************//
+/**************************************************************************************/
 
-void ProcessVirtualSerialData()
-{
-
-  // process the read data from Host here, if there is data to read
-  int16_t ReceivedBytes = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
-  if (ReceivedBytes > 0)
-  {
-    for (uint16_t i = 0; i < ReceivedBytes; i++)
-    {
-      int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
-      // call the command controller - command processor
-      cc_processData((uint8_t)ReceivedByte);
-    }
-  }
-
-}
-
-//********************************************************************************//
-
-void SendVirtualSerialData()
-{
-  char* ReportString  = NULL;
-
-  // send the next id from the agent FIFO
-  if (FIFO_available(agent_fifo))
-  {
-    uint8_t id = FIFO_pop(agent_fifo);
-    ReportString = "     ";
-    sprintf(ReportString, "%c%c%c%c%c%c", MSG_SOM1, MSG_SOM2,
-                                          MSG_TYPE_AGENTID, id,
-                                          MSG_EOM1, MSG_EOM2);
-  }
-
-  if ((ReportString != NULL))
-  {
-    // Write the string to the virtual COM port via the created character stream
-    USB_serialStreamWriteC(ReportString, 6);
-  }
-}
-
-//********************************************************************************//
-
-/** HID class driver callback function for the creation of HID reports to the host.
- *
- *  \param[in]     HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
- *  \param[in,out] ReportID    Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
- *  \param[in]     ReportType  Type of the report to create, either HID_REPORT_ITEM_In or HID_REPORT_ITEM_Feature
- *  \param[out]    ReportData  Pointer to a buffer where the created report should be stored
- *  \param[out]    ReportSize  Number of bytes written in the report (or zero if no report is to be sent)
- *
- *  \return Boolean \c true to force the sending of the report, \c false to let the library determine if it needs to be sent
+/** Function to manage CDC data transmission and reception to and from the host for the first CDC interface,
+ *  which sends answers or response data to the host.
  */
-bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo,
-                                         uint8_t* const ReportID,
-                                         const uint8_t ReportType,
-                                         void* ReportData,
-                                         uint16_t* const ReportSize)
+void CDC1_Task(void)
 {
+  /* Device must be connected and configured for the task to run */
+  if (USB_DeviceState != DEVICE_STATE_Configured)
+    return;
 
-  // Determine which interface must have its report generated */
-  if (HIDInterfaceInfo == &Keyboard_HID_Interface)
+  /* Select the Serial Rx Endpoint */
+  Endpoint_SelectEndpoint(CDC1_RX_EPADDR);
+
+  if (Endpoint_IsOUTReceived())
   {
-    USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;
+    /* Create a temp buffer big enough to hold the incoming endpoint packet */
+    uint8_t  Buffer[Endpoint_BytesInEndpoint()];
 
-    // update the key matrix values
-    km_updateKeyStates();
+    /* Remember how large the incoming packet is */
+    uint16_t DataLength = Endpoint_BytesInEndpoint();
 
-    // prepare the new sequence related to the pressed key
-    for (uint8_t k = 0; k < LM_LED_CNT; k++)
+    /* Read in the incoming packet into the buffer */
+    Endpoint_Read_Stream_LE(&Buffer, DataLength, NULL);
+
+    /* Finalize the stream transfer to send the last packet */
+    Endpoint_ClearOUT();
+
+    for (uint16_t i = 0; i < DataLength; i++)
     {
-      if (km_getKeyState(k) == KEY_STATE_GO_DOWN)
-      {
-        FIFO_push(agent_fifo, k);
-
-        for (uint8_t s = 0; s < EEP_KEY_CNT; s++)
-        {
-          // ignore a mod/value combination of 0xff 0xff
-          // just add the sequence to a "sequence execution FIFO" in case that it
-          // is not an agent call
-          // prevent multiple calls
-
-          // TODO manage multikey (simultanous pressed) shortcuts here
-
-          if (key_config[k][s][0] == 0xff && key_config[k][s][1] == 0xff)
-          {
-            s = EEP_KEY_CNT; // abort the loop, no more data found
-          } else {
-            FIFO_push(seq_mod_fifo, key_config[k][s][0]);
-            FIFO_push(seq_val_fifo, key_config[k][s][1]);
-          }
+      // process the received data and descide to do an action
+      LED0_ON;
+      cc_processData(Buffer[i]);
+      LED0_OFF;
     }
+
   }
 }
 
-    // TODO maybe we shall do ab bit more precise time measurement
-    if (seq_delay > 0 && time_measure_cnt > seq_delay_time_measure_cnt_old)
+/**************************************************************************************/
+
+void USB_serialStreamWriteC(char *data, uint16_t len)
 {
-      seq_delay--;
-      seq_delay_time_measure_cnt_old = time_measure_cnt;
-    }
-
-    if (keystroke_delay_cnt > 0 && time_measure_cnt > keystroke_delay_time_measure_cnt_old)
-    {
-      // TODO test if NN seconds are gone
-      keystroke_delay_cnt--;
-      keystroke_delay_time_measure_cnt_old = time_measure_cnt;
-    }
-
-    // execute the sequence execution FIFO content
-    if (FIFO_available(seq_mod_fifo) && FIFO_available(seq_val_fifo) &&
-        seq_delay == 0 && keystroke_delay_cnt == 0)
-    {
-      uint8_t mod = FIFO_pop(seq_mod_fifo);
-      uint8_t val = FIFO_pop(seq_val_fifo);
-
-      // reset the keystroke delay
-      keystroke_delay_cnt = keystroke_delay;
-
-      // process the data
-      if ((mod & KEY_MOD_DELAY) != 0)
-      {
-        // start the delay
-        seq_delay = val;
-      } else {
-        // TODO be aware of the os_type variable
-        if ((mod & KEY_MOD_FN)    != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_RIGHTSHIFT; // TODO fix the modifier
-        if ((mod & KEY_MOD_SHIFT) != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_LEFTSHIFT;
-        if ((mod & KEY_MOD_CTRL)  != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_LEFTCTRL;
-        if ((mod & KEY_MOD_ALT)   != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_LEFTALT;
-        if ((mod & KEY_MOD_ALTGR) != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_RIGHTALT;
-        if ((mod & KEY_MOD_SUPER) != 0)
-          KeyboardReport->Modifier += HID_KEYBOARD_MODIFIER_LEFTGUI;
-
-        // possible values: http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/group___group___u_s_b_class_h_i_d_common.html
-        KeyboardReport->KeyCode[0] = val; // TODO one key at a time, up to 6 is supported: http://www.fourwalledcubicle.com/files/LUFA/Doc/120219/html/struct_u_s_b___keyboard_report___data__t.html#a1c24d97011685d58ab05e2f65d7b2c1b
-      }
-    }
-
-    // Some debug and test code
-    for (uint8_t i = 0; i < LM_LED_CNT; i++)
-    {
-      if (km_getKeyState(i) == KEY_STATE_GO_DOWN)
-        lm_ledOn(i);
-      if (km_getKeyState(i) == KEY_STATE_GO_UP)
-        lm_ledOff(i);
-    }
-
-    *ReportSize = sizeof(USB_KeyboardReport_Data_t);
-
-  }
-  return false;
-}
-
-//********************************************************************************//
-
-/** HID class driver callback function for the processing of HID reports from the host.
- *
- *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
- *  \param[in] ReportID    Report ID of the received report from the host
- *  \param[in] ReportType  The type of report that the host has sent, either HID_REPORT_ITEM_Out or HID_REPORT_ITEM_Feature
- *  \param[in] ReportData  Pointer to a buffer where the received report has been stored
- *  \param[in] ReportSize  Size in bytes of the received HID report
- */
-void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo,
-                                          const uint8_t ReportID,
-                                          const uint8_t ReportType,
-                                          const void* ReportData,
-                                          const uint16_t ReportSize)
-{
-  if (HIDInterfaceInfo == &Keyboard_HID_Interface)
-  {
-    uint8_t* LEDReport = (uint8_t*)ReportData;
-
-    /*
-    // TODO process the Keyboard LED status information
-    if (*LEDReport & HID_KEYBOARD_LED_NUMLOCK)
-
-    if (*LEDReport & HID_KEYBOARD_LED_CAPSLOCK)
-
-    if (*LEDReport & HID_KEYBOARD_LED_SCROLLLOCK)
+  /* Determine if data/answeres should be sent to the host
+   * the previous RX section should be clarify that behaviour.
    */
 
-  }
-}
-
-//********************************************************************************//
-
-/** CDC class driver callback function the processing of changes to the virtual
- *  control lines sent from the host..
- *
- *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
- */
-void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
+  /* Flag management - Only allow one string to be sent per action */
+  if (data != NULL && len > 0 && LineEncoding1.BaudRateBPS)
   {
-  // You can get changes to the virtual CDC lines in this callback; a common
-  // use-case is to use the Data Terminal Ready (DTR) flag to enable and
-  // disable CDC communications in your application when set to avoid the
-  // application blocking while waiting for a host to become ready and read
-  // in the pending data from the USB endpoints.
 
-  bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
+    LED1_ON;
+
+    /* Select the Serial Tx Endpoint */
+    Endpoint_SelectEndpoint(CDC1_TX_EPADDR);
+
+    /* Write the String to the Endpoint */
+    Endpoint_Write_Stream_LE(data, len, NULL);
+
+    /* Finalize the stream transfer to send the last packet */
+    Endpoint_ClearIN();
+
+    /* Wait until the endpoint is ready for another packet */
+    Endpoint_WaitUntilReady();
+
+    /* Send an empty packet to ensure that the host does not buffer data sent to it */
+    Endpoint_ClearIN();
+
+    LED1_OFF;
+  }
 }
 
-//********************************************************************************//
+/**************************************************************************************/
 
-/** Event handler for the library USB Connection event. */
+/** Function to manage CDC data transmission and reception to and from the host for the second CDC interface,
+ *  which sends all data received from a node (mux) during USART to the host.
+ */
+void CDC2_Task(void)
+{
+  /* Device must be connected and configured for the task to run */
+  if (USB_DeviceState != DEVICE_STATE_Configured)
+    return;
+
+  //=====================================
+  /* Select the Serial Rx Endpoint */
+  Endpoint_SelectEndpoint(CDC2_RX_EPADDR);
+
+  /* Check to see if any data has been received */
+  if (Endpoint_IsOUTReceived())
+  {
+    /* Create a temp buffer big enough to hold the incoming endpoint packet */
+    uint8_t  Buffer[Endpoint_BytesInEndpoint()];
+
+    /* Remember how large the incoming packet is */
+    uint16_t DataLength = Endpoint_BytesInEndpoint();
+
+    /* Read in the incoming packet into the buffer */
+    Endpoint_Read_Stream_LE(&Buffer, DataLength, NULL);
+
+    /* Finalize the stream transfer to send the last packet */
+    Endpoint_ClearOUT();
+
+    // at this point send the data to the USART
+    // Send USART &Buffer
+    for (uint16_t i = 0; i < DataLength; i++)
+    {
+      uart_putc(Buffer[i]);
+    }
+  }
+
+  //=====================================
+  uint8_t outBuffer[OUTPUT_BUFFER_SIZE];
+  // read the USART data and send them to the host
+  // Fill &Buffer with USART data or send the USART input buffer direct
+  uint16_t cnt = 0;
+  int c = uart_getc();
+  while (!(c & UART_NO_DATA) && cnt < OUTPUT_BUFFER_SIZE)
+  {
+    //LED0_ON;
+    outBuffer[cnt] = c;
+    c = uart_getc();
+    cnt++;
+  }
+
+  // send the data which was received from the uart connection
+  if (cnt > 0)
+  {
+    /* Select the Serial Tx Endpoint */
+    Endpoint_SelectEndpoint(CDC2_TX_EPADDR);
+
+    /* Write the received data to the endpoint */
+    Endpoint_Write_Stream_LE(&outBuffer, cnt, NULL);
+
+    /* Finalize the stream transfer to send the last packet */
+    Endpoint_ClearIN();
+
+    /* Wait until the endpoint is ready for the next packet */
+    Endpoint_WaitUntilReady();
+
+    /* Send an empty packet to prevent host buffering */
+    Endpoint_ClearIN();
+  }
+}
+
+/**************************************************************************************/
+
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
+ *  starts the library USB task to begin the enumeration and USB management process.
+ */
 void EVENT_USB_Device_Connect(void)
 {
-  SET_GLOB_USB_STATUS(STATUSMASK_USB_ENUMERATING);
+  /* Indicate USB enumerating */
+  SET_ERR_MASK(ERRMASK_USB_ENUMERATING);
 }
 
-/** Event handler for the library USB Disconnection event. */
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
+ *  the status LEDs and stops the USB management and CDC management tasks.
+ */
 void EVENT_USB_Device_Disconnect(void)
 {
-  SET_GLOB_USB_STATUS(STATUSMASK_USB_NOTREADY);
+  /* Indicate USB not ready */
+  SET_ERR_MASK(ERRMASK_USB_NOTREADY);
 }
 
-/** Event handler for the library USB Configuration Changed event. */
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
+ *  of the USB device after enumeration - the device endpoints are configured and the CDC management tasks are started.
+ */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {
   bool ConfigSuccess = true;
 
-  ConfigSuccess &= HID_Device_ConfigureEndpoints(&Keyboard_HID_Interface);
-  ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+  /* Setup first CDC Interface's Endpoints */
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1);
 
-  USB_Device_EnableSOFEvents();
+  /* Setup second CDC Interface's Endpoints */
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
+  ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1);
 
-  SET_GLOB_USB_STATUS(ConfigSuccess ? STATUSMASK_USB_READY : STATUSMASK_USB_ERROR);
+  /* Reset line encoding baud rates so that the host knows to send new values */
+  LineEncoding1.BaudRateBPS = 0;
+  LineEncoding2.BaudRateBPS = 0;
+
+  /* Indicate endpoint configuration success or failure */
+  SET_ERR_MASK(ConfigSuccess ? ERRMASK_USB_READY : ERRMASK_USB_ERROR);
 }
 
-/** Event handler for the library USB Control Request reception event. */
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ *  the device from the USB host before passing along unhandled control requests to the library for processing
+ *  internally.
+ */
 void EVENT_USB_Device_ControlRequest(void)
 {
-  HID_Device_ProcessControlRequest(&Keyboard_HID_Interface);
-  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
-}
+  /* Determine which interface's Line Coding data is being set from the wIndex parameter */
+  void* LineEncodingData = (USB_ControlRequest.wIndex == 0) ? &LineEncoding1 : &LineEncoding2;
 
-/** Event handler for the USB device Start Of Frame event. */
-void EVENT_USB_Device_StartOfFrame(void)
+  /* Process CDC specific control requests */
+  switch (USB_ControlRequest.bRequest)
   {
-  HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
-}
-
-//********************************************************************************//
-
-void USB_serialStreamWriteC(char* msg, uint16_t len)
+    case CDC_REQ_GetLineEncoding:
+      if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
       {
-  for (uint8_t i = 0; i < len; i++)
+        Endpoint_ClearSETUP();
+
+        /* Write the line coding data to the control endpoint */
+        Endpoint_Write_Control_Stream_LE(LineEncodingData, sizeof(CDC_LineEncoding_t));
+        Endpoint_ClearOUT();
+      }
+
+      break;
+    case CDC_REQ_SetLineEncoding:
+      if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
       {
-    fputc(msg[i], &USBSerialStream);
-  }
+        Endpoint_ClearSETUP();
+
+        /* Read the line coding data in from the host into the global struct */
+        Endpoint_Read_Control_Stream_LE(LineEncodingData, sizeof(CDC_LineEncoding_t));
+        Endpoint_ClearIN();
       }
 
-void USB_serialStreamWrite(char* msg)
+      break;
+    case CDC_REQ_SetControlLineState:
+      if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
       {
-  fputs(msg, &USBSerialStream);
+        Endpoint_ClearSETUP();
+        Endpoint_ClearStatusStage();
       }
 
-//********************************************************************************//
+      break;
+  }
+}
 
+/**************************************************************************************/

firmware/main.h

@@ -58,7 +58,6 @@
 
   /* UART definitions: */
 
-    //#define UART_BAUD_RATE     115200
     #define OUTPUT_BUFFER_SIZE 100
 
     #include "uart/uart.h" // include after the definition

pcb/USB2SerialMux.kicad_pcb

@@ -3,7 +3,7 @@
   (general
     (links 130)
     (no_connects 0)
-    (area 123.956999 89.993 192.560334 117.376333)
+    (area 124.409999 91.389999 190.296001 116.890001)
     (thickness 1.6)
     (drawings 8)
     (tracks 651)
@@ -281,11 +281,6 @@
       (net 71 /RESET))
     (pad 6 smd rect (at 3.302 -5.08 270) (size 3 1) (layers B.Cu B.Paste B.Mask)
       (net 1 GND))
-    (model Pin_Headers.3dshapes/Pin_Header_Straight_2x03.wrl
-      (at (xyz 0.05 -0.1 0))
-      (scale (xyz 1 1 1))
-      (rotate (xyz 0 0 90))
-    )
   )
 
   (module Housings_SSOP:TSSOP-16_4.4x5mm_Pitch0.65mm (layer B.Cu) (tedit 579A4441) (tstamp 5789E0C1)

pcb/USB2SerialMux.pro

@@ -1,4 +1,4 @@
-update=25.08.2016 18:28:32
+update=27.09.2016 11:23:30
 version=1
 last_client=kicad
 [cvpcb]
@@ -86,7 +86,7 @@ LibName34=crystal
 [schematic_editor]
 version=1
 PageLayoutDescrFile=
-PlotDirectoryName=
+PlotDirectoryName=usb2serialmux_sch.svg
 SubpartIdSeparator=0
 SubpartFirstId=65
 NetFmtName=

tools/logClusterBootup.sh

@@ -1,23 +1,28 @@
 #!/bin/bash
 
 # reset the mux device to default values
-pypy ./muxctrl.py -g -m -l 0 -s 115200
+python ./muxctrl.py -b -m -l 0 -s 115200
 
 # TODO start logging of the received data
+./readTTYToFile.sh /dev/ttyACM1 &
+
+sleep 2
 
 # read from line 0 to 7
 for i in `seq 0 7`;
 do
   echo "channel #"$i
 
-  pypy ./muxctrl.py -l $i
+  python ./muxctrl.py -l $i -m
 
+  echo sleep 30 seconds
   sleep 30
 done
 
 sleep 3
 
 # TODO stop logging of the received data
+killall -12 readTTYToFile.sh
 
-pypy ./muxctrl.py -g -m -l 0 -s 115200
+python ./muxctrl.py -b -m -l 0 -s 115200
 

tools/muxctrl.py

@@ -6,15 +6,17 @@ import threading
 import time
 import serial
 import copy
+import binascii
 
 ###############################################################################
 
 parser = argparse.ArgumentParser(description='USB2SerialMux control helper tool.')
-parser.add_argument("-g", "--getBaudrate",  default=False, help="Get the baudrate for the USART connection.", action='store_true')
+parser.add_argument("-b", "--getBaudrate",  default=False, help="Get the baudrate for the USART connection.", action='store_true')
 parser.add_argument("-s", "--setBaudrate",       type=int, help="Something like 9600 or 115200.")
 parser.add_argument("-m", "--getMuxLine",   default=False, help="Get the current multiplexer control line state.", action='store_true')
 parser.add_argument("-l", "--setMuxLine",        type=int, help="Something like 0 to 7.")
 parser.add_argument("-r", "--resetToBtldr", default=False, help="Reset the device to the LUFA bootloader.", action='store_true')
+parser.add_argument("-d", "--device",            type=str, help="The control device like /dev/ttyACM0 or COM3.")
 
 ###############################################################################
 
@@ -53,6 +55,7 @@ MUX_MAX_VAL = 7
 ###############################################################################
 
 ser    = None
+device = "/dev/ttyACM0"
 
 ###############################################################################
 
@@ -135,10 +138,13 @@ def cc_dataReceiverThread():
 
     # 1. read byte from serial port into incoming
     incoming = []
-    incoming = ser.read(64)
+    bytesToRead = ser.inWaiting()
+    if bytesToRead > 0:
+      incoming = list(ser.read(64))
 
       # 2. process the received data
       for c in incoming:
+        c = int(binascii.hexlify(c), 16)
 
         # call the cc_state specific function to process the currently received byte
         cc_state_fn[cc_state](c)
@@ -147,7 +153,6 @@ def cc_dataReceiverThread():
         cc_state = CC_STATE_WAIT_SOD1
 
     time.sleep(THREAD_LOOP_DELAY_S)
-    thread_stop = True
 
   thread_started = False
 
@@ -210,6 +215,7 @@ def cc_state_fn_get_type(c):
 
   if c in msg_type_list:
     msg_type = c
+
     if msg_type_data_to_read[msg_type] > 0:
       cc_state = CC_STATE_READ_DATA
     else:
@@ -249,7 +255,6 @@ def cc_state_fn_wait_for_eod2(c):
   global cc_state
 
   if c == MSG_EOD2:
-    # TODO process or save the data
     is_message_read = False
     thread_lock.acquire()
     cc_received_messages.append([ cc_message_cnt,
@@ -304,7 +309,14 @@ def openSerialDevice(d):
   global ser
 
   # Why 115200? Because the host defines the baudrate for the USB serial connection.
+  try:
+    if "com" in d.lower():
+      d = "\\\\.\\" + d
+
     ser = serial.Serial(d, 115200, timeout=0)
+  except:
+    print "ERROR: Can't open the serial device " + d
+    exit(1)
 
 #####
 def closeSerialDevice():
@@ -318,9 +330,9 @@ def sendSerialData(data):
 
   global ser
 
-  ser.write([ MSG_SOD1, MSG_SOD2 ])
+  ser.write(bytearray([ MSG_SOD1, MSG_SOD2 ]))
   ser.write(bytearray(data))
-  ser.write([ MSG_EOD1, MSG_EOD2 ])
+  ser.write(bytearray([ MSG_EOD1, MSG_EOD2 ]))
 
 ###############################################################################
 
@@ -335,7 +347,10 @@ if __name__ == "__main__":
   timeout  = 0
 
   # 1. open serial device or abort
-  openSerialDevice("/dev/ttyACM0")
+  if args.device != None:
+    device = args.device
+
+  openSerialDevice(device)
 
   # 2. start thread to poll cc_dataReceiverThread()
   cc_startReceiverThread()
@@ -426,3 +441,4 @@ if __name__ == "__main__":
   closeSerialDevice()
 
   exit(0)
+

tools/readTTYToFile.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+TTY_DEV=$1 # or /dev/ttyACM1
+OUT_FILE=$2
+
+if [ -z "$TTY_DEV" ];
+then
+  TTY_DEV=/dev/ttyACM1
+fi
+
+if [ -z "$OUT_FILE" ];
+then
+  OUT_FILE="tty_bootup_seq.log"
+fi
+
+echo "Read from "$TTY_DEV" and write to "$OUT_FILE
+
+while read line; do
+     if [ "$line" != "EOF" ]; then
+          echo "$line" >> $OUT_FILE
+     else
+          break
+     fi
+done < $TTY_DEV
+