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-rw-r--r--tmk_core/common/arm_atsam/bootloader.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/tmk_core/common/arm_atsam/bootloader.c b/tmk_core/common/arm_atsam/bootloader.c
new file mode 100644
index 000000000..ba71bfeb0
--- /dev/null
+++ b/tmk_core/common/arm_atsam/bootloader.c
@@ -0,0 +1,51 @@
+/* Copyright 2017 Fred Sundvik
+ *
+ * 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 2 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 "samd51j18a.h"
+#include "md_bootloader.h"
+
+//Set watchdog timer to reset. Directs the bootloader to stay in programming mode.
+void bootloader_jump(void) {
+#ifdef KEYBOARD_massdrop_ctrl
+ //CTRL keyboards released with bootloader version below must use RAM method. Otherwise use WDT method.
+ uint8_t ver_ram_method[] = "v2.18Jun 22 2018 17:28:08"; //The version to match (NULL terminated by compiler)
+ uint8_t *ver_check = ver_ram_method; //Pointer to version match string for traversal
+ uint8_t *ver_rom = (uint8_t *)0x21A0; //Pointer to address in ROM where this specific bootloader version would exist
+
+ while (*ver_check && *ver_rom == *ver_check) { //While there are check version characters to match and bootloader's version matches check's version
+ ver_check++; //Move check version pointer to next character
+ ver_rom++; //Move ROM version pointer to next character
+ }
+
+ if (!*ver_check) { //If check version pointer is NULL, all characters have matched
+ *MAGIC_ADDR = BOOTLOADER_MAGIC; //Set magic number into RAM
+ NVIC_SystemReset(); //Perform system reset
+ while (1) {} //Won't get here
+ }
+#endif
+
+ WDT->CTRLA.bit.ENABLE = 0;
+ while (WDT->SYNCBUSY.bit.ENABLE) {}
+ while (WDT->CTRLA.bit.ENABLE) {}
+ WDT->CONFIG.bit.WINDOW = 0;
+ WDT->CONFIG.bit.PER = 0;
+ WDT->EWCTRL.bit.EWOFFSET = 0;
+ WDT->CTRLA.bit.ENABLE = 1;
+ while (WDT->SYNCBUSY.bit.ENABLE) {}
+ while (!WDT->CTRLA.bit.ENABLE) {}
+ while (1) {} //Wait on timeout
+}