AVR069

5

8015B-AVR-02/06

3.1.6 CMD_FIRMWARE_UPGRADE

When the host is trying to connect to the programmer, it checks the firmware version.

A firmware upgrade is initiated if a newer version is available on the PC.

The AVRISP mkII can “reboot” into upgrade mode by using this command.

Table 3-12. Command format

Field

Size

Value

Description

Command ID

1 byte

CMD_FIRMWARE_UPGRADE

Command id

Parameter ID

9 bytes

”fwupgrade”

String to enable upgrade

mode (not null terminated)

Table 3-13. Answer format

Field

Size

Value

Description

Answer ID

1 byte

CMD_FIRMWARE_UPGRADE

Answer id

Status

1 byte

STATUS_CMD_OK or

STATUS_CMD_FAILED

A status value indicating

the result of the operation

If the status returned is STATUS_CMD_OK, the AVRISP mkII will disconnect and

enter upgrade mode.

3.1.7 CMD_RESET_PROTECTION

This command resets the short circuit protection system after a short circuit state has

been returned by the PARAM_STATUS_TGT_CONN.

Table 3-14. Command format

Field

Size

Value

Description

Command ID

1 byte

CMD_RESET_PROTECTION

Command id

Table 3-15. Answer format

Field

Size

Value

Description

Answer ID

1 byte

CMD_RESET_PROTECTION

Answer id

Status

1 byte

STATUS_CMD_OK

This command will always

return STATUS_CMD_OK

3.2 ISP Programming Commands

These commands handles FLASH, EEPROM, fuse bytes, lock bits, signature and

oscillator calibration programming in ISP mode.

3.2.1 CMD_ENTER_PROGMODE_ISP

This command will make the target device enter programming mode.

Table 3-16. Command form

Field

Size

Value

Description