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Move STM32 bootloader address config to separate .h file.

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This commit is contained in:
flabbergast 2015-10-05 10:23:31 +01:00
parent 438559f11d
commit 88c053f78e
6 changed files with 51 additions and 31 deletions
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12
keyboard/chibi_onekey/Makefile
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@ -37,12 +37,16 @@ MCU_STARTUP = stm32f0xx
BOARD = ST_STM32F072B_DISCOVERY
# ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
ARMV = 6
# If you want to be able to jump to bootloader from firmware (on STM32 MCUs),
# set the correct BOOTLOADER_ADDRESS here. Otherwise leave commented out.
# If you want to be able to jump to bootloader from firmware on STM32 MCUs,
# set the correct BOOTLOADER_ADDRESS. Either set it here, or define it in
# ./bootloader_defs.h or in ./boards/<FOO>/bootloader_defs.h (if you have
# a custom board definition that you plan to reuse).
# If you're not setting it here, leave it commented out.
# It is chip dependent, the correct number can be looked up here (page 175):
# http://www.st.com/web/en/resource/technical/document/application_note/CD00167594.pdf
# This also requires a patch to chibios: <tmk_dir>/tmk_core/
BOOTLOADER_ADDRESS = 0x1FFFC800
# This also requires a patch to chibios:
# <tmk_dir>/tmk_core/tool/chibios/ch-bootloader-jump.patch
#STM32_BOOTLOADER_ADDRESS = 0x1FFFC800
# Build Options
# comment out to disable the options.

7
keyboard/chibi_onekey/bootloader_defs.h Normal file
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@ -0,0 +1,7 @@
/* Address for jumping to bootloader on STM32 chips. */
/* It is chip dependent, the correct number can be looked up here (page 175):
* http://www.st.com/web/en/resource/technical/document/application_note/CD00167594.pdf
* This also requires a patch to chibios:
* <tmk_dir>/tmk_core/tool/chibios/ch-bootloader-jump.patch
*/
#define STM32_BOOTLOADER_ADDRESS 0x1FFFC800

6
tmk_core/common/chibios/bootloader.c
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@ -2,7 +2,7 @@
#include "ch.h"
#ifdef BOOTLOADER_ADDRESS
#ifdef STM32_BOOTLOADER_ADDRESS
#define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
extern uint32_t __ram0_end__;
@ -10,7 +10,7 @@ void bootloader_jump(void) {
*((unsigned long *)(SYMVAL(__ram0_end__) - 4)) = 0xDEADBEEF; // set magic flag => reset handler will jump into boot loader
NVIC_SystemReset();
}
#else /* BOOTLOADER_ADDRESS */
#else /* STM32_BOOTLOADER_ADDRESS */
void bootloader_jump(void) {}
#endif /* BOOTLOADER_ADDRESS */
#endif /* STM32_BOOTLOADER_ADDRESS */

12
tmk_core/protocol/chibios/README.md
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@ -2,13 +2,13 @@
### Notes
- To use, unpack or symlink [ChibiOS] {currently 3.0.1} to `tmk_core/tool/chibios/chibios`.
- To use, unpack or symlink [ChibiOS] {currently 3.0.2} to `tmk_core/tool/chibios/chibios`.
- For gcc options, inspect `tmk_core/tool/chibios/chibios.mk`. For instance, I enabled `-Wno-missing-field-initializers`, because TMK common bits generated a lot of warnings on that.
Also pay attention to `-O0` (enabled for debugging); for deployment use `-O2`.
- USB string descriptors are messy. I did not find a way to cleanly generate the right structures from actual strings, so the definitions in individual keyboards' `config.h` are ugly as heck.
- There are some random constants left so far, e.g. 5ms sleep between calling `keyboard_task`, or 1.5sec wait for USB init, in `main.c`. There should be no such in `usb_main.c` (the main USB stack). Everything is based on timers/interrupts/kernel scheduling (well except `keyboard_task`), so no periodically called things (again, except `keyboard_task`, which is just how TMK is designed).
- It is easy to add some code for testing (e.g. blink LED, do stuff on button press, etc...) - just create another thread in `main.c`, it will run independently of the keyboard business.
- Jumping to bootloader works, but it is not entirely pleasant, since it is very much MCU dependent. The code is now geared towards STM32 chips and their built-in bootloaders. So, one needs to dig out the right address to jump to, and pass it to the compiler in the `Makefile`. Also, a patch to upstream ChibiOS is needed (supplied), because it `ResetHandler` needs adjusting.
- Jumping to bootloader works, but it is not entirely pleasant, since it is very much MCU dependent. The code is now geared towards STM32 chips and their built-in bootloaders. So, one needs to dig out the right address to jump to, and either pass it to the compiler in the `Makefile`, or better, define it in `<your_kb>/bootloader_defs.h`. Also, a patch to upstream ChibiOS is needed (supplied), because it `ResetHandler` needs adjusting.
- Sleep LED works, but at the moment only on/off, i.e. no breathing.
- The USB stack works pretty completely; however there are bits of other TMK stuff that are not done yet:
@ -28,7 +28,7 @@ Also pay attention to `-O0` (enabled for debugging); for deployment use `-O2`.
### Tried with
- ChibiOS 3.0.1 and ST F072RB DISCOVERY board.
- ChibiOS 3.0.1, 3.0.2 and ST F072RB DISCOVERY board.
- Need to test on other STM32 chips (F3, F4) to make it as much chip-independent as possible.
## STM32-based keyboard design considerations
@ -36,13 +36,13 @@ Also pay attention to `-O0` (enabled for debugging); for deployment use `-O2`.
- STM32F0x2 chips can do crystal-less USB, but they still need a 3.3V voltage regulator.
- The BOOT0 pin should be tied to GND.
- For a hardware way of accessing the in-built DFU bootloader, in addition to the reset button, put another button between the BOOT0 pin and 3V3.
- For breathing the caps lock LED during the suspended state ("sleep LED"), it is desirable to have that LED on a hardware PWM pin (there's usually plenty of those, look for TIMERs in the datasheet).
- For breathing the caps lock LED during the suspended state ("sleep LED"), it is desirable to have that LED on a hardware PWM pin (there's usually plenty of those, look for TIMERs in the datasheet). However this is not strictly necessary, because instead of direct output of a timer to a pin (better of course), it is easy to define timer callbacks in ChibiOS that turn on/off an arbitrary pin.
## ChibiOS-supported MCUs (as of 3.0.1)
## ChibiOS-supported MCUs (as of 3.0.2)
- Pretty much all STM32 chips.
- There is also support for AVR8, but the USB stack is not implemented for them yet, and also the kernel itself takes about 1k of RAM. I think people managed to get ChibiOS running on atmega32[8p/u4] though.
- There is some support for K20 and KL25 Freescale chips (i.e. Teensy 3.0, mchck, FRDM-KL25Z, FRDM-K20D50M), but again, no USB stack yet.
- There is some support for K20x and KL2x Freescale chips (i.e. Teensy 3.0, mchck, FRDM-KL25Z, FRDM-K20D50M), but again, no official USB stack yet. This is being worked on, see the `kinetis` branch of [my ChibiOS fork](https://github.com/flabbergast/ChibiOS). It supports also Teensy LC, 3.1 and FRDM-KL26Z.
- I've seen community support for Nordic NRF51822 (the chip in Adafruit's Bluefruit bluetooth-low-energy boards), but not sure about the extent.

37
tmk_core/tool/chibios/ch-bootloader-jump.patch
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@ -1,8 +1,8 @@
diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
index 38b4513..12a3f39 100644
index 51a79bb..42d07bd 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
+++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
@@ -98,6 +98,13 @@
@@ -105,6 +105,13 @@
#define CRT0_CALL_DESTRUCTORS TRUE
#endif
@ -16,12 +16,12 @@ index 38b4513..12a3f39 100644
/*===========================================================================*/
/* Code section. */
/*===========================================================================*/
@@ -117,6 +124,17 @@
@@ -124,6 +131,17 @@
.thumb_func
.global Reset_Handler
Reset_Handler:
+
+#ifdef BOOTLOADER_ADDRESS
+#ifdef STM32_BOOTLOADER_ADDRESS
+ /* jump to bootloader code */
+ ldr r0, =__ram0_end__-4
+ ldr r1, =MAGIC_BOOTLOADER_NUMBER
@ -29,16 +29,16 @@ index 38b4513..12a3f39 100644
+ str r0, [r0, #0] /* erase stored magic */
+ cmp r2, r1
+ beq Bootloader_Jump
+#endif /* BOOTLOADER_ADDRESS */
+#endif /* STM32_BOOTLOADER_ADDRESS */
+
/* Interrupts are globally masked initially.*/
cpsid i
@@ -230,6 +248,21 @@ endfiniloop:
@@ -242,6 +260,21 @@ endfiniloop:
ldr r1, =__default_exit
bx r1
+#ifdef BOOTLOADER_ADDRESS
+#ifdef STM32_BOOTLOADER_ADDRESS
+/*
+ * Jump-to-bootloader function.
+ */
@ -46,21 +46,21 @@ index 38b4513..12a3f39 100644
+ .align 2
+ .thumb_func
+Bootloader_Jump:
+ ldr r0, =BOOTLOADER_ADDRESS
+ ldr r0, =STM32_BOOTLOADER_ADDRESS
+ ldr r1, [r0, #0]
+ mov sp, r1
+ ldr r0, [r0, #4]
+ bx r0
+#endif /* BOOTLOADER_ADDRESS */
+#endif /* STM32_BOOTLOADER_ADDRESS */
+
#endif
/** @} */
diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
index fcfa4de..2d560da 100644
index 4812a29..dca9f88 100644
--- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
+++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
@@ -133,6 +133,13 @@
@@ -140,6 +140,13 @@
#define CRT0_CPACR_INIT 0x00F00000
#endif
@ -74,11 +74,12 @@ index fcfa4de..2d560da 100644
/*===========================================================================*/
/* Code section. */
/*===========================================================================*/
@@ -157,6 +164,16 @@
@@ -164,6 +171,17 @@
.thumb_func
.global Reset_Handler
Reset_Handler:
+#ifdef BOOTLOADER_ADDRESS
+
+#ifdef STM32_BOOTLOADER_ADDRESS
+ /* jump to bootloader code */
+ ldr r0, =__ram0_end__-4
+ ldr r1, =MAGIC_BOOTLOADER_NUMBER
@ -86,16 +87,16 @@ index fcfa4de..2d560da 100644
+ str r0, [r0, #0] /* erase stored magic */
+ cmp r2, r1
+ beq Bootloader_Jump
+#endif /* BOOTLOADER_ADDRESS */
+#endif /* STM32_BOOTLOADER_ADDRESS */
+
/* Interrupts are globally masked initially.*/
cpsid i
@@ -289,6 +306,21 @@ endfiniloop:
@@ -305,6 +323,21 @@ endfiniloop:
/* Branching to the defined exit handler.*/
b __default_exit
+#ifdef BOOTLOADER_ADDRESS
+#ifdef STM32_BOOTLOADER_ADDRESS
+/*
+ * Jump-to-bootloader function.
+ */
@ -103,12 +104,12 @@ index fcfa4de..2d560da 100644
+ .align 2
+ .thumb_func
+Bootloader_Jump:
+ ldr r0, =BOOTLOADER_ADDRESS
+ ldr r0, =STM32_BOOTLOADER_ADDRESS
+ ldr r1, [r0, #0]
+ mov sp, r1
+ ldr r0, [r0, #4]
+ bx r0
+#endif /* BOOTLOADER_ADDRESS */
+#endif /* STM32_BOOTLOADER_ADDRESS */
+
#endif /* !defined(__DOXYGEN__) */

8
tmk_core/tool/chibios/chibios.mk
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@ -207,6 +207,14 @@ UDEFS = $(OPT_DEFS)
# Define ASM defines here
UADEFS = $(OPT_DEFS)
# bootloader definitions may be used in the startup .s file
ifneq ("$(wildcard $(TARGET_DIR)/bootloader_defs.h)","")
UADEFS += -include $(TARGET_DIR)/bootloader_defs.h
UDEFS += -include $(TARGET_DIR)/bootloader_defs.h
else ifneq ("$(wildcard $(TARGET_DIR)/boards/$(BOARD)/bootloader_defs.h)","")
UADEFS += -include $(TARGET_DIR)/boards/$(BOARD)/bootloader_defs.h
UDEFS += -include $(TARGET_DIR)/boards/$(BOARD)/bootloader_defs.h
endif
# List all user directories here
UINCDIR =