Diff: sys.c

Revision:

0:404dae88af71

Child:

2:1c1f7677ac17

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sys.c	Tue Mar 01 02:40:19 2016 +0000
@@ -0,0 +1,104 @@
+/***************************************************************************
+ * STM32 VGA demo
+ * Copyright (C) 2012 Artekit Italy
+ * http://www.artekit.eu
+ * Written by Ruben H. Meleca
+ 
+### sys.c
+ 
+#   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+***************************************************************************/
+
+#include "stm32f30x.h"
+#include "sys.h"
+
+volatile __attribute__ ((section ("ccmram"))) u32	sysTiming;
+volatile __attribute__ ((section ("ccmram"))) u32	sysTicks = 0;
+//extern volatile sysTicks;
+volatile u32	sysDel1Ms;
+
+//*****************************************************************************
+//	Function sysInitSystemTimer(void)
+//
+//	Initialize system timer
+//
+//
+//	return			0=Fail, 1=OK
+//*****************************************************************************
+u8 sysInitSystemTimer(void) {
+
+	if (SysTick_Config((SystemCoreClock / 1000) -1 )) {
+		return(0);
+	}
+	return(1);
+}
+
+//*****************************************************************************
+//	Function sysDelay1Ms(void)
+//
+//	Performs delay 1 milliseconds
+//
+//	return			None
+//*****************************************************************************
+__attribute__ ((section ("ccmram")))
+void sysDelay1Ms(void) {
+
+	for (sysDel1Ms = 0; sysDel1Ms < 1000; sysDel1Ms++) { };
+}
+
+
+//volatile pu16		__timer = (pu16) 0x40006c04;
+
+//*****************************************************************************
+//	Function sysDelayMs(u32 dly)
+//
+//	Performs delay "dly" milliseconds
+//
+//	parameters		dly		Delay value in milliseconds
+//
+//	return			None
+//*****************************************************************************
+__attribute__ ((section ("ccmram")))
+void sysDelayMs(u32 dly) {
+
+	sysTiming = dly;
+
+	while (sysTiming > 0) { };
+
+}
+
+//*****************************************************************************
+//	Function sysDelayMs(u32 dly)
+//
+//	Performs delay "dly" milliseconds
+//
+//	parameters		dly		Delay value in milliseconds
+//
+//	return			None
+//*****************************************************************************
+__attribute__ ((section ("ccmram")))
+void sysTickCount(void) {
+
+	sysTicks++;
+	if (sysTiming > 0) --sysTiming;	
+}
+
+__attribute__ ((section ("ccmram"))) void SysTick_Handler(void) {
+        sysTicks++;
+        if (sysTiming > 0) --sysTiming; 
+}
+
+