基于STM32+OV9655_Camera的二維碼解碼源碼

ID:411153 · 發(fā)表于 2018-10-17 15:34

大神寫的基于STM32的二維碼解碼的程序源碼
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單片機(jī)源程序如下:

/**
******************************************************************************
* @file OV9655_Camera/src/main.c
* @author MCD Application Team
* @version V1.0.0
* @date 18-April-2011
* @brief Main program body.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© Portions COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/**
******************************************************************************
* <h2><center>© Portions COPYRIGHT 2012 Embest Tech. Co., Ltd.</center></h2>
* @file main.c
* @author CMP Team
* @version V1.0.0
* @date 28-December-2012
* @brief Main program body.
* Modified to support the STM32F4DISCOVERY, STM32F4DIS-BB, STM32F4DIS-CAM
* and STM32F4DIS-LCD modules.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, Embest SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
* OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
* CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx.h"
#include "stm32f4_discovery.h"
#include "stm32f4_discovery_lcd.h"
#include "stm32f4_discovery_lis302dl.h"
#include "main.h"
#include "bmp.h"
#include "dcmi_ov9655.h"
/** @addtogroup STM32F4xx_StdPeriph_Examples
* @{
*/
/** @addtogroup DCMI_OV9655_Camera
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define DCMI_DR_ADDRESS 0x50050028
#define FSMC_LCD_ADDRESS 0x60100000
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint8_t KeyPressFlg = 0;
__IO uint32_t TimingDelay;
__IO uint32_t SysTickLimit;
__IO uint64_t CycleCounter;
__IO int newFrame;
RCC_ClocksTypeDef RCC_Clocks;
EXTI_InitTypeDef EXTI_InitStructure;
uint8_t capture_Flag = ENABLE;
#define CAMERA_WIDTH 640
#define CAMERA_HEIGHT 480
#define HORIZONTAL_SCALE_FACTOR 2
#define VERTICAL_SCALE_FACTOR 2
uint8_t pbuffer1[CAMERA_WIDTH * 8 * 2];
uint8_t pbuffer2[CAMERA_WIDTH * 8 * 2];
static int blockRowsWritten;
// TODO: put these in a proper place
extern void cppInit(int width, int height);
extern void cppResetBinarizer(void);
extern void cppProcessBlockRow(uint8_t *blockRow);
extern uint8_t *cppGetResults(void);
extern int read_image(void);
/* Private function prototypes -----------------------------------------------*/
uint8_t DCMI_OV9655Config(void);
void DCMI_Config(void);
void I2C1_Config(void);
void EXTILine0_Config(void);
void LIS302DL_Reset(void);
void DisplayBinarizedFrame(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f4xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
/* SysTick end of count event each 10ms */
RCC_GetClocksFreq(&RCC_Clocks);
SysTickLimit = RCC_Clocks.HCLK_Frequency / 1000;
SysTick_Config(SysTickLimit);
cppInit(CAMERA_WIDTH, CAMERA_HEIGHT);
LIS302DL_Reset();
/* SET USER Key */
/* Configure EXTI Line0 (connected to PA0 pin) in interrupt mode */
EXTILine0_Config();
/* Initialize the LCD */
STM32f4_Discovery_LCD_Init();
LCD_Clear(LCD_COLOR_WHITE);
LCD_SetTextColor(LCD_COLOR_BLUE);
DCMI_Control_IO_Init();
LCD_DisplayStringLine(LINE(2), " Camera Init..");
/* OV9655 Camera Module configuration */
if (DCMI_OV9655Config() == 0x00)
{
LCD_DisplayStringLine(LINE(2), " ");
LCD_SetDisplayWindow(0, 0, 320, 240);
LCD_WriteRAM_Prepare();
/* Start Image capture and Display on the LCD *****************************/
/* Enable DMA transfer */
DMA_Cmd(DMA2_Stream1, ENABLE);
/* Enable DCMI interface */
DCMI_Cmd(ENABLE);
/* Start Image capture */
DCMI_CaptureCmd(ENABLE);
/*init the picture count*/
init_picture_count();
KeyPressFlg = 0;
while (1)
{
/* Insert 100ms delay */
//Delay(100);
if (newFrame) {
/* Processing of the frame will probably require more than the Vblank
* interval, in which case the binarized frame will be partially
* overwritten by the next one. That doesn't really matter as long
* as there is not much motion. */
DisplayBinarizedFrame();
read_image();
newFrame = 0;
}
if (KeyPressFlg) {
KeyPressFlg = 0;
/* press user KEY take a photo */
if (capture_Flag == ENABLE) {
DCMI_CaptureCmd(DISABLE);
capture_Flag = DISABLE;
//Capture_Image_TO_Bmp();
Delay(100);
LCD_SetDisplayWindow(0, 0, 320, 240);
LCD_WriteRAM_Prepare();
DCMI_CaptureCmd(ENABLE);
capture_Flag = ENABLE;
}
}
}
} else {
LCD_SetTextColor(LCD_COLOR_RED);
LCD_DisplayStringLine(LINE(2), "Camera Init.. fails");
LCD_DisplayStringLine(LINE(4), "Check the Camera HW ");
LCD_DisplayStringLine(LINE(5), " and try again ");
/* Go to infinite loop */
while (1);
}
}
extern void fastDisplayBinarizedRow(uint16_t *out, uint8_t *in, uint32_t count);
#define SCALE_DOWN_FACTOR 2
void DisplayBinarizedFrame(void) {
uint8_t *results = cppGetResults();
/* It's not worth trying to optimise this loop. Profiling has revealed that
* the majority of time is spent waiting for the LCD. */
// Uncomment this block to rescale image
for (int y = 0; y < CAMERA_HEIGHT; y += SCALE_DOWN_FACTOR) {
for (int x = 0; x < CAMERA_WIDTH; x += 8) {
uint8_t el = results[(y * CAMERA_WIDTH + x) >> 3];
for (int j = 0; j < 8; j += SCALE_DOWN_FACTOR) {
*(uint16_t *)FSMC_LCD_ADDRESS = el & 1 ? 0: 0xffff;
el >>= SCALE_DOWN_FACTOR;
}
}
}
// Uncomment this block to zoom in on middle
/*for (int y = 120; y < 360; y++) {
for (int x = 160; x < 480; x += 8) {
uint8_t el = results[(y * CAMERA_WIDTH + x) >> 3];
for (int j = 0; j < 8; j++) {
*(uint16_t *)FSMC_LCD_ADDRESS = el & 1 ? 0: 0xffff;
el >>= 1;
}
}
}*/
}
/**
* @brief Configures all needed resources (I2C, DCMI and DMA) to interface with
* the OV9655 camera module
* @param None
* @retval 0x00 Camera module configured correctly
* 0xFF Camera module configuration failed
*/
uint8_t DCMI_OV9655Config(void)
{
/* I2C1 will be used for OV9655 camera configuration */
I2C1_Config();
/* Reset and check the presence of the OV9655 camera module */
if (DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS,0x12, 0x80))
{
return (0xFF);
}
///* OV9655 Camera size setup */
DCMI_OV9655_VGASizeSetup();
///* Set the RGB565 mode */
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM7, 0x63);
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM15, 0x10);
///* Set the Raw RGB mode */
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM7, 0x60);
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM15, 0xc0);
/* Set the YUV mode */
DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM7, 0x62);
DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_TSLB, 0xc0);
DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM15, 0xc0);
///* Enable colour bar test mode */
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM3, 0x80);
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM20, 0x10);
/* Enable night mode */
// Actually, night mode seems to be a bad idea; it makes motion blur
// much worse while reducing noise only a little bit.
//DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM11, 0xe4);
/* Invert the HRef signal*/
DCMI_SingleRandomWrite(OV9655_DEVICE_WRITE_ADDRESS, OV9655_COM10, 0x08);
/* Configure the DCMI to interface with the OV9655 camera module */
DCMI_Config();
return (0x00);
}
volatile static uint64_t last;
//static int ccc;
uint64_t getCycleCounter(void) {
return CycleCounter + (uint64_t)(SysTickLimit - 1 - SysTick->VAL);
}
extern void extractLuminance(uint8_t *out, uint8_t *in, uint32_t count);
void DMA2_Stream1_IRQHandler(void)
{
if (DMA_GetITStatus(DMA2_Stream1, DMA_IT_TCIF1) != RESET) {
uint8_t *p;
uint8_t luminances[CAMERA_WIDTH * 8];
if (DMA_GetCurrentMemoryTarget(DMA2_Stream1) == DMA_Memory_0) {
p = pbuffer2;
} else {
p = pbuffer1;
}
/*for (int y = 0; y < 8; y += VERTICAL_SCALE_FACTOR) {
//if (y & 1) continue;
for (int x = 0; x < CAMERA_WIDTH; x += HORIZONTAL_SCALE_FACTOR) {
// extract Y component and convert to RGB565 greyscale
uint32_t yuv = *(uint8_t *)&(p[x * 2]);
uint16_t t1 = yuv >> 2;
uint16_t t2 = yuv >> 3;
uint16_t rgb = (t2 << 11) | (t1 << 5) | (t2);
//uint16_t rgb = yuv > 0x80 ? 0xffff: 0;
*(uint16_t *)FSMC_LCD_ADDRESS = rgb;
// luminances[i] = p[i * 2];
}
p += (CAMERA_WIDTH * 2 * VERTICAL_SCALE_FACTOR);
}*/
/*if ((blockRowsWritten >= 20) && (blockRowsWritten < 50))
{
for (int y = 0; y < 8; y++) {
//if (y & 1) continue;
for (int x = 160; x < 480; x ++) {
// extract Y component and convert to RGB565 greyscale
uint32_t yuv = *(uint8_t *)&(p[x * 2]);
uint16_t t1 = yuv >> 2;
uint16_t t2 = yuv >> 3;
uint16_t rgb = (t2 << 11) | (t1 << 5) | (t2);
*(uint16_t *)FSMC_LCD_ADDRESS = rgb;
}
p += (CAMERA_WIDTH * 2);
}
}*/
extractLuminance(luminances, p, sizeof(luminances));
//uint64_t current = getCycleCounter();
//uint64_t diff = current - last;
//last = current;
//char s[32];
//sprintf(s, "%u ", (unsigned int)diff);
//LCD_DisplayStringLine(LINE(blockRowsWritten), s);
//blockRowsWritten = (blockRowsWritten + 1) % 6;
//sprintf(s, "%d %d ", (int)ccc / 30, (int)ccc++);
cppProcessBlockRow(luminances);
blockRowsWritten++;
if (blockRowsWritten >= (CAMERA_HEIGHT >> 3)) {
newFrame = 1;
cppResetBinarizer();
blockRowsWritten = 0;
}
//LCD_DisplayStringLine(LINE(7), s);
DMA_ClearITPendingBit(DMA2_Stream1, DMA_IT_TCIF1);
}
}
/**
* @brief Configures the I2C1 used for OV9655 camera module configuration.
* @param None
* @retval None
*/
void I2C1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStruct;
/* I2C1 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
/* GPIOB clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
/* Connect I2C1 pins to AF4 ************************************************/
GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_I2C1);
/* Configure I2C1 GPIOs *****************************************************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
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 I2C1 ***********************************************************/
/* I2C DeInit */
I2C_DeInit(I2C1);
/* Enable the I2C peripheral */
I2C_Cmd(I2C1, ENABLE);
/* 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(I2C1, &I2C_InitStruct);
}
/**
* @brief Configures the DCMI to interface with the OV9655 camera module.
* @param None
* @retval None
*/
void DCMI_Config(void)
{
DCMI_InitTypeDef DCMI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
DCMI_CROPInitTypeDef DCMI_CropInitStructure;
/* Enable DCMI GPIOs clocks */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOE |
RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOA, ENABLE);
/* Enable DCMI clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI, ENABLE);
/* Connect DCMI pins to AF13 ************************************************/
/* PCLK */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_DCMI);
/* D0-D7 */
GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource0, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource1, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource4, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource5, GPIO_AF_DCMI);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource6, GPIO_AF_DCMI);
/* VSYNC */
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_DCMI);
/* HSYNC */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_DCMI);
/* DCMI GPIO configuration **************************************************/
/* D0 D1(PC6/7) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
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(GPIOC, &GPIO_InitStructure);
/* D2..D4(PE0/1/4) D6/D7(PE5/6) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1
| GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* D5(PB6), VSYNC(PB7) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* PCLK(PA6) HSYNC(PA4)*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* DCMI configuration *******************************************************/
DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_Continuous;
DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Falling;
DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_High;
DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_High;
DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;
DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;
// All horizontal crop values are multiplied by 2 because there are 2
// pixel clocks per pixel.
DCMI_CropInitStructure.DCMI_VerticalStartLine = 0;
DCMI_CropInitStructure.DCMI_HorizontalOffsetCount = 0;
#ifdef CROP_LAST_BLOCK_ROW
DCMI_CropInitStructure.DCMI_VerticalLineCount = CAMERA_HEIGHT - 8;
#else
DCMI_CropInitStructure.DCMI_VerticalLineCount = CAMERA_HEIGHT;
#endif
DCMI_CropInitStructure.DCMI_CaptureCount = CAMERA_WIDTH * 2;
// According to the STM32F4 reference manual, the counts in the registers
// are 1 less than the actual count.
DCMI_CropInitStructure.DCMI_CaptureCount--;
DCMI_CropInitStructure.DCMI_VerticalLineCount--;
DCMI_Init(&DCMI_InitStructure);
DCMI_CROPConfig(&DCMI_CropInitStructure);
DCMI_CROPCmd(ENABLE);
/* DMA2 interrupt configuration */
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Configures the DMA2 to transfer Data from DCMI to the LCD ****************/
/* Enable DMA2 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
/* DMA2 Stream1 Configuration */
DMA_DeInit(DMA2_Stream1);
DMA_InitStructure.DMA_Channel = DMA_Channel_1;
DMA_InitStructure.DMA_PeripheralBaseAddr = DCMI_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)pbuffer1;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = sizeof(pbuffer1) / sizeof(uint32_t);
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_Init(DMA2_Stream1, &DMA_InitStructure);
DMA_DoubleBufferModeConfig(DMA2_Stream1, (uint32_t)pbuffer2, DMA_Memory_0);
DMA_DoubleBufferModeCmd(DMA2_Stream1, ENABLE);
DMA_ITConfig(DMA2_Stream1, DMA_IT_TC, ENABLE);
}
/**
* @brief
* @param None
* @retval None
*/
void LIS302DL_Reset(void)
{
uint8_t ctrl = 0;
LIS302DL_InitTypeDef LIS302DL_InitStruct;
LIS302DL_InterruptConfigTypeDef LIS302DL_InterruptStruct;
/* Set configuration of LIS302DL*/
LIS302DL_InitStruct.Power_Mode = LIS302DL_LOWPOWERMODE_ACTIVE;
LIS302DL_InitStruct.Output_DataRate = LIS302DL_DATARATE_100;
LIS302DL_InitStruct.Axes_Enable = LIS302DL_X_ENABLE | LIS302DL_Y_ENABLE | LIS302DL_Z_ENABLE;
LIS302DL_InitStruct.Full_Scale = LIS302DL_FULLSCALE_2_3;
LIS302DL_InitStruct.Self_Test = LIS302DL_SELFTEST_NORMAL;
LIS302DL_Init(&LIS302DL_InitStruct);
/* Set configuration of Internal High Pass Filter of LIS302DL*/
LIS302DL_InterruptStruct.Latch_Request = LIS302DL_INTERRUPTREQUEST_LATCHED;
LIS302DL_InterruptStruct.SingleClick_Axes = LIS302DL_CLICKINTERRUPT_Z_ENABLE;
LIS302DL_InterruptStruct.DoubleClick_Axes = LIS302DL_DOUBLECLICKINTERRUPT_Z_ENABLE;
LIS302DL_InterruptConfig(&LIS302DL_InterruptStruct);
/* Required delay for the MEMS Accelerometre: Turn-on time = 3/Output data Rate
= 3/100 = 30ms */
Delay(30);
/* Configure Click Window */
ctrl = 0xC0;
LIS302DL_Write(&ctrl, LIS302DL_CLICK_CTRL_REG3_ADDR, 1);
}
/**
* @brief MEMS accelerometre management of the timeout situation.
* @param None.
* @retval None.
*/
uint32_t LIS302DL_TIMEOUT_UserCallback(void)
{
/* MEMS Accelerometer Timeout error occured */
while (1) ;
}
/**
* @brief Configures EXTI Line0 (connected to PA0 pin) in interrupt mode
* @param None
* @retval None
*/
void EXTILine0_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIOA clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Configure PA0 pin as input floating */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Connect EXTI Line0 to PA0 pin */
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
/* Configure EXTI Line0 */
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI Line0 Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Inserts a delay time.
* @param nTime: specifies the delay time length, in milliseconds
* @retval None
*/
void Delay(uint32_t nTime)
{
TimingDelay = nTime;
while (TimingDelay != 0);
}
/**
* @brief Decrements the TimingDelay variable.
* @param None
* @retval None
*/
void TimingDelay_Decrement(void)
{
CycleCounter += SysTickLimit;
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/*********** Portions COPYRIGHT 2012 Embest Tech. Co., Ltd.*****END OF FILE****/

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STM32 二維碼解碼.zip (1.5 MB, 下載次數(shù): 28)

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