Added miniature simulator using simavr

Author: kcuzner

sim/Makefile

@@ -0,0 +1,38 @@
+# Makefile for kos simulation
+#
+# The basic simulation is just a flashing led
+#
+
+BINDIR=../bin
+OBJDIR=obj
+SRCDIR=src
+INCDIR=include
+
+INCLUDES=-I$(INCDIR)
+LIBS=simavr sdl2
+
+CC=gcc
+MKDIR=mkdir
+RM=rm -rf
+
+SRC=$(wildcard $(SRCDIR)/*.c)
+OBJS:=$(addprefix $(OBJDIR)/,$(notdir $(SRC:.c=.o)))
+
+CFLAGS=$(INCLUDES) -g
+CFLAGS+=`pkg-config --cflags $(LIBS)`
+LDFLAGS=`pkg-config --libs $(LIBS)` -lpthread
+
+all:: $(BINDIR)/sim
+
+clean:
+	$(RM) $(BINDIR)/sim
+	$(RM) $(OBJDIR)
+
+$(BINDIR)/sim: $(OBJS)
+	@$(MKDIR) -p $(dir $@)
+	$(CC) $(LDFLAGS) $(OBJS) -o $@
+
+$(OBJDIR)/%.o: $(SRCDIR)/%.c
+	@$(MKDIR) -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+

sim/src/main.c

@@ -0,0 +1,103 @@
+/**
+ * Simulator for KOS using sdl
+ */
+
+#include <stdio.h>
+#include <libgen.h>
+
+#include <pthread.h>
+
+#include <SDL.h>
+
+#include "sim_avr.h"
+#include "sim_elf.h"
+#include "sim_gdb.h"
+
+#define GDB_PORT 1234
+#define SCREEN_WIDTH 640
+#define SCREEN_HEIGHT 480
+
+static avr_t *avr;
+
+static void *avr_run_thread(void * ig)
+{
+    while (1)
+    {
+        avr_run(avr);
+    }
+
+    return NULL;
+}
+
+static SDL_Window *init_window(void)
+{
+    SDL_Window *win = 0;
+
+    if (SDL_Init(SDL_INIT_VIDEO) < 0)
+    {
+        fprintf(stderr, "Unable to initialize SDL: %s", SDL_GetError());
+        exit(1);
+    }
+
+    win = SDL_CreateWindow("KOS Simulator", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+    if (!win)
+    {
+        fprintf(stderr, "Unable to create SDL Window: %s", SDL_GetError());
+        exit(1);
+    }
+
+    return win;
+}
+
+static char handle_event(SDL_Event *event)
+{
+    switch (event->type)
+    {
+        case SDL_QUIT:
+            return 0;
+    }
+
+    return 1; //continue
+}
+
+int main(int argc, char** argv)
+{
+    elf_firmware_t f;
+    SDL_Window *win;
+    const char *fname = "kos.elf";
+    SDL_Event event;
+
+    if (elf_read_firmware(fname, &f) < 0)
+    {
+        exit(1);
+    }
+
+    avr = avr_make_mcu_by_name(f.mmcu);
+    avr_init(avr);
+    avr_load_firmware(avr, &f);
+
+    if (SDL_Init(SDL_INIT_VIDEO) < 0)
+    {
+        fprintf(stderr, "Unable to initialize SDL: %s", SDL_GetError());
+        exit(1);
+    }
+
+    win = SDL_CreateWindow("KOS Simulator", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+    if (!win)
+    {
+        fprintf(stderr, "Unable to create SDL Window: %s", SDL_GetError());
+        exit(1);
+    }
+
+    while (SDL_WaitEvent(&event) >= 0)
+    {
+        if (!handle_event(&event))
+            break;
+    }
+
+    SDL_DestroyWindow(win);
+
+    SDL_Quit();
+
+    return 0;
+}