{"id":1131,"date":"2016-01-26T13:50:09","date_gmt":"2016-01-26T13:50:09","guid":{"rendered":"http:\/\/wp.andreas.bieri.name\/myblog\/?p=1131"},"modified":"2016-01-26T13:50:09","modified_gmt":"2016-01-26T13:50:09","slug":"democode-tastenentprellung-mikro-c","status":"publish","type":"post","link":"http:\/\/wp.andreas.bieri.name\/myblog\/2016\/01\/26\/democode-tastenentprellung-mikro-c\/","title":{"rendered":"Democode Tastenentprellung (Mikro C)"},"content":{"rendered":"

Der Mikro C Compiler verh\u00e4lt sich etwas anders als die Arduino Umgebung, darum hier eine angepasste Version der Tastenentprellungsroutine. F\u00fcr die Arduino-Version siehe hier<\/a>.<\/p>\n

Link: http:\/\/www.mikrocontroller.net\/articles\/AVR-Tutorial:_Tasten<\/a><\/p>\n

 <\/p>\n

Debounced_Keys_example.c<\/strong><\/p>\n

\/* ========================================================================<\/span>
\n * Tasteneingaben<\/span>
\n * erweitertes Beispielprogramm nach Idee von Peter Dannegger, portiert auf mikroC Pro<\/span>
\n * ————————————————————————————–<\/span>
\n * Version: 1.0 f\u00fcr mikroC Pro<\/span>
\n * Liest bis zu 8 Taster an einem Port aus und entprellt sie, es k\u00f6nnen kurze und lange<\/span>
\n * Tastendr\u00fccke erkannt werden, ebenso gibt es eine Autorepeat-Funktion<\/span>
\n * ————————————————————————————–<\/span>
\n * zur Portierung:<\/span>
\n * 1) mikroC Pro kennt #warning nicht<\/span>
\n * 2) includes sind nicht n\u00f6tig, \u00fcber search paths einbindbar (aus Arduino)<\/span>
\n * 3) typedef m\u00fcssen im lokalen File stehen, unit8_t etc.<\/span>
\n * 4) sei(),cli() ist als Macro nachgebildet<\/span>
\n * 5) Interrupts so: void timerinterrupt( void ) org IVT_ADDR_TIMER0_OVF<\/span>
\n * Definitionen in ATMEGA16.c (Ctrl-Alt-D)<\/span>
\n* ========================================================================<\/span>
\n *\/<\/span><\/p>\n

\/\/#include <stdint.h>\n\/\/#include <io.h>\n\/\/#include <interrupt.h>\n\n#ifndef F_CPU\n#define F_CPU 8000000 \/\/ processor clock frequency\n\/\/#warning kein F_CPU definiert\n#endif\n\n#define KEY_DDR DDRB \/\/ alles Tasten am Port B gleichzeitig auslesbar\n#define KEY_PORT PORTB\n#define KEY_PIN PINB\n#define KEY0 0\n#define KEY1 1\n#define KEY2 2\n#define KEY3 3\n#define ALL_KEYS (1<<KEY0 | 1<<KEY1 | 1<<KEY2 | 1<<KEY3)\n\n#define REPEAT_MASK (1<<KEY2 | 1<<KEY3) \/\/ repeat: key2\n#define REPEAT_START 100 \/\/ after 1000ms\n#define REPEAT_NEXT 10 \/\/ every 100ms\n#define LONG_MASK (1<<KEY1) \/\/ secondary action on long press: key1\n#define LONG_START 100 \/\/ after 1000ms\n#define LONG_NEXT 10 \/\/ every 100ms\n\n#define LED_DDR DDRC\n#define LED_PORT PORTC\n#define LED0 0\n#define LED1 1\n#define LED2 2\n\n#define CLI SREG_I_bit = 0;\n#define SEI SREG_I_bit = 1;\n\ntypedef unsigned short uint8_t;\ntypedef signed int int16_t;\n\nvolatile uint8_t key_state; \/\/ debounced and noninverted key state:\n \/\/ bit = 0: key pressed\nvolatile uint8_t key_press; \/\/ key press detect\nvolatile uint8_t key_rpt; \/\/ key long press and repeat\nvolatile uint8_t key_long; \/\/ key long press no repeat\n<\/pre>\n
void timerinterrupt( void ) org IVT_ADDR_TIMER0_OVF \/\/ every 10ms\n{\n static uint8_t ct0, ct1, rpt, secac;\n volatile uint8_t i;\n\n TCNT0 = (uint8_t)(int16_t)-(F_CPU \/ 1024 * 10e-3 + 0.5); \/\/ preload for 10ms\n\n i = key_state ^ KEY_PIN; \/\/ key changed ?\n ct0 = ~( ct0 & i ); \/\/ reset or count ct0\n ct1 = ct0 ^ (ct1 & i); \/\/ reset or count ct1\n i &= ct0 & ct1; \/\/ count until roll over ?\n key_state ^= i; \/\/ then toggle debounced state\n key_press |= key_state & i; \/\/ 0->1: key press detect\n \/\/ missing: reset key repeat when key is released\n\n if( (key_state & LONG_MASK) == 0 ) \/\/ check secondary function\n secac = LONG_START; \/\/ start delay\n if( --secac == 0 ){\n key_long |= key_state & LONG_MASK;\n }\n if( (key_state & REPEAT_MASK) == 0 ) \/\/ check repeat function\n rpt = REPEAT_START; \/\/ start delay\n if( --rpt == 0 ){\n rpt = REPEAT_NEXT; \/\/ repeat delay\n key_rpt |= key_state & REPEAT_MASK;\n }\n}\n<\/pre>\n
\/\/\n\/\/ check if a key has been pressed. Each pressed key is reported only once\n\/\/\nuint8_t get_key_press( uint8_t key_mask )\n{\n CLI \/\/ interrupt disable\n key_mask &= key_press; \/\/ read key(s)\n key_press ^= key_mask; \/\/ clear key(s)\n SEI\n return key_mask;\n}\n<\/pre>\n
\/\/\n\/\/ check if a key has been pressed long enough such that the\n\/\/ key repeat functionality kicks in. After a small setup delay\n\/\/ the key is reported beeing pressed in subsequent calls\n\/\/ to this function. This simulates the user repeatedly\n\/\/ pressing and releasing the key.\n\/\/\nuint8_t get_key_rpt( uint8_t key_mask )\n{\n CLI; \/\/ read and clear atomic !\n key_mask &= key_rpt; \/\/ read key(s)\n key_rpt ^= key_mask; \/\/ clear key(s)\n SEI;\n return key_mask;\n}\n<\/pre>\n
\/\/\n\/\/ check if a key has been pressed long enough such that the\n\/\/ secondary functionality kicks in.\n\/\/\nuint8_t get_key_long( uint8_t key_mask )\n{\n CLI; \/\/ read and clear atomic !\n key_mask &= key_long; \/\/ read key(s)\n key_long ^= key_mask; \/\/ clear key(s)\n SEI;\n return key_mask;\n}\n<\/pre>\n
\/\/\n\/\/ read key state and key press atomic !\n\/\/\nuint8_t get_key_short( uint8_t key_mask )\n{\n CLI;\n return get_key_press( ~key_state & key_mask );\n}\n<\/pre>\n
void main( void )\n{\n uint8_t j;\n KEY_DDR &= ~ALL_KEYS; \/\/ konfigure key port for input\n KEY_PORT |= ALL_KEYS; \/\/ and turn on pull up resistors\n\n TCCR0 = (1<<CS02)|(1<<CS00); \/\/ divide by 1024\n TIMSK = 1<<TOIE0; \/\/ enable timer interrupt\n\n LED_PORT = 0xFF; \/\/ switch on all LEDs\n LED_DDR = 0xFF;\n\n SEI; \/\/ enable interrupts\n\n while(1){\n if( get_key_short( 1<<KEY0 )) \/\/ kurzer Tastendruck schaltet LED um\n LED_PORT ^= 1<<LED0;\n if( get_key_long (1<<KEY1 )) \/\/ langer Tastendruck schaltet LED um\n LED_PORT ^= 1<<LED1;\n\n \/\/ langer Tastendruck mit Autorepeat, die LEDS schalten sich der Reihe nach um,\n \/\/ solange die Taste gedr\u00fcckt bleibt\n if( get_key_press( 1<<KEY2 ) || get_key_rpt( 1<<KEY2 ))\n { j = LED_PORT;\n j = (j & 0x07) | ((j << 1) & 0xF0);\n if( j < 0xF0 )\n j |= 0x08;\n LED_PORT = j;\n }\n\n \/\/ und invertieren\n if( get_key_press( 1<<KEY3 ) || get_key_rpt( 1<<KEY3 ))\n {\n LED_PORT ^= 0xF8;\n }\n }\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
Der Mikro C Compiler verh\u00e4lt sich etwas anders als die Arduino Umgebung, darum hier eine angepasste Version der Tastenentprellungsroutine. F\u00fcr die Arduino-Version siehe hier. Link: http:\/\/www.mikrocontroller.net\/articles\/AVR-Tutorial:_Tasten   Debounced_Keys_example.c \/* ======================================================================== * Tasteneingaben * erweitertes Beispielprogramm nach Idee von Peter Dannegger, portiert auf mikroC Pro * ————————————————————————————– * Version: 1.0 f\u00fcr mikroC Pro * Liest bis […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[38],"yoast_head":"\nDemocode Tastenentprellung (Mikro C) - Merkbar.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/52.29.166.97\/myblog\/2016\/01\/26\/democode-tastenentprellung-mikro-c\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Democode Tastenentprellung (Mikro C) - Merkbar.\" \/>\n<meta property=\"og:description\" content=\"Der Mikro C Compiler verh\u00e4lt sich etwas anders als die Arduino Umgebung, darum hier eine angepasste Version der Tastenentprellungsroutine. F\u00fcr die Arduino-Version siehe hier. 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