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1.3.2

Current read command

The current read command allows data from the Flash program memory of the STM8 to be

read, starting from the current address. This address is set to 4000h after a firmware reset.

The packet sequence to achieve a ‘current read’ is summarized in Figure 2.

Figure 2.

Current read packet sequence

The following points explain how to read different bytes using the Aardvark software, starting

from the reset address (4000h):

1.

Select the master tabsheet.

2.

Set the bitrate to 100 kHz or 400 kHz using the ‘bitrate’ field and the ‘set’ button.

3.

Set the slave address to 51h (corresponding to the firmware address A2h) in the slave

address field.

4.

Uncheck the ‘10-bit addressing mode’ option because the firmware uses 7-bit

addressing mode only.

5.

Uncheck the ‘no stop’ option.

6.

Enter the number of bytes to be read in the ‘number of bytes’ field. A value from 1 to

255 can be entered.

7.

Press the ‘master read’ button.

8.

The number of bytes to be read can be changed by pressing the master read button

again.

The read values are displayed in the transaction log window of the Aardvark software.

At the end of this command, the LCD displays the message ‘reading done’.

Figure 3 illustrates points 1 to 8 of a current read command.

START

ADD SLV DEVICE-R

ACK-S

Bytes read from STM8

STOP

ACK-M

ACKF