OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32F103_Keil/] [STM32F10xFWLib/] [src/] [stm32f10x_systick.c] - Blame information for rev 582

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 582 jeremybenn
/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
2
* File Name          : stm32f10x_systick.c
3
* Author             : MCD Application Team
4
* Date First Issued  : 09/29/2006
5
* Description        : This file provides all the SysTick firmware functions.
6
********************************************************************************
7
* History:
8
* 04/02/2007: V0.2
9
* 02/05/2007: V0.1
10
* 09/29/2006: V0.01
11
********************************************************************************
12
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
13
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
14
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
15
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
16
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
17
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
18
*******************************************************************************/
19
 
20
/* Includes ------------------------------------------------------------------*/
21
#include "stm32f10x_systick.h"
22
 
23
/* Private typedef -----------------------------------------------------------*/
24
/* Private define ------------------------------------------------------------*/
25
/* ---------------------- SysTick registers bit mask -------------------- */
26
/* CTRL TICKINT Mask */
27
#define CTRL_TICKINT_Set      ((u32)0x00000002)
28
#define CTRL_TICKINT_Reset    ((u32)0xFFFFFFFD)
29
 
30
/* SysTick Flag Mask */
31
#define FLAG_Mask             ((u8)0x1F)
32
 
33
/* Private macro -------------------------------------------------------------*/
34
/* Private variables ---------------------------------------------------------*/
35
/* Private function prototypes -----------------------------------------------*/
36
/* Private functions ---------------------------------------------------------*/
37
 
38
/*******************************************************************************
39
* Function Name  : SysTick_CLKSourceConfig
40
* Description    : Configures the SysTick clock source.
41
* Input          : - SysTick_CLKSource: specifies the SysTick clock source.
42
*                    This parameter can be one of the following values:
43
*                       - SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8
44
*                         selected as SysTick clock source.
45
*                       - SysTick_CLKSource_HCLK: AHB clock selected as
46
*                         SysTick clock source.
47
* Output         : None
48
* Return         : None
49
*******************************************************************************/
50
void SysTick_CLKSourceConfig(u32 SysTick_CLKSource)
51
{
52
  /* Check the parameters */
53
  assert(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
54
 
55
  if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
56
  {
57
    SysTick->CTRL |= SysTick_CLKSource_HCLK;
58
  }
59
  else
60
  {
61
    SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
62
  }
63
}
64
 
65
/*******************************************************************************
66
* Function Name  : SysTick_SetReload
67
* Description    : Sets SysTick Reload value.
68
* Input          : - Reload: SysTick Reload new value.
69
*                    This parameter must be a number between 1 and 0xFFFFFF.
70
* Output         : None
71
* Return         : None
72
*******************************************************************************/
73
void SysTick_SetReload(u32 Reload)
74
{
75
  /* Check the parameters */
76
  assert(IS_SYSTICK_RELOAD(Reload));
77
 
78
  SysTick->LOAD = Reload;
79
}
80
 
81
/*******************************************************************************
82
* Function Name  : SysTick_CounterCmd
83
* Description    : Enables or disables the SysTick counter.
84
* Input          : - SysTick_Counter: new state of the SysTick counter.
85
*                    This parameter can be one of the following values:
86
*                       - SysTick_Counter_Disable: Disable counter
87
*                       - SysTick_Counter_Enable: Enable counter
88
*                       - SysTick_Counter_Clear: Clear counter value to 0
89
* Output         : None
90
* Return         : None
91
*******************************************************************************/
92
void SysTick_CounterCmd(u32 SysTick_Counter)
93
{
94
  /* Check the parameters */
95
  assert(IS_SYSTICK_COUNTER(SysTick_Counter));
96
 
97
  if (SysTick_Counter == SysTick_Counter_Clear)
98
  {
99
    SysTick->VAL = SysTick_Counter_Clear;
100
  }
101
  else
102
  {
103
    if (SysTick_Counter == SysTick_Counter_Enable)
104
    {
105
      SysTick->CTRL |= SysTick_Counter_Enable;
106
    }
107
    else
108
    {
109
      SysTick->CTRL &= SysTick_Counter_Disable;
110
    }
111
  }
112
}
113
 
114
/*******************************************************************************
115
* Function Name  : SysTick_ITConfig
116
* Description    : Enables or disables the SysTick Interrupt.
117
* Input          : - NewState: new state of the SysTick Interrupt.
118
*                    This parameter can be: ENABLE or DISABLE.
119
* Output         : None
120
* Return         : None
121
*******************************************************************************/
122
void SysTick_ITConfig(FunctionalState NewState)
123
{
124
  /* Check the parameters */
125
  assert(IS_FUNCTIONAL_STATE(NewState));
126
 
127
  if (NewState != DISABLE)
128
  {
129
    SysTick->CTRL |= CTRL_TICKINT_Set;
130
  }
131
  else
132
  {
133
    SysTick->CTRL &= CTRL_TICKINT_Reset;
134
  }
135
}
136
 
137
/*******************************************************************************
138
* Function Name  : SysTick_GetCounter
139
* Description    : Gets SysTick counter value.
140
* Input          : None
141
* Output         : None
142
* Return         : SysTick current value
143
*******************************************************************************/
144
u32 SysTick_GetCounter(void)
145
{
146
  return(SysTick->VAL);
147
}
148
 
149
/*******************************************************************************
150
* Function Name  : SysTick_GetFlagStatus
151
* Description    : Checks whether the specified SysTick flag is set or not.
152
* Input          : - SysTick_FLAG: specifies the flag to check.
153
*                    This parameter can be one of the following values:
154
*                       - SysTick_FLAG_COUNT
155
*                       - SysTick_FLAG_SKEW
156
*                       - SysTick_FLAG_NOREF
157
* Output         : None
158
* Return         : None
159
*******************************************************************************/
160
FlagStatus SysTick_GetFlagStatus(u8 SysTick_FLAG)
161
{
162
  u32 tmp = 0;
163
  u32 statusreg = 0;
164
  FlagStatus bitstatus = RESET;
165
 
166
  /* Check the parameters */
167
  assert(IS_SYSTICK_FLAG(SysTick_FLAG));
168
 
169
  /* Get the SysTick register index */
170
  tmp = SysTick_FLAG >> 5;
171
 
172
  if (tmp == 1) /* The flag to check is in CTRL register */
173
  {
174
    statusreg = SysTick->CTRL;
175
  }
176
  else          /* The flag to check is in CALIB register */
177
  {
178
    statusreg = SysTick->CALIB;
179
  }
180
 
181
  /* Get the flag position */
182
  tmp = SysTick_FLAG & FLAG_Mask;
183
 
184
  if ((statusreg & ((u32)1 << tmp)) != (u32)RESET)
185
  {
186
    bitstatus = SET;
187
  }
188
  else
189
  {
190
    bitstatus = RESET;
191
  }
192
  return bitstatus;
193
}
194
 
195
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.