Manas Savkoor / Mbed 2 deprecated adc_timer_try10

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Dependencies:   mbed

Fork of adc_timer_try7 by Manas Savkoor

adc.h@0:bf25fa7f7ff8, 2013-01-15 (annotated)

Committer:
manants
Date:
Tue Jan 15 08:31:02 2013 +0000
Revision:
0:bf25fa7f7ff8
first trial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
manants 0:bf25fa7f7ff8 1 /* mbed Library - ADC
manants 0:bf25fa7f7ff8 2 * Copyright (c) 2010, sblandford
manants 0:bf25fa7f7ff8 3 * released under MIT license http://mbed.org/licence/mit
manants 0:bf25fa7f7ff8 4 */
manants 0:bf25fa7f7ff8 5
manants 0:bf25fa7f7ff8 6 #ifndef MBED_ADC_H
manants 0:bf25fa7f7ff8 7 #define MBED_ADC_H
manants 0:bf25fa7f7ff8 8
manants 0:bf25fa7f7ff8 9 #include "mbed.h"
manants 0:bf25fa7f7ff8 10 #define XTAL_FREQ 12000000
manants 0:bf25fa7f7ff8 11 #define MAX_ADC_CLOCK 13000000
manants 0:bf25fa7f7ff8 12 #define CLKS_PER_SAMPLE 64
manants 0:bf25fa7f7ff8 13
manants 0:bf25fa7f7ff8 14 class ADC {
manants 0:bf25fa7f7ff8 15 public:
manants 0:bf25fa7f7ff8 16
manants 0:bf25fa7f7ff8 17 //Initialize ADC with ADC maximum sample rate of
manants 0:bf25fa7f7ff8 18 //sample_rate and system clock divider of cclk_div
manants 0:bf25fa7f7ff8 19 //Maximum recommened sample rate is 184000
manants 0:bf25fa7f7ff8 20 ADC(int sample_rate, int cclk_div);
manants 0:bf25fa7f7ff8 21
manants 0:bf25fa7f7ff8 22 //Enable/disable ADC on pin according to state
manants 0:bf25fa7f7ff8 23 //and also select/de-select for next conversion
manants 0:bf25fa7f7ff8 24 void setup(PinName pin, int state);
manants 0:bf25fa7f7ff8 25
manants 0:bf25fa7f7ff8 26 //Return enabled/disabled state of ADC on pin
manants 0:bf25fa7f7ff8 27 int setup(PinName pin);
manants 0:bf25fa7f7ff8 28
manants 0:bf25fa7f7ff8 29 //Enable/disable burst mode according to state
manants 0:bf25fa7f7ff8 30 void burst(int state);
manants 0:bf25fa7f7ff8 31
manants 0:bf25fa7f7ff8 32 //Select channel already setup
manants 0:bf25fa7f7ff8 33 void select(PinName pin);
manants 0:bf25fa7f7ff8 34
manants 0:bf25fa7f7ff8 35 //Return burst mode enabled/disabled
manants 0:bf25fa7f7ff8 36 int burst(void);
manants 0:bf25fa7f7ff8 37
manants 0:bf25fa7f7ff8 38 /*Set start condition and edge according to mode:
manants 0:bf25fa7f7ff8 39 0 - No start (this value should be used when clearing PDN to 0).
manants 0:bf25fa7f7ff8 40 1 - Start conversion now.
manants 0:bf25fa7f7ff8 41 2 - Start conversion when the edge selected by bit 27 occurs on the P2.10 / EINT0 / NMI pin.
manants 0:bf25fa7f7ff8 42 3 - Start conversion when the edge selected by bit 27 occurs on the P1.27 / CLKOUT /
manants 0:bf25fa7f7ff8 43 USB_OVRCRn / CAP0.1 pin.
manants 0:bf25fa7f7ff8 44 4 - Start conversion when the edge selected by bit 27 occurs on MAT0.1. Note that this does
manants 0:bf25fa7f7ff8 45 not require that the MAT0.1 function appear on a device pin.
manants 0:bf25fa7f7ff8 46 5 - Start conversion when the edge selected by bit 27 occurs on MAT0.3. Note that it is not
manants 0:bf25fa7f7ff8 47 possible to cause the MAT0.3 function to appear on a device pin.
manants 0:bf25fa7f7ff8 48 6 - Start conversion when the edge selected by bit 27 occurs on MAT1.0. Note that this does
manants 0:bf25fa7f7ff8 49 not require that the MAT1.0 function appear on a device pin.
manants 0:bf25fa7f7ff8 50 7 - Start conversion when the edge selected by bit 27 occurs on MAT1.1. Note that this does
manants 0:bf25fa7f7ff8 51 not require that the MAT1.1 function appear on a device pin.
manants 0:bf25fa7f7ff8 52 When mode >= 2, conversion is triggered by edge:
manants 0:bf25fa7f7ff8 53 0 - Rising edge
manants 0:bf25fa7f7ff8 54 1 - Falling edge
manants 0:bf25fa7f7ff8 55 */
manants 0:bf25fa7f7ff8 56 void startmode(int mode, int edge);
manants 0:bf25fa7f7ff8 57
manants 0:bf25fa7f7ff8 58 //Return startmode state according to mode_edge=0: mode and mode_edge=1: edge
manants 0:bf25fa7f7ff8 59 int startmode(int mode_edge);
manants 0:bf25fa7f7ff8 60
manants 0:bf25fa7f7ff8 61 //Start ADC conversion
manants 0:bf25fa7f7ff8 62 void start(void);
manants 0:bf25fa7f7ff8 63
manants 0:bf25fa7f7ff8 64 //Set interrupt enable/disable for pin to state
manants 0:bf25fa7f7ff8 65 void interrupt_state(PinName pin, int state);
manants 0:bf25fa7f7ff8 66
manants 0:bf25fa7f7ff8 67 //Return enable/disable state of interrupt for pin
manants 0:bf25fa7f7ff8 68 int interrupt_state(PinName pin);
manants 0:bf25fa7f7ff8 69
manants 0:bf25fa7f7ff8 70 //Attach custom interrupt handler replacing default
manants 0:bf25fa7f7ff8 71 void attach(void(*fptr)(void));
manants 0:bf25fa7f7ff8 72
manants 0:bf25fa7f7ff8 73 //Restore default interrupt handler
manants 0:bf25fa7f7ff8 74 void detach(void);
manants 0:bf25fa7f7ff8 75
manants 0:bf25fa7f7ff8 76 //Append custom interrupt handler for pin
manants 0:bf25fa7f7ff8 77 void append(PinName pin, void(*fptr)(uint32_t value));
manants 0:bf25fa7f7ff8 78
manants 0:bf25fa7f7ff8 79 //Unappend custom interrupt handler for pin
manants 0:bf25fa7f7ff8 80 void unappend(PinName pin);
manants 0:bf25fa7f7ff8 81
manants 0:bf25fa7f7ff8 82 //Append custom global interrupt handler
manants 0:bf25fa7f7ff8 83 void append(void(*fptr)(int chan, uint32_t value));
manants 0:bf25fa7f7ff8 84
manants 0:bf25fa7f7ff8 85 //Unappend custom global interrupt handler
manants 0:bf25fa7f7ff8 86 void unappend(void);
manants 0:bf25fa7f7ff8 87
manants 0:bf25fa7f7ff8 88 //Set ADC offset to a value 0-7
manants 0:bf25fa7f7ff8 89 void offset(int offset);
manants 0:bf25fa7f7ff8 90
manants 0:bf25fa7f7ff8 91 //Return current ADC offset
manants 0:bf25fa7f7ff8 92 int offset(void);
manants 0:bf25fa7f7ff8 93
manants 0:bf25fa7f7ff8 94 //Return value of ADC on pin
manants 0:bf25fa7f7ff8 95 int read(PinName pin);
manants 0:bf25fa7f7ff8 96
manants 0:bf25fa7f7ff8 97 //Return DONE flag of ADC on pin
manants 0:bf25fa7f7ff8 98 int done(PinName pin);
manants 0:bf25fa7f7ff8 99
manants 0:bf25fa7f7ff8 100 //Return OVERRUN flag of ADC on pin
manants 0:bf25fa7f7ff8 101 int overrun(PinName pin);
manants 0:bf25fa7f7ff8 102
manants 0:bf25fa7f7ff8 103 //Return actual ADC clock
manants 0:bf25fa7f7ff8 104 int actual_adc_clock(void);
manants 0:bf25fa7f7ff8 105
manants 0:bf25fa7f7ff8 106 //Return actual maximum sample rate
manants 0:bf25fa7f7ff8 107 int actual_sample_rate(void);
manants 0:bf25fa7f7ff8 108
manants 0:bf25fa7f7ff8 109 //Return pin ID of ADC channel
manants 0:bf25fa7f7ff8 110 PinName channel_to_pin(int chan);
manants 0:bf25fa7f7ff8 111
manants 0:bf25fa7f7ff8 112 //Return pin number of ADC channel
manants 0:bf25fa7f7ff8 113 int channel_to_pin_number(int chan);
manants 0:bf25fa7f7ff8 114
manants 0:bf25fa7f7ff8 115
manants 0:bf25fa7f7ff8 116 private:
manants 0:bf25fa7f7ff8 117 int _pin_to_channel(PinName pin);
manants 0:bf25fa7f7ff8 118 uint32_t _data_of_pin(PinName pin);
manants 0:bf25fa7f7ff8 119
manants 0:bf25fa7f7ff8 120 int _adc_clk_freq;
manants 0:bf25fa7f7ff8 121 void adcisr(void);
manants 0:bf25fa7f7ff8 122 static void _adcisr(void);
manants 0:bf25fa7f7ff8 123 static ADC *instance;
manants 0:bf25fa7f7ff8 124
manants 0:bf25fa7f7ff8 125 uint32_t _adc_data[8];
manants 0:bf25fa7f7ff8 126 void(*_adc_isr[8])(uint32_t value);
manants 0:bf25fa7f7ff8 127 void(*_adc_g_isr)(int chan, uint32_t value);
manants 0:bf25fa7f7ff8 128 void(*_adc_m_isr)(void);
manants 0:bf25fa7f7ff8 129 };
manants 0:bf25fa7f7ff8 130
manants 0:bf25fa7f7ff8 131 #endif