Naze32 clone with Frysky receiver
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  1. /* mbed Microcontroller Library
  2. * Copyright (c) 2006-2013 ARM Limited
  3. *
  4. * Licensed under the Apache License, Version 2.0 (the "License");
  5. * you may not use this file except in compliance with the License.
  6. * You may obtain a copy of the License at
  7. *
  8. * http://www.apache.org/licenses/LICENSE-2.0
  9. *
  10. * Unless required by applicable law or agreed to in writing, software
  11. * distributed under the License is distributed on an "AS IS" BASIS,
  12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. * See the License for the specific language governing permissions and
  14. * limitations under the License.
  15. */
  16. #ifndef MBED_BUSOUT_H
  17. #define MBED_BUSOUT_H
  18. #include "DigitalOut.h"
  19. namespace mbed {
  20. /** A digital output bus, used for setting the state of a collection of pins
  21. */
  22. class BusOut {
  23. public:
  24. /** Create an BusOut, connected to the specified pins
  25. *
  26. * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC)
  27. *
  28. * @note
  29. * It is only required to specify as many pin variables as is required
  30. * for the bus; the rest will default to NC (not connected)
  31. */
  32. BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
  33. PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
  34. PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
  35. PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
  36. BusOut(PinName pins[16]);
  37. virtual ~BusOut();
  38. /** Write the value to the output bus
  39. *
  40. * @param value An integer specifying a bit to write for every corresponding DigitalOut pin
  41. */
  42. void write(int value);
  43. /** Read the value currently output on the bus
  44. *
  45. * @returns
  46. * An integer with each bit corresponding to associated DigitalOut pin setting
  47. */
  48. int read();
  49. /** Binary mask of bus pins connected to actual pins (not NC pins)
  50. * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
  51. *
  52. * @returns
  53. * Binary mask of connected pins
  54. */
  55. int mask() {
  56. return _nc_mask;
  57. }
  58. #ifdef MBED_OPERATORS
  59. /** A shorthand for write()
  60. */
  61. BusOut& operator= (int v);
  62. BusOut& operator= (BusOut& rhs);
  63. /** Access to particular bit in random-iterator fashion
  64. */
  65. DigitalOut& operator[] (int index);
  66. /** A shorthand for read()
  67. */
  68. operator int();
  69. #endif
  70. protected:
  71. DigitalOut* _pin[16];
  72. /** Mask of bus's NC pins
  73. * If bit[n] is set to 1 - pin is connected
  74. * if bit[n] is cleared - pin is not connected (NC)
  75. */
  76. int _nc_mask;
  77. /* disallow copy constructor and assignment operators */
  78. private:
  79. BusOut(const BusOut&);
  80. BusOut & operator = (const BusOut&);
  81. };
  82. } // namespace mbed
  83. #endif