Laser Sensing Display for UI interfaces in the real world
Fork of skinGames_forktest by
hardwareIO/adc.h@0:345b3bc7a0ea, 2012-03-28 (annotated)
- Committer:
- mbedalvaro
- Date:
- Wed Mar 28 14:40:01 2012 +0000
- Revision:
- 0:345b3bc7a0ea
This version (using rigid frame, base and child classes, etc) works, but the blob is strangely smaller. Need to check this.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbedalvaro | 0:345b3bc7a0ea | 1 | /* mbed Library - ADC |
mbedalvaro | 0:345b3bc7a0ea | 2 | * Copyright (c) 2010, sblandford |
mbedalvaro | 0:345b3bc7a0ea | 3 | * released under MIT license http://mbed.org/licence/mit |
mbedalvaro | 0:345b3bc7a0ea | 4 | */ |
mbedalvaro | 0:345b3bc7a0ea | 5 | |
mbedalvaro | 0:345b3bc7a0ea | 6 | #ifndef MBED_ADC_H |
mbedalvaro | 0:345b3bc7a0ea | 7 | #define MBED_ADC_H |
mbedalvaro | 0:345b3bc7a0ea | 8 | |
mbedalvaro | 0:345b3bc7a0ea | 9 | #include "mbed.h" |
mbedalvaro | 0:345b3bc7a0ea | 10 | |
mbedalvaro | 0:345b3bc7a0ea | 11 | #define XTAL_FREQ 12000000 |
mbedalvaro | 0:345b3bc7a0ea | 12 | #define MAX_ADC_CLOCK 13000000 |
mbedalvaro | 0:345b3bc7a0ea | 13 | #define CLKS_PER_SAMPLE 64 |
mbedalvaro | 0:345b3bc7a0ea | 14 | |
mbedalvaro | 0:345b3bc7a0ea | 15 | #define ADC_SAMPLE_RATE 150000 |
mbedalvaro | 0:345b3bc7a0ea | 16 | |
mbedalvaro | 0:345b3bc7a0ea | 17 | |
mbedalvaro | 0:345b3bc7a0ea | 18 | class ADC { |
mbedalvaro | 0:345b3bc7a0ea | 19 | public: |
mbedalvaro | 0:345b3bc7a0ea | 20 | |
mbedalvaro | 0:345b3bc7a0ea | 21 | //Initialize ADC with ADC maximum sample rate of |
mbedalvaro | 0:345b3bc7a0ea | 22 | //sample_rate and system clock divider of cclk_div |
mbedalvaro | 0:345b3bc7a0ea | 23 | //Maximum recommened sample rate is 184000 |
mbedalvaro | 0:345b3bc7a0ea | 24 | ADC(int sample_rate, int cclk_div); |
mbedalvaro | 0:345b3bc7a0ea | 25 | |
mbedalvaro | 0:345b3bc7a0ea | 26 | //Enable/disable ADC on pin according to state |
mbedalvaro | 0:345b3bc7a0ea | 27 | //and also select/de-select for next conversion |
mbedalvaro | 0:345b3bc7a0ea | 28 | void setup(PinName pin, int state); |
mbedalvaro | 0:345b3bc7a0ea | 29 | |
mbedalvaro | 0:345b3bc7a0ea | 30 | //Return enabled/disabled state of ADC on pin |
mbedalvaro | 0:345b3bc7a0ea | 31 | int setup(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 32 | |
mbedalvaro | 0:345b3bc7a0ea | 33 | //Enable/disable burst mode according to state |
mbedalvaro | 0:345b3bc7a0ea | 34 | void burst(int state); |
mbedalvaro | 0:345b3bc7a0ea | 35 | |
mbedalvaro | 0:345b3bc7a0ea | 36 | //Select channel already setup |
mbedalvaro | 0:345b3bc7a0ea | 37 | void select(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 38 | |
mbedalvaro | 0:345b3bc7a0ea | 39 | //Return burst mode enabled/disabled |
mbedalvaro | 0:345b3bc7a0ea | 40 | int burst(void); |
mbedalvaro | 0:345b3bc7a0ea | 41 | |
mbedalvaro | 0:345b3bc7a0ea | 42 | /*Set start condition and edge according to mode: |
mbedalvaro | 0:345b3bc7a0ea | 43 | 0 - No start (this value should be used when clearing PDN to 0). |
mbedalvaro | 0:345b3bc7a0ea | 44 | 1 - Start conversion now. |
mbedalvaro | 0:345b3bc7a0ea | 45 | 2 - Start conversion when the edge selected by bit 27 occurs on the P2.10 / EINT0 / NMI pin. |
mbedalvaro | 0:345b3bc7a0ea | 46 | 3 - Start conversion when the edge selected by bit 27 occurs on the P1.27 / CLKOUT / |
mbedalvaro | 0:345b3bc7a0ea | 47 | USB_OVRCRn / CAP0.1 pin. |
mbedalvaro | 0:345b3bc7a0ea | 48 | 4 - Start conversion when the edge selected by bit 27 occurs on MAT0.1. Note that this does |
mbedalvaro | 0:345b3bc7a0ea | 49 | not require that the MAT0.1 function appear on a device pin. |
mbedalvaro | 0:345b3bc7a0ea | 50 | 5 - Start conversion when the edge selected by bit 27 occurs on MAT0.3. Note that it is not |
mbedalvaro | 0:345b3bc7a0ea | 51 | possible to cause the MAT0.3 function to appear on a device pin. |
mbedalvaro | 0:345b3bc7a0ea | 52 | 6 - Start conversion when the edge selected by bit 27 occurs on MAT1.0. Note that this does |
mbedalvaro | 0:345b3bc7a0ea | 53 | not require that the MAT1.0 function appear on a device pin. |
mbedalvaro | 0:345b3bc7a0ea | 54 | 7 - Start conversion when the edge selected by bit 27 occurs on MAT1.1. Note that this does |
mbedalvaro | 0:345b3bc7a0ea | 55 | not require that the MAT1.1 function appear on a device pin. |
mbedalvaro | 0:345b3bc7a0ea | 56 | When mode >= 2, conversion is triggered by edge: |
mbedalvaro | 0:345b3bc7a0ea | 57 | 0 - Rising edge |
mbedalvaro | 0:345b3bc7a0ea | 58 | 1 - Falling edge |
mbedalvaro | 0:345b3bc7a0ea | 59 | */ |
mbedalvaro | 0:345b3bc7a0ea | 60 | void startmode(int mode, int edge); |
mbedalvaro | 0:345b3bc7a0ea | 61 | |
mbedalvaro | 0:345b3bc7a0ea | 62 | //Return startmode state according to mode_edge=0: mode and mode_edge=1: edge |
mbedalvaro | 0:345b3bc7a0ea | 63 | int startmode(int mode_edge); |
mbedalvaro | 0:345b3bc7a0ea | 64 | |
mbedalvaro | 0:345b3bc7a0ea | 65 | //Start ADC conversion |
mbedalvaro | 0:345b3bc7a0ea | 66 | void start(void); |
mbedalvaro | 0:345b3bc7a0ea | 67 | |
mbedalvaro | 0:345b3bc7a0ea | 68 | //Set interrupt enable/disable for pin to state |
mbedalvaro | 0:345b3bc7a0ea | 69 | void interrupt_state(PinName pin, int state); |
mbedalvaro | 0:345b3bc7a0ea | 70 | |
mbedalvaro | 0:345b3bc7a0ea | 71 | //Return enable/disable state of interrupt for pin |
mbedalvaro | 0:345b3bc7a0ea | 72 | int interrupt_state(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 73 | |
mbedalvaro | 0:345b3bc7a0ea | 74 | //Attach custom interrupt handler replacing default |
mbedalvaro | 0:345b3bc7a0ea | 75 | void attach(void(*fptr)(void)); |
mbedalvaro | 0:345b3bc7a0ea | 76 | |
mbedalvaro | 0:345b3bc7a0ea | 77 | //Restore default interrupt handler |
mbedalvaro | 0:345b3bc7a0ea | 78 | void detach(void); |
mbedalvaro | 0:345b3bc7a0ea | 79 | |
mbedalvaro | 0:345b3bc7a0ea | 80 | //Append custom interrupt handler for pin |
mbedalvaro | 0:345b3bc7a0ea | 81 | void append(PinName pin, void(*fptr)(uint32_t value)); |
mbedalvaro | 0:345b3bc7a0ea | 82 | |
mbedalvaro | 0:345b3bc7a0ea | 83 | //Unappend custom interrupt handler for pin |
mbedalvaro | 0:345b3bc7a0ea | 84 | void unappend(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 85 | |
mbedalvaro | 0:345b3bc7a0ea | 86 | //Append custom global interrupt handler |
mbedalvaro | 0:345b3bc7a0ea | 87 | void append(void(*fptr)(int chan, uint32_t value)); |
mbedalvaro | 0:345b3bc7a0ea | 88 | |
mbedalvaro | 0:345b3bc7a0ea | 89 | //Unappend custom global interrupt handler |
mbedalvaro | 0:345b3bc7a0ea | 90 | void unappend(void); |
mbedalvaro | 0:345b3bc7a0ea | 91 | |
mbedalvaro | 0:345b3bc7a0ea | 92 | //Set ADC offset to a value 0-7 |
mbedalvaro | 0:345b3bc7a0ea | 93 | void offset(int offset); |
mbedalvaro | 0:345b3bc7a0ea | 94 | |
mbedalvaro | 0:345b3bc7a0ea | 95 | //Return current ADC offset |
mbedalvaro | 0:345b3bc7a0ea | 96 | int offset(void); |
mbedalvaro | 0:345b3bc7a0ea | 97 | |
mbedalvaro | 0:345b3bc7a0ea | 98 | //Return value of ADC on pin |
mbedalvaro | 0:345b3bc7a0ea | 99 | int read(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 100 | |
mbedalvaro | 0:345b3bc7a0ea | 101 | //Return DONE flag of ADC on pin |
mbedalvaro | 0:345b3bc7a0ea | 102 | int done(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 103 | |
mbedalvaro | 0:345b3bc7a0ea | 104 | //Return OVERRUN flag of ADC on pin |
mbedalvaro | 0:345b3bc7a0ea | 105 | int overrun(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 106 | |
mbedalvaro | 0:345b3bc7a0ea | 107 | //Return actual ADC clock |
mbedalvaro | 0:345b3bc7a0ea | 108 | int actual_adc_clock(void); |
mbedalvaro | 0:345b3bc7a0ea | 109 | |
mbedalvaro | 0:345b3bc7a0ea | 110 | //Return actual maximum sample rate |
mbedalvaro | 0:345b3bc7a0ea | 111 | int actual_sample_rate(void); |
mbedalvaro | 0:345b3bc7a0ea | 112 | |
mbedalvaro | 0:345b3bc7a0ea | 113 | //Return pin ID of ADC channel |
mbedalvaro | 0:345b3bc7a0ea | 114 | PinName channel_to_pin(int chan); |
mbedalvaro | 0:345b3bc7a0ea | 115 | |
mbedalvaro | 0:345b3bc7a0ea | 116 | //Return pin number of ADC channel |
mbedalvaro | 0:345b3bc7a0ea | 117 | int channel_to_pin_number(int chan); |
mbedalvaro | 0:345b3bc7a0ea | 118 | |
mbedalvaro | 0:345b3bc7a0ea | 119 | |
mbedalvaro | 0:345b3bc7a0ea | 120 | private: |
mbedalvaro | 0:345b3bc7a0ea | 121 | int _pin_to_channel(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 122 | uint32_t _data_of_pin(PinName pin); |
mbedalvaro | 0:345b3bc7a0ea | 123 | |
mbedalvaro | 0:345b3bc7a0ea | 124 | int _adc_clk_freq; |
mbedalvaro | 0:345b3bc7a0ea | 125 | void adcisr(void); |
mbedalvaro | 0:345b3bc7a0ea | 126 | static void _adcisr(void); |
mbedalvaro | 0:345b3bc7a0ea | 127 | static ADC *instance; |
mbedalvaro | 0:345b3bc7a0ea | 128 | |
mbedalvaro | 0:345b3bc7a0ea | 129 | uint32_t _adc_data[8]; |
mbedalvaro | 0:345b3bc7a0ea | 130 | void(*_adc_isr[8])(uint32_t value); |
mbedalvaro | 0:345b3bc7a0ea | 131 | void(*_adc_g_isr)(int chan, uint32_t value); |
mbedalvaro | 0:345b3bc7a0ea | 132 | void(*_adc_m_isr)(void); |
mbedalvaro | 0:345b3bc7a0ea | 133 | }; |
mbedalvaro | 0:345b3bc7a0ea | 134 | |
mbedalvaro | 0:345b3bc7a0ea | 135 | extern ADC adc; |
mbedalvaro | 0:345b3bc7a0ea | 136 | |
mbedalvaro | 0:345b3bc7a0ea | 137 | #endif |