Alex Whittemore / Mbed 2 deprecated BURTDAQ

Program to run data acquisition and control for BU Rocket Team's MKII hybrid rocket motor

Dependencies:   mbed

FastIO.h@0:7fd45d2b5926, 2012-04-09 (annotated)

Committer:
alexwhittemore
Date:
Mon Apr 09 16:39:50 2012 +0000
Revision:
0:7fd45d2b5926
For some reason, this thing wont run serial interrupts and threads simultaneously without locking up.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alexwhittemore 0:7fd45d2b5926 1 #ifndef __FAST_IO_H
alexwhittemore 0:7fd45d2b5926 2 #define __FAST_IO_H
alexwhittemore 0:7fd45d2b5926 3
alexwhittemore 0:7fd45d2b5926 4 #include "mbed.h"
alexwhittemore 0:7fd45d2b5926 5
alexwhittemore 0:7fd45d2b5926 6 // Super-fast DigitalOut-like class for mbed
alexwhittemore 0:7fd45d2b5926 7 // by Igor Skochinsky
alexwhittemore 0:7fd45d2b5926 8
alexwhittemore 0:7fd45d2b5926 9 // includes FastOut, FastPortOut and MaskedPortOut classes
alexwhittemore 0:7fd45d2b5926 10 // usage:
alexwhittemore 0:7fd45d2b5926 11 // FastOut<LED2> led2;
alexwhittemore 0:7fd45d2b5926 12 // FastPortOut<Port0, LED_MASK> ledport2;
alexwhittemore 0:7fd45d2b5926 13 // MaskedPortOut<Port0, LED_MASK> ledport3;
alexwhittemore 0:7fd45d2b5926 14 // led2 = 1;
alexwhittemore 0:7fd45d2b5926 15 // ledport2 = LED_MASK;
alexwhittemore 0:7fd45d2b5926 16 // ledport3 = LED_MASK;
alexwhittemore 0:7fd45d2b5926 17 // MaskedPortOut works the same way as FastPortOut, but it pre-sets the pin mask so that write can be done in one operation
alexwhittemore 0:7fd45d2b5926 18 // this makes things faster but you can't control other pins of the port, even with other classes
alexwhittemore 0:7fd45d2b5926 19
alexwhittemore 0:7fd45d2b5926 20
alexwhittemore 0:7fd45d2b5926 21 // pin definitions in PinNames.h start from LPC_GPIO0_BASE for P0_0 and there are 32 pins to a port (0 to 31)
alexwhittemore 0:7fd45d2b5926 22 // Thus:
alexwhittemore 0:7fd45d2b5926 23 // pin = LPC_GPIO0_BASE + port * 32 + bit
alexwhittemore 0:7fd45d2b5926 24 // port = (pin - LPC_GPIO0_BASE) / 32
alexwhittemore 0:7fd45d2b5926 25 // bit = (pin - LPC_GPIO0_BASE) % 32
alexwhittemore 0:7fd45d2b5926 26
alexwhittemore 0:7fd45d2b5926 27 #define PORTNO(pin) (((pin) - P0_0)/32)
alexwhittemore 0:7fd45d2b5926 28 #define BITNO(pin) (((pin) - P0_0)%32)
alexwhittemore 0:7fd45d2b5926 29
alexwhittemore 0:7fd45d2b5926 30 // calculate the GPIO port definition for the pin
alexwhittemore 0:7fd45d2b5926 31 // we rely on the fact that port structs are 0x20 bytes apart
alexwhittemore 0:7fd45d2b5926 32 #define PORTDEF(pin) ((LPC_GPIO_TypeDef*)(LPC_GPIO0_BASE + PORTNO(pin)*0x20))
alexwhittemore 0:7fd45d2b5926 33
alexwhittemore 0:7fd45d2b5926 34 #define PORTDEFPORT(port) ((LPC_GPIO_TypeDef*)(LPC_GPIO0_BASE + port*0x20))
alexwhittemore 0:7fd45d2b5926 35
alexwhittemore 0:7fd45d2b5926 36 // calculate the mask for the pin's bit in the port
alexwhittemore 0:7fd45d2b5926 37 #define PINMASK(pin) (1UL << BITNO(pin))
alexwhittemore 0:7fd45d2b5926 38
alexwhittemore 0:7fd45d2b5926 39 // each port takes two PINSEL registers (8 bytes or 64 bits)
alexwhittemore 0:7fd45d2b5926 40 // so there are 16 pins per PINSEL
alexwhittemore 0:7fd45d2b5926 41 #define PINSELREG(pin) (*(volatile uint32_t*)(LPC_PINCON_BASE + 4*(((pin) - P0_0)/16)))
alexwhittemore 0:7fd45d2b5926 42 #define PINSELMASK(pin, v) (v << (((pin - P0_0)%16)*2) )
alexwhittemore 0:7fd45d2b5926 43
alexwhittemore 0:7fd45d2b5926 44 // usage: FastOut<LED2> led2;
alexwhittemore 0:7fd45d2b5926 45 // then use the same assignment operators as with DigitalOut
alexwhittemore 0:7fd45d2b5926 46 template <PinName pin> class FastOut
alexwhittemore 0:7fd45d2b5926 47 {
alexwhittemore 0:7fd45d2b5926 48 public:
alexwhittemore 0:7fd45d2b5926 49 FastOut()
alexwhittemore 0:7fd45d2b5926 50 {
alexwhittemore 0:7fd45d2b5926 51 // set PINSEL bits to 0b00 (GPIO)
alexwhittemore 0:7fd45d2b5926 52 PINSELREG(pin) &= ~PINSELMASK(pin, 3);
alexwhittemore 0:7fd45d2b5926 53 // set FIODIR bit to 1 (output)
alexwhittemore 0:7fd45d2b5926 54 PORTDEF(pin)->FIODIR |= PINMASK(pin);
alexwhittemore 0:7fd45d2b5926 55 }
alexwhittemore 0:7fd45d2b5926 56 void write(int value)
alexwhittemore 0:7fd45d2b5926 57 {
alexwhittemore 0:7fd45d2b5926 58 if ( value )
alexwhittemore 0:7fd45d2b5926 59 PORTDEF(pin)->FIOSET = PINMASK(pin);
alexwhittemore 0:7fd45d2b5926 60 else
alexwhittemore 0:7fd45d2b5926 61 PORTDEF(pin)->FIOCLR = PINMASK(pin);
alexwhittemore 0:7fd45d2b5926 62 }
alexwhittemore 0:7fd45d2b5926 63 int read()
alexwhittemore 0:7fd45d2b5926 64 {
alexwhittemore 0:7fd45d2b5926 65 return PORTDEF(pin)->FIOPIN & PINMASK(pin) != 0;
alexwhittemore 0:7fd45d2b5926 66 }
alexwhittemore 0:7fd45d2b5926 67 FastOut& operator= (int value) { write(value); return *this; };
alexwhittemore 0:7fd45d2b5926 68 FastOut& operator= (FastOut& rhs) { return write(rhs.read()); };
alexwhittemore 0:7fd45d2b5926 69 operator int() { return read(); };
alexwhittemore 0:7fd45d2b5926 70 };
alexwhittemore 0:7fd45d2b5926 71
alexwhittemore 0:7fd45d2b5926 72 #define PINSELREG(pin) (*(volatile uint32_t*)(LPC_PINCON_BASE + 4*(((pin) - P0_0)/16)))
alexwhittemore 0:7fd45d2b5926 73 #define PINSELMASK(pin, v) (v << (((pin - P0_0)%16)*2) )
alexwhittemore 0:7fd45d2b5926 74
alexwhittemore 0:7fd45d2b5926 75 // usage: FastPortOut<Port0, mask> led2;
alexwhittemore 0:7fd45d2b5926 76 // then use the same assignment operators as with DigitalOut
alexwhittemore 0:7fd45d2b5926 77 template <enum PortName port, uint32_t mask = 0xFFFFFFFF> class FastPortOut
alexwhittemore 0:7fd45d2b5926 78 {
alexwhittemore 0:7fd45d2b5926 79 public:
alexwhittemore 0:7fd45d2b5926 80 FastPortOut()
alexwhittemore 0:7fd45d2b5926 81 {
alexwhittemore 0:7fd45d2b5926 82 // init pins selected by the mask
alexwhittemore 0:7fd45d2b5926 83 uint32_t pin = LPC_GPIO0_BASE + port * 32;
alexwhittemore 0:7fd45d2b5926 84 for ( uint32_t pinmask = mask; pinmask !=0; pinmask >>= 1 )
alexwhittemore 0:7fd45d2b5926 85 {
alexwhittemore 0:7fd45d2b5926 86 if ( pinmask & 1 )
alexwhittemore 0:7fd45d2b5926 87 {
alexwhittemore 0:7fd45d2b5926 88 // set PINSEL bits to 0b00 (GPIO)
alexwhittemore 0:7fd45d2b5926 89 PINSELREG(pin) &= ~PINSELMASK(pin, 3);
alexwhittemore 0:7fd45d2b5926 90 // set FIODIR bit to 1 (output)
alexwhittemore 0:7fd45d2b5926 91 PORTDEF(pin)->FIODIR |= PINMASK(pin);
alexwhittemore 0:7fd45d2b5926 92 }
alexwhittemore 0:7fd45d2b5926 93 pin++;
alexwhittemore 0:7fd45d2b5926 94 }
alexwhittemore 0:7fd45d2b5926 95 }
alexwhittemore 0:7fd45d2b5926 96 void write(int value)
alexwhittemore 0:7fd45d2b5926 97 {
alexwhittemore 0:7fd45d2b5926 98 PORTDEFPORT(port)->FIOSET = value & mask;
alexwhittemore 0:7fd45d2b5926 99 PORTDEFPORT(port)->FIOCLR = ~value & mask;
alexwhittemore 0:7fd45d2b5926 100 }
alexwhittemore 0:7fd45d2b5926 101 int read()
alexwhittemore 0:7fd45d2b5926 102 {
alexwhittemore 0:7fd45d2b5926 103 return PORTDEFPORT(port)->FIOPIN & mask;
alexwhittemore 0:7fd45d2b5926 104 }
alexwhittemore 0:7fd45d2b5926 105 FastPortOut& operator= (int value) { write(value); return *this; };
alexwhittemore 0:7fd45d2b5926 106 FastPortOut& operator= (FastPortOut& rhs) { return write(rhs.read()); };
alexwhittemore 0:7fd45d2b5926 107 operator int() { return read(); };
alexwhittemore 0:7fd45d2b5926 108 };
alexwhittemore 0:7fd45d2b5926 109
alexwhittemore 0:7fd45d2b5926 110 // usage: MaskedPortOut<Port0, mask> led2;
alexwhittemore 0:7fd45d2b5926 111 // then use the same assignment operators as with DigitalOut
alexwhittemore 0:7fd45d2b5926 112 template <enum PortName port, uint32_t mask = 0xFFFFFFFF> class MaskedPortOut
alexwhittemore 0:7fd45d2b5926 113 {
alexwhittemore 0:7fd45d2b5926 114 public:
alexwhittemore 0:7fd45d2b5926 115 MaskedPortOut()
alexwhittemore 0:7fd45d2b5926 116 {
alexwhittemore 0:7fd45d2b5926 117 // init pins selected by the mask
alexwhittemore 0:7fd45d2b5926 118 uint32_t pin = LPC_GPIO0_BASE + port * 32;
alexwhittemore 0:7fd45d2b5926 119 for ( uint32_t pinmask = mask; pinmask !=0; pinmask >>= 1 )
alexwhittemore 0:7fd45d2b5926 120 {
alexwhittemore 0:7fd45d2b5926 121 if ( pinmask & 1 )
alexwhittemore 0:7fd45d2b5926 122 {
alexwhittemore 0:7fd45d2b5926 123 // set PINSEL bits to 0b00 (GPIO)
alexwhittemore 0:7fd45d2b5926 124 PINSELREG(pin) &= ~PINSELMASK(pin, 3);
alexwhittemore 0:7fd45d2b5926 125 // set FIODIR bit to 1 (output)
alexwhittemore 0:7fd45d2b5926 126 PORTDEF(pin)->FIODIR |= PINMASK(pin);
alexwhittemore 0:7fd45d2b5926 127 }
alexwhittemore 0:7fd45d2b5926 128 pin++;
alexwhittemore 0:7fd45d2b5926 129 }
alexwhittemore 0:7fd45d2b5926 130 // set mask
alexwhittemore 0:7fd45d2b5926 131 PORTDEFPORT(port)->FIOMASK = mask;
alexwhittemore 0:7fd45d2b5926 132 }
alexwhittemore 0:7fd45d2b5926 133 void write(int value)
alexwhittemore 0:7fd45d2b5926 134 {
alexwhittemore 0:7fd45d2b5926 135 PORTDEFPORT(port)->FIOPIN = value;
alexwhittemore 0:7fd45d2b5926 136 }
alexwhittemore 0:7fd45d2b5926 137 int read()
alexwhittemore 0:7fd45d2b5926 138 {
alexwhittemore 0:7fd45d2b5926 139 return PORTDEFPORT(port)->FIOPIN;
alexwhittemore 0:7fd45d2b5926 140 }
alexwhittemore 0:7fd45d2b5926 141 MaskedPortOut& operator= (int value) { write(value); return *this; };
alexwhittemore 0:7fd45d2b5926 142 MaskedPortOut& operator= (MaskedPortOut& rhs) { return write(rhs.read()); };
alexwhittemore 0:7fd45d2b5926 143 operator int() { return read(); };
alexwhittemore 0:7fd45d2b5926 144 };
alexwhittemore 0:7fd45d2b5926 145
alexwhittemore 0:7fd45d2b5926 146 #endif