Embedded Essays

Inserted Essays Inserted Essay Inserted Essay Paper II Section : II Embedded Systems INDEX No 1 2 3 4 5 6 7 8 9 10 Toggle Port LED Simulate Binary Counter at Port Generate postpone utilizing TIMER_0 Stepper Motor (clockwise/Anticlockwise) Generating square wave at port pin Generating Triangular wave at port pin Sine wave age utilizing look-into table Microcontrollers imparting over a sequential connection Read change status from I/p port and show at o/p port Using Input Capture Pin (ICP), measure beat width show at o/p port Topic Date 6-9-2010 9-9-2010 17-9-2010 24-9-2010 8-10-2010 15-10-2010 15-10-2010 29-10-2010 22-11-2010 24-11-2010 Page 02 03 04 06 07 09 10 11 13 15 Sign Practical †01 Toggle Port LED Aim : Write a program in installed C programming language to on the other hand ON/OFF LEDs associated with 2 distinct ports. Segments Used: i)AT90S8535 Micro controller ii)LED? S iii)Ground Code: #include void main(void) { DDRA = 0xff; PORTA = 0x00; DDRB = 0xff; PORTB = 0x00; while(1) { delay_ms(100); PORTA = 0x01; PORTB = 0x00; delay_ms(100); PORTA = 0x00; PORTB = 0x01; }; } Output: Mithibai College:- MSC COMPUTER SCIENCE PART II 3 Down to earth †02 Simulate Binary Counter at Port Aim : Write a program utilizing inserted C to reenact a double counter. Segments Used: i)AT90S8535 Micro controller ii)LED? S iii)Ground Code: #include void fundamental() { DDRA = 0xff; PORTA=0x00; while(1) { delay_ms(100); if(PORTA == 0x80) PORTA = 0x01; else PORTA += 1; } Description: First proclamation an unsigned roast variable (unsigned whole numbers are utilized to build the scope of numbers the variable can hold) is instated to 0x01 . port A has been set to this variable . „+? perator represents bit increase activity . we are incrimenting the bit of led_status to one situation of paired number when the one at lsb scopes to the msb (0x80) of the variable we reinitialize the variable to 0x01. The Delay given is of one milli second so the bit shifts after each one second(1000ms) . Yield: Mithibai College:- MSC COMPUTER SCIENCE PART II 4 Practical †03 Generate defer utilizing TIMER_0 Aim : Write a program utilizing inserted C to create postpone utilizing TIMER0. Segments Used: i)AT90S8535 Micro controller ii)LED? S iii)Ground Code: #include int timeCount = 0; interrupt[TIM0_OVF] void timer0_ovf_isr(void) { TCNT0 = 6; if(++timeCount == 1000) { PORTA =PORTA ^ 0x01; timeCount = 0; } void main(void) { DDRA = 0x01; PORTA = 0x01; TCCR0 = 0x02; TIMSK = 0x01; #asm(sei); while(1); } Description: A variable timecount is instated to 0. In the primary capacity the LSB of PORTA is picked for yield and it is set to 1. At that point the TIMER COUNTER CONTROL REGISTER (TCCR0) is instated so that partition by 8 (CK/8)clock source is chosen again the â€Å"timer intrude on veil is set to empower the timer0 counter. #asm† is a low level computing construct guidance „sei? represents set empower hinders to empower all the intrudes. Finaly ainfinite while circle. At that point the capacity with keword hinder is made. This capacity will be called naturally when the timer0 flood intrude on happens. This capacity returns nothing, since it isn't called by any capacity and you cannot pass anything to work for a similar explanation . The timer0 is instated to 6 in this capacity . As we have picked ck/8 framework as referenced above and the clock recurrence is 4 Mhz that? s why 4/8 Mhz so 500 Khz(0. Mhz) will be the powerful recurrence so for one tick of counter 1/0. 5 smaller scale sec are required(1/freq. = time) that equivalents to 2 smaller scale secondes. A clock can tally 256 that? s why aggregate of 256*2 that is 512 miniaturized scale seconds are required . So to make it a round figure I. e. 500 microsecs we Mithibai College:- MSC COMPUTER SCIENCE PART II 5 need to preclude 6 ticks of counters that is the reason we set clock (TCNT0 =6) to 6 with the goal that it ticks from 6 to 256 henceforth ticks successfully for multiple times (250*2 = 500). also, covers 500 smaller scale secs ,when timecount is augmented up to 1000 (1000*500 miniaturized scale secs = 0. secs). What's more, drove flips after 0. 5 secs. Yield: Mithibai College:- MSC COMPUTER SCIENCE PART II 6 Practical †04 Stepper Motor (Clockwise/Anticlockwise) Aim : Write a program utilizing i mplanted C to recreate Stepper Motor(Clockwise/AntiClockwise). Parts Used: i)AT90S8535 Micro controller ii)LED? S iii)Ground iv)STEPPER MOTOR Code: #include unsigned roast motorStatus = 0x01; void main(void) { DDRA = 0x0f; DDRB = 0x0f; #asm(sei); while(1) { PORTA = motorStatus; PORTB = motorStatus; delay_ms(200); motorStatus