#include <stdint.h>#include <stdlib.h>#include <string.h>#include <avr/interrupt.h>#include <avr/io.h>#include <avr/pgmspace.h>#include <avr/sleep.h>#include <avr/wdt.h>#include "config.h"#include "lcd_spi.h"#include "ad7714.h"#include "serial.h"#include "rotary_switch.h"volatile uint32_t time_ctr = 0;volatile uint16_t menu_show_delay=0;volatile uint8_t misc_delay=0;uint8_t menu_item=0, menu_visible=0;#define MENU_ZERO 0#define MENU_GAIN 1#define MENU_CHAN 2#define MENU_BUFFER 3#define MENU_RATE 4#define MENU_BACKLIGHT 5#define NUM_MENU_ITEMS 6ad7714params_t params;uint8_t rate_idx = 0;uint8_t buffer = 1;uint32_t softzero = 0x800000;uint8_t want_set_params=0;uint8_t backlight = 0;volatile uint32_t average_val=0x800000;void my_delay(uint8_t ms) {	misc_delay = ms;	while(misc_delay) {		wdt_reset();		set_sleep_mode(SLEEP_MODE_IDLE);		sleep_mode();	}}ISR(TIMER1_COMPA_vect) {	time_ctr++;	rotary_bounce_tick();	if(menu_show_delay) menu_show_delay--;	if(misc_delay) misc_delay--;}static void ioinit(void) {	TCCR1A = 0;	TCCR1B = _BV(CS10) | _BV(CS12) | _BV(WGM12);	OCR1A = 15; // almost a millisecond	TIMSK1 = _BV(OCIE1A);	init_serial();	init_rotary();	// PB5 = SCK, PB4 = MISO, PB3 = MOSI	// PB2 = !SS is set to output in ad7714.c but must be set here in	// order for SPI to work during LCD initialization.	DDRB |= (_BV(PB5) | _BV(PB3) | _BV(PB2));	DDRB &= ~(_BV(PB4));	PORTB |= _BV(PB4); // prevent floating input	// enable, master, clock=fosc/128	//SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR1) | _BV(SPR0);	// enable, master, clock=fosc/16	SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR0);	sei();	wdt_enable(WDTO_2S);}///////////////////void printAdcVal(uint32_t val, uint8_t is_line2) {	char s[40];	if(is_line2) LcdLine2();	else LcdLine1();	if(!is_line2) {		print_uint32(time_ctr);	}	double dval = ((double)((int32_t)val - (int32_t)softzero) / (double)0x800000) * 2.5;	dval /= (double)(1 << params.gain_param);	dtostrf(dval, 11, 8, s);	if(!is_line2) {		putchr(' ');		printstr(s);		putchr('\n');	}	LcdWriteStr(s);	LcdWriteStr("   ");	ltoa(val, s, 16);	zeropad(s, 6);	LcdWriteStr(s);}static void do_menu() {	char s[25];	if(menu_visible && !menu_show_delay) {		printAdcVal(average_val, 1);		menu_visible = 0;	}	int8_t rotary1, rotary2;	get_rotary(&rotary1, &rotary2);	if(!rotary1 && !rotary2) return;	if(!menu_show_delay) rotary2 = 0;	menu_show_delay = 3000;	menu_visible = 1;	if(rotary2) {		if(rotary2 ==  1) {			if(menu_item == NUM_MENU_ITEMS-1) menu_item = 0;			else menu_item++;		} else if(rotary2 == -1) {			if(menu_item) menu_item--;			else menu_item = NUM_MENU_ITEMS-1;		}		rotary1 = rotary2 = 0;	}	LcdLine2();	if(menu_item == MENU_ZERO) {		if(rotary1) {			softzero = average_val;			menu_show_delay = 0;		}		LcdWriteStr("Zero=");		ltoa(softzero, s, 16);		zeropad(s, 6);		LcdWriteStr(s);	} else if(menu_item == MENU_GAIN) {		if(rotary1) {			params.gain_param = (params.gain_param + rotary1) & 7;			want_set_params = 1;		}		LcdWriteStr("Gain=");		ltoa((1<<params.gain_param), s, 10);		LcdWriteStr(s);	} else if(menu_item == MENU_CHAN) {		if(rotary1) {			params.chan = (params.chan + rotary1) & 7;			want_set_params = 1;		}		LcdWriteStr("Channel=");		LcdWriteStr(ad7714chan_name(params.chan));	} else if(menu_item == MENU_BUFFER) {		if(rotary1) {			buffer = !buffer;			ad7714set_buffer(buffer);			LcdClearLine1();			LcdLine2(); 		}		LcdWriteStr("Buffer=");		LcdWriteStr(buffer ? "On" : "Off");	} else if(menu_item == MENU_RATE) {		uint8_t rate_changed = 0;		if(rotary1==-1 && rate_idx) {			rate_idx--;			rate_changed++;		} else if(rotary1==1 && ad7714standard_rate(rate_idx+1)) {			rate_idx++;			rate_changed++;		}		if(rate_changed) {			params.rate = ad7714standard_rate(rate_idx);			want_set_params = 1;		}		LcdWriteStr("Rate=");		double hz = ad7714rate_to_hertz(params.rate);		dtostrf(hz, 5, 2, s);		LcdWriteStr(s);		LcdWriteStr("Hz");	} else if(menu_item == MENU_BACKLIGHT) {		if(rotary1) {			backlight = !backlight;			LcdBacklight(backlight);		}		LcdWriteStr("Backlight ");		LcdWriteStr(backlight ? "On" : "Off");	}	LcdClearToEnd();}int main(void) {	ioinit();	printstr_p(PSTR("\nHello.\n"));	LcdSetup();	LcdBacklight(backlight);	LcdClearLine2();	LcdClearLine1();	LcdWriteStr_p(PSTR("Initializing..."));	params.gain_param = 0;	params.chan = 4;	params.rate = ad7714standard_rate(0);	ad7714init();	ad7714set_buffer(buffer);	ad7714setup(params);	uint16_t num_idle = 0;	for(;;) {		wdt_reset();		if(ad7714have_capture()) {			num_idle=0;			if(ad7714accum_count() > 20) {				average_val = ad7714pull_average();				if(!menu_visible) printAdcVal(average_val, 1);			}			printAdcVal(ad7714get_capture(), 0);		} else {			num_idle++;			// wake on timer tick or on DRDY interrupt			set_sleep_mode(SLEEP_MODE_IDLE);			sleep_mode();		}		/*		if(chr_avail() && getchr() == 27) {			captureEnable(0);			spi_debug();			captureEnable(1);		}		*/		do_menu();		if(want_set_params && ad7714can_set_params()) {			ad7714setup(params);			LcdClearLine1();			want_set_params = 0;			softzero = 0x800000;		}	}}/*static uint8_t SPIverbose(uint8_t v) {	uint8_t ret = SPIquiet(v);	char s[15];	printstr_p(PSTR("("));	ltoa(v, s, 16); zeropad(s, 2); printstr(s);	printstr_p(PSTR(","));	ltoa(ret, s, 16); zeropad(s, 2); printstr(s);	printstr_p(PSTR(") "));//	printstr_p(PSTR(" / "));//	ltoa(v, s, 2); zeropad(s, 8); printstr(s);//	printstr_p(PSTR(" => "));//	ltoa(ret, s, 2); zeropad(s, 8); printstr(s);//	putchr('\n');	return ret;}static uint8_t hex2nib(char c) {	if(c >= '0' && c <= '9') return c-'0';	if(c >= 'a' && c <= 'f') return c-'a'+10;	if(c >= 'A' && c <= 'F') return c-'A'+10;	return 0xff;}void spi_debug() {	for(;;) {		OUTER:		printstr_p(PSTR("DebugSPI> "));		int i;		uint8_t v=0;		for(i=0; i<2; i++) {			v <<= 4;			char c;			uint8_t nib;			do {				c = getchr();				if(c == 27) {					return;				} else if(c == 'q') {					freeport();					grabport();					printstr_p(PSTR("Toggled CS\n"));					goto OUTER;				}				nib = hex2nib(c);			} while(nib == 0xff);			putchr(c);			v += nib;		}		putchr('\n');		grabport();		SPIverbose(v);		freeport();		putchr('\n');	}}*/