Diff: POKITTO_HW/PokittoClock.cpp

Revision:

0:e8b8f36b4505

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/POKITTO_HW/PokittoClock.cpp	Mon Sep 18 11:47:51 2017 +0000
@@ -0,0 +1,81 @@
+/**************************************************************************/
+/*!
+    @file     PokittoClock.cpp
+    @author   Jonne Valola
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2015, Jonne Valola
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+
+#include "PokittoCore.h"
+#include "pinmap.h"
+#include "HWLCD.h"
+#include "Pokitto_settings.h"
+#include "wait_api.h"
+
+uint32_t pt_count=0;
+uint32_t* ptimer;
+
+extern "C" {
+void SysTick_Handler(void) {
+    //interrupt happens when systick has counted down to zero
+    #if PROJ_GAMEBOY > 0
+    uint32_t a;
+    a = *ptimer;
+    *ptimer = a + 1;
+    #endif
+    pt_count+=10;                        // increment counter
+}}
+
+using namespace Pokitto;
+
+uint32_t Core::refreshtime;
+
+void Core::initClock() {
+        // to get 1000 interrupts per second the reload value should be 48000
+    #if PROJ_GAMEBOY > 0
+    ptimer = &pt_count;
+    SysTick->LOAD = 480000-1;
+    #else
+    SysTick->LOAD = 480000-1;
+    #endif
+    SysTick->VAL  = 0;
+    SysTick->CTRL  = 4 | 2 | 1; //CLKSOURCE=CPU clock | TICKINT | ENABLE
+    pt_count = 0;
+}
+
+uint32_t Core::getTime() {
+    return pt_count;
+}
+
+void Core::wait(uint16_t ms) {
+    wait_ms(ms);
+}
+