![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Simple guitar tuner
Diff: ADC_full/adc.h
- Revision:
- 0:490e67fb09c2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ADC_full/adc.h Mon Oct 24 23:03:27 2011 +0000 @@ -0,0 +1,131 @@ +/* mbed Library - ADC + * Copyright (c) 2010, sblandford + * released under MIT license http://mbed.org/licence/mit + */ + +#ifndef MBED_ADC_H +#define MBED_ADC_H + +#include "mbed.h" +#define XTAL_FREQ 12000000 +#define MAX_ADC_CLOCK 13000000 +#define CLKS_PER_SAMPLE 64 + +class ADC { +public: + + //Initialize ADC with ADC maximum sample rate of + //sample_rate and system clock divider of cclk_div + //Maximum recommened sample rate is 184000 + ADC(int sample_rate, int cclk_div); + + //Enable/disable ADC on pin according to state + //and also select/de-select for next conversion + void setup(PinName pin, int state); + + //Return enabled/disabled state of ADC on pin + int setup(PinName pin); + + //Enable/disable burst mode according to state + void burst(int state); + + //Select channel already setup + void select(PinName pin); + + //Return burst mode enabled/disabled + int burst(void); + + /*Set start condition and edge according to mode: + 0 - No start (this value should be used when clearing PDN to 0). + 1 - Start conversion now. + 2 - Start conversion when the edge selected by bit 27 occurs on the P2.10 / EINT0 / NMI pin. + 3 - Start conversion when the edge selected by bit 27 occurs on the P1.27 / CLKOUT / + USB_OVRCRn / CAP0.1 pin. + 4 - Start conversion when the edge selected by bit 27 occurs on MAT0.1. Note that this does + not require that the MAT0.1 function appear on a device pin. + 5 - Start conversion when the edge selected by bit 27 occurs on MAT0.3. Note that it is not + possible to cause the MAT0.3 function to appear on a device pin. + 6 - Start conversion when the edge selected by bit 27 occurs on MAT1.0. Note that this does + not require that the MAT1.0 function appear on a device pin. + 7 - Start conversion when the edge selected by bit 27 occurs on MAT1.1. Note that this does + not require that the MAT1.1 function appear on a device pin. + When mode >= 2, conversion is triggered by edge: + 0 - Rising edge + 1 - Falling edge + */ + void startmode(int mode, int edge); + + //Return startmode state according to mode_edge=0: mode and mode_edge=1: edge + int startmode(int mode_edge); + + //Start ADC conversion + void start(void); + + //Set interrupt enable/disable for pin to state + void interrupt_state(PinName pin, int state); + + //Return enable/disable state of interrupt for pin + int interrupt_state(PinName pin); + + //Attach custom interrupt handler replacing default + void attach(void(*fptr)(void)); + + //Restore default interrupt handler + void detach(void); + + //Append custom interrupt handler for pin + void append(PinName pin, void(*fptr)(uint32_t value)); + + //Unappend custom interrupt handler for pin + void unappend(PinName pin); + + //Append custom global interrupt handler + void append(void(*fptr)(int chan, uint32_t value)); + + //Unappend custom global interrupt handler + void unappend(void); + + //Set ADC offset to a value 0-7 + void offset(int offset); + + //Return current ADC offset + int offset(void); + + //Return value of ADC on pin + int read(PinName pin); + + //Return DONE flag of ADC on pin + int done(PinName pin); + + //Return OVERRUN flag of ADC on pin + int overrun(PinName pin); + + //Return actual ADC clock + int actual_adc_clock(void); + + //Return actual maximum sample rate + int actual_sample_rate(void); + + //Return pin ID of ADC channel + PinName channel_to_pin(int chan); + + //Return pin number of ADC channel + int channel_to_pin_number(int chan); + + +private: + int _pin_to_channel(PinName pin); + uint32_t _data_of_pin(PinName pin); + + int _adc_clk_freq; + void adcisr(void); + static void _adcisr(void); + static ADC *instance; + + uint32_t _adc_data[8]; + void(*_adc_isr[8])(uint32_t value); + void(*_adc_g_isr)(int chan, uint32_t value); + void(*_adc_m_isr)(void); +}; + +#endif \ No newline at end of file