tmk_core/common/chibios/bootloader.c

   1 #include "bootloader.h"
   2
   3 #include "ch.h"
   4 #include "hal.h"
   5
   6 #ifdef STM32_BOOTLOADER_ADDRESS
   7 /* STM32 */
   8
   9 #if defined(STM32F0XX)
  10 /* This code should be checked whether it runs correctly on platforms */
  11 #define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
  12 extern uint32_t __ram0_end__;
  13
  14 void bootloader_jump(void) {
  15   *((unsigned long *)(SYMVAL(__ram0_end__) - 4)) = 0xDEADBEEF; // set magic flag => reset handler will jump into boot loader
  16    NVIC_SystemReset();
  17 }
  18
  19 #else /* defined(STM32F0XX) */
  20 #error Check that the bootloader code works on your platform and add it to bootloader.c!
  21 #endif /* defined(STM32F0XX) */
  22
  23 #elif defined(KL2x) || defined(K20x) /* STM32_BOOTLOADER_ADDRESS */
  24 /* Kinetis */
  25
  26 #if defined(KIIBOHD_BOOTLOADER)
  27 /* Kiibohd Bootloader (MCHCK and Infinity KB) */
  28 #define SCB_AIRCR   (*(volatile uint32_t *)0xE000ED0C) // Application Interrupt and Reset Control
  29 #define VBAT        (*(volatile uint8_t  *)0x4003E000) // VBAT register file (32 bytes)
  30 const uint8_t sys_reset_to_loader_magic[] = "\xff\x00\x7fRESET TO LOADER\x7f\x00\xff";
  31 void bootloader_jump(void) {
  32   __builtin_memcpy((void *)&VBAT, (const void *)sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic));
  33   // request reset
  34   SCB_AIRCR = 0x05FA0004;
  35 }
  36
  37 #else /* defined(KIIBOHD_BOOTLOADER) */
  38 /* Default for Kinetis - expecting an ARM Teensy */
  39 void bootloader_jump(void) {
  40         chThdSleepMilliseconds(100);
  41         __BKPT(0);
  42 }
  43 #endif /* defined(KIIBOHD_BOOTLOADER) */
  44
  45 #else /* neither STM32 nor KINETIS */
  46 void bootloader_jump(void) {}
  47 #endif