CMOS_Sensor_ov7648.rar_bf533_识别小球

#include <cdefBF533.h> #include <ccblkfn.h> #include <sys/exception.h> #include "I2C.h" //------------------------------------------------------------------------------ // I2C Peripheral Function Prototypes //------------------------------------------------------------------------------ void Init(void); // Initialize I2C port void Start(void); // Sends I2C Start Trasfer void Stop(void); // Sends I2C Stop Trasfer bool Write(unsigned char data_out); // Writes data over the I2C bus bool Read(unsigned char *data_in, bool send_ack); // Reads data from the I2C bus void SetSCLK(bool state); // Set SCLK to <state> void SetSDATA(bool state); // Set SDATA to <state> bool GetSDATA(void); // Get SDATA state //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ // I2C Peripheral Variables //------------------------------------------------------------------------------ unsigned char IdentAddr = 0x00; unsigned int I2C_Delay = 0x00000000; //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ // Procedure: I2C_Init // Inputs: identaddr // Outputs: bool // Description: Initialize I2C and setup Slave Ident Addr. then check the ident // for response and returns true if ok. //------------------------------------------------------------------------------ bool I2C_Init(unsigned char identaddr) { bool ret; // Calculate Delay NEED FIX!!! I2C_Delay = ((*pPLL_CTL & 0x7e00) >> 9); //jiapeng change 9 to 8; if ((*pPLL_CTL & 0x0001) == 0x0001) I2C_Delay /= 2; //jiapeng adds it. I2C_Delay *= 2; IdentAddr = identaddr; Init(); // Initialize I2C port Start(); // Check Slave Ident Addr ret = Write(IdentAddr); Stop(); return ret; // Return true if Ident Addr. Ok } //------------------------------------------------------------------------------ // Procedure: I2C_Write // Inputs: data out, address // Outputs: bool // Description: Writes a byte to the given address and return status. //------------------------------------------------------------------------------ bool I2C_Write(unsigned char data_out, unsigned char address) { Start(); // Send start signal if (!Write(IdentAddr)) // Send identifier I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Write(address)) // Send address to device { Stop(); // Send I2C Stop Transfer return false; } if (!Write(data_out)) // Send byte to device { Stop(); // Send I2C Stop Transfer return false; } Stop(); // Send I2C Stop Transfer return true; } //------------------------------------------------------------------------------ // Procedure: I2C_Read // Inputs: *data_in, address // Outputs: bool // Description: Reads a byte from the given address and return status. //------------------------------------------------------------------------------ bool I2C_Read(unsigned char *data_in, unsigned char address) { Start(); // Send start signal if (!Write(IdentAddr)) // Send identifer I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Write(address)) // Send address to device { Stop(); // Send I2C Stop Transfer return false; } Start(); // Send I2C Start Transer if (!Write(IdentAddr+1)) // Send identifer I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Read(data_in, false)) // Read byte { Stop(); // Send I2C Stop Transfer return false; } Stop(); // Send I2C Stop Transfer return true; } //------------------------------------------------------------------------------ // Procedure: I2C_Write_16 // Inputs: data out, address // Outputs: bool // Description: Writes a byte to the given address and return status. //------------------------------------------------------------------------------ bool I2C_Write_16(unsigned char data_out_h,unsigned char data_out_l, unsigned char address) { Start(); // Send start signal Write(IdentAddr); // Send identifier I2C address Write(address); // Send address to device Write(data_out_h); // Send byte to device Write(data_out_l); Stop(); // Send I2C Stop Transfer return true; } //------------------------------------------------------------------------------ // Procedure: I2C_Read_16 // Inputs: *data_in, address // Outputs: bool // Description: Reads a byte from the given address and return status. //------------------------------------------------------------------------------ bool I2C_Read_16(unsigned char *data_in_h,unsigned char *data_in_l, unsigned char address) { Start(); // Send start signal Write(IdentAddr); // Send identifer I2C address Write(address); // Send address to device Stop(); Start(); // Send I2C Start Transer Write(IdentAddr+1); // Send identifer I2C address Read(data_in_h, true); // Read byte Read(data_in_l, false); Stop(); // Send I2C Stop Transfer return true; } /******************************************************** * * 函数名 : I2C_Write * 函数功能 : data out, address * 函数输入参数 : * 函数输出 : bool * 说明 : Writes a byte to the given address * and return status. ********************************************************/ bool SCCB_Write(unsigned char data_out, unsigned char address) { Start(); // Send start signal if (!Write(IdentAddr)) // Send identifier I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Write(address)) // Send address to device { Stop(); // Send I2C Stop Transfer return false; } if (!Write(data_out)) // Send byte to device { Stop(); // Send I2C Stop Transfer return false; } Stop(); // Send I2C Stop Transfer return true; } /******************************************************** * * 函数名 : I2C_Read * 函数功能 : *data_in, address * 函数输入参数 : * 函数输出 : bool * 说明 : Reads a byte from the given address * and return status. ********************************************************/ bool SCCB_Read(unsigned char *data_in, unsigned char address) { Start(); // Send start signal if (!Write(IdentAddr)) // Send identifer I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Write(address)) // Send address to device { Stop(); // Send I2C Stop Transfer return false; } Stop(); Start(); // Send I2C Start Transer if (!Write(IdentAddr+1)) // Send identifer I2C address { Stop(); // Send I2C Stop Transfer return false; } if (!Read(data_in, false)) // Read byte { Stop(); // Send I2C Stop Transfer return false; } Stop(); // Send I2C Stop Transfer return true; } //------------------------------------------------------------------------------ // I2C Functions - Master //------------------------------------------------------------------------------ //------------------------------------------------------------------------------ // Routine: Init // Inputs: none // Outputs: none // Purpose: Initialize I2C for the ADu812C //------------------------------------------------------------------------------ inline void Init(void) { *pFIO_DIR |= I2C_CLK; // Set SCLK as output and SDATA as input/high *pFIO_POLAR &= ~I2C_DATA; // Enable Active Hight *pFIO_EDGE &= ~I2C_DATA; // Enable Level Sensitivity *pFIO_INEN |= I2C_DATA; // Enable SDATA Input Buffer SetSDATA(1); // Set SDATA as input/high SetSCLK(1);