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Starter Kit and User Manual for the HelloDevice 1200

Symbol Address Description

INAddrMSB 0x7F4 MSB Address of the data to be sent to host PC when interrupt is generated into

the HelloDevice from user device

INAddrLSB 0x7F5 LSB Address of the data to be sent to host PC when interrupt is generated into

the HelloDevice from user device

INLenMSB 0x7F6 MSB length of the data to be sent to host PC when interrupt is generated into the

HelloDevice from user device

INLenLSB 0x7F7 LSB length of the data to be sent to host PC when interrupt is generated into the

HelloDevice from user device

OUTAddrMSB 0x7F8 MSB Address of the data to be read by user device when interrupt is generated

into user device

OUTAddrLSB 0x7F9 LSB Address of the data to be read by user device when interrupt is generated

into user device

OUTLenMSB 0x7FA MSB length of the data to be read by user device when interrupt is generated

into user device

OUTLenLSB 0x7FB LSB length of the data to be read by user device when interrupt is generated into

user device

INTR_R 0x7FE Used that HelloDevice generates interrupt into user device.

If the HelloDevice sets this register value as 0xAA, interrupt will be generated

into user device.

INTR_L 0x7FF Used that user device generates interrupt into the HelloDevice.

If user device sets this register value as 0xAA, interrupt will be generated into

the HelloDevice.

Table 6.1. the HelloDevice Dual-Port RAM interrupt control register

6.2 Communication Protocol

To read and write the HelloDevice Dual-Port RAM remotely on the Internet, the Internet socket interface

program should be implemented on the your PC to communicate with the HelloDevice. This socket interface is

usually implemented in the form of a socket program written in C or Java applet working on the web.

The Internet socket interface should be implemented to allow the TCP/IP protocol to communicate with the

HelloDevice, and it should send Read/Write command to the TCP port 6001 and current IP address of the

HelloDevice. The HelloDevice will interpret this command to read and write Dual-Port RAM of the HelloDevice.

The communication command and corresponding response between socket interface and the HelloDevice are

summarized in Table 6.2.

Direction Command Packets

User PC the HelloDevice

Get command

Dual-Port RAM Read

Get response

Dual-Port RAM Write Set command

Table 6.2 the HelloDevice Dual-Port RAM Read/Write Command and Response

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 52 53

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