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bluepill: start HAL, update skeleton.

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This commit is contained in:
Kyle Isom
2018-03-07 08:06:25 -08:00
parent 4be849722a
commit 899a1813d1
9 changed files with 201 additions and 8 deletions
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2
blue-pill/blinky/Makefile
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@@ -16,7 +16,7 @@ ARMSIZE := $(ARMTC)-size
OBJCOPY := $(ARMTC)-objcopy
# compiler options
CPUFLAGS := -mcpu=cortex-m3 -mthumb
CPUFLAGS := -mcpu=cortex-m3 -mthumb -std=c99
CFLAGS := -Wall -Wextra -Os -MD $(CPUFLAGS)
LDFLAGS := $(CPUFLAGS) -nostartfiles -Wl,-T,bluepill.ld
LDLIBS := -lc -lnosys

13
blue-pill/blinky/blinky.c
View File

@@ -1,5 +1,8 @@
/* based on example from https://github.com/satoshinm/pill_blink */
#include "bluepill.h"
#define LED_PIN 13
static inline void
delay(unsigned long ms)
{
@@ -8,19 +11,17 @@ delay(unsigned long ms)
static inline void
led_off() {
(*(volatile unsigned int *)(0x40011010)) = (1 << 13);
clear_pin(GPIO_C, LED_PIN);
}
static inline void
led_on() {
(*(volatile unsigned int *)(0x40011014)) = (1 << 13);
set_pin(GPIO_C, LED_PIN);
}
void __attribute__ ((weak, naked)) reset_handler(void) {
(*(volatile unsigned int *)(0x40021018)) |= (1 << 4);
(*(volatile unsigned int *)(0x40011004)) |= (0x00 << (((13 - 8) * 4) + 2));
(*(volatile unsigned int *)(0x40011004)) |= (0x02 << ((13 - 8) * 4));
*RCC |= (1 << 4); /* enable port C clock */
output_mode(GPIO_C, LED_PIN, OUTPUT_GPP, OUTPUT_MAX_2MHZ);
while(1) {
led_off();