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-rw-r--r--platforms/chibios/bootloaders/wb32_dfu.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/platforms/chibios/bootloaders/wb32_dfu.c b/platforms/chibios/bootloaders/wb32_dfu.c
new file mode 100644
index 0000000000..70b18f0228
--- /dev/null
+++ b/platforms/chibios/bootloaders/wb32_dfu.c
@@ -0,0 +1,49 @@
+/* Copyright 2021 QMK
+ *
+ * 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 3 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 <ch.h>
+#include <hal.h>
+#include "wait.h"
+
+extern uint32_t __ram0_end__;
+
+/* This code should be checked whether it runs correctly on platforms */
+# define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
+# define BOOTLOADER_MAGIC 0xDEADBEEF
+# define MAGIC_ADDR (unsigned long *)(SYMVAL(__ram0_end__) - 4)
+
+__attribute__((weak)) 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;
+ __set_CONTROL(0);
+ __set_MSP(*(__IO uint32_t *)WB32_BOOTLOADER_ADDRESS);
+ __enable_irq();
+
+ typedef void (*BootJump_t)(void);
+ BootJump_t boot_jump = *(BootJump_t *)(WB32_BOOTLOADER_ADDRESS + 4);
+ boot_jump();
+ while (1)
+ ;
+ }
+}