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1.3.3

Random read command

The random read command allows data from the Flash program memory or data EEPROM

of the STM8 to be read, starting from any address in the range 8000h—027FFFh or

4000h—47FFh respectively.

The packet sequence to achieve a ‘random read’ with the Aardvark software and the STM8

Figure 5.

Random read packet sequence

Two steps are required to perform a random read with the Aardvark host adapter software.

Step1 sends the first address to be read from the firmware. This is done as follows:

1.

Select the master tabsheet, set the slave address and the bitrate, and uncheck the 10-

bit addressing mode option as per Section 1.3.2: Current read command on page 5.

2.

Enter the ‘start address’ in the ‘message window’ text box. It corresponds to the first

you want to read from address A000h.

3.

Check the ‘no stop’ option.

4.

Press the ‘master write’ button to send the start address to the firmware.

At the end of this command, the firmware has initialized its internal pointer address to the

address sent above.

START

ADD SLV DEVICE-W

ACK-S

Start program address

ACK-S

Current read