From 4f6973b8500418abf83c2377d09396b8588f7746 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sat, 18 Sep 2021 21:07:30 +0200
Subject: New architecture: lora32u4ii

Very limited support at the moment. No I2C/SPI, no USB bootloader or USB UART.
---
 src/arch/lora32u4ii/Makefile.inc | 121 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 src/arch/lora32u4ii/Makefile.inc

(limited to 'src/arch/lora32u4ii/Makefile.inc')

diff --git a/src/arch/lora32u4ii/Makefile.inc b/src/arch/lora32u4ii/Makefile.inc
new file mode 100644
index 0000000..06ac1f9
--- /dev/null
+++ b/src/arch/lora32u4ii/Makefile.inc
@@ -0,0 +1,121 @@
+# vim:ft=make
+#
+# Copyright 2021 Daniel Friesel
+#
+# SPDX-License-Identifier: BSD-2-Clause
+
+MCU = atmega32u4
+SERIAL_PORT ?= /dev/ttyUSB0
+
+ifdef CONFIG_arch_lora32u4ii_cpufreq
+	cpu_freq = ${CONFIG_arch_lora32u4ii_cpufreq}
+endif
+
+cpu_freq ?= 8000000
+
+COMMON_FLAGS += -Werror=overflow
+COMMON_FLAGS += -mmcu=${MCU} -DMULTIPASS_ARCH_lora32u4ii
+COMMON_FLAGS += -DF_CPU=${cpu_freq}UL
+COMMON_FLAGS += -DMULTIPASS_ARCH_HAS_I2C
+
+ifeq (${stack_usage}, )
+	COMMON_FLAGS += -flto
+endif
+
+CC = avr-gcc
+CXX = avr-g++
+NM = avr-nm
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+
+ARCH_SHORTNAME = avr
+
+ifeq (${aspectc}, 1)
+	CXX = ag++ -r build/repo.acp -v 0 --c_compiler avr-g++ -p . --Xcompiler
+endif
+
+CXX_TARGETS += src/arch/lora32u4ii/arch.cc
+CXX_TARGETS += src/arch/lora32u4ii/driver/gpio.cc
+CXX_TARGETS += src/arch/lora32u4ii/driver/stdout.cc
+
+# Command-line driver selection
+
+ifeq (${timer_s}, 1)
+	CONFIG_arch_lora32u4ii_driver_uptime = y
+endif
+
+# Kconfig driver selection
+
+ifdef CONFIG_arch_lora32u4ii_driver_uptime
+	COMMON_FLAGS += -DTIMER_S
+	CXX_TARGETS += src/arch/lora32u4ii/driver/uptime.cc
+endif
+
+ifeq (${cpu_freq}, 8000000)
+	uart_baud = 19200
+else ifeq (${cpu_freq}, 4000000)
+	uart_baud = 19200
+else ifeq (${cpu_freq}, 2000000)
+	uart_baud = 19200
+else ifeq (${cpu_freq}, 1000000)
+	uart_baud = 9600
+else ifeq (${cpu_freq}, 500000)
+	uart_baud = 4800
+else ifeq (${cpu_freq}, 250000)
+	uart_baud = 2400
+else ifeq (${cpu_freq}, 125000)
+	uart_baud = 1200
+else ifeq (${cpu_freq}, 62500)
+	uart_baud = 300
+else
+	uart_baud = 9600
+endif
+
+COMMON_FLAGS += -DBAUD=${uart_baud}UL
+
+OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o}
+
+%.o : %.cc | include/config.h
+	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
+
+%.o : %.c | include/config.h
+	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
+
+build/system.elf: ${OBJECTS}
+	${QUIET}mkdir -p build
+	${QUIET}${CXX} ${COMMON_FLAGS} ${CXXFLAGS} -Wl,--gc-sections -o $@ ${OBJECTS}
+	${QUIET}avr-size --format=avr --mcu=${MCU} $@
+	${QUIET}test $$(avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Program | grep -o '[0-9.]*%' | cut -d . -f 1) -lt 100
+
+build/system.hex: build/system.elf
+	${QUIET}${OBJCOPY} -O ihex ${@:.hex=.elf} $@
+
+program: build/system.hex
+	${QUIET}avrdude -p ${MCU} -c usbasp -U flash:w:build/system.hex
+
+arch_clean:
+	${QUIET}rm -f ${OBJECTS} build/system.hex
+
+cat:
+	${QUIET}script/cat.py ${SERIAL_PORT} ${uart_baud} ${cpu_freq} 65536
+
+monitor:
+	${QUIET}screen ${SERIAL_PORT} ${uart_baud}
+
+size: build/system.elf
+	${QUIET}avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Program | perl -nE 'if (m{(\d+) bytes \(([0-9.]+%)}) { print("$$1;$$2;") }'
+	${QUIET}avr-size --format=avr --mcu=${MCU} build/system.elf | fgrep Data | perl -nE 'if (m{(\d+) bytes \(([0-9.]+%)}) { print("$$1;$$2;") }'
+	${QUIET}echo
+
+arch_help:
+	@echo "lora32u4ii specific flags:"
+	@echo " SERIAL_PORT = ${SERIAL_PORT}"
+
+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: ${SERIAL_PORT} ${uart_baud}"
+
+.PHONY: arch_clean arch_help arch_info monitor program
-- 
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