Rename plugins to external

applications/external/tama_p1/tamalib/tamalib.c

@@ -0,0 +1,128 @@
+/*
+ * TamaLIB - A hardware agnostic Tamagotchi P1 emulation library
+ *
+ * Copyright (C) 2021 Jean-Christophe Rona <jc@rona.fr>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+#include "tamalib.h"
+#include "hw.h"
+#include "cpu.h"
+#include "hal.h"
+
+#define DEFAULT_FRAMERATE 30 // fps
+
+static exec_mode_t exec_mode = EXEC_MODE_RUN;
+
+static u32_t step_depth = 0;
+
+static timestamp_t screen_ts = 0;
+
+static u32_t ts_freq;
+
+static u8_t g_framerate = DEFAULT_FRAMERATE;
+
+hal_t* g_hal;
+
+bool_t tamalib_init(const u12_t* program, breakpoint_t* breakpoints, u32_t freq) {
+    bool_t res = 0;
+
+    res |= cpu_init(program, breakpoints, freq);
+    res |= hw_init();
+
+    ts_freq = freq;
+
+    return res;
+}
+
+void tamalib_release(void) {
+    hw_release();
+    cpu_release();
+}
+
+void tamalib_set_framerate(u8_t framerate) {
+    g_framerate = framerate;
+}
+
+u8_t tamalib_get_framerate(void) {
+    return g_framerate;
+}
+
+void tamalib_register_hal(hal_t* hal) {
+    g_hal = hal;
+}
+
+void tamalib_set_exec_mode(exec_mode_t mode) {
+    exec_mode = mode;
+    step_depth = cpu_get_depth();
+    cpu_sync_ref_timestamp();
+}
+
+void tamalib_step(void) {
+    if(exec_mode == EXEC_MODE_PAUSE) {
+        return;
+    }
+
+    if(cpu_step()) {
+        exec_mode = EXEC_MODE_PAUSE;
+        step_depth = cpu_get_depth();
+    } else {
+        switch(exec_mode) {
+        case EXEC_MODE_PAUSE:
+        case EXEC_MODE_RUN:
+            break;
+
+        case EXEC_MODE_STEP:
+            exec_mode = EXEC_MODE_PAUSE;
+            break;
+
+        case EXEC_MODE_NEXT:
+            if(cpu_get_depth() <= step_depth) {
+                exec_mode = EXEC_MODE_PAUSE;
+                step_depth = cpu_get_depth();
+            }
+            break;
+
+        case EXEC_MODE_TO_CALL:
+            if(cpu_get_depth() > step_depth) {
+                exec_mode = EXEC_MODE_PAUSE;
+                step_depth = cpu_get_depth();
+            }
+            break;
+
+        case EXEC_MODE_TO_RET:
+            if(cpu_get_depth() < step_depth) {
+                exec_mode = EXEC_MODE_PAUSE;
+                step_depth = cpu_get_depth();
+            }
+            break;
+        }
+    }
+}
+
+void tamalib_mainloop(void) {
+    timestamp_t ts;
+
+    while(!g_hal->handler()) {
+        tamalib_step();
+
+        /* Update the screen @ g_framerate fps */
+        ts = g_hal->get_timestamp();
+        if(ts - screen_ts >= ts_freq / g_framerate) {
+            screen_ts = ts;
+            g_hal->update_screen();
+        }
+    }
+}