From 9b8bc868509f3ec0fffcc85634e43535dc09b421 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sun, 15 Sep 2024 15:07:00 +0800
Subject: Clean ups.

---
 Makefile        | 35 -----------------------------------
 main.c          | 10 ++--------
 openocd-due.cfg |  5 -----
 script.ld       |  4 ++--
 4 files changed, 4 insertions(+), 50 deletions(-)
 delete mode 100644 Makefile

diff --git a/Makefile b/Makefile
deleted file mode 100644
index 846d463..0000000
--- a/Makefile
+++ /dev/null
@@ -1,35 +0,0 @@
-CC = arm-none-eabi-gcc
-CPU = cortex-m3
-TARGET = due
-
-SRC = main.c
-OBJ = $(SRC:.c=.o)
-
-CFLAGS = -std=gnu99
-CFLAGS += -Os
-CFLAGS += -Wall
-CFLAGS += -mcpu=$(CPU)
-CFLAGS += -mthumb
-
-LDFLAGS = -mcpu=$(CPU)
-LDFLAGS += -Wl,--gc-sections
-
-HEX_FLAGS = -O ihex
-HEX_FLAGS += -j .text -j .data
-
-%.o: %.c
-	 $(CC) $(CFLAGS) -c -o $@ $<
-
-elf: $(OBJ)
-	 $(CC) $(LDFLAGS) $(OBJ) -o $(TARGET).elf
-
-hex: elf
-	 arm-none-eabi-objcopy $(HEX_FLAGS) $(TARGET).elf $(TARGET).hex
-
-#upload: hex
-#     openocd -f openocd-due.cfg -c "program $(TARGET) verify reset exit"
-
-.PHONY: clean
-
-clean:
-	 rm *.o *.elf *.hex 
diff --git a/main.c b/main.c
index 71df022..3f00881 100644
--- a/main.c
+++ b/main.c
@@ -38,7 +38,7 @@ int main(void)
 	return 0;
 }
 
-__attribute__((noreturn)) void _rst_handler(void) {
+__attribute__((noreturn)) void _reset(void) {
 	unsigned long *dst, *src;
 	extern unsigned long _sbss, _ebss, _sdata, _edata, _sidata;
 
@@ -49,14 +49,8 @@ __attribute__((noreturn)) void _rst_handler(void) {
 		*dst++ = *src++;
 
 	main();
-
-	for (;;)
-		;
 }
 
 extern const unsigned int _sp;
 
-__attribute__ ((section(".vtor"))) const void* _tab[] = {
-    &_sp,
-    _rst_handler
-};
+__attribute__ ((section(".vtor"))) const void* _tab[] = { &_sp, _reset };
diff --git a/openocd-due.cfg b/openocd-due.cfg
index 8fba185..121a479 100644
--- a/openocd-due.cfg
+++ b/openocd-due.cfg
@@ -1,12 +1,7 @@
 source [find interface/stlink.cfg]
 
-#transport type SWD
 transport select hla_swd
-
-#swd frequency
 adapter speed 1800
-
-#sam3x8e cpuid
 set CPUTAPID 0x2ba01477
 
 source [find target/at91sam3ax_8x.cfg]
diff --git a/script.ld b/script.ld
index 7a67dcf..f2e9b5d 100644
--- a/script.ld
+++ b/script.ld
@@ -4,8 +4,6 @@ MEMORY
 	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
 }
 
-_sp = ORIGIN(ram) + LENGTH(ram);
-
 SECTIONS
 {
 	.text :
@@ -32,3 +30,5 @@ SECTIONS
 		_ebss = . ;
 	} > ram
 }
+
+_sp = ORIGIN(ram) + LENGTH(ram);
-- 
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