diff options
Diffstat (limited to 'tmk_core/common')
| -rw-r--r-- | tmk_core/common/chibios/bootloader.c | 84 |
1 files changed, 69 insertions, 15 deletions
diff --git a/tmk_core/common/chibios/bootloader.c b/tmk_core/common/chibios/bootloader.c index 4cf5dae7e6..dceeaa6b19 100644 --- a/tmk_core/common/chibios/bootloader.c +++ b/tmk_core/common/chibios/bootloader.c @@ -3,28 +3,82 @@ #include "ch.h" #include "hal.h" -#ifdef STM32_BOOTLOADER_ADDRESS -/* STM32 */ - /* This code should be checked whether it runs correctly on platforms */ -# define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0)) +#define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0)) +#define BOOTLOADER_MAGIC 0xDEADBEEF +#define MAGIC_ADDR (unsigned long *)(SYMVAL(__ram0_end__) - 4) + +#ifndef STM32_BOOTLOADER_DUAL_BANK +# define STM32_BOOTLOADER_DUAL_BANK FALSE +#endif + +#if STM32_BOOTLOADER_DUAL_BANK + +// Need pin definitions +# include "config_common.h" + +# ifndef STM32_BOOTLOADER_DUAL_BANK_GPIO +# error "No STM32_BOOTLOADER_DUAL_BANK_GPIO defined, don't know which pin to toggle" +# endif + +# ifndef STM32_BOOTLOADER_DUAL_BANK_POLARITY +# define STM32_BOOTLOADER_DUAL_BANK_POLARITY 0 +# endif + +# ifndef STM32_BOOTLOADER_DUAL_BANK_DELAY +# define STM32_BOOTLOADER_DUAL_BANK_DELAY 100000 +# endif + +extern uint32_t __ram0_end__; + +# define bootdelay(loopcount) \ + do { \ + for (int i = 0; i < loopcount; ++i) { \ + __asm__ volatile("nop\n\t" \ + "nop\n\t" \ + "nop\n\t"); \ + } \ + } while (0) + +void bootloader_jump(void) { + *MAGIC_ADDR = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader + NVIC_SystemReset(); +} + +void enter_bootloader_mode_if_requested(void) { + unsigned long *check = MAGIC_ADDR; + if (*check == BOOTLOADER_MAGIC) { + *check = 0; + + // For STM32 MCUs with dual-bank flash, and we're incapable of jumping to the bootloader. The first valid flash + // bank is executed unconditionally after a reset, so it doesn't enter DFU unless BOOT0 is high. Instead, we do + // it with hardware...in this case, we pull a GPIO high/low depending on the configuration, connects 3.3V to + // BOOT0's RC charging circuit, lets it charge the capacitor, and issue a system reset. See the QMK discord + // #hardware channel pins for an example circuit. + palSetPadMode(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_MODE_OUTPUT_PUSHPULL); +# if STM32_BOOTLOADER_DUAL_BANK_POLARITY + palSetPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO)); +# else + palClearPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO)); +# endif + + // Wait for a while for the capacitor to charge + bootdelay(STM32_BOOTLOADER_DUAL_BANK_DELAY); + + // Issue a system reset to get the ROM bootloader to execute, with BOOT0 high + NVIC_SystemReset(); + } +} + +#elif defined(STM32_BOOTLOADER_ADDRESS) // STM32_BOOTLOADER_DUAL_BANK + extern uint32_t __ram0_end__; -# define BOOTLOADER_MAGIC 0xDEADBEEF -# define MAGIC_ADDR (unsigned long *)(SYMVAL(__ram0_end__) - 4) -/** \brief Jump to the bootloader - * - * FIXME: needs doc - */ void bootloader_jump(void) { *MAGIC_ADDR = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader NVIC_SystemReset(); } -/** \brief Enter bootloader mode if requested - * - * FIXME: needs doc - */ void enter_bootloader_mode_if_requested(void) { unsigned long *check = MAGIC_ADDR; if (*check == BOOTLOADER_MAGIC) { @@ -41,7 +95,7 @@ void enter_bootloader_mode_if_requested(void) { } } -#elif defined(KL2x) || defined(K20x) /* STM32_BOOTLOADER_ADDRESS */ +#elif defined(KL2x) || defined(K20x) // STM32_BOOTLOADER_DUAL_BANK // STM32_BOOTLOADER_ADDRESS /* Kinetis */ # if defined(KIIBOHD_BOOTLOADER) |