Diff: GridEye/GridEye.cpp

Revision:

23:f74a50977593

Child:

28:0ed92c590607

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GridEye/GridEye.cpp	Wed Jul 18 18:52:30 2018 +0000
@@ -0,0 +1,238 @@
+/**********************************************************************
+* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+
+#include "GridEye/GridEye.h"
+
+
+
+GridEye::GridEye(I2C &i2c)
+: m_i2cBus(i2c)
+{
+}
+
+
+
+
+//*********************************************************************
+int8_t GridEye::gridEyeReadReg(GridEyeRegister reg_addr, int num_bytes, char * data_buf)
+{    
+    int8_t result;
+    char read_pointer[1];
+    read_pointer[0] = reg_addr;
+            
+    result = GridEye::m_i2cBus.write(I2C_W_ADRS, read_pointer, 1);
+    if (result == I2C_WR_SUCCESS) 
+    { 
+        result = GridEye::m_i2cBus.read(I2C_R_ADRS, data_buf , num_bytes, false);
+        if (result == I2C_WR_SUCCESS)
+            return result;
+    }
+    return I2C_WR_ERROR;
+}
+
+
+
+//*********************************************************************
+int8_t GridEye::gridEyeWriteReg(GridEyeRegister reg_addr, int num_bytes, char * data_buf)
+{    
+    int8_t result;
+    int num_indices = num_bytes + 1;
+    char write_buffer[num_indices];
+    
+    //construct write buffer with the address followed by the data to be written
+    write_buffer[0] = reg_addr;
+    for (int idx=0; idx<num_bytes; idx++)
+        write_buffer[idx+1] = data_buf[idx];
+    
+    result = GridEye::m_i2cBus.write(I2C_W_ADRS, write_buffer, num_indices);
+    if (result == I2C_WR_SUCCESS)
+        return result;
+        
+    //else, return -1
+    return I2C_WR_ERROR;
+}
+
+
+//*********************************************************************
+int8_t GridEye::getThermistorTemperature(int16_t & therm_temp)
+{
+    int8_t result;
+    char data[2];
+    
+    result = this->gridEyeReadReg(GridEye::THERMISTOR_LOW, 2, data);
+    
+    if(result == I2C_WR_SUCCESS) 
+    {
+        convSingleRawTempData2Int(data, therm_temp);
+        return therm_temp;
+    }
+    return I2C_WR_ERROR;
+}
+ 
+ 
+//*********************************************************************    
+int8_t GridEye::getPixelTemperature(uint8_t pixel_addr, int16_t & pixel_temp)
+{
+    int8_t result;
+    char data[2];
+    
+    result = this->gridEyeReadReg((GridEyeRegister) pixel_addr, 2, data);
+    if(result == I2C_WR_SUCCESS)
+    {
+        convSingleRawTempData2Int(data, pixel_temp);
+        return pixel_temp;
+    }
+    return I2C_WR_ERROR;
+}
+ 
+ 
+//*********************************************************************
+int8_t GridEye::getRaw8x8FrameData(char * raw_frame_data)
+{
+    int8_t result;
+    result = gridEyeReadReg((GridEyeRegister) GridEye::PIXEL_BASE_ADRS, 128, raw_frame_data);
+    return result;
+}
+
+
+//*********************************************************************
+int8_t GridEye::setOperatingMode(GridEye::OperatingMode mode) 
+{
+    int8_t result;
+    char set_mode[1];
+    set_mode[0] = (char)mode;
+    result = this->gridEyeWriteReg(GridEye::OPERATING_MODE, 1, set_mode);
+    if (result == I2C_WR_SUCCESS)
+        return result;
+    return I2C_WR_ERROR;
+}
+        
+//*********************************************************************
+int8_t GridEye::setFrameRate(GridEye::FrameRate rate) 
+{
+    int8_t result;
+    char set_rate[1];
+    set_rate[0] = (char)rate;
+    result = this->gridEyeWriteReg(GridEye::FRAME_RATE, 1, set_rate);
+    if (result == I2C_WR_SUCCESS)
+        return result;
+    return I2C_WR_ERROR;
+}
+
+//*********************************************************************
+void convSingleRawTempData2Int(char * data, int16_t & pixel_temp) 
+{
+    int8_t upper_byte = data[1];
+    int8_t lower_byte = data[0];
+    int16_t upper_byte_mask = 0x0F00;
+    int16_t sign_bit = 0x0200;
+    int16_t finish_neg_val = 0xFC00;
+    int16_t pixel;
+    
+    //construct the pixel based  off the 12 bit signed  data
+    pixel = (upper_byte << 8);
+    pixel &= upper_byte_mask;
+    pixel |= lower_byte;
+    
+    //shift it over to gain integer value of the pixel
+    pixel = pixel >> 2;
+    
+    //if negative, properly convert to 16 bit int format to represent 2's compliment
+    if (pixel&sign_bit)
+        pixel |= finish_neg_val;
+    
+    //set the coresponding pixel to be in the passed in array
+    pixel_temp = pixel;
+}
+
+//*********************************************************************
+void convRaw8x8Data2Int(char * data, int16_t * frame_temp) {
+    int idx = 0;
+    int8_t upper_byte;
+    int8_t lower_byte;
+    int16_t upper_byte_mask = 0x0F00;
+    int16_t sign_bit = 0x0200;
+    int16_t finish_neg_val = 0xFC00;
+    int16_t pixel;
+    
+    for (idx=0; idx<64; idx++) 
+    {
+        //construct the pixel based  off the 12 bit signed  data
+        upper_byte = data[idx*2+1];
+        lower_byte = data[idx*2+0];
+        pixel = (upper_byte << 8);
+        pixel &= upper_byte_mask;
+        pixel |= lower_byte;
+        
+        //shift it over to gain integer value of the pixel
+        pixel = pixel >> 2;
+        
+        //if negative, properly convert to 16 bit int format to represent 2's compliment
+        if (pixel&sign_bit)
+            pixel |= finish_neg_val;
+        
+        //set the coresponding pixel to be in the passed in array
+        frame_temp[idx] = pixel;
+    }
+}
+
+//*********************************************************************
+void convRaw8x8Data2Point25degC(char * data, int16_t * frame_temp) 
+{
+    int idx = 0;
+    int8_t upper_byte;
+    int8_t lower_byte;
+    int16_t upper_byte_mask = 0x0F00;
+    int16_t sign_bit = 0x0800;
+    int16_t finish_neg_val = 0xF000;
+    int16_t pixel;
+    
+    for (idx=0; idx<64; idx++) 
+    {
+        //construct the pixel based  off the 12 bit signed  data
+        upper_byte = data[idx*2+1];
+        lower_byte = data[idx*2+0];
+        pixel = (upper_byte << 8);
+        pixel &= upper_byte_mask;
+        pixel |= lower_byte;
+        
+        //no shift needed since we would lose the two lsb that give 0.25*C precision
+        
+        //if negative, properly convert to 16 bit int format to represent 2's compliment
+        if (pixel & sign_bit)
+            pixel |= finish_neg_val;
+        
+        //set the coresponding pixel to be in the passed in array
+        frame_temp[idx] = pixel;
+    }
+}