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lpc111x-isp/test/: proof of concept LED-blinking code
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26
lpc111x-isp/test/Makefile
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26
lpc111x-isp/test/Makefile
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PREFIX = arm-linux-gnueabi-
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CC = $(PREFIX)gcc
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OBJCOPY = $(PREFIX)objcopy
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OBJDUMP = $(PREFIX)objdump
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CFLAGS = -Wall -mcpu=cortex-m0 -march=armv6-m -mthumb \
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-nostdlib
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LDFLAGS = -Tlpc1112fxx2xx.lds
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OBJS = test.o
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.PHONY: dump clean
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test.bin: test.elf
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$(OBJCOPY) -j .text -j .data -O binary $< $@ || \
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{ rm -f $@; exit 1; }
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test.elf: $(OBJS)
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$(CC) $(CFLAGS) -o $@ $(OBJS) $(LDFLAGS)
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dump: test.elf
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$(OBJDUMP) -d test.elf
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clean:
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rm -f $(OBJS) test.elf test.bin
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45
lpc111x-isp/test/lpc1112fxx2xx.lds
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lpc111x-isp/test/lpc1112fxx2xx.lds
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/* http://www.embedds.com/programming-stm32-discovery-using-gnu-tools-linker-script/ */
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ENTRY(__init)
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MEMORY {
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RAM(rwx): ORIGIN = 0x10000000, LENGTH = 4K
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FLASH(rx): ORIGIN = 0x0, LENGTH = 16K
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}
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SECTIONS {
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.text : {
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. = ALIGN(4);
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KEEP(*(.vectors))
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*(.init)
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*(.text)
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*(.text*)
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*(.rodata)
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*(.rodata*)
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. = ALIGN(4);
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} >FLASH
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_data_flash = .;
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.data : AT(_data_flash) {
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. = ALIGN(4);
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_data_begin = .;
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*(.data)
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*(.data*)
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. = ALIGN(4);
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_data_end = .;
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} >RAM
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.bss : {
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_bss_begin = .;
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__bss_start__ = _bss_begin;
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*(.bss)
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*(.bss.*)
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*(COMMON)
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. = ALIGN(4);
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_bss_end = .;
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__bss_end__ = _bss_end;
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} >RAM
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_stack_end = ORIGIN(RAM)+LENGTH(RAM);
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_neg_stack_end = -_stack_end;
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}
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69
lpc111x-isp/test/test.c
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69
lpc111x-isp/test/test.c
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/*
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* Test code for the Tornado CPU board
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*/
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#include <stddef.h>
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#include <stdint.h>
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extern uint32_t _data_flash;
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extern uint32_t _data_begin;
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extern uint32_t _data_end;
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extern uint32_t _bss_end;
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extern uint32_t _stack_end;
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extern uint32_t _neg_stack_end;
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#define IOCONFIG 0x40044000
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#define GPIO_BASE_0 0x50000000
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#define GPIO0DATA (GPIO_BASE_0+0x3ffc)
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#define GPIO0DIR (GPIO_BASE_0+0x8000)
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/* LED is on PIO0_5 */
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int main(int argc, char **argv)
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{
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volatile uint32_t *data = (void *) GPIO0DATA;
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volatile uint32_t *dir = (void *) GPIO0DIR;
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uint32_t mask = 0;
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uint32_t loop;
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*dir = 1 << 5;
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while (1) {
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*data = mask;
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mask ^= 1 << 5;
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for (loop = 100000; loop; loop--);
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}
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}
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void __attribute__((naked, section(".init"))) __init(void)
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{
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register uint32_t *t = &_data_begin;
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register uint32_t *s = &_data_flash;
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while (t != &_data_end)
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*t++ = *s++;
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while (t != &_bss_end)
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*t++ = 0;
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main(0, NULL);
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}
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#define INITIAL_SP ((uint32_t) &_stack_end)
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#define NEG_INITIAL_SP ((uint32_t) &_neg_stack_end)
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#define VECTORS 8
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uint32_t __vectors[VECTORS] __attribute__((section(".vectors"))) = {
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INITIAL_SP, /* initial SP value @@@ */
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VECTORS*4+1, /* reset */
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0, /* NMI */
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0, /* HardFault */
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0, /* reserved */
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0, /* reserved */
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0, /* reserved */
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NEG_INITIAL_SP-(VECTORS*4+1),/* checksum */
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};
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