mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-11-24 09:27:36 +06:00
0d222db31f
- watchdog is timed out before disabling it by mbed startup - old booloader disable watchdog while new(2015/01) doesn't
84 lines
2.6 KiB
Plaintext
84 lines
2.6 KiB
Plaintext
mbed fix for Infinity
|
|
=====================
|
|
Without linker script patch it doesn't place vector table in final binary.
|
|
And clock is configured to 48MHz using internal clock reference and FLL multiplication.
|
|
|
|
|
|
mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/system_MK20D5.c
|
|
Fix SystemInit: clock setup for internal clock. Inifinity has no external Xtal.
|
|
|
|
mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/cmsis_nvic.c
|
|
Fix NVIC vector address of firmware 0x1000 instead of 0x0
|
|
|
|
mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/TOOLCHAIN_GCC_ARM/MK20D5.ld
|
|
Fix memory map for Infinity bootloader
|
|
Flash starts at 0x1000
|
|
No flash config bytes sector
|
|
|
|
USBDevice/USBDevice/USBHAL_KL25Z.cpp
|
|
Fix USB clock setup, see below.
|
|
|
|
|
|
2015/01/04 Based on mbed-sdk @2f63fa7d78a26.
|
|
|
|
|
|
|
|
Kinetis USB config
|
|
==================
|
|
Clock source: Internal reference clock wth FLL
|
|
SIM_SOPT[USBSRC] = 1(MCGPLLCLK/MCGFLLCLK)
|
|
SIM_SOPT[PLLSEL] = 0(MCGFLLCLK)
|
|
|
|
Clock dividor:
|
|
SIM_CLKDIV2[USBDIV] = 0
|
|
SIM_CLKDIV2[USBFAC] = 0
|
|
|
|
Clock enable:
|
|
SIM_SCGC4[USBOTG] = 1
|
|
|
|
|
|
|
|
Infinity bootloader change
|
|
==========================
|
|
After @2c7542e(2015/01) Infinity bootloader doesn't disable watchdog timer and keyboard firmware has to do it itself. mbed disables watchdog in startup sequence but unfortunately timer is timed out bofore that.
|
|
|
|
We have to do that in earlier phase of mbed startup sequence.
|
|
|
|
|
|
mbed starup sequence files:
|
|
mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/TOOLCHAIN_GCC_ARM/startup_M20D5.s
|
|
mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/system_MK20D5.c
|
|
|
|
Infinity booloader change commit:
|
|
https://github.com/kiibohd/controller/commit/2c7542e2e7f0b8a99edf563dc53164fe1a439483
|
|
|
|
discussion:
|
|
https://geekhack.org/index.php?topic=41989.msg1686616#msg1686616
|
|
|
|
|
|
WORKAROUND
|
|
----------
|
|
Call SystemInit early in Reset_Handler.
|
|
|
|
$ diff -u ../../mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/TOOLCHAIN_GCC_ARM/startup_MK20D5.s mbed-infinity
|
|
--- ../../mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_K20D50M/TOOLCHAIN_GCC_ARM/startup_MK20D5.s 2015-03-22 10:33:22.779866000 +0900
|
|
+++ mbed-infinity/startup_MK20D5.s 2015-03-22 10:32:56.483866000 +0900
|
|
@@ -147,6 +147,8 @@
|
|
* __etext: End of code section, i.e., begin of data sections to copy from.
|
|
* __data_start__/__data_end__: RAM address range that data should be
|
|
* copied to. Both must be aligned to 4 bytes boundary. */
|
|
+ ldr r0, =SystemInit
|
|
+ blx r0
|
|
|
|
ldr r1, =__etext
|
|
ldr r2, =__data_start__
|
|
@@ -161,8 +163,6 @@
|
|
|
|
.Lflash_to_ram_loop_end:
|
|
|
|
- ldr r0, =SystemInit
|
|
- blx r0
|
|
ldr r0, =_start
|
|
bx r0
|
|
.pool
|