STM32F429+OV2640中斷疑惑 用的是DCMI+DMA
DCMI的帧中断不太理解,我DCMI设置CaptureMode设置为SnapShot模式,中断采用FRAME中断,单步调试之后发现,进中断之后显示的数据并不是一张完整的图片。
问题:这个帧中断的意思是DCMI接收完成一整张图片之后触发的中断吗?
下面我贴出我的配置,希望有经验的网友可以帮我看下问题所在:
原理图:
原理图
msb
DCMI数据接口采用8bits数据线,默认MSB方式设置,0V2640作为主设备
GPIO初始化:
/**************此处省略结构体定义与开启时钟的设定**********************/
…………
/**************power down 和 reset 模式的设置***********************/
// setup the pwdn and rst pins
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 |GPIO_Pin_5;
GPIO_Init(GPIOD, &GPIO_InitStructure);
// pdwn set low to disable (active high)
GPIO_ResetBits(GPIOD, GPIO_Pin_4);
// rst low to reset for 200 ms
GPIO_ResetBits(GPIOD, GPIO_Pin_5);
mdelay(200);
// rst high to disable (active low)
GPIO_SetBits(GPIOD, GPIO_Pin_5);
// should be running now !
/********************DCMI GPIO初始化*********************/
/* Connect DCMI pins to AF13 ************************************************/
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_DCMI);//HSYNC
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_DCMI);//PCLK
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_DCMI);//VSYNC
GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_DCMI);//D6
GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_DCMI);//D7
GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_DCMI);//D0
GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_DCMI);//D1
GPIO_PinAFConfig(GPIOD, GPIO_PinSource3, GPIO_AF_DCMI);//D5
GPIO_PinAFConfig(GPIOH, GPIO_PinSource11, GPIO_AF_DCMI);//D2
GPIO_PinAFConfig(GPIOH, GPIO_PinSource12, GPIO_AF_DCMI);//D3
GPIO_PinAFConfig(GPIOH, GPIO_PinSource14, GPIO_AF_DCMI);//D4
/* DCMI GPIO configuration **************************************************/
/*
D0 -- PC6
D1 -- PC7
D2 -- PH11
D3 -- PH12
D4 -- PH14
D5 -- PD3
D6 -- PB8
D7 -- PB9
PCK - PA6
HS -- PA4
VS -- PB7
XCLK -- PA8 // mc0 driven
Y1,Y0 Not connected
RST -- PD5 // active low
PWDN -- PD4 // active hi
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_14;
GPIO_Init(GPIOH, &GPIO_InitStructure);
/* PCLK(PA6) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/****** Configures the I2C2 used for OV2640 camera module configuration *****/
/* I2C2 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
/* GPIOB clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
/* Connect I2C2 pins to AF4 */
GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_I2C2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_I2C2);
/* Configure I2C2 GPIOs */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure I2C2 */
/* I2C DeInit */
I2C_DeInit(I2C2);
/* Set the I2C structure parameters */
I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0xFE;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStruct.I2C_ClockSpeed = 30000;
/* Initialize the I2C peripheral w/ selected parameters */
I2C_Init(I2C2, &I2C_InitStruct);
/* Enable the I2C peripheral */
I2C_Cmd(I2C2, ENABLE);
/*********************DCMI初始化*********************/
/*** Configures the DCMI to interface with the OV2640 camera module ***/
/* Enable DCMI clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI, ENABLE);
/* DCMI configuration */
DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_Continuous;
DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Rising;
DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_Low;
DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_High;
DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;
DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;
DCMI_Init(&DCMI_InitStructure);
DCMI_ITConfig(DCMI_IT_VSYNC | DCMI_IT_FRAME | DCMI_IT_OVF | DCMI_IT_ERR, ENABLE);
/*******************DMA初始化****************/
/* DMA2 Stream1 Configuration */
DMA_DeInit(DMA2_Stream1);
while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE);
DMA_InitStructure.DMA_Channel = DMA_Channel_1;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(DCMI->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = SDRAM_BANK_ADDR + WRITE_READ_ADDR;//此处为外部SDRAM地址,用来把拍到的图片显示到LCD上
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 9600;//这里的buffersize定义成1可以进入DMA传输完成中断,定义成9600,发现进不了中断,把DMA传输的数据取出来看,也只有2700个(uint16_t)的数据,不知道是不是DMA的设置问题?
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_ITConfig(DMA2_Stream1, DMA_IT_TC, ENABLE);
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
/***********中断初始化*******************/
/**
* Interrupts
*/
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 21;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
/************0V2640设置***************/
/**
* @brief Configures the OV2640 camera in QQVGA mode.
* @param None
* @retval None
*/
void OV2640_QQVGAConfig(void)
{
uint32_t i;
OV2640_Reset();
mdelay(200);
/* Initialize OV2640 */
for(i=0; i<(sizeof(OV2640_QQVGA)/2); i++)
{
OV2640_WriteReg(OV2640_QQVGA[0], OV2640_QQVGA[1]);//这里的I2C读写都没有问题,我写进去后读出来看过,数据是正确的
mdelay(2);
}
}
/*******************QQVGA的设置************************/
/* Initialization sequence for QQVGA resolution (160x120) */
const char OV2640_QQVGA[][2]=
{
{0xff, 0x00},
{0x2c, 0xff},
{0x2e, 0xdf},
{0xff, 0x01},
{0x3c, 0x32},
{0x11, 0x00},//CLKRC: Clock Rate Control -- CLK = XVCLK/(CLKRC[5:0] + 1)
//XVCLK: 24MHz
//CLKRC: CLKRC[6] 0 -- 0 master mode; 1 slave mode
{0x09, 0x02},//COM2: COM2[2] 0 -- 0 master mode; 1 slave mode
{0x04, 0xA8},
{0x13, 0xe5},
{0x14, 0x48},
{0x2c, 0x0c},
{0x33, 0x78},
{0x3a, 0x33},
{0x3b, 0xfB},
{0x3e, 0x00},
{0x43, 0x11},
{0x16, 0x10},
{0x4a, 0x81},
{0x21, 0x99},
{0x24, 0x40},
{0x25, 0x38},
{0x26, 0x82},
{0x5c, 0x00},
{0x63, 0x00},
{0x46, 0x3f},//FLL: Frame Lengtn Adjustment LSBs
//Each bit will add 1 horizontal lines timing in frame
{0x0c, 0x3c},
{0x61, 0x70},
{0x62, 0x80},
{0x7c, 0x05},
{0x20, 0x80},
{0x28, 0x30},
{0x6c, 0x00},
{0x6d, 0x80},
{0x6e, 0x00},
{0x70, 0x02},
{0x71, 0x94},
{0x73, 0xc1},
{0x3d, 0x34},
{0x5a, 0x57},
{0x12, 0x00},//COM7: COM7[3] 0 -- 0 master mode; 1 slave mode
{0x11, 0x00},
{0x17, 0x11},//HREFST MSB 8 bits, 3LSBs in REG32[2:0] Horizontal Window start: 0001 0001 110 -- 142
{0x18, 0x75},//HREFEND MSB 8 bits, .............[5:3]...................end : 0111 0101 110 -- 942
//Horizontal Window width 942-142=800
{0x19, 0x01},//VSTRT MSB 8 bits, 2LSB2 in COM1[1:0] Vertical Window Start: 0000 0001 11 -- 7
{0x1a, 0x97},//VEND ......................COM1[3:2].................end : 1001 0111 11 -- 607
//Vertical window height 607-7=600
{0x32, 0x36},//REG32 include horizontal window end/start position 3 LSBs
//end:bit[5:3] 110
//start: bit[2:0] 110
{0x03, 0x0f},//REG COM1
//end: bit[3:2] 11
//start: bit[0:1] 11
{0x37, 0x40},
{0x4f, 0xbb},
{0x50, 0x9c},
{0x5a, 0x57},
{0x6d, 0x80},
{0x6d, 0x38},
{0x39, 0x02},
{0x35, 0x88},
{0x22, 0x0a},
{0x37, 0x40},
{0x23, 0x00},
{0x34, 0xa0},//ARCOM2 bit[2] Zoom window horizontal start point: 0
{0x36, 0x1a},
{0x06, 0x02},
{0x07, 0xc0},
{0x0d, 0xb7},
{0x0e, 0x01},
{0x4c, 0x00},
{0xff, 0x00},
{0xe5, 0x7f},
{0xf9, 0xc0},
{0x41, 0x24},
{0xe0, 0x14},
{0x76, 0xff},
{0x33, 0xa0},
{0x42, 0x20},
{0x43, 0x18},
{0x4c, 0x00},
{0x87, 0xd0},
{0x88, 0x3f},
{0xd7, 0x03},
{0xd9, 0x10},
{0xd3, 0x82},
{0xc8, 0x08},
{0xc9, 0x80},
{0x7d, 0x00},
{0x7c, 0x03},
{0x7d, 0x48},
{0x7c, 0x08},
{0x7d, 0x20},
{0x7d, 0x10},
{0x7d, 0x0e},
{0x90, 0x00},
{0x91, 0x0e},
{0x91, 0x1a},
{0x91, 0x31},
{0x91, 0x5a},
{0x91, 0x69},
{0x91, 0x75},
{0x91, 0x7e},
{0x91, 0x88},
{0x91, 0x8f},
{0x91, 0x96},
{0x91, 0xa3},
{0x91, 0xaf},
{0x91, 0xc4},
{0x91, 0xd7},
{0x91, 0xe8},
{0x91, 0x20},
{0x92, 0x00},
{0x93, 0x06},
{0x93, 0xe3},
{0x93, 0x02},
{0x93, 0x02},
{0x93, 0x00},
{0x93, 0x04},
{0x93, 0x00},
{0x93, 0x03},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x93, 0x00},
{0x96, 0x00},
{0x97, 0x08},
{0x97, 0x19},
{0x97, 0x02},
{0x97, 0x0c},
{0x97, 0x24},
{0x97, 0x30},
{0x97, 0x28},
{0x97, 0x26},
{0x97, 0x02},
{0x97, 0x98},
{0x97, 0x80},
{0x97, 0x00},
{0x97, 0x00},
{0xc3, 0xef},
{0xff, 0x00},
{0xba, 0xdc},
{0xbb, 0x08},
{0xb6, 0x24},
{0xb8, 0x33},
{0xb7, 0x20},
{0xb9, 0x30},
{0xb3, 0xb4},
{0xb4, 0xca},
{0xb5, 0x43},
{0xb0, 0x5c},
{0xb1, 0x4f},
{0xb2, 0x06},
{0xc7, 0x00},
{0xc6, 0x51},
{0xc5, 0x11},
{0xc4, 0x9c},
{0xbf, 0x00},
{0xbc, 0x64},
{0xa6, 0x00},
{0xa7, 0x1e},
{0xa7, 0x6b},
{0xa7, 0x47},
{0xa7, 0x33},
{0xa7, 0x00},
{0xa7, 0x23},
{0xa7, 0x2e},
{0xa7, 0x85},
{0xa7, 0x42},
{0xa7, 0x33},
{0xa7, 0x00},
{0xa7, 0x23},
{0xa7, 0x1b},
{0xa7, 0x74},
{0xa7, 0x42},
{0xa7, 0x33},
{0xa7, 0x00},
{0xa7, 0x23},
{0xc0, 0xc8},//0xc8 image horizontal size 200
{0xc1, 0x96},//0x96 image vertical size 150
{0x8c, 0x00},
{0x86, 0x3d},
{0x50, 0x92},
{0x51, 0x90},//HSIZE[7:0] 1001 0000 VHYX[3](HSIZE[3]): 1 1001 0000 -- 400
{0x52, 0x2c},//BSIZE[7:0] 0010 1100 VHYX[7](HSIZE[8]): 1 0010 1100 -- 300
{0x53, 0x00},//0
{0x54, 0x00},//0
{0x55, 0x88},//VHYX[3] is HSIZE[8]; VHYX[7] is VSIZE[8]: 1000 1000
{0x5a, 0x50},
{0x5b, 0x3c},
{0x5c, 0x00},
{0xd3, 0x04},
{0x7f, 0x00},
{0xda, 0x00},
{0xe5, 0x1f},
{0xe1, 0x67},
{0xe0, 0x00},
{0xdd, 0x7f},
{0x05, 0x00},
{0xff, 0x00},
{0xe0, 0x04},
{0xc0, 0xa0},//图片长160
{0xc1, 0x78},//图片款120
{0x86, 0x3d},
{0x50, 0x92},
{0x51, 0x90},
{0x52, 0x2c},
{0x53, 0x00},
{0x54, 0x00},
{0x55, 0x88},
{0x57, 0x00},
{0x5a, 0x28},
{0x5b, 0x1E},
{0x5c, 0x00},
{0xd3, 0x08},
{0xe0, 0x00},
{0xFF, 0x00},
{0x05, 0x00},
{0xDA, 0x08},
{0xda, 0x09},
{0x98, 0x00},
{0x99, 0x00},
{0x00, 0x00},
};
/*****************mian函数的程式*****************/
DMA_Cmd(DMA2_Stream1, ENABLE);
while ( DMA_GetCmdStatus(DMA2_Stream1) != ENABLE );
DCMI_Cmd(ENABLE);
DCMI_CaptureCmd(ENABLE);
while(1);
/******************DCMI中断函数***********************/
void DCMI_IRQHandler(void)
{
/* DCMI overrun */
if ( DCMI_GetITStatus(DCMI_IT_OVF) != RESET) // Overflow interrupt mask
{
DCMI_ClearITPendingBit(DCMI_IT_OVF);
}
if ( DCMI_GetITStatus(DCMI_IT_FRAME) != RESET) // Frame capture complete interrupt mask
{
DCMI_flag=1;
DCMI_ClearITPendingBit(DCMI_IT_FRAME);
}
if ( DCMI_GetITStatus(DCMI_IT_ERR) != RESET) // Synchronization error interrupt mask
{
DCMI_ClearITPendingBit(DCMI_IT_ERR);
}
if ( DCMI_GetITStatus(DCMI_IT_LINE) != RESET) // Line interrupt mask
{
DCMI_ClearITPendingBit(DCMI_IT_LINE);
}
if ( DCMI_GetITStatus(DCMI_IT_VSYNC) != RESET) // Line interrupt mask
{
DCMI_ClearITPendingBit(DCMI_IT_VSYNC);
}
}
/***********************DMA中断函数***********************/
void DMA2_Stream1_IRQHandler(void)
{
if ( DMA_GetITStatus(DMA2_Stream1, DMA_IT_DMEIF1) != RESET)
{ // direct mode error interrupt
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_DMEIF1);
}
if ( DMA_GetITStatus(DMA2_Stream1, DMA_IT_FEIF1) != RESET)
{ // FIFO error interrupt
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_FEIF1);
}
if ( DMA_GetITStatus(DMA2_Stream1, DMA_IT_HTIF1) != RESET)
{ // half transfer complete interrupt
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_HTIF1);
}
if ( DMA_GetITStatus(DMA2_Stream1, DMA_IT_TCIF1) != RESET)
{ // transfer complete interrupt
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_TCIF1);
}
if ( DMA_GetITStatus(DMA2_Stream1, DMA_IT_TEIF1) != RESET)
{ // transfer error interrupt
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_TEIF1);
}
}
/******************实验结果说明******************/
虽然中断不正常,但是LCD上还是可以显示到一些奇怪的绿 {MOD}和黑 {MOD}的点,DCMI设置CaptureMode设置为连续模式,可以不断地刷出来奇怪的点的图片。
希望调试过的网友看看我的程式,可以帮帮我。
问题解决了,测试的时候从camera上面飞出来几根线,去掉之后就正常了。
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