SENA HD1200 - Manual (Page 35)

Starter Kit and User Manual for the HelloDevice 1200
32
byte.
Number of Bytes Type
1 2 3 4 5 6 7 ~
Write
command 0x78 Dual-Port RAM
Address
(0x000 ~ 0x7EF) Data length
(0x001 ~ 0x5AA) Interrupt
Flag Data
(Max. 1450 bytes)
Table 6.5. the HelloDevice Dual-Port RAM Write protocol
If you want to generate interrupt into user device after writing data to Dual-Port RAM, you have to set interrupt
flag as 0xAA when you transmit TCP packet.
Let’s say that you want to write a 4-byte data of 0x12345678 to the Dual-Port RAM address 0x0FF of the
HelloDevice, you should send the command as listed in table 6.6.
0x78 0x00 0xFF 0x00 0x04 0xAA 0x12 0x34 0x56 0x78
Command Address Length Interrupt Data
Table 6.6. Example of Dual-Port RAM Write command
6.3 Setting Up Hardware
6.3.1 the HelloDevice Dual-Port RAM Demo Board
A Demo Board is designed to supply power to the HelloDevice, to provide interface with Ethernet by RJ45
connector, and to communicate with your board through Dual-Port RAM using Dual-Port RAM interface
connector. Depending on the your board implementation, he can run simple I/O control demo and A/D converter
demo by using built-in components of the Demo Board. Demo Board is composed of the following modules.
!" The HelloDevice interface
−
40 pin connector for the HelloDevice interface
!" User board interface
−
1 channel A/D converter
−
4 point Input switch / 4 point output LED
−
26 pin Dual-Port RAM interface connector
−
20 pin I/O, A/D converter interface connector
!" Power adapter jack