Solar MPPT Power System - firmware/Makefile

by TylerK

A 30 W solar battery charger with regulated 5 V and 3.3 V rails: an STM32G031 running perturb & observe MPPT and a CC/CV charge state machine, steering a TI LM5175 4-switch buck-boost through a single analog control input. Four-layer KiCad board, schematic and PCB generated from Python, with an electrothermal simulation run against the published board file.

Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

History Download

TylerK Update 20 file(s) fb8969c 1mo ago

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

# Two things can be checked without any STM32 hardware or a CubeMX install,
# and both are checked here:
#
#   make test   -- compile the control layer for the HOST and run it against a
#                  simulated panel, converter and battery, asserting the
#                  properties a charger must have (current limits respected,
#                  voltage ceiling respected, MPPT finds the peak, faults are
#                  detected and recovered from).
#   make arm    -- compile every application source for the real target
#                  (Cortex-M0+) under strict warnings, against a stub main.h
#                  standing in for the one CubeMX generates. Catches type and
#                  signature errors, accidental double-precision maths (this
#                  part has no FPU), and reports the flash/RAM cost.
#
# `make` runs both. Neither produces a flashable image -- that still needs
# CubeMX's startup code, linker script and HAL, per README.md.

CC          ?= gcc
ARMCC       ?= arm-none-eabi-gcc
SRC         := $(wildcard Core/Src/*.c)
APP_SRC     := $(filter-out Core/Src/app_main.c,$(SRC))
WARN        := -Wall -Wextra -Wconversion -Wshadow -Wdouble-promotion
ARMFLAGS    := -std=c11 -Os -mcpu=cortex-m0plus -mthumb -ffreestanding $(WARN) \
               -ICore/Inc -Itest/arm-stub
HOSTFLAGS   := -std=c11 -O1 -g -Wall -Wextra -ICore/Inc -Itest
BUILD       := build

.PHONY: all test arm clean
all: test arm

test: $(BUILD)/harness
	@echo "== host control-loop tests =="
	@./$(BUILD)/harness

$(BUILD)/harness: test/harness.c test/plant.c Core/Src/charge_control.c | $(BUILD)
	$(CC) $(HOSTFLAGS) $^ -o $@ -lm

arm: | $(BUILD)
	@echo "== cross-compile for STM32G031 (Cortex-M0+) =="
	@for f in $(SRC); do \
	  o=$(BUILD)/arm_$$(basename $$f .c).o; \
	  $(ARMCC) -c $(ARMFLAGS) $$f -o $$o || exit 1; \
	done
	@arm-none-eabi-size -t $(BUILD)/arm_*.o
	@if arm-none-eabi-nm $(BUILD)/arm_*.o | grep -qE "__aeabi_(dadd|dsub|dmul|ddiv|f2d)"; then \
	  echo "ERROR: double-precision soft-float pulled in on a part with no FPU"; exit 1; \
	else echo "OK: single-precision only"; fi

$(BUILD):
	@mkdir -p $(BUILD)

clean:
	@rm -rf $(BUILD)