Add script reading bootloader flags

[pub/lufa.git] / Bootloaders / HID / BootloaderHID.c

diff --git a/Bootloaders/HID/BootloaderHID.c b/Bootloaders/HID/BootloaderHID.c
index 5081762..8973bd8 100644 (file)
--- a/Bootloaders/HID/BootloaderHID.c
+++ b/Bootloaders/HID/BootloaderHID.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2012.
+     Copyright (C) Dean Camera, 2021.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
-  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2021  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
@@ -58,7 +58,13 @@ void Application_Jump_Check(void)
        /* 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))
        {
+               /* 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)();
        }
@@ -78,6 +84,9 @@ int main(void)
        while (RunBootloader)
          USB_USBTask();
 
+       /* Wait a short time to end all USB transactions and then disconnect */
+       _delay_us(1000);
+
        /* Disconnect from the host - USB interface will be reset later along with the AVR */
        USB_Detach();
 
@@ -97,6 +106,9 @@ static void SetupHardware(void)
        MCUSR &= ~(1 << WDRF);
        wdt_disable();
 
+       /* Disable clock division */
+       clock_prescale_set(clock_div_1);
+
        /* Relocate the interrupt vector table to the bootloader section */
        MCUCR = (1 << IVCE);
        MCUCR = (1 << IVSEL);
@@ -143,6 +155,10 @@ void EVENT_USB_Device_ControlRequest(void)
                        uint16_t PageAddress = Endpoint_Read_16_LE();
                        #endif
 
+                       /* Determine if the given page address is correctly aligned to the
+                          start of a flash page. */
+                       bool PageAddressIsAligned = !(PageAddress & (SPM_PAGESIZE - 1));
+
                        /* Check if the command is a program page command, or a start application command */
                        #if (FLASHEND > 0xFFFF)
                        if ((uint16_t)(PageAddress >> 8) == COMMAND_STARTAPPLICATION)
@@ -152,11 +168,14 @@ void EVENT_USB_Device_ControlRequest(void)
                        {
                                RunBootloader = false;
                        }
-                       else
+                       else if ((PageAddress < BOOT_START_ADDR) && PageAddressIsAligned)
                        {
                                /* Erase the given FLASH page, ready to be programmed */
-                               boot_page_erase(PageAddress);
-                               boot_spm_busy_wait();
+                               ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
+                               {
+                                       boot_page_erase(PageAddress);
+                                       boot_spm_busy_wait();
+                               }
 
                                /* Write each of the FLASH page's bytes in sequence */
                                for (uint8_t PageWord = 0; PageWord < (SPM_PAGESIZE / 2); PageWord++)
@@ -173,8 +192,11 @@ void EVENT_USB_Device_ControlRequest(void)
                                }
 
                                /* Write the filled FLASH page to memory */
-                               boot_page_write(PageAddress);
-                               boot_spm_busy_wait();
+                               ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
+                               {
+                                       boot_page_write(PageAddress);
+                                       boot_spm_busy_wait();
+                               }
 
                                /* Re-enable RWW section */
                                boot_rww_enable();