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mbed/AnalogOut.h@15:c2fc239e85df, 2017-05-11 (annotated)
- Committer:
- ClementBreteau
- Date:
- Thu May 11 12:55:52 2017 +0000
- Revision:
- 15:c2fc239e85df
- Parent:
- 0:ad97421fb1fb
crac strat le 11/05/17
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
antbig | 0:ad97421fb1fb | 1 | /* mbed Microcontroller Library - AnalogOut |
antbig | 0:ad97421fb1fb | 2 | * Copyright (c) 2006-2011 ARM Limited. All rights reserved. |
antbig | 0:ad97421fb1fb | 3 | */ |
antbig | 0:ad97421fb1fb | 4 | |
antbig | 0:ad97421fb1fb | 5 | #ifndef MBED_ANALOGOUT_H |
antbig | 0:ad97421fb1fb | 6 | #define MBED_ANALOGOUT_H |
antbig | 0:ad97421fb1fb | 7 | |
antbig | 0:ad97421fb1fb | 8 | #include "device.h" |
antbig | 0:ad97421fb1fb | 9 | |
antbig | 0:ad97421fb1fb | 10 | #if DEVICE_ANALOGOUT |
antbig | 0:ad97421fb1fb | 11 | |
antbig | 0:ad97421fb1fb | 12 | #include "platform.h" |
antbig | 0:ad97421fb1fb | 13 | #include "PinNames.h" |
antbig | 0:ad97421fb1fb | 14 | #include "PeripheralNames.h" |
antbig | 0:ad97421fb1fb | 15 | #include "Base.h" |
antbig | 0:ad97421fb1fb | 16 | |
antbig | 0:ad97421fb1fb | 17 | namespace mbed { |
antbig | 0:ad97421fb1fb | 18 | |
antbig | 0:ad97421fb1fb | 19 | /* Class: AnalogOut |
antbig | 0:ad97421fb1fb | 20 | * An analog output, used for setting the voltage on a pin |
antbig | 0:ad97421fb1fb | 21 | * |
antbig | 0:ad97421fb1fb | 22 | * Example: |
antbig | 0:ad97421fb1fb | 23 | * > // Make a sawtooth output |
antbig | 0:ad97421fb1fb | 24 | * > |
antbig | 0:ad97421fb1fb | 25 | * > #include "mbed.h" |
antbig | 0:ad97421fb1fb | 26 | * > |
antbig | 0:ad97421fb1fb | 27 | * > AnalogOut tri(p18); |
antbig | 0:ad97421fb1fb | 28 | * > int main() { |
antbig | 0:ad97421fb1fb | 29 | * > while(1) { |
antbig | 0:ad97421fb1fb | 30 | * > tri = tri + 0.01; |
antbig | 0:ad97421fb1fb | 31 | * > wait_us(1); |
antbig | 0:ad97421fb1fb | 32 | * > if(tri == 1) { |
antbig | 0:ad97421fb1fb | 33 | * > tri = 0; |
antbig | 0:ad97421fb1fb | 34 | * > } |
antbig | 0:ad97421fb1fb | 35 | * > } |
antbig | 0:ad97421fb1fb | 36 | * > } |
antbig | 0:ad97421fb1fb | 37 | */ |
antbig | 0:ad97421fb1fb | 38 | class AnalogOut : public Base { |
antbig | 0:ad97421fb1fb | 39 | |
antbig | 0:ad97421fb1fb | 40 | public: |
antbig | 0:ad97421fb1fb | 41 | |
antbig | 0:ad97421fb1fb | 42 | /* Constructor: AnalogOut |
antbig | 0:ad97421fb1fb | 43 | * Create an AnalogOut connected to the specified pin |
antbig | 0:ad97421fb1fb | 44 | * |
antbig | 0:ad97421fb1fb | 45 | * Variables: |
antbig | 0:ad97421fb1fb | 46 | * pin - AnalogOut pin to connect to (18) |
antbig | 0:ad97421fb1fb | 47 | */ |
antbig | 0:ad97421fb1fb | 48 | AnalogOut(PinName pin, const char *name = NULL); |
antbig | 0:ad97421fb1fb | 49 | |
antbig | 0:ad97421fb1fb | 50 | /* Function: write |
antbig | 0:ad97421fb1fb | 51 | * Set the output voltage, specified as a percentage (float) |
antbig | 0:ad97421fb1fb | 52 | * |
antbig | 0:ad97421fb1fb | 53 | * Variables: |
antbig | 0:ad97421fb1fb | 54 | * percent - A floating-point value representing the output voltage, |
antbig | 0:ad97421fb1fb | 55 | * specified as a percentage. The value should lie between |
antbig | 0:ad97421fb1fb | 56 | * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%). |
antbig | 0:ad97421fb1fb | 57 | * Values outside this range will be saturated to 0.0f or 1.0f. |
antbig | 0:ad97421fb1fb | 58 | */ |
antbig | 0:ad97421fb1fb | 59 | void write(float value); |
antbig | 0:ad97421fb1fb | 60 | |
antbig | 0:ad97421fb1fb | 61 | /* Function: write_u16 |
antbig | 0:ad97421fb1fb | 62 | * Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF] |
antbig | 0:ad97421fb1fb | 63 | * |
antbig | 0:ad97421fb1fb | 64 | * Variables: |
antbig | 0:ad97421fb1fb | 65 | * value - 16-bit unsigned short representing the output voltage, |
antbig | 0:ad97421fb1fb | 66 | * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v) |
antbig | 0:ad97421fb1fb | 67 | */ |
antbig | 0:ad97421fb1fb | 68 | void write_u16(unsigned short value); |
antbig | 0:ad97421fb1fb | 69 | |
antbig | 0:ad97421fb1fb | 70 | /* Function: read |
antbig | 0:ad97421fb1fb | 71 | * Return the current output voltage setting, measured as a percentage (float) |
antbig | 0:ad97421fb1fb | 72 | * |
antbig | 0:ad97421fb1fb | 73 | * Variables: |
antbig | 0:ad97421fb1fb | 74 | * returns - A floating-point value representing the current voltage being output on the pin, |
antbig | 0:ad97421fb1fb | 75 | * measured as a percentage. The returned value will lie between |
antbig | 0:ad97421fb1fb | 76 | * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%). |
antbig | 0:ad97421fb1fb | 77 | * |
antbig | 0:ad97421fb1fb | 78 | * Note: |
antbig | 0:ad97421fb1fb | 79 | * This value may not match exactly the value set by a previous <write>. |
antbig | 0:ad97421fb1fb | 80 | */ |
antbig | 0:ad97421fb1fb | 81 | float read(); |
antbig | 0:ad97421fb1fb | 82 | |
antbig | 0:ad97421fb1fb | 83 | |
antbig | 0:ad97421fb1fb | 84 | #ifdef MBED_OPERATORS |
antbig | 0:ad97421fb1fb | 85 | /* Function: operator= |
antbig | 0:ad97421fb1fb | 86 | * An operator shorthand for <write()> |
antbig | 0:ad97421fb1fb | 87 | */ |
antbig | 0:ad97421fb1fb | 88 | AnalogOut& operator= (float percent); |
antbig | 0:ad97421fb1fb | 89 | AnalogOut& operator= (AnalogOut& rhs); |
antbig | 0:ad97421fb1fb | 90 | |
antbig | 0:ad97421fb1fb | 91 | /* Function: operator float() |
antbig | 0:ad97421fb1fb | 92 | * An operator shorthand for <read()> |
antbig | 0:ad97421fb1fb | 93 | */ |
antbig | 0:ad97421fb1fb | 94 | operator float(); |
antbig | 0:ad97421fb1fb | 95 | #endif |
antbig | 0:ad97421fb1fb | 96 | |
antbig | 0:ad97421fb1fb | 97 | #ifdef MBED_RPC |
antbig | 0:ad97421fb1fb | 98 | virtual const struct rpc_method *get_rpc_methods(); |
antbig | 0:ad97421fb1fb | 99 | static struct rpc_class *get_rpc_class(); |
antbig | 0:ad97421fb1fb | 100 | #endif |
antbig | 0:ad97421fb1fb | 101 | |
antbig | 0:ad97421fb1fb | 102 | protected: |
antbig | 0:ad97421fb1fb | 103 | |
antbig | 0:ad97421fb1fb | 104 | DACName _dac; |
antbig | 0:ad97421fb1fb | 105 | |
antbig | 0:ad97421fb1fb | 106 | }; |
antbig | 0:ad97421fb1fb | 107 | |
antbig | 0:ad97421fb1fb | 108 | } // namespace mbed |
antbig | 0:ad97421fb1fb | 109 | |
antbig | 0:ad97421fb1fb | 110 | #endif |
antbig | 0:ad97421fb1fb | 111 | |
antbig | 0:ad97421fb1fb | 112 | #endif |