From 64be5c97aab4a9d9e9055979b22108f355e9ce0d Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Thu, 12 Sep 2024 13:25:05 +0800
Subject: Clean up code.

---
 main.c    | 31 +++++++++++++++----------------
 script.ld | 18 +++---------------
 2 files changed, 18 insertions(+), 31 deletions(-)

diff --git a/main.c b/main.c
index 9f05a53..2ad2e86 100644
--- a/main.c
+++ b/main.c
@@ -14,30 +14,23 @@
 
 #define PIO_WPKEY 0x50494Fu
 
-#define PMC_PID          13
-#define PMC_WPKEY 0x504D43u
-
-#define PMC_WPMR  *((volatile unsigned int *)(PORT + 0x400E06E4u))
-#define PMC_PCER0 *((volatile unsigned int *)(PORT + 0x400E0610u))
-
-#define GPIO_NUM                 1
-#define GPIO_MASK (1u << GPIO_NUM)
+#define LED_PIN 1
 
 int main(void)
 {
 	volatile int i;
 
 	PIO_WPMR = PIO_WPKEY << 8;
-	PIO_PER  |= GPIO_MASK;
-	PIO_OER  |= GPIO_MASK;
-	PIO_PUDR |= GPIO_MASK;
+	PIO_PER  |= (1 << LED_PIN);
+	PIO_OER  |= (1 << LED_PIN);
+	PIO_PUDR |= (1 << LED_PIN);
 	PIO_WPMR = (PIO_WPKEY << 8) | 1u;
 	
 	for (;;) {
-		PIO_SODR |= GPIO_MASK;
+		PIO_SODR |= (1 << LED_PIN);
 		for (i = 0; i < 100000; i++)
 			;		
-		PIO_CODR |= GPIO_MASK;
+		PIO_CODR |= (1 << LED_PIN);
 		for (i = 0; i < 100000; i++)
 			;		
 	}		
@@ -45,10 +38,16 @@ int main(void)
 	return 0;
 }
 
+__attribute__ ((noreturn)) void reset_handler(void)
+{
+	main();
+	for(;;)
+		;
+}
+
 extern const unsigned int sp;
 
-__attribute__ ((section(".vtor")))
-const void* VectorTable[] = {
+__attribute__ ((section(".vtor"))) const void* tab[] = {
     &sp,
-    main
+    reset_handler
 };
diff --git a/script.ld b/script.ld
index 24129f5..a063ffe 100644
--- a/script.ld
+++ b/script.ld
@@ -1,33 +1,23 @@
-ENTRY(main)
-
 MEMORY
 {
 	rom (rx)  : ORIGIN = 0x00080000, LENGTH = 512K
-	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 96K
 }
 
+sp = ORIGIN(ram) + LENGTH(ram);
+
 SECTIONS
 {
 	.text :
 	{
 		KEEP(*(.vtor))
-
 		*(.text*)
 		*(.rodata*)
-
-		. = ALIGN(4);
-		__end_of_text__ = .;
 	} > rom
 
 	.data :
 	{
-		__data_start_src__ = __end_of_text__;
-		__data_start__ = .;
-
 		*(.data*)
-
-		. = ALIGN(4);
-		__data_end__ = .;
 	} > ram AT >rom
 
 	.bss (NOLOAD) :
@@ -37,6 +27,4 @@ SECTIONS
 		*(COMMON)
 		__bss_end__ = . ;
 	} > ram
-
-	sp = ORIGIN(ram) + LENGTH(ram);
 }
-- 
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