Add multi-application support

.vscode/launch.json

@@ -5,7 +5,7 @@
             "name": "Launch",
             "type": "cppdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/bin/nrf.elf",
+            "program": "${workspaceFolder}/bin/firmware.elf",
             "args": [],
             "stopAtEntry": true,
             "cwd": "${workspaceFolder}",
@@ -36,7 +36,7 @@
                 },
                 {
                     "description": "Load executable into debugger.",
-                    "text": "file ${workspaceFolder}/bin/nrf.elf",
+                    "text": "file ${workspaceFolder}/bin/firmware.elf",
                     "ignoreFailures": false
                 },
                 {

.vscode/tasks.json

@@ -6,6 +6,8 @@
         "env": {
             "PLATFORM": "nrf52",
             // "PLATFORM": "posix",
+            // "APPLICATION": "blinky",
+            "APPLICATION": "button",
         },
     },
     "tasks": [
@@ -84,4 +86,4 @@
         "panel": "shared",
         "clear": true,
     }
-}
+}

Makefile

@@ -1,21 +1,23 @@
 .DEFAULT_GOAL := all
 
-PLATFORM ?= posix
+APPLICATION ?= button
 
-TARGET_FILE ?= firmware.elf
+PLATFORM ?= posix
+TARGET_FILE ?= $(APPLICATION).elf
 
 CC = $(CROSS_COMPILE)gcc
 CPP = $(CROSS_COMPILE)cpp
 OBJCOPY = $(CROSS_COMPILE)objcopy
 
 SRC_DIR = src
-OBJ_DIR = obj
+OBJ_DIR = obj/$(PLATFORM)
-BIN_DIR = bin
+BIN_DIR = bin/$(PLATFORM)
 
 CPP_FLAGS += $(addprefix -I, $(INCLUDES))
 
 C_SRCS = $(wildcard $(SRC_DIR)/*.c)
 C_SRCS += $(wildcard $(SRC_DIR)/platform/$(PLATFORM)/*.c)
+C_SRCS += $(wildcard $(SRC_DIR)/application/$(APPLICATION)/*.c)
 C_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.c,%.o,$(C_SRCS)))
 OBJS = $(NRF_A_OBJS) $(NRF_C_OBJS) $(C_OBJS)
 
@@ -46,14 +48,16 @@ clean:
 	rm -f $(OBJS) $(patsubst %.o,%.d,$(OBJS))
 
 distclean:
-	rm -rf $(OBJ_DIR) $(BIN_DIR)
+	rm -rf bin obj
 
 $(TARGET): $(OBJS) $(THIS_MAKEFILE)
 	@mkdir -p $(dir $@)
 	$(CC) $(CC_FLAGS) $(LD_FLAGS) $(OBJS) $(addprefix -l,$(LIBS)) -o $@
+	ln -sf $(shell pwd)/$@ $(shell pwd)/bin/firmware.elf
 
 $(TARGET_HEX): $(TARGET) $(THIS_MAKEFILE)
 	$(OBJCOPY) -O ihex $(TARGET) $(TARGET_HEX)
+	ln -sf $(shell pwd)/$@ $(shell pwd)/bin/firmware.hex
 
 $(OBJ_DIR)/%.d: $(SRC_DIR)/%.c
 	@mkdir -p $(dir $@)
@@ -63,6 +67,6 @@ $(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
 	@mkdir -p $(dir $@)
 	$(CC) -c $(CPP_FLAGS) $(C_FLAGS) $< -o $@
 
-ifneq ($(MAKECMDGOALS),clean)
+ifeq "$(findstring $(MAKECMDGOALS), clean distclean)" ""
 -include $(patsubst %.o,%.d,$(OBJS))
 endif

src/application/blinky/main.c

@@ -0,0 +1,26 @@
+#include <stdbool.h>
+#include <limits.h>
+#include "nrf_delay.h"
+#include "boards.h"
+#include "platform/narf52/narf52_dk.h"
+ 
+#include "driver.h"
+ 
+int main(void)
+{
+    drv_open(&led_1);
+    drv_open(&led_2);
+    drv_open(&led_3);
+    drv_open(&led_4);
+
+    while(true) {
+        for(unsigned int i = 0; i < UINT_MAX; i++) {
+            char x = 0x30 | (char)(1 & i);
+            drv_write(&led_1, &x, 1);
+            drv_write(&led_2, &x, 1);
+            drv_write(&led_3, &x, 1);
+            drv_write(&led_4, &x, 1);
+            nrf_delay_ms(500);
+        }
+    }
+}