pass config to init_emulator; update README

README.md

@@ -5,3 +5,8 @@ Standalone HP 48(SX/GX) front-end ready to be plugged into emulators.
 Provide both GUI implemented in SDL2 and TUI in ncurses.
 
 Extracted from x48ng.
+
+## How to use?
+
+To plug an emulator you'll want to look into the interface defined in emulator.h and emulator.c
+A basic main loop is shown in main.c

src/emulator.c

@@ -1,5 +1,8 @@
+#include "config.h"
 #include "emulator.h"
 
+static config_t config;
+
 typedef struct hpkey_t {
     int code;
     bool pressed;
@@ -100,10 +103,7 @@ void get_lcd_buffer( int* target )
 
 int get_contrast( void ) { return contrast; }
 
-void init_emulator( void )
-{
-    // nop;
-}
+void init_emulator( config_t* conf ) { config = *conf; }
 
 void exit_emulator( void )
 {

src/emulator.h

@@ -3,6 +3,8 @@
 
 #include <stdbool.h>
 
+#include "config.h"
+
 // Keys
 #define HPKEY_A 0
 #define HPKEY_B 1
@@ -90,7 +92,7 @@ extern void press_key( int hpkey );
 extern void release_key( int hpkey );
 extern bool is_key_pressed( int hpkey );
 
-extern void init_emulator( void );
+extern void init_emulator( config_t* conf );
 extern void exit_emulator( void );
 
 extern unsigned char get_annunciators( void );

src/main.c

@@ -5,10 +5,9 @@
 
 int main( int argc, char** argv )
 {
-
     config_t* config = config_init( argc, argv );
 
-    init_emulator();
+    init_emulator( config );
 
     /* (G)UI */
     setup_ui( config );