Fixing device bricking bug
- When loading a garbage image onto the device, the chip hangs and refuses to jump to the bootloader and start dfu Fix - Check if chip was in locked state and jump to dfu - Check if watchdog timer fired and jump to dfu
This commit is contained in:
Jacob Alexander
parent
8e54672121
commit
2c7542e2e7
@ -20,11 +20,26 @@
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#| You _MUST_ clean the build directory if you change this value
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#|
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set( CHIP
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"mk20dx128vlf5" # McHCK mk20dx128vlf5
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# "mk20dx256vlh7" # Kiibohd-dfu
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"mk20dx128vlf5" # McHCK mk20dx128vlf5
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# "mk20dx256vlh7" # Kiibohd-dfu mk20dx256vlh7
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)
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###
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# Compiler Selection
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#
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#| *** EXPERIMENTAL ***
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#| Stick with gcc unless you know what you're doing
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#| Currently only arm is supported with clang
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set( COMPILER
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"gcc" # arm-none-eabi-gcc / avr-gcc - Default
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# "clang" # arm-none-eabi
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CACHE STRING "Compiler Type" )
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###
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# Bootloader Configuration
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#
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@ -68,7 +68,6 @@ int flash_erase_sector(uintptr_t addr)
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int flash_program_section(uintptr_t addr, size_t num_words)
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{
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GPIOA_PSOR |= (1<<19);
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FTFL.fccob.program_section.fcmd = FTFL_FCMD_PROGRAM_SECTION;
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FTFL.fccob.program_section.addr = addr;
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FTFL.fccob.program_section.num_words = num_words;
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36
Lib/mk20dx.c
36
Lib/mk20dx.c
@ -1,7 +1,7 @@
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/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2013 PJRC.COM, LLC.
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* Modifications by Jacob Alexander 2014
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* Modifications by Jacob Alexander 2014-2015
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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@ -29,6 +29,8 @@
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* SOFTWARE.
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*/
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// ----- Includes -----
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// Local Includes
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#include "mk20dx.h"
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@ -246,7 +248,7 @@ void (* const gVectors[])() =
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portd_isr, // 59 Pin detect (Port D)
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porte_isr, // 60 Pin detect (Port E)
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software_isr, // 61 Software interrupt
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#elif defined(_mk20dx256_)
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#elif defined(_mk20dx256_) || defined(_mk20dx256vlh7_)
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dma_ch0_isr, // 16 DMA channel 0 transfer complete
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dma_ch1_isr, // 17 DMA channel 1 transfer complete
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dma_ch2_isr, // 18 DMA channel 2 transfer complete
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@ -404,7 +406,7 @@ const uint8_t flashconfigbytes[16] = {
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// ----- Functions -----
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#if defined(_mk20dx128vlf5_) && defined(_bootloader_) // Bootloader Section
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#if ( defined(_mk20dx128vlf5_) || defined(_mk20dx256vlh7_) ) && defined(_bootloader_) // Bootloader Section
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__attribute__((noreturn))
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static inline void jump_to_app( uintptr_t addr )
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{
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@ -453,18 +455,20 @@ void *memcpy( void *dst, const void *src, unsigned int len )
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__attribute__ ((section(".startup")))
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void ResetHandler()
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{
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// Disable Watchdog
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WDOG_UNLOCK = WDOG_UNLOCK_SEQ1;
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WDOG_UNLOCK = WDOG_UNLOCK_SEQ2;
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WDOG_STCTRLH = WDOG_STCTRLH_ALLOWUPDATE;
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#if defined(_mk20dx128vlf5_) && defined(_bootloader_) // Bootloader Section
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#if ( defined(_mk20dx128vlf5_) || defined(_mk20dx256vlh7_) ) && defined(_bootloader_) // Bootloader Section
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extern uint32_t _app_rom;
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// We treat _app_rom as pointer to directly read the stack
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// pointer and check for valid app code. This is no fool
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// proof method, but it should help for the first flash.
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if ( RCM_SRS0 & 0x40 || _app_rom == 0xffffffff ||
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//
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// Purposefully disabling the watchdog *after* the reset check this way
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// if the chip goes into an odd state we'll reset to the bootloader (invalid firmware image)
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// RCM_SRS0 & 0x20
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//
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// Also checking for ARM lock-up signal (invalid firmware image)
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// RCM_SRS1 & 0x02
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if ( RCM_SRS0 & 0x40 || RCM_SRS0 & 0x20 || RCM_SRS1 & 0x02 || _app_rom == 0xffffffff ||
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memcmp( (uint8_t*)&VBAT, sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic) ) == 0 ) // Check for soft reload
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{
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memset( (uint8_t*)&VBAT, 0, sizeof(VBAT) );
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@ -476,6 +480,10 @@ void ResetHandler()
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jump_to_app( addr );
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}
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#endif
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// Disable Watchdog
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WDOG_UNLOCK = WDOG_UNLOCK_SEQ1;
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WDOG_UNLOCK = WDOG_UNLOCK_SEQ2;
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WDOG_STCTRLH = WDOG_STCTRLH_ALLOWUPDATE;
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uint32_t *src = (uint32_t*)&_etext;
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uint32_t *dest = (uint32_t*)&_sdata;
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@ -510,7 +518,7 @@ void ResetHandler()
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dest = (uint32_t*)&_sbss;
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while ( dest < (uint32_t*)&_ebss ) *dest++ = 0;
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// MCHCK
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// MCHCK / Kiibohd-dfu
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#if defined(_mk20dx128vlf5_)
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// Default all interrupts to medium priority level
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for ( unsigned int i = 0; i < NVIC_NUM_INTERRUPTS; i++ )
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@ -524,14 +532,12 @@ void ResetHandler()
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// USB Clock and FLL select
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SIM_SOPT2 = SIM_SOPT2_USBSRC | SIM_SOPT2_TRACECLKSEL;
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// Teensy 3.0 and 3.1
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// Teensy 3.0 and 3.1 and Kiibohd-dfu (mk20dx256vlh7)
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#else
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unsigned int i;
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SCB_VTOR = 0; // use vector table in flash
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// default all interrupts to medium priority level
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for ( i = 0; i < NVIC_NUM_INTERRUPTS; i++ )
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for ( unsigned int i = 0; i < NVIC_NUM_INTERRUPTS; i++ )
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{
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NVIC_SET_PRIORITY( i, 128 );
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}
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