DMA2_Stream1_IRQHandler

LighthgiL

这里面的DMA2_Stream1_IRQHandler是怎么执行的呢？其他的程序里面根本就没有调用DMA2_Stream1_IRQHandler呀！

1. /**
   
2.   ******************************************************************************
   
3.   * @file    FMC_SDRAM/stm32f4xx_it.c
   
4.   * @author  MCD Application Team
   
5.   * @version V1.0.1
   
6.   * @date    11-November-2013
   
7.   * @brief   Main Interrupt Service Routines.
   
8.   *         This file provides template for all exceptions handler and
   
9.   *         peripherals interrupt service routine.
   
10.   ******************************************************************************
    
11.   * @attention
    
12.   *
    
13.   * <h2><center>&#169; COPYRIGHT 2013 STMicroelectronics</center></h2>
    
14.   *
    
15.   * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
    
16.   * You may not use this file except in compliance with the License.
    
17.   * You may obtain a copy of the License at:
    
18.   *
    
19.   *        http://www.st.com/software_license_agreement_liberty_v2
    
20.   *
    
21.   * Unless required by applicable law or agreed to in writing, software
    
22.   * distributed under the License is distributed on an "AS IS" BASIS,
    
23.   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    
24.   * See the License for the specific language governing permissions and
    
25.   * limitations under the License.
    
26.   *
    
27.   ******************************************************************************
    
28.   */
    
29. 
    
30. /* Includes ------------------------------------------------------------------*/
    
31. #include "stm32f4xx_it.h"
    
32. #include "./camera/bsp_ov2640.h"
    
33. #include "./systick/bsp_SysTick.h"
    
34. #include "./Recognization/Recognization.h"
    
35. 
    
36. extern unsigned int Task_Delay[];
    
37. 
    
38. /** @addtogroup STM32F429I_DISCOVERY_Examples
    
39.   * @{
    
40.   */
    
41. 
    
42. /** @addtogroup FMC_SDRAM
    
43.   * @{
    
44.   */
    
45. 
    
46. /* Private typedef -----------------------------------------------------------*/
    
47. /* Private define ------------------------------------------------------------*/
    
48. /* Private macro -------------------------------------------------------------*/
    
49. /* Private variables ---------------------------------------------------------*/
    
50. /* Private function prototypes -----------------------------------------------*/
    
51. /* Private functions ---------------------------------------------------------*/
    
52. 
    
53. /******************************************************************************/
    
54. /*            Cortex-M4 Processor Exceptions Handlers                         */
    
55. /******************************************************************************/
    
56. 
    
57. /**
    
58.   * @brief  This function handles NMI exception.
    
59.   * @param  None
    
60.   * @retval None
    
61.   */
    
62. void NMI_Handler(void)
    
63. {
    
64. }
    
65. 
    
66. /**
    
67.   * @brief  This function handles Hard Fault exception.
    
68.   * @param  None
    
69.   * @retval None
    
70.   */
    
71. void HardFault_Handler(void)
    
72. {
    
73.   /* Go to infinite loop when Hard Fault exception occurs */
    
74.   while (1)
    
75.   {}
    
76. }
    
77. 
    
78. /**
    
79.   * @brief  This function handles Memory Manage exception.
    
80.   * @param  None
    
81.   * @retval None
    
82.   */
    
83. void MemManage_Handler(void)
    
84. {
    
85.   /* Go to infinite loop when Memory Manage exception occurs */
    
86.   while (1)
    
87.   {}
    
88. }
    
89. 
    
90. /**
    
91.   * @brief  This function handles Bus Fault exception.
    
92.   * @param  None
    
93.   * @retval None
    
94.   */
    
95. void BusFault_Handler(void)
    
96. {
    
97.   /* Go to infinite loop when Bus Fault exception occurs */
    
98.   while (1)
    
99.   {}
    
100. }
     
101. 
     
102. /**
     
103.   * @brief  This function handles Usage Fault exception.
     
104.   * @param  None
     
105.   * @retval None
     
106.   */
     
107. void UsageFault_Handler(void)
     
108. {
     
109.   /* Go to infinite loop when Usage Fault exception occurs */
     
110.   while (1)
     
111.   {}
     
112. }
     
113. 
     
114. /**
     
115.   * @brief  This function handles Debug Monitor exception.
     
116.   * @param  None
     
117.   * @retval None
     
118.   */
     
119. void DebugMon_Handler(void)
     
120. {}
     
121. 
     
122. /**
     
123.   * @brief  This function handles SVCall exception.
     
124.   * @param  None
     
125.   * @retval None
     
126.   */
     
127. void SVC_Handler(void)
     
128. {}
     
129. 
     
130. /**
     
131.   * @brief  This function handles PendSV_Handler exception.
     
132.   * @param  None
     
133.   * @retval None
     
134.   */
     
135. void PendSV_Handler(void)
     
136. {}
     
137. 
     
138.        
     
139. extern uint32_t Task_Delay[];
     
140. /**
     
141.   * @brief  This function handles SysTick Handler.
     
142.   * @param  None
     
143.   * @retval None
     
144.   */
     
145. void SysTick_Handler(void)
     
146. {
     
147.         uint8_t i;
     
148.        
     
149.   TimingDelay_Decrement();
     
150.        
     
151.         for(i=0;i<NumOfTask;i++)
     
152.         {
     
153.                 if(Task_Delay[i])
     
154.                 {
     
155.                         Task_Delay[i]--;
     
156.                 }
     
157.         }
     
158. }
     
159. 
     
160. 
     
161. 
     
162. /******************************************************************************/
     
163. /*                 STM32F4xx Peripherals Interrupt Handlers                   */
     
164. /*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
     
165. /*  available peripheral interrupt handler's name please refer to the startup */
     
166. /*  file (startup_stm32f429_439xx.s).                         */
     
167. /******************************************************************************/
     
168. 
     
169. extern uint16_t lcd_width, lcd_height;
     
170. extern uint16_t img_width, img_height;
     
171. extern uint8_t fps;
     
172. 
     
173. //记录传输了多少行
     
174. static uint16_t line_num =0;
     
175. 
     
176. 
     
177. void DMA2_Stream1_IRQHandler(void)
     
178. {
     
179.   if(  DMA_GetITStatus(DMA2_Stream1,DMA_IT_TCIF1) == SET )   
     
180.   {
     
181.                 /*行计数*/
     
182.                 line_num++;
     
183. 
     
184.     if(line_num==img_height)
     
185.                 {
     
186.                         /*传输完一帧,计数复位*/
     
187.                         line_num=0;
     
188.                        
     
189.                         xiang();
     
190.                
     
191.                 }               
     
192.                 /*DMA 一行一行传输*/
     
193.     OV2640_DMA_Config(FSMC_LCD_ADDRESS+(lcd_width*2*(lcd_height-line_num-1)),img_width*2/4);
     
194.     DMA_ClearITPendingBit(DMA2_Stream1,DMA_IT_TCIF1);
     
195.         }
     
196. }
     
197. 
     
198. 
     
199. //使用帧中断重置line_num,可防止有时掉数据的时候DMA传送行数出现偏移
     
200. void DCMI_IRQHandler(void)
     
201. {
     
202. 
     
203.         if(  DCMI_GetITStatus (DCMI_IT_FRAME) == SET )   
     
204.         {
     
205.                 /*传输完一帧，计数复位*/
     
206.                 line_num=0;
     
207.                 fps++; //帧率计数
     
208.        
     
209.                
     
210.                
     
211.                 DCMI_ClearITPendingBit(DCMI_IT_FRAME);
     
212.         }
     
213. }
     
214. 
     
215. 
     
216. /**
     
217.   * @}
     
218.   */
     
219. 
     
220. /**
     
221.   * @}
     
222.   */
     
223. 
     
224. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     

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flyleaf

OV2640_DMA_Config 配置了dma