fork from http://sourceforge.net/projects/bacnet/

2025-10-26 23:35:52 +08:00 · 2013-03-21 22:53:31 +01:00
parent 5668c55fca
commit 01349ec9e8
843 changed files with 190207 additions and 0 deletions
--- a/ports/stm32f10x/timer_sys.c
+++ b/ports/stm32f10x/timer_sys.c
@@ -0,0 +1,125 @@
+/**************************************************************************
+*
+* Copyright (C) 2011 Steve Karg <skarg@users.sourceforge.net>
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*
+* Module Description:
+* Generate a periodic timer tick for use by generic timers in the code.
+*
+*************************************************************************/
+#include <stdbool.h>
+#include <stdint.h>
+#include "hardware.h"
+#include "timer.h"
+#include "debug.h"
+
+/* counter for the various timers */
+static volatile uint32_t Millisecond_Counter;
+
+/*************************************************************************
+* Description: Activate the LED
+* Returns: nothing
+* Notes: none
+**************************************************************************/
+static void timer_debug_on(
+    void)
+{
+    GPIO_WriteBit(GPIOB, GPIO_Pin_13, Bit_SET);
+}
+
+/*************************************************************************
+* Description: Activate the LED
+* Returns: nothing
+* Notes: none
+**************************************************************************/
+static void timer_debug_off(
+    void)
+{
+    GPIO_WriteBit(GPIOB, GPIO_Pin_13, Bit_RESET);
+}
+
+/*************************************************************************
+* Description: Toggle the state of the setup LED
+* Returns: none
+* Notes: none
+*************************************************************************/
+void timer_debug_toggle(
+    void)
+{
+    static bool state = false;
+
+    if (state) {
+        timer_debug_off();
+        state = false;
+    } else {
+        timer_debug_on();
+        state = true;
+    }
+}
+
+/*************************************************************************
+* Description: Interrupt Service Routine
+* Returns: nothing
+* Notes: reserved name for ISR handlers
+*************************************************************************/
+void SysTick_Handler(
+    void)
+{
+    /* increment the tick count */
+    Millisecond_Counter++;
+    timer_debug_toggle();
+}
+
+/*************************************************************************
+* Description: returns the current millisecond count
+* Returns: none
+* Notes: none
+*************************************************************************/
+uint32_t timer_milliseconds(
+    void)
+{
+    return Millisecond_Counter;
+}
+
+/*************************************************************************
+* Description: Timer setup for 1 millisecond timer
+* Returns: none
+* Notes: peripheral frequency defined in hardware.h
+*************************************************************************/
+void timer_init(
+    void)
+{
+    GPIO_InitTypeDef GPIO_InitStructure;
+
+    GPIO_StructInit(&GPIO_InitStructure);
+    /* Configure the Receive LED */
+    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
+    GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+    /* Setup SysTick Timer for 1ms interrupts  */
+    if (SysTick_Config(SystemCoreClock / 1000)) {
+        /* Capture error */
+        while (1);
+    }
+
+}