diff options
Diffstat (limited to 'platforms/arm_atsam/bootloaders/md_boot.c')
| -rw-r--r-- | platforms/arm_atsam/bootloaders/md_boot.c | 72 | 
1 files changed, 72 insertions, 0 deletions
| diff --git a/platforms/arm_atsam/bootloaders/md_boot.c b/platforms/arm_atsam/bootloaders/md_boot.c new file mode 100644 index 0000000000..e7508ffe51 --- /dev/null +++ b/platforms/arm_atsam/bootloaders/md_boot.c @@ -0,0 +1,72 @@ +/* Copyright 2017 Fred Sundvik + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program.  If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include "samd51j18a.h" + +#ifdef KEYBOARD_massdrop_ctrl +// WARNING: These are only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support +extern uint32_t _eram; + +#    define BOOTLOADER_MAGIC 0x3B9ACA00 +#    define MAGIC_ADDR (uint32_t *)((intptr_t)(&_eram) - 4) + +// CTRL keyboards released with bootloader version below must use RAM method. Otherwise use WDT method. +void bootloader_jump(void) { +    uint8_t  ver_ram_method[] = "v2.18Jun 22 2018 17:28:08";  // The version to match (NULL terminated by compiler) +    uint8_t *ver_check        = ver_ram_method;               // Pointer to version match string for traversal +    uint8_t *ver_rom          = (uint8_t *)0x21A0;            // Pointer to address in ROM where this specific bootloader version would exist + +    while (*ver_check && *ver_rom == *ver_check) {  // While there are check version characters to match and bootloader's version matches check's version +        ver_check++;                                // Move check version pointer to next character +        ver_rom++;                                  // Move ROM version pointer to next character +    } + +    if (!*ver_check) {                   // If check version pointer is NULL, all characters have matched +        *MAGIC_ADDR = BOOTLOADER_MAGIC;  // Set magic number into RAM +        NVIC_SystemReset();              // Perform system reset + +        while (1) +            ;  // Won't get here +    } +} + +#else + +// Set watchdog timer to reset. Directs the bootloader to stay in programming mode. +void bootloader_jump(void) { +    WDT->CTRLA.bit.ENABLE = 0; + +    while (WDT->SYNCBUSY.bit.ENABLE) +        ; +    while (WDT->CTRLA.bit.ENABLE) +        ; + +    WDT->CONFIG.bit.WINDOW   = 0; +    WDT->CONFIG.bit.PER      = 0; +    WDT->EWCTRL.bit.EWOFFSET = 0; +    WDT->CTRLA.bit.ENABLE    = 1; + +    while (WDT->SYNCBUSY.bit.ENABLE) +        ; +    while (!WDT->CTRLA.bit.ENABLE) +        ; + +    while (1) +        ;  // Wait on timeout +} +#endif | 
