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241 lines
8.6 KiB
241 lines
8.6 KiB
5 years ago
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/* IRLibSAMD21.h
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* Part of IRLib Library for Arduino receiving, decoding, and sending
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* infrared signals. See COPYRIGHT.txt and LICENSE.txt for more information.
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*
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* This type of content is normally stored in IRLibHardware.h but we have
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* moved at her because the SAMD21 support is significantly different than the
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* AVR 8-bit hardware support. Separating it out into a separate file
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* will make it easier to include comments and to maintain the code.
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*/
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/* This file provides hardware support for the SAMD21G18A processor or as we
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* will refer to it simply as SAMD 21. This processor is used in the Arduino Zero,
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* Arduino M0, Arduino M0 Pro, and the Adafruit Feather M0 series boards as well as
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* the upcoming Adafruit Circuit Playground Express.
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* Most of the code has been adapted from messages on the Arduino.cc support forum
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* and from the code at:
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* https://github.com/manitou48/ZERO/tree/master/IRtest
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* Receiving is supported through all three receiver classes. As you would expect
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* the IRrecvLoop class can be used with any available input pin. The IRrecvPCI and
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* IRfrequency classes can be used on any pin that supports "attachInterrupt()".
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* Specifically that means everything except pin 4 on the Arduino Zero. And everything
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* except pin 2 on the boards from Arduino.org such as the Arduino M0, M0 Pro, and
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* Zero Pro. For details on supported pins see these links:
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* https://www.arduino.cc/en/Reference/AttachInterrupt
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* http://www.arduino.org/learning/reference/AttachInterrupt
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* Note that although we support Arduino.org hardware, you should only use the
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* Arduino.cc IDE for compiling your sketches.
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* Both sending and receiving use GCLK0 even though GCLK0-GCLK3 are generally reserved
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* the Arduino infrastructure. However we are using the default 48 MHz clock source
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* and a divisor of "1" so we aren't changing any of the GCLK0 set up. It's therefore
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* safe to use.
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* The IRrecv receiver class using a 50 microsecond timer interrupt is also supported.
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* It defaults to using hardware timer TC3 however TC4 and TC5 can also be used in case
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* of conflicts with other libraries. The IRrecv and IRrecvLoop classes should be able to use
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* any available input pin. Note that all of our example sketches used pin 2 for
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* receiver and pin 3 for frequency measurement. However pin 2 is not available for PCI
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* interrupts on the Arduino.org platforms and neither 2 nor 3 are available on the
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* Adafruit Feather M0 platforms. We are recommending using 5 and 6 for receiving and
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* frequency measurement respectively.
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* For sending, you can use any pin that supports PWM on your particular
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* platform. On Arduino Zero that means pins 3, 4, 5, 6, 8, 9, 10, 11, 12, or 13.
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* Additionally Arduino M0 Pro adds pins 2 and 7 to that list. In all cases the default
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* output pin is 9. The code automatically selects TCC0 or TCC1 based on pin number
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* as needed. It has been tested at frequencies of 36, 38, 39, 40 and 57 which
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* are the frequencies of our supported protocols.
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* As of this release the code has been tested on Arduino Zero, Arduino M0 Pro, and
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* Adafruit Feather M0 BLE version.
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*/
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#ifndef IRLibSAMD21_h
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#define IRLibSAMD21_h
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/*
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* This section contains user changeable values. You can probably stick with the defaults
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* but if there are hardware conflicts with other libraries, you can change these values.
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*/
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//Choose PWM output pin number from among the following
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//Un-comment only one of these.
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//#define IR_SEND_PWM_PIN 2
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//#define IR_SEND_PWM_PIN 3
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//#define IR_SEND_PWM_PIN 4
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//#define IR_SEND_PWM_PIN 5
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//#define IR_SEND_PWM_PIN 6
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//#define IR_SEND_PWM_PIN 7
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//#define IR_SEND_PWM_PIN 8
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//#define IR_SEND_PWM_PIN 9
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//#define IR_SEND_PWM_PIN 10
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//#define IR_SEND_PWM_PIN 11
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#define IR_SEND_PWM_PIN 12
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//#define IR_SEND_PWM_PIN 13
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//Override default for Adafruit Circuit Playground Express
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#ifdef ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS
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#define IR_SEND_PWM_PIN 25
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#endif
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//Choose which timer counter to use for the 50 microsecond interrupt
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//Un-comment only one of these.
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#define IR_TCn 3
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//#define IR_TCn 4
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//#define IR_TCn 5
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/*
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* Everything below this point should not be changed. It computes needed defines
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* based on the user set values above.
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*/
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// Saves us a lot of typing when synchronizing
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#define syncTC while (IR_TCx->COUNT16.STATUS.bit.SYNCBUSY)
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#define syncGCLK while (GCLK->STATUS.bit.SYNCBUSY)
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#if defined(ARDUINO_SAMD_FEATHER_M0)
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#if ( (IR_SEND_PWM_PIN<5) || (IR_SEND_PWM_PIN==7) || (IR_SEND_PWM_PIN==8) )
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#error "Pin unsupported on Adafruit Feather M0"
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#endif
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#endif
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//Pins 8 and 9 use TCC1 and all others use TCC0
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#if ( (IR_SEND_PWM_PIN==8) || (IR_SEND_PWM_PIN==9) )
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#define IR_TCCx TCC1
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#else
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#define IR_TCCx TCC0
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#endif
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//Although there are 8 WO there are only 4 CC
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#define CC4 CC0
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#define CC5 CC1
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#define CC6 CC2
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#define CC7 CC3
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//Set other values based on pin number
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#if (IR_SEND_PWM_PIN==2)
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//NOTE: Arduino M0 Pro only
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#if defined(ARDUINO_SAM_ZERO)
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//PA08 E:TCC0-WO[0] F:TCC1-WO[2]
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#define IR_MUX_EF PORT_PMUX_PMUXE_E
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#define IR_CCx CC0
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#define IR_CCn 0
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#else
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#error "Pin 2 only available on Arduino M0 Pro"
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#endif
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#elif (IR_SEND_PWM_PIN==3)
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//PA09 E:TCC0-WO[1] F:TCC1-WO[3]
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#define IR_MUX_EF PORT_PMUX_PMUXO_E
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#define IR_CCx CC1
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#define IR_CCn 1
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#elif (IR_SEND_PWM_PIN==4)
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//Arduino M0 Pro swaps pins 2 and 4
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#if(ARDUINO_SAM_ZERO)
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//Arduino M0 Pro
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//PA09 E:TC3-WO[0] F:TCC0-WO[4]
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#define IR_MUX_EF PORT_PMUX_PMUXE_F
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#define IR_CCx CC4
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#define IR_CCn 4
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#else
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//Arduino Zero
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//PA08 E:TCC0-WO[0] F:TCC1-WO[2]
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#define IR_MUX_EF PORT_PMUX_PMUXE_E
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#define IR_CCx CC0
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#define IR_CCn 0
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#endif
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#elif (IR_SEND_PWM_PIN==5)
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//PA15 E:TC3-WO[1] F:TCC0-WO[5]
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#define IR_MUX_EF PORT_PMUX_PMUXO_F
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#define IR_CCx CC5
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#define IR_CCn 5
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#elif (IR_SEND_PWM_PIN==6)
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//PA20 E:TC7-WO[0] F:TCC0-WO[6]
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#define IR_MUX_EF PORT_PMUX_PMUXE_F
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#define IR_CCx CC6
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#define IR_CCn 6
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#elif (IR_SEND_PWM_PIN==7)
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//NOTE: Arduino M0 Pro only
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#if defined(ARDUINO_SAM_ZERO)
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//PA08 E:TC7-WO[1] F:TCC0-WO[7]
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#define IR_MUX_EF PORT_PMUX_PMUXO_F
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#define IR_CCx CC7
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#define IR_CCn 7
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#else
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#error "Pin 7 only available on Arduino M0 Pro"
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#endif
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#elif (IR_SEND_PWM_PIN==8)
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//PA06 E:TCC1-WO[0] F:--
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#define IR_MUX_EF PORT_PMUX_PMUXE_E
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#define IR_CCx CC0
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#define IR_CCn 0
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#elif (IR_SEND_PWM_PIN==9)
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//PA07 E:TCC1-WO[1] F:--
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#define IR_MUX_EF PORT_PMUX_PMUXO_E
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#define IR_CCx CC1
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#define IR_CCn 1
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#elif (IR_SEND_PWM_PIN==10)
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//PA18 E:TC3-WO[0] F:TCC0-WO[2]
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#define IR_MUX_EF PORT_PMUX_PMUXE_F
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#define IR_CCx CC2
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#define IR_CCn 2
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#elif (IR_SEND_PWM_PIN==11)
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//PA16 E:TCC2-WO[0] F:TCC0-WO[6]
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#define IR_MUX_EF PORT_PMUX_PMUXE_F
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#define IR_CCx CC6
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#define IR_CCn 6
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#elif (IR_SEND_PWM_PIN==12)
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//PA19 E:TC3-WO[1] F:TCC0-WO[3]
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#define IR_MUX_EF PORT_PMUX_PMUXO_F
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#define IR_CCx CC3
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#define IR_CCn 3
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#elif (IR_SEND_PWM_PIN==13)
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//PA17 E:TCC2-WO[1] F:TCC0-WO[7]
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#define IR_MUX_EF PORT_PMUX_PMUXO_F
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#define IR_CCx CC7
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#define IR_CCn 7
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#elif (IR_SEND_PWM_PIN==25)//Adafruit Circuit Playground Express only
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//PA23 E:TC4-WO[1] F:TCC0-WO[5]
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#define IR_MUX_EF PORT_PMUX_PMUXO_F
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#define IR_CCx CC5
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#define IR_CCn 5
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#else
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#error "Invalid SAMD21 PWM pin"
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#endif
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// Turns PWM on and off after already set up
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#define IR_SEND_PWM_START {IR_TCCx->CTRLA.reg |= TCC_CTRLA_ENABLE;\
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while (IR_TCCx->SYNCBUSY.bit.ENABLE);}
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#define IR_SEND_MARK_TIME(time) IRLibDelayUSecs(time)
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#define IR_SEND_PWM_STOP {IR_TCCx->CTRLA.reg &= ~TCC_CTRLA_ENABLE;\
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while (IR_TCCx->SYNCBUSY.bit.ENABLE);}
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#define IR_SEND_CONFIG_KHZ(val) initializeSAMD21PWM(val);
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/* These are the definitions for setting up the 50 microsecond
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* timer interrupt for the IRrecv class.
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*/
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#if (IR_TCn==3)
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#define IR_TCx TC3
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#define IR_GCM GCM_TCC2_TC3
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#define IR_RECV_INTR_NAME void TC3_Handler()
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#define IR_IRQ TC3_IRQn
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#elif (IR_TCn==4)
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#define IR_TCx TC4
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#define IR_GCM GCM_TC4_TC5
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#define IR_RECV_INTR_NAME void TC4_Handler()
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#define IR_IRQ TC4_IRQn
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#elif (IR_TCn==5)
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#define IR_TCx TC5
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#define IR_GCM GCM_TC4_TC5
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#define IR_RECV_INTR_NAME void TC5_Handler()
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#define IR_IRQ TC5_IRQn
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#else
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#error "Invalid IR_TCn value"
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#endif
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#define IR_RECV_ENABLE_INTR ({NVIC_EnableIRQ(IR_IRQ);\
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IR_TCx->COUNT16.INTENSET.reg = TC_INTENSET_OVF;\
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IR_TCx->COUNT16.CTRLA.reg |= TC_CTRLA_ENABLE; syncTC;})
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#define IR_RECV_DISABLE_INTR IR_TCx->COUNT16.INTENCLR.reg = TC_INTENCLR_OVF;
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#define IR_RECV_CONFIG_TICKS() initializeSAMD21timerInterrupt()
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//Clear interrupt
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#define IR_CLEAR_INTERRUPT IR_TCx->COUNT16.INTFLAG.bit.MC0 = 1;
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//prototypes
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void initializeSAMD21PWM(uint16_t khz);
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void initializeSAMD21timerInterrupt(void);
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#endif //IRLibSAMD21_h
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