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235 lines
9.3 KiB
235 lines
9.3 KiB
5 years ago
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/*
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CapacitiveSense.h v.04 - Capacitive Sensing Library for 'duino / Wiring
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https://github.com/PaulStoffregen/CapacitiveSensor
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http://www.pjrc.com/teensy/td_libs_CapacitiveSensor.html
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http://playground.arduino.cc/Main/CapacitiveSensor
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Copyright (c) 2008 Paul Bagder All rights reserved.
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Version 05 by Paul Stoffregen - Support non-AVR board: Teensy 3.x, Arduino Due
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Version 04 by Paul Stoffregen - Arduino 1.0 compatibility, issue 146 fix
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vim: set ts=4:
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*/
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// ensure this library description is only included once
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#ifndef CapacitiveSensor_h
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#define CapacitiveSensor_h
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#if ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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// Direct I/O through registers and bitmask (from OneWire library)
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#if defined(__AVR__)
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#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint8_t
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#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) &= ~(mask), (*((base)+2)) &= ~(mask))
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#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+1)) |= (mask))
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#define DIRECT_WRITE_LOW(base, mask) ((*((base)+2)) &= ~(mask))
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#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+2)) |= (mask))
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#elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK66FX1M0__) || defined(__MK64FX512__)
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#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
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#define PIN_TO_BITMASK(pin) (1)
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#define IO_REG_TYPE uint8_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (*((base)+512))
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#define DIRECT_MODE_INPUT(base, mask) (*((base)+640) = 0)
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#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+640) = 1)
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#define DIRECT_WRITE_LOW(base, mask) (*((base)+256) = 1)
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#define DIRECT_WRITE_HIGH(base, mask) (*((base)+128) = 1)
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#elif defined(__MKL26Z64__)
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#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint8_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) ((*((base)+16) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) (*((base)+20) &= ~(mask))
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#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+20) |= (mask))
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#define DIRECT_WRITE_LOW(base, mask) (*((base)+8) = (mask))
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#define DIRECT_WRITE_HIGH(base, mask) (*((base)+4) = (mask))
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#elif defined(__SAM3X8E__)
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#define PIN_TO_BASEREG(pin) (&(digitalPinToPort(pin)->PIO_PER))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*((base)+15)) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) ((*((base)+5)) = (mask))
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#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+4)) = (mask))
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#define DIRECT_WRITE_LOW(base, mask) ((*((base)+13)) = (mask))
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#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+12)) = (mask))
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#elif defined(__PIC32MX__)
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#define PIN_TO_BASEREG(pin) (portModeRegister(digitalPinToPort(pin)))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*(base+4)) & (mask)) ? 1 : 0) //PORTX + 0x10
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#define DIRECT_MODE_INPUT(base, mask) ((*(base+2)) = (mask)) //TRISXSET + 0x08
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#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+1)) = (mask)) //TRISXCLR + 0x04
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#define DIRECT_WRITE_LOW(base, mask) ((*(base+8+1)) = (mask)) //LATXCLR + 0x24
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#define DIRECT_WRITE_HIGH(base, mask) ((*(base+8+2)) = (mask)) //LATXSET + 0x28
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#elif defined(ARDUINO_ARCH_ESP8266)
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#define PIN_TO_BASEREG(pin) (portOutputRegister(digitalPinToPort(pin)))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*(base+6)) & (mask)) ? 1 : 0) //GPIO_IN_ADDRESS
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#define DIRECT_MODE_INPUT(base, mask) ((*(base+5)) = (mask)) //GPIO_ENABLE_W1TC_ADDRESS
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#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+4)) = (mask)) //GPIO_ENABLE_W1TS_ADDRESS
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#define DIRECT_WRITE_LOW(base, mask) ((*(base+2)) = (mask)) //GPIO_OUT_W1TC_ADDRESS
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#define DIRECT_WRITE_HIGH(base, mask) ((*(base+1)) = (mask)) //GPIO_OUT_W1TS_ADDRESS
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#elif defined(__SAMD21G18A__)
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// runs extremely slow/unreliable on Arduino Zero - help wanted....
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#define PIN_TO_BASEREG(pin) portModeRegister(digitalPinToPort(pin))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*((base)+8)) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) = (mask))
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#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+2)) = (mask))
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#define DIRECT_WRITE_LOW(base, mask) ((*((base)+5)) = (mask))
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#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+6)) = (mask))
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#elif defined(RBL_NRF51822)
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#define PIN_TO_BASEREG(pin) (0)
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#define PIN_TO_BITMASK(pin) (pin)
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, pin) nrf_gpio_pin_read(pin)
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#define DIRECT_WRITE_LOW(base, pin) nrf_gpio_pin_clear(pin)
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#define DIRECT_WRITE_HIGH(base, pin) nrf_gpio_pin_set(pin)
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#define DIRECT_MODE_INPUT(base, pin) nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL)
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#define DIRECT_MODE_OUTPUT(base, pin) nrf_gpio_cfg_output(pin)
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#elif defined(__arc__)
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#include "scss_registers.h"
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#include "portable.h"
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#include "avr/pgmspace.h"
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#define GPIO_ID(pin) (g_APinDescription[pin].ulGPIOId)
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#define GPIO_TYPE(pin) (g_APinDescription[pin].ulGPIOType)
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#define GPIO_BASE(pin) (g_APinDescription[pin].ulGPIOBase)
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#define DIR_OFFSET_SS 0x01
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#define DIR_OFFSET_SOC 0x04
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#define EXT_PORT_OFFSET_SS 0x0A
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#define EXT_PORT_OFFSET_SOC 0x50
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/* GPIO registers base address */
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#define PIN_TO_BASEREG(pin) ((volatile uint32_t *)g_APinDescription[pin].ulGPIOBase)
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#define PIN_TO_BITMASK(pin) pin
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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static inline __attribute__((always_inline))
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IO_REG_TYPE directRead(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
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{
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IO_REG_TYPE ret;
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if (SS_GPIO == GPIO_TYPE(pin)) {
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ret = READ_ARC_REG(((IO_REG_TYPE)base + EXT_PORT_OFFSET_SS));
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} else {
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ret = MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, EXT_PORT_OFFSET_SOC);
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}
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return ((ret >> GPIO_ID(pin)) & 0x01);
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}
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static inline __attribute__((always_inline))
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void directModeInput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
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{
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if (SS_GPIO == GPIO_TYPE(pin)) {
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WRITE_ARC_REG(READ_ARC_REG((((IO_REG_TYPE)base) + DIR_OFFSET_SS)) & ~(0x01 << GPIO_ID(pin)),
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((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
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} else {
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MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) &= ~(0x01 << GPIO_ID(pin));
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}
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}
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static inline __attribute__((always_inline))
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void directModeOutput(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
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{
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if (SS_GPIO == GPIO_TYPE(pin)) {
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WRITE_ARC_REG(READ_ARC_REG(((IO_REG_TYPE)(base) + DIR_OFFSET_SS)) | (0x01 << GPIO_ID(pin)),
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((IO_REG_TYPE)(base) + DIR_OFFSET_SS));
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} else {
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MMIO_REG_VAL_FROM_BASE((IO_REG_TYPE)base, DIR_OFFSET_SOC) |= (0x01 << GPIO_ID(pin));
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}
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}
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static inline __attribute__((always_inline))
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void directWriteLow(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
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{
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if (SS_GPIO == GPIO_TYPE(pin)) {
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WRITE_ARC_REG(READ_ARC_REG(base) & ~(0x01 << GPIO_ID(pin)), base);
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} else {
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MMIO_REG_VAL(base) &= ~(0x01 << GPIO_ID(pin));
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}
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}
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static inline __attribute__((always_inline))
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void directWriteHigh(volatile IO_REG_TYPE *base, IO_REG_TYPE pin)
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{
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if (SS_GPIO == GPIO_TYPE(pin)) {
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WRITE_ARC_REG(READ_ARC_REG(base) | (0x01 << GPIO_ID(pin)), base);
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} else {
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MMIO_REG_VAL(base) |= (0x01 << GPIO_ID(pin));
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}
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}
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#define DIRECT_READ(base, pin) directRead(base, pin)
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#define DIRECT_MODE_INPUT(base, pin) directModeInput(base, pin)
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#define DIRECT_MODE_OUTPUT(base, pin) directModeOutput(base, pin)
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#define DIRECT_WRITE_LOW(base, pin) directWriteLow(base, pin)
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#define DIRECT_WRITE_HIGH(base, pin) directWriteHigh(base, pin)
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#endif
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// some 3.3V chips with 5V tolerant pins need this workaround
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//
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#if defined(__MK20DX256__)
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#define FIVE_VOLT_TOLERANCE_WORKAROUND
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#endif
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/**************************************************************************/
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/*!
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@brief Class that stores state and functions for the capacitive sensor on CircuitPlayground boards
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*/
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/**************************************************************************/
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class CPlay_CapacitiveSensor
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{
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// user-accessible "public" interface
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public:
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// methods
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CPlay_CapacitiveSensor(uint8_t sendPin = 0, uint8_t receivePin = 0);
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long capacitiveSensorRaw(uint8_t samples);
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long capacitiveSensor(uint8_t samples);
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void set_CS_Timeout_Millis(unsigned long timeout_millis);
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void reset_CS_AutoCal();
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void set_CS_AutocaL_Millis(unsigned long autoCal_millis);
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// library-accessible "private" interface
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private:
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// variables
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int error;
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unsigned long leastTotal;
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unsigned int loopTimingFactor;
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unsigned long CS_Timeout_Millis;
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unsigned long CS_AutocaL_Millis;
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unsigned long lastCal;
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unsigned long total;
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IO_REG_TYPE sBit; // send pin's ports and bitmask
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volatile IO_REG_TYPE *sReg;
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IO_REG_TYPE rBit; // receive pin's ports and bitmask
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volatile IO_REG_TYPE *rReg;
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// methods
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int SenseOneCycle(void);
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};
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#endif
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