fix(moonlander-revb) fix soft reset to bootloader

keyboards/zsa/moonlander/moonlander.c

@@ -469,3 +469,34 @@ void eeconfig_init_kb(void) { // EEPROM is getting reset!
     eeconfig_update_kb(keyboard_config.raw);
     eeconfig_init_user();
 }
+
+#ifdef BOOTLOADER_CUSTOM
+#define APP_ADDRESS 0x08002000
+__attribute__((weak)) void bootloader_jump(void) {
+    // The ignition bootloader is checking for a high signal on A8 for 100ms when powering on the board.
+    // Setting both A8 and A9 high will charge the capacitor quickly.
+    // Setting A9 low before reset will cause the capacitor to discharge
+    // thus making the bootloder unlikely to trigger twice between power cycles.
+    setPinOutputPushPull(A9);
+    setPinOutputPushPull(A8);
+    writePinHigh(A9);
+    writePinHigh(A8);
+    wait_ms(500);
+    writePinLow(A9);
+
+    NVIC_SystemReset();
+}
+
+__attribute__((weak)) void mcu_reset(void) {
+    // When resetting the MCU, we want to jump to the application.
+    SCB->AIRCR = APP_ADDRESS & 0xFFFF;
+
+    // Set the stack pointer to the applications stack pointer
+    __asm__ volatile("msr msp, %0" ::"g"(*(volatile uint32_t *)APP_ADDRESS));
+
+    // Jump to the application
+    (*(void (**)())(APP_ADDRESS + 4))();
+    while (1)
+        ;
+}
+#endif