structure.c

launchpad msp430官方示例

//******************************************************************************
//  RO_PINOSC_TA_WDTp example with the MSP430G2452
//  threshold and maxResponse values must be updated for electrode design,
//  system clock settings, selection of gate measurement source, and 
//  accumulation cycles
//******************************************************************************

#include "structure.h"

//PinOsc Volume down P2.2
const struct Element volume_down = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT2,
              // measured for a 1Mhz SMCLK
              .maxResponse = 121+655, // actual measure was 980
              .threshold = 121 

};      

//PinOsc forward right P2.3
const struct Element right = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT3,
              // 1Mhz SMCLK
              .maxResponse = 113+655,
              .threshold = 113 
};

//PinOsc Volume up, P2.4
const struct Element volume_up = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT4,
              // 1Mhz SMCLK
              .maxResponse = 118+655,
              .threshold = 118 
};      

//PinOsc reverse left P2.1
const struct Element left = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT1,
              // 1Mhz SMCLK
              .maxResponse = 111+655,
              .threshold = 111 
};      

//PinOsc Wheel: middle button P2.5
const struct Element middle_element = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT5,
              // When using an abstracted function to measure the element
              // the 100*(maxResponse - threshold) < 0xFFFF
              // ie maxResponse - threshold < 655
              .maxResponse = 350+655,
              .threshold = 350 
}; 

//PinOsc proximity: P2.0
const struct Element proximity_element = {

              .inputPxselRegister = (unsigned char *)&P2SEL,  
              .inputPxsel2Register = (unsigned char *)&P2SEL2,  
              .inputBits = BIT0,
              .maxResponse = 200,
              .threshold = 130 
};      

//*** Sensor   *******************************************************/
// This defines the grouping of sensors, the method to measure change in
// capacitance, and the function of the group

const struct Sensor wheel =
               { 
                  .halDefinition = RO_PINOSC_TA0_WDTp,
                  .numElements = 4,
                  .points = 16,
                  .sensorThreshold = 75,
                  .baseOffset = 0,
                  // Pointer to elements
                  .arrayPtr[0] = &volume_up,  // point to first element
                  .arrayPtr[1] = &right,  // point to first element
                  .arrayPtr[2] = &volume_down,  // point to first element
                  .arrayPtr[3] = &left,  // point to first element
                  // Timer Information
                  .measGateSource= GATE_WDT_SMCLK,     //  0->SMCLK, 1-> ACLK
                  //.accumulationCycles= WDTp_GATE_32768             //32768
                  .accumulationCycles= WDTp_GATE_8192               // 8192
                  //.accumulationCycles= WDTp_GATE_512             //512
                  //.accumulationCycles= WDTp_GATE_64             //64                  
               };

const struct Sensor middle_button =
               { 
                  .halDefinition = RO_PINOSC_TA0_WDTp,
                  .numElements = 1,
                  .baseOffset = 4,
                  // Pointer to elements
                  .arrayPtr[0] = &middle_element,  // point to first element
                  // Timer Information
                  .measGateSource= GATE_WDT_SMCLK,     //  0->SMCLK, 1-> ACLK
                  //.accumulationCycles= WDTp_GATE_32768             //32768
                  .accumulationCycles= WDTp_GATE_8192               // 8192
                  //.accumulationCycles= WDTp_GATE_512             //512
                  //.accumulationCycles= WDTp_GATE_64             //64                  
               };

const struct Sensor proximity_sensor =
               { 
                  .halDefinition = RO_PINOSC_TA0_WDTp,
                  .numElements = 1,
                  .baseOffset = 5,
                  // Pointer to elements
                  .arrayPtr[0] = &proximity_element,  // point to first element
                  // Timer Information
                  .measGateSource= GATE_WDT_SMCLK,     //  0->SMCLK, 1-> ACLK
                  //.accumulationCycles= WDTp_GATE_32768             //32768
                  .accumulationCycles= WDTp_GATE_8192               // 8192
                  //.accumulationCycles= WDTp_GATE_512             //512
                  //.accumulationCycles= WDTp_GATE_64             //64                  
               };