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blue-pill: fix bootloader.

This commit is contained in:
Kyle Isom 2018-03-07 19:50:01 -08:00
parent 524f860331
commit 5734a63997
10 changed files with 188 additions and 73 deletions
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16
blue-pill/blinky/Makefile
View File

@ -14,10 +14,11 @@ LD := $(ARMTC)-gcc
AS := $(ARMTC)-as AS := $(ARMTC)-as
ARMSIZE := $(ARMTC)-size ARMSIZE := $(ARMTC)-size
OBJCOPY := $(ARMTC)-objcopy OBJCOPY := $(ARMTC)-objcopy
PAGER ?= less
# compiler options # compiler options
CPUFLAGS := -mcpu=cortex-m3 -mthumb -std=c99 CPUFLAGS := -mcpu=cortex-m3 -mthumb -std=c99
CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS) CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS) -g
LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld
LDLIBS := -lc -lnosys LDLIBS := -lc -lnosys
@ -49,10 +50,21 @@ flash: $(BIN)
erase: erase:
st-flash erase st-flash erase
.PHONY: reset
reset:
st-flash reset
.PHONY: install .PHONY: install
install: erase flash install: erase flash reset
.PHONY: clean .PHONY: clean
clean: clean:
rm -f *.o *.bin *.elf *.d *.map rm -f *.o *.bin *.elf *.d *.map
.PHONY: disass
disass: $(ELF)
$(ARMTC)-objdump -D $(ELF) | $(PAGER)
.PHONY: dump
dump: $(ELF)
$(ARMTC)-objcopy -D $(ELF) > $(TARGET).dump

3
blue-pill/blinky/blinky.c
View File

@ -19,11 +19,12 @@ led_on() {
set_pin(GPIO_C, LED_PIN); set_pin(GPIO_C, LED_PIN);
} }
int void
main(void) main(void)
{ {
*RCC |= (1 << 4); /* enable port C clock */ *RCC |= (1 << 4); /* enable port C clock */
output_mode(GPIO_C, LED_PIN, OUTPUT_GPP, OUTPUT_MAX_2MHZ); output_mode(GPIO_C, LED_PIN, OUTPUT_GPP, OUTPUT_MAX_2MHZ);
led_on();
while(1) { while(1) {
led_off(); led_off();

16
blue-pill/blinky/bluepill.ld
View File

@ -1,19 +1,11 @@
/* from https://github.com/satoshinm/pill_blink/ */
MEMORY MEMORY
{ {
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K flash (rx) : ORIGIN = 0x00000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K sram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
} }
EXTERN(vector_table);
ENTRY(reset_handler);
SECTIONS SECTIONS
{ {
.text : { .text : { *(.text*) } > flash
*(.vectors) .bss : { *(.bss*) } > sram
*(.text*)
. = ALIGN(4);
} >rom
} }

32
blue-pill/blinky/startup.s
View File

@ -5,24 +5,32 @@
* TODO: is the IRQv buffer actually needed right now? * TODO: is the IRQv buffer actually needed right now?
*/ */
.cpu cortex-m3
.thumb
.globl vectors .globl vectors
vectors: vectors:
.align 2 .align 2
.long 0x100 /* best guess at stack pointer */ .long 0x20002000 /* best guess at stack pointer */
.long reset_handler /* reset handler */ .long reset_handler /* reset handler */
.long 0 /* NMI handler */ .long hang /* NMI handler */
.long 0 /* hard_fault_handler */ .long hang /* hard_fault_handler */
.long 0 /* memory management handler */ .long hang /* memory management handler */
.long 0 /* bus fault handler */ .long hang /* bus fault handler */
.long 0 /* usage fault handler */ .long hang /* usage fault handler */
.skip 0x20 /* reserved */ .skip 0x20 /* reserved */
.long 0 /* svcall handler */ .long hang /* svcall handler */
.long 0 /* debug handler */ .long hang /* debug handler */
.skip 4 /* reserved */ .skip 4 /* reserved */
.long 0 /* pendsv handler */ .long hang /* pendsv handler */
.long 0 /* systick handler */ .long hang /* systick handler */
.skip 0xf4 /* remaining / IRQ vectors */ .skip 0x100 /* remaining / IRQ vectors */
.globl reset_handler
.thumb_func
hang: b .
.thumb_func
reset_handler: reset_handler:
bl main bl main

32
blue-pill/draugr/startup.s
View File

@ -5,24 +5,32 @@
* TODO: is the IRQv buffer actually needed right now? * TODO: is the IRQv buffer actually needed right now?
*/ */
.cpu cortex-m3
.thumb
.globl vectors .globl vectors
vectors: vectors:
.align 2 .align 2
.long 0x100 /* best guess at stack pointer */ .long 0x20002000 /* best guess at stack pointer */
.long reset_handler /* reset handler */ .long reset_handler /* reset handler */
.long 0 /* NMI handler */ .long hang /* NMI handler */
.long 0 /* hard_fault_handler */ .long hang /* hard_fault_handler */
.long 0 /* memory management handler */ .long hang /* memory management handler */
.long 0 /* bus fault handler */ .long hang /* bus fault handler */
.long 0 /* usage fault handler */ .long hang /* usage fault handler */
.skip 0x20 /* reserved */ .skip 0x20 /* reserved */
.long 0 /* svcall handler */ .long hang /* svcall handler */
.long 0 /* debug handler */ .long hang /* debug handler */
.skip 4 /* reserved */ .skip 4 /* reserved */
.long 0 /* pendsv handler */ .long hang /* pendsv handler */
.long 0 /* systick handler */ .long hang /* systick handler */
.skip 0xf4 /* remaining / IRQ vectors */ .skip 0x100 /* remaining / IRQ vectors */
.globl reset_handler
.thumb_func
hang: b .
.thumb_func
reset_handler: reset_handler:
bl main bl main

16
blue-pill/draugr/stm32f103.ld
View File

@ -1,19 +1,11 @@
/* from https://github.com/satoshinm/pill_blink/ */
MEMORY MEMORY
{ {
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K flash (rx) : ORIGIN = 0x00000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K sram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
} }
EXTERN(vector_table);
ENTRY(reset_handler);
SECTIONS SECTIONS
{ {
.text : { .text : { *(.text*) } > flash
*(.vectors) .bss : { *(.bss*) } > sram
*(.text*)
. = ALIGN(4);
} >rom
} }

35
blue-pill/skeleton/Makefile
View File

@ -1,5 +1,5 @@
# configurables # configurables
OBJS := OBJS := startup.o
TARGET := TARGET :=
OBJS += $(TARGET).o OBJS += $(TARGET).o
@ -9,15 +9,16 @@ BIN := $(TARGET).bin
# toolchain setup # toolchain setup
ARMTC := arm-none-eabi ARMTC := arm-none-eabi
ARMCC := $(ARMTC)-gcc CC := $(ARMTC)-gcc
CC := $(ARMCC) LD := $(ARMTC)-gcc
LD := $(ARMCC) AS := $(ARMTC)-as
ARMSIZE := $(ARMTC)-size ARMSIZE := $(ARMTC)-size
OBJCOPY := $(ARMTC)-objcopy OBJCOPY := $(ARMTC)-objcopy
PAGER ?= less
# compiler options # compiler options
CPUFLAGS := -mcpu=cortex-m3 -mthumb CPUFLAGS := -mcpu=cortex-m3 -mthumb -std=c99
CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS) CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS) -g
LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld
LDLIBS := -lc -lnosys LDLIBS := -lc -lnosys
@ -30,8 +31,13 @@ STARTMEM := 0x8000000
all: $(BIN) all: $(BIN)
$(ELF): $(OBJS) $(ELF): $(OBJS)
$(ARMCC) $(LDFLAGS) -o $@ $(OBJS) $(LDLIBS) $(CC) $(LDFLAGS) -o $@ $(OBJS) $(LDLIBS)
$(ARMSIZE) -A $@ $(ARMSIZE) $@
.PHONY: strip
strip: $(ELF)
$(ARMTC)-strip $(ELF)
$(ARMSIZE) $(ELF)
$(BIN): $(ELF) $(BIN): $(ELF)
$(OBJCOPY) -O binary $< $@ $(OBJCOPY) -O binary $< $@
@ -44,10 +50,21 @@ flash: $(BIN)
erase: erase:
st-flash erase st-flash erase
.PHONY: reset
reset:
st-flash reset
.PHONY: install .PHONY: install
install: erase flash install: erase flash reset
.PHONY: clean .PHONY: clean
clean: clean:
rm -f *.o *.bin *.elf *.d *.map rm -f *.o *.bin *.elf *.d *.map
.PHONY: disass
disass: $(ELF)
$(ARMTC)-objdump -D $(ELF) | $(PAGER)
.PHONY: dump
dump: $(ELF)
$(ARMTC)-objcopy -D $(ELF) > $(TARGET).dump

65
blue-pill/skeleton/bluepill.h Normal file
View File

@ -0,0 +1,65 @@
#ifndef __BLUEPILL_H__
#define __BLUEPILL_H__
#include <stdint.h>
#define PORTA (volatile unsigned int *)0x40010800
#define PORTB (volatile unsigned int *)0x40010c00
#define PORTC (volatile unsigned int *)0x40011000
#define PORTD (volatile unsigned int *)0x40011400
#define PORTE (volatile unsigned int *)0x40011800
#define RCC (volatile unsigned int *)0x40021000
/*
40011000 CRL
40011004 CRH
40011008 IDR
4001100c ODR
40011010 BRR
40011012 LCKR
*/
typedef struct _GPIO {
uint32_t CRL; /* configuration register low */
uint32_t CRH; /* configuration register high */
uint32_t IDR; /* input data register */
uint32_t ODR; /* output data register */
uint32_t BSRR; /* bit set / reset register */
uint16_t BRR; /* reset register */
uint32_t LCKR; /* locking register */
} GPIO;
GPIO *GPIO_A = (GPIO *)PORTA;
GPIO *GPIO_B = (GPIO *)PORTB;
GPIO *GPIO_C = (GPIO *)PORTC;
GPIO *GPIO_D = (GPIO *)PORTD;
GPIO *GPIO_E = (GPIO *)PORTE;
const uint32_t OUTPUT_MAX_2MHZ = 2;
const uint32_t OUTPUT_MAX_10MHZ = 1;
const uint32_t OUTPUT_MAX_50MHZ = 3;
const uint32_t OUTPUT_GPP = 0;
const uint32_t OUTPUT_GOD = 1;
const uint32_t OUTPUT_APP = 2;
const uint32_t OUTPUT_AOD = 3;
void set_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= ((1 << pin) << 16); }
void clear_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= (1 << pin); }
void output_mode(GPIO *gpio, uint32_t pin, uint32_t mode, uint32_t max) {
if (pin > 7) {
pin = ((pin - 8) * 4);
gpio->CRH |= (max << pin);
gpio->CRH |= (mode << (pin + 2));
}
else {
pin *= 4;
gpio->CRL |= (max << pin);
gpio->CRL |= (mode << (pin + 2));
}
}
#endif /* __BLUEPILL_H__ */

16
blue-pill/skeleton/bluepill.ld
View File

@ -1,19 +1,11 @@
# from https://github.com/satoshinm/pill_blink/
MEMORY MEMORY
{ {
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K flash (rx) : ORIGIN = 0x00000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K sram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
} }
EXTERN(vector_table);
ENTRY(reset_handler);
SECTIONS SECTIONS
{ {
.text : { .text : { *(.text*) } > flash
*(.vectors) .bss : { *(.bss*) } > sram
*(.text*)
. = ALIGN(4);
} >rom
} }

28
blue-pill/skeleton/startup.s Normal file
View File

@ -0,0 +1,28 @@
/*
* Startup code for the STM32F103-based blue pill board.
*
* TODO: revisit stack pointer
* TODO: is the IRQv buffer actually needed right now?
*/
.globl vectors
vectors:
.align 2
.long 0x100 /* best guess at stack pointer */
.long reset_handler /* reset handler */
.long 0 /* NMI handler */
.long 0 /* hard_fault_handler */
.long 0 /* memory management handler */
.long 0 /* bus fault handler */
.long 0 /* usage fault handler */
.skip 0x20 /* reserved */
.long 0 /* svcall handler */
.long 0 /* debug handler */
.skip 4 /* reserved */
.long 0 /* pendsv handler */
.long 0 /* systick handler */
.skip 0xf4 /* remaining / IRQ vectors */
.globl reset_handler
reset_handler:
bl main