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FIELD UPDATES FOR FLASH BASED ST7 APPLICATIONS USING A PC COMM PORT

3 USING THE PROGRAM WITH HYPERTERMINAL

Configure HyperTerminal as follows:

1. Select FILES->PROPERTIES

2. Click the “CONNECT TO” tab

3. At “CONNECT USING” select DIRECT TO COM1, 2,3, or 4 as appropriate.

4. Click CONFIGURE and select

BITS PER SECOND: 9600

DATA BITS: 8

PARITY: none

STOP BITS: 1

FLOW CONTROL: none

5. Click the “SETTINGS” tab

6. Select EMULATION: ansi

7. Click ASCII SETUP and

– Uncheck all boxes except “Append Line Feeds to Incoming Line Ends”

– Set CHARACTER DELAY to 0 milliseconds

– Set LINE DELAY to 20 milliseconds

NOTE: A proper line delay setting is crucial to proper operation of the system. The ST7 needs

this time to store the data in an S-Records line before it is ready to receive the data from the

next line.

After HyperTerminal has been configured select FILE-> “SAVE AS” to save the program con-

figuration as a .HT file. Afterwards, just clicking the .HT file will open HyperTerminal with the

required settings.

Load the example program into the MCU, connect the target to the PC via RS232, and start up

HyperTerminal. After HyperTerminal has started, reset the MCU. After approximately five sec-

onds the MCU will transmit a single dollar sign ($) character which will appear on the PC mon-

itor. Be sure not to press any keys on the keyboard during the five second interval. If the $ is

not observed, double check the program configuration and the COMM port selection.

Once the $ character has been observed, reset the MCU and, within five seconds, press any

printable key on the keyboard. This Key will be echoed back to the monitor and will indicate

that the ST7 is now in a mode where it will wait indefinitely to receive an S-Records file update

for sector1. At this point, do the following with HyperTerminal:

1. Select TRANSFER->SEND TEXT FILE

2. Select FILES OF TYPE: all files (*.*)