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authorNick Brassel <nick@tzarc.org>2020-07-17 06:19:18 +1000
committerJames Young <18669334+noroadsleft@users.noreply.github.com>2020-08-29 14:30:02 -0700
commit686a9d35ffe1cf834673be2991d7bf1025423ae6 (patch)
treede978dc8715908b57f5852ca0861aebb53340b17 /tmk_core
parentb0335b273142ead24cb4177893fafdf2fda88810 (diff)
Re-fix the STM32 dual-bank bootloader stuff. (#9738)
* Re-fix the dual-bank bootloader stuff. * Use wait_ms() instead of using nop's for a delay, as ChibiOS is actually running at the time of bootloader jump.
Diffstat (limited to 'tmk_core')
-rw-r--r--tmk_core/common/chibios/bootloader.c46
1 files changed, 15 insertions, 31 deletions
diff --git a/tmk_core/common/chibios/bootloader.c b/tmk_core/common/chibios/bootloader.c
index dceeaa6b19..743448ee18 100644
--- a/tmk_core/common/chibios/bootloader.c
+++ b/tmk_core/common/chibios/bootloader.c
@@ -2,6 +2,7 @@
#include "ch.h"
#include "hal.h"
+#include "wait.h"
/* This code should be checked whether it runs correctly on platforms */
#define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
@@ -31,45 +32,28 @@
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);
+ // 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));
+ 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));
+ 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);
+ // Wait for a while for the capacitor to charge
+ wait_ms(100);
- // Issue a system reset to get the ROM bootloader to execute, with BOOT0 high
- NVIC_SystemReset();
- }
+ // Issue a system reset to get the ROM bootloader to execute, with BOOT0 high
+ NVIC_SystemReset();
}
+void enter_bootloader_mode_if_requested(void) {} // not needed at all, but if anybody attempts to invoke it....
+
#elif defined(STM32_BOOTLOADER_ADDRESS) // STM32_BOOTLOADER_DUAL_BANK
extern uint32_t __ram0_end__;