commit 9a85f431e72420a3bce50d333d1fb8bc15671bfd
Author: Henry Wilson <m3henry@googlemail.com>
Date: Fri, 2 Feb 2018 01:18:04 +0000
initial commit
Diffstat:
9 files changed, 177 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,5 @@
+*.o
+*.d
+
+*.elf
+*.hex
diff --git a/README.md b/README.md
@@ -0,0 +1,7 @@
+## AVR-???
+
+So far this is just a playground
+
+- [x] Super cool makefile
+- [x] Uses C++17
+- [ ] Everything else???
diff --git a/binary.s b/binary.s
@@ -0,0 +1,15 @@
+.macro usefile name:req file:req
+.section .text.\name
+
+.global \name\()_size
+.global \name\()_begin
+.global \name\()_end
+
+\name\()_size:
+ .short \name\()_end - \name\()_begin
+\name\()_begin:
+ .incbin "\file"
+\name\()_end:
+.endm
+
+ usefile pi "pi.txt"
diff --git a/io.h b/io.h
@@ -0,0 +1,69 @@
+#pragma once
+#include <inttypes.h>
+
+template <typename T = uint8_t>
+constexpr T volatile& memory(uintptr_t addr)
+{
+ return *reinterpret_cast<T*>(addr);
+}
+
+namespace io
+{
+namespace pin
+{
+ constexpr auto& A()
+ {
+ return memory(0x20);
+ }
+ constexpr auto& B()
+ {
+ return memory(0x23);
+ }
+ constexpr auto& C()
+ {
+ return memory(0x26);
+ }
+ constexpr auto& D()
+ {
+ return memory(0x29);
+ }
+}
+namespace direction
+{
+ constexpr auto& A()
+ {
+ return memory(0x21);
+ }
+ constexpr auto& B()
+ {
+ return memory(0x24);
+ }
+ constexpr auto& C()
+ {
+ return memory(0x27);
+ }
+ constexpr auto& D()
+ {
+ return memory(0x2A);
+ }
+}
+namespace out
+{
+ constexpr auto& A()
+ {
+ return memory(0x22);
+ }
+ constexpr auto& B()
+ {
+ return memory(0x25);
+ }
+ constexpr auto& C()
+ {
+ return memory(0x28);
+ }
+ constexpr auto& D()
+ {
+ return memory(0x2B);
+ }
+}
+}
diff --git a/led-test.cpp b/led-test.cpp
@@ -0,0 +1,13 @@
+#include "led.h"
+#include "io.h"
+#include <util/delay.h>
+
+int main(void)
+{
+ io::direction::B() |= 0x80;
+ for(;;)
+ {
+ blink();
+ _delay_ms(333);
+ }
+}
diff --git a/led.cpp b/led.cpp
@@ -0,0 +1,7 @@
+#include "led.h"
+#include "io.h"
+
+void blink(void)
+{
+ io::pin::B() |= 0x80;
+}
diff --git a/led.h b/led.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void blink();
diff --git a/makefile b/makefile
@@ -0,0 +1,57 @@
+CC = avr-gcc
+CFLAGS = -Os -DF_CPU=12000000 -flto
+CPPFLAGS = -std=c++17
+TARGET_ARCH = -mmcu=atmega644p
+
+DEPFLAGS = -MT $@ -MMD -MP -MF .$*.d
+
+COMPILE.c = $(CC) $(DEPFLAGS) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
+
+# Create our phony targets to avoid files interfering
+.PHONY: clean install
+
+# Generate a list of sources and objects
+C_SOURCES = $(wildcard *.c)
+CPP_SOURCES = $(wildcard *.cpp)
+ASM_SOURCES = $(wildcard *.s)
+OBJECTS = $(C_SOURCES:%.c=.%.o) $(CPP_SOURCES:%.cpp=.%.o) $(ASM_SOURCES:%.s=.%.o)
+
+program.hex: program.elf
+ @ avr-objcopy -O ihex program.elf program.hex
+
+# The final target, with dependancies generated from the sources list
+program.elf: $(OBJECTS)
+ @ $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -Wl,--gc-sections -o $@ $^
+
+# The install target
+install: program.hex
+ @ avrdude -c usbasp -p m644p -U $<
+
+# Clean up everything that we generate
+clean:
+ @ rm -f program.hex program.elf .*.o .*.d
+
+# Delete the built-in rules for building object files from .c files...
+%.o : %.c
+# ...so that our rule is used instead.
+.%.o : %.c .%.d makefile
+ @ $(COMPILE.c) $(OUTPUT_OPTION) $<
+
+%.o : %.cpp
+.%.o : %.cpp .%.d makefile
+ @ $(COMPILE.c) $(OUTPUT_OPTION) $<
+
+%.o : %.s
+.%.o : %.s .%.d makefile
+ @ avr-as --MD .$*.d -c -o $@ $<
+
+# Create a pattern rule with an empty recipe, so that
+# `make` won’t fail if the dependency file doesn’t exist.
+.%.d: ;
+
+# Mark the dependency files precious, so they won’t be
+# automatically deleted as intermediate files.
+.PRECIOUS: .%.d
+
+# Include all of the dependency files
+include $(wildcard .*.d)
diff --git a/pi.txt b/pi.txt
@@ -0,0 +1 @@
+pi = 3.14126979
