supplies a vehicle with 12V, while type B supplies the vehicle with 24 voltage. As a standard, the OBD-II connector is required to be within 2 feet of the steering wheel. Manufacturers have the option of implementing among five signaling protocols, the only ones permitted with the OBD-II interface. For example, one of the five protocols, the SAE J1850 VPW, known as, variable pulse width is the standard of General Motors. This standard includes a high voltage of +5 V, a message length restriction of 12 bytes, and a multi-master arbitration scheme. 5.8 RS-232 In order to establish the connection between the OBD-II IC and the OBD-II connector on the user’s vehicle we will be utilizing an RS232 interface. This interface will be responsible for establishing the serial connection present in the vehicle. In this standard user data is sent as a time-series of bits. As this is a form of serial communication it is similar to UART. Neither of these devices will serve as a slave or master, and the clock must be defined on both devices in order for the communication to be successful. Communication using this ranges from +3 to +15 volts. For data transmission lines logic 1 is defined as a negative voltage. Logic 0 is positive and the signal condition is termed “space”. 5.9 git Git is free and open source version control system. We will be able to host our own git server on a virtual machine or we will be able to create a repository on a website such as Github or BitBucket. Utilizing git will us to collaborate on the paper and keep track of changes. In addition, this will give us a centralized place to work on the paper, so in the event of an accident the paper will still be intact. We will also be utilizing version control for the microcontroller software development process.
supplies a vehicle with 12V, while type B supplies the vehicle with 24 voltage. As a standard, the OBD-II connector is required to be within 2 feet of the steering wheel. Manufacturers have the option of implementing among five signaling protocols, the only ones permitted with the OBD-II interface. For example, one of the five protocols, the SAE J1850 VPW, known as, variable pulse width is the standard of General Motors. This standard includes a high voltage of +5 V, a message length restriction of 12 bytes, and a multi-master arbitration scheme. 5.8 RS-232 In order to establish the connection between the OBD-II IC and the OBD-II connector on the user’s vehicle we will be utilizing an RS232 interface. This interface will be responsible for establishing the serial connection present in the vehicle. In this standard user data is sent as a time-series of bits. As this is a form of serial communication it is similar to UART. Neither of these devices will serve as a slave or master, and the clock must be defined on both devices in order for the communication to be successful. Communication using this ranges from +3 to +15 volts. For data transmission lines logic 1 is defined as a negative voltage. Logic 0 is positive and the signal condition is termed “space”. 5.9 git Git is free and open source version control system. We will be able to host our own git server on a virtual machine or we will be able to create a repository on a website such as Github or BitBucket. Utilizing git will us to collaborate on the paper and keep track of changes. In addition, this will give us a centralized place to work on the paper, so in the event of an accident the paper will still be intact. We will also be utilizing version control for the microcontroller software development process.
eel4914final.docx