Learn and Serve

Robert Bosch interview question Location: Coimbatore tidal park                                 Date: 12-04-2014 Job openings: Embedded c developer Requirement: Embedded c language, any controller knowledge, SPI, I2C, UART communication protocol, knowledge about sensors. Interview: 3 rounds Round 1 – technical (face to face) – technical question Round 2 – technical (face to face) - technical questions Round 1 – HR (face to face) – salary discussion and personal information Question asked on interview: Harvard architecture Von numen architecture Types of motor Architecture used in 8051, pic and ARM Difference between Harvard & von numen architecture What happen interrupt execute Difference between UART and I2C Induction motor How to swap a values between two variable in single instru...

TO CREATE EXACT 1 MILLISECOND DELAY IN PIC16F877A USING INBUILT DELAY FUNCTION   #define _XTAL_FREQ 20000000 is to initialize the operating frequency of the micro controller.  DELAY IN MILLISECOND : __delay_ms(500); is the function to create 500 millisecond, 500 is the number of millisecond and ms is to indicate millisecond  DELAY IN MICROSECOND: then u want to create delay in microsecond, u just replace __delay_ ms( )  and use  __delay_us( ); ie __delay_us(500) .  __delay_us(500); is to create 500 microsecond delay. u need exact 1 second means __delay_ms(1000); U CAN DOWNLOAD THE COMPLETE MPLAB IDE PROJECT FILE WITH PROGRAM + PROTEUS SIMULATION HERE download here