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| author | David Phillips <david@yeah.nah.nz> | 2021-02-08 17:11:54 +1300 |
|---|---|---|
| committer | David Phillips <david@yeah.nah.nz> | 2021-02-08 17:11:54 +1300 |
| commit | bd929ae00529139ceb743bd9b3d67dc6f25a83de (patch) | |
| tree | f4294448d15b9993ed591fb1c15521a9438c5a73 | |
| parent | 9f52d6764b66b0492b74daeafc37f622c7fc1100 (diff) | |
| download | altimeter-bd929ae00529139ceb743bd9b3d67dc6f25a83de.tar.xz | |
Add documentation to Makefile
| -rw-r--r-- | Makefile | 26 |
1 files changed, 19 insertions, 7 deletions
@@ -1,7 +1,10 @@ +include config.mk + CC ?= avr-gcc +GDB ?= avr-gdb OBJCOPY ?= avr-objcopy AVRDUDE ?= avrdude -QEMU_AVR ?= qemu-system-avr +QEMU ?= qemu-system-avr MCU ?= atmega32u4 SIM_MCU ?= atmega2560 @@ -17,15 +20,24 @@ $(shell mkdir -p build/{real,sim}) all: build/altimeter_sim.elf build/altimeter.hex +# Run the sim build software in qemu, halted ready for `make gdb` to attach and +# continue. Note that sim build mocks out some hardware components emu: build/altimeter_sim.elf - $(QEMU_AVR) -s -S -nographic -machine mega2560 -bios $< + $(QEMU) -s -S -nographic -machine mega2560 -bios $< +# Attach GDB session to qemu instance started with `make emu` +gdb: + $(GDB) -ex "target remote :1234" + +# Flash AVR software to microcontroller with AVRdude flash: build/altimeter.hex $(AVRDUDE) -F -V -c avr109 -p $(MCU) -P $(PORT) -b 115200 -U flash:w:$< clean: rm -rf build/ +# ELF for real hardware. No mock/sim hardware included (except barometer, +# haven't written that code yet) build/altimeter.elf: \ build/real/barometer_sim.o \ build/real/display_sim.o \ @@ -33,6 +45,10 @@ build/altimeter.elf: \ build/real/util.o $(CC) -o $@ $^ $(LDFLAGS) +# ELF for simulator/emu. Note that whever I/O is required, the *_sim.{o,c} +# versions of each component will provide a mocked interface. This allows for +# operation in QEMU (see `emu` recipe) without requring SPI, I²C and +# peripherals to be emulated. Useful for UI testing and development etc. build/altimeter_sim.elf: \ build/sim/barometer_sim.o \ build/sim/display_sim.o \ @@ -40,9 +56,6 @@ build/altimeter_sim.elf: \ build/sim/util.o $(CC) -o $@ $^ $(SIM_LDFLAGS) -include config.mk - - build/sim/%.o: %.c $(CC) -c -o $@ $^ $(SIM_CFLAGS) @@ -55,5 +68,4 @@ build/%.hex: build/%.elf build/%.elf: $(CC) -o $@ $^ $(CFLAGS) - -.PHONY: all emu flash clean +.PHONY: all emu gdb flash clean |