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CTRL keyboard bootloader_jump support

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Adds support for CTRL keyboards to enter bootloader via bootloader_jump()
This commit is contained in:
patrickmt 2018-09-28 22:34:56 -04:00 • committed by Jack Humbert
parent 20a10bd084
commit daf0cc60bf
4 changed files with 38 additions and 15 deletions
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32
tmk_core/common/arm_atsam/bootloader.c
View file

@ -16,25 +16,27 @@
#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)
{
//Keyboards released with certain bootloader can not enter bootloader from app until workaround is created
uint8_t ver_no_jump[] = "v2.18Jun 22 2018 17:28:08";
uint8_t *ver_check = ver_no_jump;
uint8_t *boot_check = (uint8_t *)0x21A0;
while (*ver_check && *boot_check == *ver_check)
{
ver_check++;
boot_check++;
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)
{
//Version match
//Software workaround would go here
return; //No software restart method implemented... must use hardware reset button
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) {}

7
tmk_core/protocol/arm_atsam/md_bootloader.h
View file

@ -7,6 +7,13 @@ extern uint32_t _erom;
#define BOOTLOADER_SERIAL_MAX_SIZE 20 //DO NOT MODIFY!
#ifdef KEYBOARD_massdrop_ctrl
//WARNING: These are only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support
extern uint32_t _eram;
#define BOOTLOADER_MAGIC 0x3B9ACA00
#define MAGIC_ADDR (uint32_t *)(&_eram - 4)
#endif
#ifdef MD_BOOTLOADER
#define MCU_HZ 48000000

11
tmk_core/protocol/arm_atsam/startup.c
View file

@ -28,6 +28,7 @@
*/
#include "samd51.h"
#include "md_bootloader.h"
/* Initialize segments */
extern uint32_t _sfixed;
@ -500,6 +501,16 @@ const DeviceVectors exception_table = {
*/
void Reset_Handler(void)
{
#ifdef KEYBOARD_massdrop_ctrl
/* WARNING: This is only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support */
if (*MAGIC_ADDR == BOOTLOADER_MAGIC) {
/* At this point, the bootloader's memory is initialized properly, so undo the jump to here, then jump back */
*MAGIC_ADDR = 0x00000000; /* Change value to prevent potential bootloader entrance loop */
__set_MSP(0x20008818); /* MSP according to bootloader */
SCB->VTOR = 0x00000000; /* Vector table back to bootloader's */
asm("bx %0"::"r"(0x00001267)); /* Jump past bootloader RCAUSE check using THUMB */
}
#endif
uint32_t *pSrc, *pDest;
/* Initialize the relocate segment */