Lecture6.pptx
- 1. MICROPROCESSORS CMPE-451 Department of Computer Engineering Serial Communication-1
- 2. Three protocols USART SPI I2C USART: Simplest way to establish a connection between an AVR microcontroller and a computer (or another microcontroller).
- 3. Elif Damla 12 5 V Gnd R1 LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1
- 4. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1
- 5. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 0 Send start bit
- 6. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 00
- 7. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 000
- 8. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 0001
- 9. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 00011
- 10. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 000110
- 11. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 0001100
- 12. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 00011000
- 13. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 000110000
- 14. Elif Damla 12 5 V R1 Gnd LED 00001100 Button Press=0=LED off No press = 1= LED on Send LSB first freq of button press = 1 press/sec Start-bit = 0 Stop-bit = 1 Rcvd-bits = 0001100001 Flip the bits = 1000011000 Data-bits = 00001100 = 12 Send stop bit