lpc111x-isp/test/: proof of concept LED-blinking code

lpc111x-isp/test/Makefile

@@ -0,0 +1,26 @@
+PREFIX = arm-linux-gnueabi-
+
+CC = $(PREFIX)gcc
+OBJCOPY = $(PREFIX)objcopy
+OBJDUMP = $(PREFIX)objdump
+
+CFLAGS = -Wall -mcpu=cortex-m0 -march=armv6-m -mthumb \
+	 -nostdlib
+LDFLAGS = -Tlpc1112fxx2xx.lds
+
+OBJS = test.o
+
+.PHONY:	dump clean
+
+test.bin:	test.elf
+		$(OBJCOPY) -j .text -j .data -O binary $< $@ || \
+		    { rm -f $@; exit 1; }
+
+test.elf:	$(OBJS)
+		$(CC) $(CFLAGS) -o $@ $(OBJS) $(LDFLAGS)
+
+dump:		test.elf
+		$(OBJDUMP) -d test.elf
+
+clean:
+		rm -f $(OBJS) test.elf test.bin

lpc111x-isp/test/lpc1112fxx2xx.lds

@@ -0,0 +1,45 @@
+/* http://www.embedds.com/programming-stm32-discovery-using-gnu-tools-linker-script/ */
+
+ENTRY(__init)
+
+MEMORY {
+	RAM(rwx):	ORIGIN = 0x10000000,	LENGTH = 4K
+	FLASH(rx):	ORIGIN = 0x0,		LENGTH = 16K
+}
+
+SECTIONS {
+	.text : {
+		. = ALIGN(4);
+		KEEP(*(.vectors))
+		*(.init)
+		*(.text)
+		*(.text*)
+		*(.rodata)
+		*(.rodata*)
+		. = ALIGN(4);
+	} >FLASH
+
+	_data_flash = .;
+	.data : AT(_data_flash) {
+		. = ALIGN(4);
+		_data_begin = .;
+		*(.data)
+		*(.data*)
+		. = ALIGN(4);
+		_data_end = .;
+	} >RAM
+
+	.bss : {
+		_bss_begin = .;
+		__bss_start__ = _bss_begin;
+		*(.bss)
+		*(.bss.*)
+		*(COMMON)
+		. = ALIGN(4);
+		_bss_end = .;
+		__bss_end__ = _bss_end;
+	} >RAM
+
+	_stack_end = ORIGIN(RAM)+LENGTH(RAM);
+	_neg_stack_end = -_stack_end;
+}

lpc111x-isp/test/test.c

@@ -0,0 +1,69 @@
+/*
+ * Test code for the Tornado CPU board
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+
+
+extern uint32_t _data_flash;
+extern uint32_t _data_begin;
+extern uint32_t _data_end;
+extern uint32_t _bss_end;
+extern uint32_t _stack_end;
+extern uint32_t _neg_stack_end;
+
+
+#define	IOCONFIG	0x40044000
+#define	GPIO_BASE_0	0x50000000
+#define	GPIO0DATA	(GPIO_BASE_0+0x3ffc)
+#define	GPIO0DIR	(GPIO_BASE_0+0x8000)
+
+/* LED is on PIO0_5 */
+
+
+int main(int argc, char **argv)
+{
+	volatile uint32_t *data = (void *) GPIO0DATA;
+	volatile uint32_t *dir = (void *) GPIO0DIR;
+	uint32_t mask = 0;
+	uint32_t loop;
+
+	*dir = 1 << 5;
+
+	while (1) {
+		*data = mask;
+		mask ^= 1 << 5;
+		for (loop = 100000; loop; loop--);
+	}
+}
+
+
+void __attribute__((naked, section(".init"))) __init(void)
+{
+	register uint32_t *t = &_data_begin;
+	register uint32_t *s = &_data_flash;
+
+	while (t != &_data_end)
+		*t++ = *s++;
+	while (t != &_bss_end)
+		*t++ = 0;
+	main(0, NULL);
+}
+
+
+#define	INITIAL_SP	((uint32_t) &_stack_end)
+#define	NEG_INITIAL_SP	((uint32_t) &_neg_stack_end)
+#define	VECTORS		8
+
+
+uint32_t __vectors[VECTORS] __attribute__((section(".vectors"))) = {
+	INITIAL_SP,		/* initial SP value @@@ */
+	VECTORS*4+1,		/* reset */
+	0,			/* NMI */
+	0,			/* HardFault */
+	0,			/* reserved */
+	0,			/* reserved */
+	0,			/* reserved */
+	NEG_INITIAL_SP-(VECTORS*4+1),/* checksum */
+};