STM32F4 Test application: modified to turn a led on early at boot to measure

boot time.

Author: danielinux

Makefile

@@ -7,7 +7,7 @@ AS:=$(CROSS_COMPILE)gcc
 OBJCOPY:=$(CROSS_COMPILE)objcopy
 SIZE:=$(CROSS_COMPILE)size
 BOOT_IMG?=test-app/image.bin
-BOOT0_OFFSET?=0x10000
+BOOT0_OFFSET?=0x20000
 SIGN?=ED25519
 TARGET?=stm32f4
 DEBUG?=0

include/target.h

@@ -6,11 +6,11 @@
  * Ensure that your firmware entry point is
  * at FLASH_AREA_IMAGE_0_OFFSET + 0x100
  */
-#define WOLFBOOT_SECTOR_SIZE			0x1000
-#define WOLFBOOT_PARTITION_SIZE			0x10000
+#define WOLFBOOT_SECTOR_SIZE			0x20000
+#define WOLFBOOT_PARTITION_SIZE			0x20000
 
-#define WOLFBOOT_PARTITION_BOOT_ADDRESS 0x10000
-#define WOLFBOOT_PARTITION_UPDATE_ADDRESS 0x20000
-#define WOLFBOOT_PARTITION_SWAP_ADDRESS 0x30000
+#define WOLFBOOT_PARTITION_BOOT_ADDRESS 0x20000
+#define WOLFBOOT_PARTITION_UPDATE_ADDRESS 0x40000
+#define WOLFBOOT_PARTITION_SWAP_ADDRESS 0x60000
 
 #endif

test-app/Makefile

@@ -3,12 +3,8 @@ CC:=$(CROSS_COMPILE)gcc
 LD:=$(CROSS_COMPILE)gcc
 OBJS:=startup.o main.o timer.o led.o system.o
 TARGET?=none
-
 LSCRIPT:=app.ld
-
 OBJCOPY:=$(CROSS_COMPILE)objcopy
-
-
 CFLAGS:=-mcpu=cortex-m3 -mthumb -g -ggdb -Wall -Wno-main -Wstack-usage=200 -ffreestanding -Wno-unused -nostdlib -DPLATFORM_$(TARGET)
 LDFLAGS:=-T $(LSCRIPT) -Wl,-gc-sections -Wl,-Map=image.map -nostdlib
 
@@ -18,6 +14,12 @@ image.bin: image.elf
 
 image.elf: $(OBJS) $(LSCRIPT)
 	$(LD) $(LDFLAGS) $(OBJS) -o $@
+
+standalone:CFLAGS+=-DPLATFORM_stm32f4
+standalone:LDFLAGS:=-T standalone.ld -Wl,-gc-sections -Wl,-Map=image.map -nostdlib
+
+
+standalone: image.bin
 
 startup.o: startup.c
 

test-app/led.c

@@ -32,24 +32,12 @@
 #define GPIOD_OSPD  (*(volatile uint32_t *)(GPIOD_BASE + 0x08))
 #define GPIOD_PUPD  (*(volatile uint32_t *)(GPIOD_BASE + 0x0c))
 #define GPIOD_ODR   (*(volatile uint32_t *)(GPIOD_BASE + 0x14))
+#define GPIOD_BSRR  (*(volatile uint32_t *)(GPIOD_BASE + 0x18))
 #define GPIOD_AFL   (*(volatile uint32_t *)(GPIOD_BASE + 0x20))
 #define GPIOD_AFH   (*(volatile uint32_t *)(GPIOD_BASE + 0x24))
 #define LED_PIN (15)
-
+#define LED_BOOT_PIN (14)
 #define GPIO_OSPEED_100MHZ (0x03)
-
-
-void led_setup(void)
-{
-    uint32_t reg;
-    AHB1_CLOCK_ER |= GPIOD_AHB1_CLOCK_ER;
-    reg = GPIOD_MODE & ~ (0x03 << (LED_PIN * 2));
-    GPIOD_MODE = reg | (1 << (LED_PIN * 2));
-
-    reg = GPIOD_PUPD & (0x03 <<  (LED_PIN * 2));
-    GPIOD_PUPD = reg | (0x02 << (LED_PIN * 2));
-}
-
 void led_pwm_setup(void)
 {
     uint32_t reg;
@@ -66,6 +54,16 @@ void led_pwm_setup(void)
     /* Alternate function: use high pin */
     reg = GPIOD_AFH & ~(0xf << ((LED_PIN - 8) * 4));
     GPIOD_AFH = reg | (0x2 << ((LED_PIN - 8) * 4));
+}
 
+void boot_led_on(void)
+{
+    uint32_t reg;
+    AHB1_CLOCK_ER |= GPIOD_AHB1_CLOCK_ER;
+    reg = GPIOD_MODE & ~(0x03 << (LED_BOOT_PIN * 2));
+    GPIOD_MODE = reg | (1 << (LED_BOOT_PIN * 2));
+    reg = GPIOD_PUPD & ~(0x03 << (LED_BOOT_PIN * 2));
+    GPIOD_PUPD = reg | (1 << (LED_BOOT_PIN * 2));
+    GPIOD_BSRR |= (1 << LED_BOOT_PIN);
 }
 

test-app/led.h

@@ -5,4 +5,5 @@ void led_on(void);
 void led_off(void);
 void led_toggle(void);
 void led_pwm_setup(void);
+void boot_led_on(void);
 #endif

test-app/main.c

@@ -30,6 +30,7 @@
 #ifdef PLATFORM_stm32f4
 
 void main(void) {
+    boot_led_on();
     flash_set_waitstates();
     clock_config();
     led_pwm_setup();
@@ -76,8 +77,6 @@ void main(void)
 
 #endif
 
-
-
 #ifdef PLATFORM_samr21
 void main(void) {
     asm volatile ("cpsie i");
@@ -86,11 +85,3 @@ void main(void) {
 }
 #endif
 
-#ifdef PLATFORM_lm3s
-void main(void) {
-    asm volatile ("cpsie i");
-    while(1)
-        WFI();
-}
-#endif
-

test-app/standalone.ld

@@ -0,0 +1,41 @@
+MEMORY
+{
+    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x001FF00
+    RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00010000
+}
+
+SECTIONS
+{
+    .text :
+    {
+        _start_text = .;
+        KEEP(*(.isr_vector))
+        *(.text*)
+        *(.rodata*)
+        . = ALIGN(4);
+        _end_text = .;
+    } > FLASH
+
+    _stored_data = .;
+
+    .data : AT (_stored_data)
+    {
+        _start_data = .;
+        KEEP(*(.data*))
+        . = ALIGN(4);
+        _end_data = .;
+    } > RAM
+
+    .bss :
+    {
+        _start_bss = .;
+        *(.bss*)
+        *(COMMON)
+        . = ALIGN(4);
+        _end_bss = .;
+        _end = .;
+    } > RAM
+}
+
+PROVIDE(_start_heap = _end);
+PROVIDE(_end_stack  = ORIGIN(RAM) + LENGTH(RAM));