关键字:ATTINY85,电子蜡烛电路
想想当你好不容易跟女朋友共度烛光晚餐,却因为蜡烛点没了或打翻着火了,那是一件多么坑爹的事啊!今天为你分享一款自己diy的超自然的烛光蜡烛。
ATtiny 电子蜡烛,皮特•米尔斯开发这个伟大的蜡烛,正如我们图片所见到的一样,但怎样让这蜡烛的光芒像传统的蜡烛一样闪烁呢。
ATtiny 电子蜡烛最难的部分就闪烁神态逼真,所以皮特做了一个蜡烛光检测电阻( LDR )和固定电阻作为一个分压器。这是作为ATTINY85 ADC之中的一个输入端,并离散时间间隔的进行采样。采样速率为100毫秒。然后将采集的8bit的电频值存储到EEPROM中,以便记录蜡烛的闪烁图谱,驱动将其连接的LED、PWM形成通路。在用三节干电池供电。最后您只需编程程序,然后通过开关进行控制。
下面是ATtiny 电子蜡烛的电路图
下面是程序的代码以及写入EEPROM的数据
view plainprint? /* Program Description: This program reads a light detecting resistor thru an internal ADC and stores the value, after scaling it, to eeprom. This ADC value is sent to a PWM channel with attached led. This is essentially a data logger for light and replay by LED. If, if you aim the LDR at a flickering candle during its recording phase, you have a flickering led candle. A circuit description and other details can be found at http://petemills.blogspot.com Filename: ATTiny_Candle_v1.0.c Author: Pete Mills Int. RC Osc. 8 MHz; Start-up time PWRDWN/RESET: 6 CK/14 CK + 64 ms */ //********** Includes ********** #include #include#include //********** Definitions ********** // LED for flame simulation #define LED PB0 #define LED_PORT PORTB #define LED_DDR DDRB // Light Detecting Resistor for recording a live flame #define LDR PINB3 #define LDR_PORT PINB #define LDR_DDR DDRB // Tactile Switch Input #define SW1 PINB4 #define SW1_PORT PINB #define SW1_DDR DDRB #define ARRAY_SIZE 500 // size of the flicker array #define SAMPLE_RATE 100 // ms delay for collecting and reproducing the flicker //********** Function Prototypes ********** void setup(void); void toggle_led(void); void program_flicker(void); void led_alert(void); void eeprom_save_array(void); void eeprom_read_array(void); void scale_array(void); uint8_t get_adc(void); uint8_t scale( uint8_t input, uint8_t inp_low, uint8_t inp_hi, uint8_t outp_low, uint8_t outp_hi); uint8_t is_input_low(char port, char channel, uint8_t debounce_time, int input_block); //********** Global Variables ********** uint8_t flicker_array[ ARRAY_SIZE ] = { 0 }; uint8_t EEMEM ee_flicker_array[ ARRAY_SIZE ] = { 0 }; int main(void) { uint16_t replay = 0; setup(); eeprom_read_array(); while(1) { if( is_input_low( SW1_PORT, SW1, 25, 250 ) ) { // program the flicker // after entering and upon completion, a predetermined flash pattern will occur as described in led_alert() // aim the ldr at a flickering candle or any other light source ( like a laser ) you want to record during this time // and upon completion the values are stored to eeprom. They are played back immediately as well // as being recalled from eeprom upon first start up led_alert(); program_flicker(); scale_array(); eeprom_save_array(); led_alert(); } // replay the recorded flicker pattern OCR0A = flicker_array[ replay ]; ++replay; if( replay >= ( ARRAY_SIZE - 13 ) ) // if the end of the stored array has been reached { replay = 0; // start again from the beginning //led_alert(); } _delay_ms( SAMPLE_RATE ); _delay_ms( 3 ); // ADC Conversion time } } //********** Functions ********** void setup(void) { //********* Port Config ********* LED_DDR |= ( 1 << LED); // set PB0 to "1" for output LED_PORT &= ~( 1 << LED ); // turn the led off LDR_DDR &= ~( 1 << LDR ); // set LDR pin to 0 for input LDR_PORT |= ( 1 << LDR ); // write 1 to enable internal pullup SW1_DDR &= ~( 1 << SW1 ); // set sw1 pin to 0 for input SW1_PORT |= ( 1 << SW1 ); // write a 1 to sw1 to enable the internal pullup //********** PWM Config ********* TCCR0A |= ( ( 1 << COM0A1 ) | ( 1 << WGM01 ) | ( 1 << WGM00 ) ); // non inverting fast pwm TCCR0B |= ( 1 << CS00 ); // start the timer //********** ADC Config ********** ADMUX |= ( ( 1 << ADLAR ) | ( 1 << MUX1 ) | ( 1 << MUX0 ) ); // left adjust and select ADC3 ADCSRA |= ( ( 1 << ADEN ) | ( 1 << ADPS2 ) | ( 1 << ADPS1 ) ); // ADC enable and clock divide 8MHz by 64 for 125khz sample rate DIDR0 |= ( 1 << ADC3D ); // disable digital input on analog input channel to conserve power } void toggle_led() { LED_PORT ^= ( 1 << LED ); } uint8_t is_input_low( char port, char channel, uint8_t debounce_time, int input_block ) { /* This function is for debouncing a switch input Debounce time is a blocking interval to wait until the input is tested again. If the input tests low again, a delay equal to input_block is executed and the function returns ( 1 ) */ if ( bit_is_clear( port, channel ) ) { _delay_ms( debounce_time ); if ( bit_is_clear( port, channel ) ) { _delay_ms( input_block ); return 1; } } return 0; } uint8_t get_adc() { ADCSRA |= ( 1 << ADSC ); // start the ADC Conversion while( ADCSRA & ( 1 << ADSC )); // wait for the conversion to be complete return ~ADCH; // return the inverted 8-bit left adjusted adc val } void program_flicker() { // build the flicker array for( int i = 0; i < ARRAY_SIZE; i++ ) { flicker_array[ i ] = get_adc(); _delay_ms( SAMPLE_RATE ); } } void led_alert() { // this is a function to create a visual alert that an event has occured within the program // it toggles the led 10 times. for( int i = 0; i < 10; i++ ) { OCR0A = 0; _delay_ms( 40 ); OCR0A = 255; _delay_ms( 40 ); } } void eeprom_save_array() { for( int i = 0; i < ARRAY_SIZE; i++ ) { eeprom_write_byte( &ee_flicker_array[ i ], flicker_array[ i ] ); } } void eeprom_read_array() { for( int i = 0; i < ARRAY_SIZE; i++ ) { flicker_array[ i ] = eeprom_read_byte( &ee_flicker_array[ i ] ); } } uint8_t scale( uint8_t input, uint8_t inp_low, uint8_t inp_hi, uint8_t outp_low, uint8_t outp_hi) { return ( ( ( input - inp_low ) * ( outp_hi - outp_low ) ) / ( ( inp_hi - inp_low ) + outp_low ) ); } void scale_array() { uint8_t arr_min = 255; uint8_t arr_max = 0; uint8_t out_low = 20; uint8_t out_high = 255; // find the min and max values for( int i = 0; i < ARRAY_SIZE; i++ ) { if( flicker_array[ i ] < arr_min ) arr_min = flicker_array[ i ]; if( flicker_array[ i ] > arr_max ) arr_max = flicker_array[ i ]; } // now that we know the range, scale it for( int i = 0; i < ARRAY_SIZE; i++ ) { flicker_array[ i ] = scale( flicker_array[ i ], arr_min, arr_max, out_low, out_high ); } } igh ); } } igh ); } } } } } } } } } } } } } }
EEPROM的数据
rom.rar
声明:本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人,不代表电子发烧友网立场。文章及其配图仅供工程师学习之用,如有内容侵权或者其他违规问题,请联系本站处理。
举报投诉
发布评论请先 登录
相关推荐
基于51单片机电子称电路图及程序
本资源内容概要: 这是基于51单片机电子称电路图及程序设计包含了电路图源文件(Altiumdesigner软件打开)、C语言程序源代码(keil软件打开)。本资源适合人群
发表于 06-21 14:33
•0次下载
单片机电子时钟时间误差如何调整有效?
单片机电子时钟时间误差如何调整有效? 单片机电子时钟的时间误差可以通过以下几种方式进行调整和校正: 1. 外部校准:使用外部可靠的时钟源(例如GPS接收模块、无线电接收电台等)来校准单片机电子
单片机电子时钟功能介绍
单片机电子时钟是一种基于微处理器和数字时钟显示技术的计时装置。它通过内部的晶振电路精确地计算时间,并将结果显示在数字时钟面板上。在现代生活中,电子时钟已经成为了人们日常生活中不可或缺的一部分,它可
单片机如何检测电流?
单片机如何检测电流? 随着科技的发展,单片机技术在电子设备中得到了广泛应用。其中,电流检测是单片机的一个重要功能之一。本文将详细介绍单片机电
评论