add minimal LM4F120H5QR (LM4F120XL Stellaris Launchpad) support

/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#ifndef GPIO_H

#define GPIO_H

extern "C" {

#include "lm4f_cpp_wrapper.h"

}

class GPIO {

	private:

		GPIO(const GPIO &copy);

	public:

		GPIO () {}

		enum Pin : unsigned char {

			pa_0 = 0, pa_1, pa_2, pa_3, pa_4, pa_5, pa_6, pa_7,

			pb_0, pb_1, pb_2, pb_3, pb_4, pb_5, pb_6, pb_7,

			pc_0, pc_1, pc_2, pc_3, pc_4, pc_5, pc_6, pc_7,

			pd_0, pd_1, pd_2, pd_3, pd_4, pd_5, pd_6, pd_7,

			pe_0, pe_1, pe_2, pe_3, pe_4, pe_5, pe_6, pe_7,

			pf_0, pf_1, pf_2, pf_3, pf_4,

			PIN_INVALID

		};

		inline void setup() {

			mp_gpio_setup();

		}

		inline void led_on(unsigned char id) {

			mp_gpio_write(pf_1 + id, 1);

		}

		inline void led_off(unsigned char id) {

			mp_gpio_write(pf_1 + id, 0);

		}

		inline void led_toggle(unsigned char id) {

			mp_gpio_write(pf_1 + id, !mp_gpio_read(pf_1 + id));

		}

		inline void input(unsigned char const pin) {

			mp_gpio_input(pin);

		}

		inline void input(unsigned char const pin, unsigned char const pull) {

		}

		inline void output(unsigned char const pin) {

			mp_gpio_output(pin);

		}

		/*

		inline void output(unsigned char const pin, unsigned char const value) {

		}*/

		inline unsigned int read(unsigned char const pin) {

			return mp_gpio_read(pin);

		}

		inline void write(unsigned char const pin, unsigned char value) {

			mp_gpio_write(pin, value);

		}

};

extern GPIO gpio;

#endif

/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#ifndef STANDARDOUTPUT_H

#define STANDARDOUTPUT_H

#include "object/outputstream.h"

class StandardOutput : public OutputStream {

	private:

		StandardOutput(const StandardOutput &copy);

	public:

		StandardOutput () {}

		void setup();

		virtual void put(char c) override;

};

extern StandardOutput kout;

#endif

/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#ifndef UPTIME_H

#define UPTIME_H

#include <stdint.h>

class Uptime {

	private:

		Uptime(const Uptime &copy);

#ifdef TIMER_S

		uint32_t seconds;

#endif

	public:

#ifdef TIMER_S

		Uptime () : seconds(0) {}

#else

		Uptime () {}

#endif

#ifdef TIMER_S

		inline uint32_t get_s() { return seconds; }

		inline void tick_s() { seconds++; }

#endif

};

extern Uptime uptime;

#endif

/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

void arch_clock_init();

void arch_init_loop();

void mp_uart_setup();

void mp_uart_send_blocking(char c);

void mp_gpio_setup();

void mp_gpio_input(unsigned char const pin);

void mp_gpio_output(unsigned char const pin);

unsigned int mp_gpio_read(unsigned char const pin);

void mp_gpio_write(unsigned char const pin, unsigned char value);

# vim:ft=make

#

# Copyright 2021 Daniel Friesel

#

# SPDX-License-Identifier: BSD-2-Clause

SERIAL_PORT ?= ttyACM0

cpu_freq ?= 80000000

INCLUDES += -Iext/libopencm3/include

COMMON_FLAGS += --static -nostartfiles -g3 -Os -fno-common

COMMON_FLAGS += -ffunction-sections -fdata-sections

COMMON_FLAGS += -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 -DLM4F

CC = arm-none-eabi-gcc

CXX = arm-none-eabi-g++

OBJCOPY = arm-none-eabi-objcopy

OBJDUMP = arm-none-eabi-objdump

SIZE = arm-none-eabi-size

C_TARGETS += src/arch/lm4f120h5qr-stellaris/lm4f_cpp_wrapper.c

CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/arch.cc

ifdef CONFIG_aspectc

	CXX = ag++ -r build/repo.acp -v 0 --c_compiler arm-none-eabi-g++ -p . --Xcompiler

endif

ifneq ($(findstring adc,${arch_drivers}), )

	CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/adc.cc

endif

CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/gpio.cc

CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/stdout.cc

# Commandline

ifneq ($(findstring counter,${arch_drivers}), )

	CONFIG_arch_lm4f120h5qr_stellaris_driver_counter = y

endif

#ifneq ($(findstring timer,${arch_drivers}), )

#	CONFIG_arch_lm4f120h5qr_stellaris_driver_timer = y

#endif

ifeq (${timer_s}, 1)

	CONFIG_arch_lm4f120h5qr_stellaris_driver_uptime = y

endif

# Kconfig

ifdef CONFIG_arch_lm4f120h5qr_stellaris_driver_counter

	CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/counter.cc

endif

#ifdef CONFIG_arch_lm4f120h5qr_stellaris_driver_timer

#	CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/timer.cc

#endif

ifdef CONFIG_arch_lm4f120h5qr_stellaris_driver_uptime

	COMMON_FLAGS += -DTIMER_S

	CXX_TARGETS += src/arch/lm4f120h5qr-stellaris/driver/uptime.cc

endif

ifneq (${cpu_freq}, )

	COMMON_FLAGS += -DF_CPU=${cpu_freq}UL

else

	COMMON_FLAGS += -DF_CPU=80000000UL

endif

OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}

.cc.o:

	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}

.c.o:

	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}

.S.o:

	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}

.s.o:

	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}

ext/libopencm3/Makefile:

	git submodule update --init

ext/libopencm3/lib/libopencm3_lm4f.a: ext/libopencm3/Makefile

	${MAKE} -C ext/libopencm3

build/system.elf: ${OBJECTS} ext/libopencm3/lib/libopencm3_stm32f4.a

	${QUIET}mkdir -p build

	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} \

		-Lext/libopencm3/lib -Wl,--gc-sections \

		-Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group \

		-T src/arch/lm4f120h5qr-stellaris/lm4f120h5qr.ld \

		${OBJECTS} -lopencm3_lm4f \

		-o $@

	${QUIET}${SIZE} build/system.elf | tail -n1 | awk '{ print "  ROM: " ($$1+$$2) " (" int(($$1+$$2)*100/49152) "%)     RAM: " ($$2 + $$3) " (" int(($$2+$$3)*100/4096) "%)" }'

program: build/system.elf

	${OBJCOPY} -O binary build/system.elf build/system.bin

	lm4flash build/system.bin

arch_clean:

	${QUIET}rm -f ${OBJECTS}

cat:

	${QUIET}script/cat.py /dev/${SERIAL_PORT} 115200 ${cpu_freq} 65536

monitor:

	${QUIET}screen /dev/${SERIAL_PORT} 115200

arch_help:

	@echo "lm4f120h5qr-stellaris specific flags:"

arch_info:

	@echo "CPU   Freq: ${cpu_freq} Hz"

	@echo "Timer Freq: ${timer_freq} Hz"

	@echo "I2C   Freq: ${i2c_freq} Hz"

	@echo "Counter Overflow: 65536/255"

	@echo "Monitor: /dev/${SERIAL_PORT} 115200"

attributes: build/system.elf

	${QUIET}script/size.py ${SIZE} text,data data,bss

.PHONY: arch_clean arch_help arch_info attributes cat monitor program