Kiran George Vetteth
Digital InOut
Digital_InOut.h
- Committer:
- kiran_mbed
- Date:
- 2014-06-12
- Revision:
- 0:b2ebb454185a
- Child:
- 1:b4bc3430a055
File content as of revision 0:b2ebb454185a:
/*
Test Code
#include "Digital_InOut.h"
DigitalOut myled(LED2);
int main() {
Digital_InOut toggle(p2_5,output);
Digital_InOut in(p0_9,input);
in.mode(pull_down);
Digital_InOut led2(p1_20,1,output);
toggle=1;
while(1) {
if(in.read()){
toggle.input();
toggle.mode(pull_down);
while(1){
if(toggle.read())
led2=1;
else
led2=0;
}
}
else
led2=0;
}
}
*/
#ifndef DIGITAL_IN_H
#define DIGITAL_IN_H
#include "mbed.h"
#define _PINSEL_BASE 0x4002C000
#define _FIODIR_BASE 0x2009C000
#define _PINMODE_BASE 0x4002C040
#define _FIOPIN_BASE 0x2009C014
#define _FIOSET_BASE 0x2009C018
#define _FIOCLR_BASE 0x2009C01C
#ifndef _PIN_
#define _PIN_
typedef struct
{
int port;
int pin;
}Pin;
#endif /* Pin */
#ifndef _PIN_NAME_
#define _PIN_NAME_
// Note many pins are not available as fully functional GPIOs, they are ommitted below
enum Pin_Name
{
p0_0 = 0,
p0_1 = 1,
p0_2 = 2,
p0_3 = 3,
p0_4 = 4,
p0_5 = 5,
p0_6 = 6,
p0_7 = 7,
p0_8 = 8,
p0_9 = 9,
p0_10 = 10,
p0_11 = 11,
/*p0_12 = 12,
p0_13 = 13,
p0_14 = 14,*/
p0_15 = 15,
p0_16 = 16,
p0_17 = 17,
p0_18 = 18,
p0_19 = 19,
p0_20 = 20,
p0_21 = 21,
p0_22 = 22,
p0_23 = 23,
p0_24 = 24,
p0_25 = 25,
p0_26 = 26,
/* p0_27 = 27,
p0_28 = 28,
p0_29 = 29,
p0_30 = 30,*/
p1_0 = 100,
p1_1 = 101,
/* p1_2 = 102,
p1_3 = 103,*/
p1_4 = 104,
/* p1_5 = 105,
p1_6 = 106,
p1_7 = 107,*/
p1_8 = 108,
p1_9 = 109,
p1_10 = 110,
/* p1_11 = 111,
p1_12 = 112,
p1_13 = 113,*/
p1_14 = 114,
p1_15 = 115,
p1_16 = 116,
p1_17 = 117,
p1_18 = 118,
p1_19 = 119,
p1_20 = 120,
p1_21 = 121,
p1_22 = 122,
p1_23 = 123,
p1_24 = 124,
p1_25 = 125,
p1_26 = 126,
p1_27 = 127,
p1_28 = 128,
p1_29 = 129,
p1_30 = 130,
p2_0 = 200,
p2_1 = 201,
p2_2 = 202,
p2_3 = 203,
p2_4 = 204,
p2_5 = 205,
p2_6 = 206,
p2_7 = 207,
p2_8 = 208,
p2_9 = 209,
p2_10 = 210,
p2_11 = 211,
p2_12 = 212,
p2_13 = 213,
/* p2_14 = 214,
p2_15 = 215,
p2_16 = 216,
p2_17 = 217,
p2_18 = 218,
p2_19 = 219,
p2_20 = 220,
p2_21 = 221,
p2_22 = 222,
p2_23 = 223,
p2_24 = 224,
p2_25 = 225,
p2_26 = 226,
p2_27 = 227,
p2_28 = 228,
p2_29 = 229,
p2_30 = 230,*/
/* p3_0 = 300,
p3_1 = 301,
p3_2 = 302,
p3_3 = 303,
p3_4 = 304,
p3_5 = 305,
p3_6 = 306,
p3_7 = 307,
p3_8 = 308,
p3_9 = 309,
p3_10 = 310,
p3_11 = 311,
p3_12 = 312,
p3_13 = 313,
p3_14 = 314,
p3_15 = 315,
p3_16 = 316,
p3_17 = 317,
p3_18 = 318,
p3_19 = 319,
p3_20 = 320,
p3_21 = 321,
p3_22 = 322,
p3_23 = 323,
p3_24 = 324,*/
p3_25 = 325,
p3_26 = 326,
/*p3_27 = 327,
p3_28 = 328,
p3_29 = 329,
p3_30 = 330,*/
/*p4_0 = 400,
p4_1 = 401,
p4_2 = 402,
p4_3 = 403,
p4_4 = 404,
p4_5 = 405,
p4_6 = 406,
p4_7 = 407,
p4_8 = 408,
p4_9 = 409,
p4_10 = 410,
p4_11 = 411,
p4_12 = 412,
p4_13 = 413,
p4_14 = 414,
p4_15 = 415,
p4_16 = 416,
p4_17 = 417,
p4_18 = 418,
p4_19 = 419,
p4_20 = 420,
p4_21 = 421,
p4_22 = 422,
p4_23 = 423,
p4_24 = 424,
p4_25 = 425,
p4_26 = 426,
p4_27 = 427,*/
p4_28 = 428,
p4_29 = 429,
/*p4_30 = 430*/
};
#endif /* Pin_Name */
enum Pin_Mode
{
pull_up = 0,
pull_down = 1,
neither = 2,
repeater = 3
};
enum Pin_Direction
{
input = 0,
output = 1
};
class Digital_InOut
{
private: Pin _pin;
bool _Dir;
public: Digital_InOut(Pin_Name IPin, Pin_Direction IDir)
{
_pin.port=(IPin/100);
_pin.pin=(IPin%100);
const int PINSELx = ((_pin.port*2) + (1* (_pin.pin > 15) ? 1:0));
const int FIODIRx = _pin.port;
*(uint32_t*)(_PINSEL_BASE + (PINSELx*4)) &= ~(1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //GPIO
if(!IDir)
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) &= ~(1 << _pin.pin); //Input
else
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) |= (1 << _pin.pin); //Output
_Dir=IDir;
}
Digital_InOut(Pin_Name IPin, Pin_Mode value, Pin_Direction IDir)
{
_pin.port=(IPin/100);
_pin.pin=(IPin%100);
const int PINSELx = ((_pin.port*2) + (1* (_pin.pin > 15) ? 1:0));
const int PINMODEx = ((_pin.port*2) + (1* (_pin.pin > 15) ? 1:0));
const int FIODIRx = _pin.port;
*(uint32_t*)(_PINSEL_BASE + (PINSELx*4)) &= ~(1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //GPIO
_Dir=IDir;
if(!_Dir)
{
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) &= ~(1 << _pin.pin); //Input
if(value==0)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //PULL_UP
}
else if(value==1)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //PULL_DOWN
}
else if(value==2)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << (((_pin.pin%16)*2)+1) ); //NEITHER
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << ((_pin.pin%16)*2)); //NEITHER
}
else if(value==3)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << (((_pin.pin%16)*2)+1) ); //REPEATER
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << ((_pin.pin%16)*2)); //REPEATER
}
}
}
Digital_InOut(Pin_Name IPin, int value, Pin_Direction IDir)
{
_pin.port=(IPin/100);
_pin.pin=(IPin%100);
const int PINSELx = ((_pin.port*2) + (1* (_pin.pin > 15) ? 1:0));
const int FIODIRx = _pin.port;
_Dir=IDir;
*(uint32_t*)(_PINSEL_BASE + (PINSELx*4)) &= ~(1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //GPIO
if(_Dir)
{
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) |= (1 << _pin.pin); //Output
*(uint32_t*)((_FIOSET_BASE*value) + (_FIOCLR_BASE*(1-value)) + (_pin.port*0x20)) |= (1 << _pin.pin); //Write
}
}
void input()
{
const int FIODIRx = _pin.port;
int value=0;
*(uint32_t*)((_FIOSET_BASE*value)+(_FIOCLR_BASE*(1-value)) + (_pin.port*0x20)) |= (1 << _pin.pin); //Reset
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) &= ~(1 << _pin.pin); //Input //Output
_Dir=0;
}
void output()
{
const int FIODIRx = _pin.port;
*(uint32_t*)(_FIODIR_BASE + (FIODIRx*0x20)) |= (1 << _pin.pin); //Output
_Dir=1;
}
int read()
{
return ((*(uint32_t*)(_FIOPIN_BASE +_pin.port*0x20) & (1 << _pin.pin)) >> _pin.pin); //Read
}
void write(int value)
{
if(_Dir)
{
if (value != 1 && value != 0) return;
*(uint32_t*)((_FIOSET_BASE*value)+(_FIOCLR_BASE*(1-value)) + (_pin.port*0x20)) |= (1 << _pin.pin); //Write
}
}
Digital_InOut& operator= (int value)
{
write(value);
return *this;
}
Digital_InOut& operator= (Digital_InOut& rhs)
{
write(rhs.read());
return *this;
}
void mode(Pin_Mode value)
{
const int PINMODEx = ((_pin.port*2) + (1* (_pin.pin > 15) ? 1:0));
if(!_Dir)
{
if(value==0)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //PULL_UP
}
else if(value==1)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << ((_pin.pin%16)*2) | (1 << (((_pin.pin%16)*2)+1))); //PULL_DOWN
}
else if(value==2)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << (((_pin.pin%16)*2)+1) ); //NEITHER
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << ((_pin.pin%16)*2)); //NEITHER
}
else if(value==3)
{
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) &= ~(1 << (((_pin.pin%16)*2)+1) ); //REPEATER
*(uint32_t*)(_PINMODE_BASE + (PINMODEx*4)) |= (1 << ((_pin.pin%16)*2)); //REPEATER
}
}
}
operator int()
{
return read();
}
};
#endif /* DIGITAL_IN_H */