Switch to use CMake

5 files changed, 60 insertions, 21 deletions

diff --git a/.gitignore b/.gitignore
index 7cf238f..2cbf855 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 *.o
 *.elf
 *.bin
+build/
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..ee1147f
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,58 @@
+cmake_minimum_required(VERSION 3.10)
+project (ch537)
+
+set (CMAKE_SYSTEM_NAME Generic) # Configure for Bare Metal.
+set (CMAKE_SYSTEM_PROCESSOR riscv32)
+
+set (TC_PREFIX riscv32-unknown-elf-)
+# set (CMAKE_VERBOSE_MAKEFILE ON)
+
+include_directories(include linker)
+
+file (GLOB SOURCES "src/*.c")
+file (GLOB LINKER_SCRIPT "linker/*.ld")
+
+file (REAL_PATH "ch-flash/" CH_FLASH_DIR)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_C_FLAGS "-march=rv32imac -mabi=ilp32 -lgcc -static -nostartfiles -O -std=gnu99" CACHE INTERNAL "C Compiler options")
+set(CMAKE_EXE_LINKER_FLAGS "--cref -static -T ${LINKER_SCRIPT}" CACHE INTERNAL "Linker options")
+
+set (CMAKE_C_COMPILER ${TC_PREFIX}gcc CACHE INTERNAL "C Compiler")
+set (CMAKE_OBJCOPY ${TC_PREFIX}objcopy CACHE INTERNAL "Object Copier")
+set (CMAKE_EXE_LINKER_FLAGS_RELEASE "" CACHE INTERNAL "Linker options for release build type")
+
+set (CMAKE_C_LINK_EXECUTABLE "${TC_PREFIX}ld <LINK_FLAGS> <OBJECTS> -o <TARGET>")
+add_executable(main.elf ${SOURCES})
+set_target_properties(main.elf PROPERTIES
+    LINK_FLAGS "--nostdlib -e 0")
+
+# Generates the binary with objcopy.
+add_custom_command(
+    OUTPUT main.bin
+    DEPENDS main.elf
+    COMMENT "objcopy -O binary main.elf main.bin"
+    COMMAND ${CMAKE_OBJCOPY} ARGS -O binary main.elf main.bin
+)
+add_custom_command(
+    OUTPUT objdump.txt
+    DEPENDS main.elf
+    COMMAND ${TC_PREFIX}objdump -D main.elf > objdump.txt
+)
+add_custom_target(main_bin ALL DEPENDS main.bin objdump.txt)
+
+# generates the flash binary
+add_custom_command(
+  OUTPUT ${CH_FLASH_DIR}/ch-flash
+  COMMAND cd ${CH_FLASH_DIR} && make
+)
+
+add_custom_target(
+  flash
+  DEPENDS main.bin ch-flash/ch-flash
+  COMMAND ${CH_FLASH_DIR}/ch-flash -f main.bin
+)
+
+# add_custom_target(
+#   debug
+#   COMMAND "${TC_PREFIX}gdb" -tui -ex "tar ext :3333" -ex "file main.elf")
diff --git a/Makefile b/Makefile
deleted file mode 100644
index ce65816..0000000
--- a/Makefile
+++ /dev/null
@@ -1,20 +0,0 @@
-CC=riscv32-unknown-elf-gcc
-LD=riscv32-unknown-elf-ld
-CPY=riscv32-unknown-elf-objcopy
-
-all: blinky.bin
-
-blinky.bin: blinky.elf
-	$(CPY) -O binary blinky.elf blinky.bin
-
-blinky.o: blinky.c
-	$(CC) -Os -lgcc -static -nostartfiles -o blinky.o -c blinky.c
-
-blinky.elf: blinky.o ls.ld
-	$(LD) --cref -static -T ls.ld -o blinky.elf blinky.o
-
-flash: all
-	sudo ~/Projects/isp55e0/isp55e0 -f blinky.bin
-
-clean:
-	rm -rf *.o *.elf *.bin
diff --git a/ls.ld b/linker/ls.ld
index dbac92b..dbac92b 100644
--- a/ls.ld
+++ b/linker/ls.ld
diff --git a/blinky.c b/src/blinky.c
index 001e185..ca93df6 100644
--- a/blinky.c
+++ b/src/blinky.c
@@ -85,6 +85,6 @@ __attribute((naked)) void on_reset(void)
 
 void delay(void)
 {
-  for (volatile uint32_t i = 0; i < 20000; ++i)
+  for (volatile uint32_t i = 0; i < 10000; ++i)
     ;
 }