src/libs/Pin.h

   1 #ifndef PIN_H
   2 #define PIN_H
   3
   4 #include <stdlib.h>
   5 #include "libs/LPC17xx/sLPC17xx.h" // smoothed mbed.h lib
   6 #include "libs/Kernel.h"
   7 #include "libs/utils.h"
   8 #include <string>
   9
  10 class Pin{
  11     public:
  12         Pin(){ }
  13
  14         Pin* from_string(std::string value){
  15             LPC_GPIO_TypeDef* gpios[5] ={LPC_GPIO0,LPC_GPIO1,LPC_GPIO2,LPC_GPIO3,LPC_GPIO4};
  16             if( value.find_first_of("n")!=string::npos ? true : false ){
  17                 this->port_number = 0;
  18                 this->port = gpios[(unsigned int) this->port_number];
  19                 this->inverting = false;
  20                 this->pin = 255;
  21             }else{
  22                 this->port_number =  atoi(value.substr(0,1).c_str());
  23                 this->port = gpios[(unsigned int) this->port_number];
  24                 this->inverting = ( value.find_first_of("!")!=string::npos ? true : false );
  25                 this->pin  = atoi( value.substr(2, value.size()-2-(this->inverting?1:0)).c_str() );
  26             }
  27             return this;
  28         }
  29
  30         inline bool connected(){
  31             if( this->pin == 255 ){ return false; }
  32             return true;
  33         }
  34
  35         inline Pin* as_output(){
  36             this->port->FIODIR |= 1<<this->pin;
  37             return this;
  38         }
  39
  40         inline Pin* as_input(){
  41             this->port->FIODIR &= ~(1<<this->pin);
  42             return this;
  43         }
  44
  45         inline Pin* as_open_drain(){
  46             if( this->port_number == 0 ){ LPC_PINCON->PINMODE_OD0 |= (1<<this->pin); }
  47             if( this->port_number == 1 ){ LPC_PINCON->PINMODE_OD1 |= (1<<this->pin); }
  48             if( this->port_number == 2 ){ LPC_PINCON->PINMODE_OD2 |= (1<<this->pin); }
  49             if( this->port_number == 3 ){ LPC_PINCON->PINMODE_OD3 |= (1<<this->pin); }
  50             if( this->port_number == 4 ){ LPC_PINCON->PINMODE_OD4 |= (1<<this->pin); }
  51             return this;
  52         }
  53
  54         inline Pin* pull_up(){
  55             // Set the two bits for this pin as 00
  56             if( this->port_number == 0 && this->pin < 16  ){ LPC_PINCON->PINMODE0 &= ~(3<<( this->pin    *2)); }
  57             if( this->port_number == 0 && this->pin >= 16 ){ LPC_PINCON->PINMODE1 &= ~(3<<((this->pin-16)*2)); }
  58             if( this->port_number == 1 && this->pin < 16  ){ LPC_PINCON->PINMODE2 &= ~(3<<( this->pin    *2)); }
  59             if( this->port_number == 1 && this->pin >= 16 ){ LPC_PINCON->PINMODE3 &= ~(3<<((this->pin-16)*2)); }
  60             if( this->port_number == 2 && this->pin < 16  ){ LPC_PINCON->PINMODE4 &= ~(3<<( this->pin    *2)); }
  61             if( this->port_number == 3 && this->pin >= 16 ){ LPC_PINCON->PINMODE7 &= ~(3<<((this->pin-16)*2)); }
  62             if( this->port_number == 4 && this->pin >= 16 ){ LPC_PINCON->PINMODE9 &= ~(3<<((this->pin-16)*2)); }
  63             return this;
  64         }
  65
  66         inline Pin* pull_down(){
  67             // Set the two bits for this pin as 00
  68             if( this->port_number == 0 && this->pin < 16  ){ LPC_PINCON->PINMODE0 |= (3<<( this->pin    *2)); }
  69             if( this->port_number == 0 && this->pin >= 16 ){ LPC_PINCON->PINMODE1 |= (3<<((this->pin-16)*2)); }
  70             if( this->port_number == 1 && this->pin < 16  ){ LPC_PINCON->PINMODE2 |= (3<<( this->pin    *2)); }
  71             if( this->port_number == 1 && this->pin >= 16 ){ LPC_PINCON->PINMODE3 |= (3<<((this->pin-16)*2)); }
  72             if( this->port_number == 2 && this->pin < 16  ){ LPC_PINCON->PINMODE4 |= (3<<( this->pin    *2)); }
  73             if( this->port_number == 3 && this->pin >= 16 ){ LPC_PINCON->PINMODE7 |= (3<<((this->pin-16)*2)); }
  74             if( this->port_number == 4 && this->pin >= 16 ){ LPC_PINCON->PINMODE9 |= (3<<((this->pin-16)*2)); }
  75             return this;
  76         }
  77
  78         inline bool get(){
  79             return this->inverting ^ (( this->port->FIOPIN >> this->pin ) & 1);
  80         }
  81
  82         inline void set(bool value){
  83             if( this->inverting ^ value ){
  84                 this->port->FIOSET = 1 << this->pin;
  85             }else{
  86                 this->port->FIOCLR = 1 << this->pin;
  87             }
  88         }
  89
  90         bool inverting;
  91         LPC_GPIO_TypeDef* port;
  92         char port_number;
  93         char pin;
  94 };
  95
  96
  97
  98
  99 #endif