Mark build test makefiles as being incompatible with parallel make builds, as they...

[pub/USBasp.git] / Bootloaders / CDC / BootloaderCDC.c

diff --git a/Bootloaders/CDC/BootloaderCDC.c b/Bootloaders/CDC/BootloaderCDC.c
index f4a2d6c..af778c7 100644 (file)
--- a/Bootloaders/CDC/BootloaderCDC.c
+++ b/Bootloaders/CDC/BootloaderCDC.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
 /*
              LUFA Library

-     Copyright (C) Dean Camera, 2011.
+     Copyright (C) Dean Camera, 2012.

 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*

-  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2012  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
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted


@@ -56,6 +56,55 @@ static uint32_t CurrAddress;
  */
 static bool RunBootloader = true;
 
  */
 static bool RunBootloader = true;
 

+/** Magic lock for forced application start. If the HWBE fuse is programmed and BOOTRST is unprogrammed, the bootloader
+ *  will start if the /HWB line of the AVR is held low and the system is reset. However, if the /HWB line is still held
+ *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
+ *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
+ */
+uint16_t MagicBootKey ATTR_NO_INIT;
+
+
+/** Special startup routine to check if the bootloader was started via a watchdog reset, and if the magic application
+ *  start key has been loaded into \ref MagicBootKey. If the bootloader started via the watchdog and the key is valid,
+ *  this will force the user application to start via a software jump.
+ */
+void Application_Jump_Check(void)
+{
+       bool JumpToApplication = false;
+
+       #if ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
+               /* Disable JTAG debugging */
+               JTAG_DISABLE();
+
+               /* Enable pull-up on the JTAG TCK pin so we can use it to select the mode */
+               PORTF |= (1 << 4);
+               Delay_MS(10);
+
+               /* If the TCK pin is not jumpered to ground, start the user application instead */
+               JumpToApplication |= ((PINF & (1 << 4)) != 0);
+
+               /* Re-enable JTAG debugging */
+               JTAG_ENABLE();
+       #endif
+
+       /* If the reset source was the bootloader and the key is correct, clear it and jump to the application */
+       if ((MCUSR & (1 << WDRF)) && (MagicBootKey == MAGIC_BOOT_KEY))
+         JumpToApplication |= true;
+
+       /* If a request has been made to jump to the user application, honor it */
+       if (JumpToApplication)
+       {
+               /* Turn off the watchdog */
+               MCUSR &= ~(1<<WDRF);
+               wdt_disable(); 
+
+               /* Clear the boot key and jump to the user application */
+               MagicBootKey = 0;
+
+               // cppcheck-suppress constStatement
+               ((void (*)(void))0x0000)();
+       }
+}

 
 /** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
  *  runs the bootloader processing routine until instructed to soft-exit, or hard-reset via the watchdog to start
 
 /** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
  *  runs the bootloader processing routine until instructed to soft-exit, or hard-reset via the watchdog to start


@@ -80,6 +129,9 @@ int main(void)
 
        /* Disconnect from the host - USB interface will be reset later along with the AVR */
        USB_Detach();
 
        /* Disconnect from the host - USB interface will be reset later along with the AVR */
        USB_Detach();

+       
+       /* Unlock the forced application start mode of the bootloader if it is restarted */
+       MagicBootKey = MAGIC_BOOT_KEY;

 
        /* Enable the watchdog and force a timeout to reset the AVR */
        wdt_enable(WDTO_250MS);
 
        /* Enable the watchdog and force a timeout to reset the AVR */
        wdt_enable(WDTO_250MS);


@@ -122,17 +174,12 @@ ISR(TIMER1_OVF_vect, ISR_BLOCK)
 void EVENT_USB_Device_ConfigurationChanged(void)
 {
        /* Setup CDC Notification, Rx and Tx Endpoints */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {
        /* Setup CDC Notification, Rx and Tx Endpoints */

-       Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,
-                                  ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
-                                  ENDPOINT_BANK_SINGLE);
+       Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT,
+                                  CDC_NOTIFICATION_EPSIZE, 1);

 
 

-       Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,
-                                  ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
-                                  ENDPOINT_BANK_SINGLE);
+       Endpoint_ConfigureEndpoint(CDC_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);

 
 

-       Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,
-                                  ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
-                                  ENDPOINT_BANK_SINGLE);
+       Endpoint_ConfigureEndpoint(CDC_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);

 }
 
 /** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
 }
 
 /** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to


@@ -303,7 +350,7 @@ static void ReadWriteMemoryBlock(const uint8_t Command)
 static uint8_t FetchNextCommandByte(void)
 {
        /* Select the OUT endpoint so that the next data byte can be read */
 static uint8_t FetchNextCommandByte(void)
 {
        /* Select the OUT endpoint so that the next data byte can be read */

-       Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+       Endpoint_SelectEndpoint(CDC_RX_EPADDR);

 
        /* If OUT endpoint empty, clear it and wait for the next packet from the host */
        while (!(Endpoint_IsReadWriteAllowed()))
 
        /* If OUT endpoint empty, clear it and wait for the next packet from the host */
        while (!(Endpoint_IsReadWriteAllowed()))


@@ -329,7 +376,7 @@ static uint8_t FetchNextCommandByte(void)
 static void WriteNextResponseByte(const uint8_t Response)
 {
        /* Select the IN endpoint so that the next data byte can be written */
 static void WriteNextResponseByte(const uint8_t Response)
 {
        /* Select the IN endpoint so that the next data byte can be written */

-       Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+       Endpoint_SelectEndpoint(CDC_TX_EPADDR);

 
        /* If IN endpoint full, clear it and wait until ready for the next packet to the host */
        if (!(Endpoint_IsReadWriteAllowed()))
 
        /* If IN endpoint full, clear it and wait until ready for the next packet to the host */
        if (!(Endpoint_IsReadWriteAllowed()))


@@ -353,7 +400,7 @@ static void WriteNextResponseByte(const uint8_t Response)
 static void CDC_Task(void)
 {
        /* Select the OUT endpoint */
 static void CDC_Task(void)
 {
        /* Select the OUT endpoint */

-       Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+       Endpoint_SelectEndpoint(CDC_RX_EPADDR);

 
        /* Check if endpoint has a command in it sent from the host */
        if (!(Endpoint_IsOUTReceived()))
 
        /* Check if endpoint has a command in it sent from the host */
        if (!(Endpoint_IsOUTReceived()))


@@ -426,7 +473,7 @@ static void CDC_Task(void)
        else if (Command == 'e')
        {
                /* Clear the application section of flash */
        else if (Command == 'e')
        {
                /* Clear the application section of flash */

-               for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)
+               for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < (uint32_t)BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)

                {
                        boot_page_erase(CurrFlashAddress);
                        boot_spm_busy_wait();
                {
                        boot_page_erase(CurrFlashAddress);
                        boot_spm_busy_wait();


@@ -549,7 +596,7 @@ static void CDC_Task(void)
        }
 
        /* Select the IN endpoint */
        }
 
        /* Select the IN endpoint */

-       Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+       Endpoint_SelectEndpoint(CDC_TX_EPADDR);

 
        /* Remember if the endpoint is completely full before clearing it */
        bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
 
        /* Remember if the endpoint is completely full before clearing it */
        bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());


@@ -577,7 +624,7 @@ static void CDC_Task(void)
        }
 
        /* Select the OUT endpoint */
        }
 
        /* Select the OUT endpoint */

-       Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+       Endpoint_SelectEndpoint(CDC_RX_EPADDR);

 
        /* Acknowledge the command from the host */
        Endpoint_ClearOUT();
 
        /* Acknowledge the command from the host */
        Endpoint_ClearOUT();