initial commit

.gitignore

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+/.idea/
+/build/

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.26)
+
+project(avr_blink VERSION 0.1.0.0 LANGUAGES C ASM)
+
+set(CMAKE_C_STANDARD 17)
+
+if(NOT MCU_TYPE)
+    set(MCU_TYPE attiny13a)
+endif()
+
+if(NOT MCU_PROGRAMMER_SPEED)
+    set(MCU_PROGRAMMER_SPEED 256kHz)
+endif()
+
+if(NOT MCU_PROGRAMMER)
+    set(MCU_PROGRAMMER usbasp)
+endif()
+
+if(NOT MCU_PROGRAMMER_PORT)
+    set(MCU_PROGRAMMER_PORT /dev/usb/lp0)
+endif()
+
+set(SOURCE_FILES main.c)
+
+########################################################################################################################
+
+find_program(MCU_CC          avr-gcc     REQUIRED)
+find_program(MCU_CXX         avr-g++     REQUIRED)
+find_program(MCU_UPLOAD_TOOL avrdude     REQUIRED)
+find_program(MCU_OBJCOPY     avr-objcopy REQUIRED)
+find_program(MCU_SIZE        avr-size    REQUIRED)
+find_program(MCU_OBJDUMP     avr-objdump REQUIRED)
+
+set(CMAKE_C_COMPILER   ${MCU_CC})
+set(CMAKE_CXX_COMPILER ${MCU_CXX})
+
+if(DEFINED $ENV{AVR_ROOT_PATH})
+    set(AVR_ROOT_PATH $ENV{AVR_ROOT_PATH})
+else()
+    if(EXISTS "/usr/avr")
+        set(AVR_ROOT_PATH "/usr/avr")
+    elseif(EXISTS "/opt/local/avr")
+        set(AVR_ROOT_PATH "/opt/local/avr")
+    elseif(EXISTS "/usr/lib/avr")
+        set(AVR_ROOT_PATH "/usr/lib/avr")
+    else()
+        message(FATAL_ERROR "Please set AVR_ROOT_PATH in your environment.")
+    endif()
+endif()
+
+set(CMAKE_SYSTEM_INCLUDE_PATH "${AVR_ROOT_PATH}/include")
+set(CMAKE_SYSTEM_LIBRARY_PATH "${AVR_ROOT_PATH}/lib")
+
+########################################################################################################################
+
+set(MCU_FLAGS -c ${MCU_PROGRAMMER} -p ${MCU_TYPE} -P ${MCU_PROGRAMMER_PORT} -B ${MCU_PROGRAMMER_SPEED})
+
+if(NOT CMAKE_BUILD_TYPE OR NOT (CMAKE_BUILD_TYPE MATCHES Release OR CMAKE_BUILD_TYPE MATCHES Debug))
+    set(CMAKE_BUILD_TYPE Debug)
+endif()
+
+if(CMAKE_BUILD_TYPE MATCHES Release)
+    set(CMAKE_C_FLAGS_RELEASE   "-Os")
+    set(CMAKE_CXX_FLAGS_RELEASE "-Os")
+endif()
+
+if(CMAKE_BUILD_TYPE MATCHES Debug)
+    set(CMAKE_C_FLAGS_DEBUG   "-O0 -save-temps -g -gdwarf-3 -gstrict-dwarf")
+    set(CMAKE_CXX_FLAGS_DEBUG "-O0 -save-temps -g -gdwarf-3 -gstrict-dwarf")
+endif()
+
+########################################################################################################################
+
+function(add_mcu_executable EXECUTABLE_NAME)
+    if(NOT ARGN)
+        message(FATAL_ERROR "No source files given for ${EXECUTABLE_NAME}")
+    endif()
+
+    set(elf_file    ${MCU_TYPE}-${EXECUTABLE_NAME}.elf)
+    set(map_file    ${MCU_TYPE}-${EXECUTABLE_NAME}.map)
+    set(hex_file    ${MCU_TYPE}-${EXECUTABLE_NAME}.hex)
+    set(eeprom_file ${MCU_TYPE}-${EXECUTABLE_NAME}-eeprom.hex)
+
+    add_executable(${elf_file} EXCLUDE_FROM_ALL ${ARGN})
+    set_target_properties(${elf_file} PROPERTIES
+            COMPILE_FLAGS "-mmcu=${MCU_TYPE}"
+            LINK_FLAGS    "-mmcu=${MCU_TYPE} -Wl,--gc-sections -mrelax -Wl,-Map,${map_file}")
+
+    add_custom_command(OUTPUT ${hex_file}
+            COMMAND ${MCU_OBJCOPY} -j .text -j .data -O ihex ${elf_file} ${hex_file}
+            DEPENDS ${elf_file})
+
+    add_custom_command(OUTPUT ${eeprom_file}
+            COMMAND ${MCU_OBJCOPY} -j .eeprom --set-section-flags=.eeprom=alloc,load
+            --change-section-lma .eeprom=0 --no-change-warnings
+            -O ihex ${elf_file} ${eeprom_file}
+            DEPENDS ${elf_file})
+
+    add_custom_target(upload_hex
+            ${MCU_UPLOAD_TOOL} ${MCU_FLAGS} -v -U flash:w:${hex_file}
+            DEPENDS ${hex_file})
+
+    add_custom_target(upload_eeprom
+            ${MCU_UPLOAD_TOOL} ${MCU_FLAGS} -v -U eeprom:w:${eeprom_file}
+            DEPENDS ${eeprom_file})
+
+endfunction()
+
+add_mcu_executable(avr_blink main.c)

main.c

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+#include <avr/io.h>
+#include <util/delay.h>
+
+int main(void) {
+#if defined(DDRC) && defined(DDRD)
+#define BITS 8
+    DDRC = 0x3f;
+    DDRD = DDRB = 0xff;
+#else
+#define BITS 6
+    DDRB = 0x3f;
+#endif
+    for (;;) {
+        for (uint8_t i = 0; i < BITS; ++i) {
+#if defined(DDRC) && defined(DDRD)
+            PORTC = (PORTD = PORTB ^= _BV(i))&0x3f;
+#else
+            PORTB ^= _BV(i);
+#endif
+            _delay_ms(36);
+        }
+    }
+    return 0;
+}