Description

8086TRAINER KIT

The 8086 trainer board is specifically designed to help students to master the required skills in the area of embedded systems. The kit is designed in such way that all the possible features of the microprocessor will be easily used by the students. MICROPROCESSOR offers more advantages than conventional discrete hardwired logic circuits. The major advantage is its programmability to adapt to different environment and in addition it reduces the PCB space

Bluetooth

Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Bluetooth technology allows electronic devices to communicate wirelessly.

Interfacing Bluetooth

Fig. 1 shows how to interface the Bluetooth with microprocessor. Bluetooth technology handles the wireless part of the communication channel; it transmits and receives data wirelessly between these devices. It delivers the received data and receives the data to be transmitted to and from a host system through a host controller interface (HCI). The most popular host controller interface today is either a UART or a USB. Here, I will only focus on the UART interface; it can be easily show how a Bluetooth module can be integrated on to a host system through a UART

Fig. 1 Interfacing Bluetooth to Microprocessor

Interfacing Bluetooth with 8086

We now want to transmit & receive the data from host system to 8086 trainer board by using Bluetooth module through 8251 interface. The serial data is taken from or sent to the host system by using Bluetooth module through MAX232

Pin Assignment with 8086

	UART DB-9 Connector	8251	Serial Port Section
UART0	TXD-0	19
	RXD-0	3

Circuit Diagram to Interface Bluetooth with 8086

Assembly Program to transmit data in 8086

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Title : Program to transmit a character from 8086 through bluetooth

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1100	Be 00 15	MOV SI,1500H
1103	B0 36	MOV AL,36H
1105	BA 06 FF	MOV DX,FF06
1108	EE	OUT DX,AL
1109	B0 40	MOV AL,40H
110B	BA 04 FF	MOV DX,FF04
110E	EE	OUT DX,AL
110F	B0 01	MOV AL,01H
1111	BA 04 FF	MOV DX,FF04
1114	EE	OUT DX,AL
1115	B1 05	RELOAD: MOV CL,05H
1117	BA 12 FF	CHECK: MOV DX,FF12
111A	EC	IN AL,DX
111B	24 04	AND AL,04H
111D	74 F8	JZ CHECK
111F	8A 04	MOV AL,[SI]
1121	BA 10 FF	MOV DX,FF10
1124	EE	OUT DX,AL
1125	46	INC SI
1126	3C 3F	CMP AL,3FH
1128	75 EB	JNZ RELOAD
112A	FE C9	DEC CL
112C	75 E9	JNZ CHECK
112E	CD 02	INT 02

In 1500h memory location enter the data to be sent serially

1500 41h

Testing the Bluetooth with 8086

Give +9V power supply to 8086 trainer board; connect the 5V adapter with Bluetooth module which is connected with the 8086 trainer board. There are two Bluetooth modules are required. One is connected with 8086 trainer board other one is connected with PC.

First connect the serial cable between 8086 trainer board & PC. Then open the Hyper Terminal screen, select which port you are using and set the default settings. Now the screen should show some text messages. If the messages are correctly displayed in Hyper Terminal, then only connect the Bluetooth modules in 8086 trainer board.

If you are not reading any data from UART, then you just check the jumper connections & just check the serial cable is working.

Pc side Bluetooth module setting

Kit side Bluetooth module setting

Source Code

The Interfacing Bluetooth module with 8086 program is very simple and straight forward, which send a message to mobiles from 8086 trainer through Bluetooth module by using UART. Some delay is occurring when a single data is sent to mobile through UART.