Flashloader Packet Types; Ping Packet - NXP Semiconductors freescale KV4 Series Reference Manual

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Functional Description

• Data phases may be aborted by the host sending the final

Generic Response early with a status of

kStatus_AbortDataPhase. The sending side may abort the

data phase early by sending a zero-length data packet.

• The final Generic Response packet sent after the data

phase includes the status for the entire operation.

14.2.5 Flashloader Packet Types

The Kinetis Flashloader device works in slave mode. All data communication is initiated

by a host, which is either a PC or an embedded host. The Kinetis Flashloader device is

the target, which receives a command or data packet. All data communication between

host and target is packetized.

The term "target" refers to the "Kinetis Flashloader device."

There are 6 types of packets used in the device:

• Ping Response packet

• Framing packet

• Command packet

• Data packet

• Response packet

All fields in the packets are in little-endian byte order.

14.2.5.1 Ping packet

The Ping packet is the first packet sent from a host to the target (Kinetis Flashloader), to

establish a connection on a selected peripheral. For a UART peripheral, the Ping packet is

used to determine the baudrate. A Ping packet must be sent before any other

communications. In response to a Ping packet, the target sends a Ping Response packet.

Table 14-2. Ping Packet Format

KV4x Reference Manual, Rev. 2, 02/2015

Freescale Semiconductor, Inc.