CAN/CANopen Compliant Bootloader for ST STR700

European customers must order from our European store at www.canopenstore.eu.

A bootloder that allows new firmware to be delivered via a CAN or CANopen network. Using any regular CANopen configuration tool, such as PCANopen Magic, a hex file can be programmed into the flash memory of a CAN or CANopen node.

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The main benefit of a CANopen compliant bootloader is that regular CANopen configuration tools can be used to perform the code download on PCs with CANbus interfaces as the in bootloader mode the device will still operate as a regular CANopen conformant device.

The bootloader implements a minimal node in a CANopen network as specified in the CiA Draft Standard Proposal 302: "Framework for Programmable CANopen Devices". It allows the use of regular CANopen master software or configuration tools which support domains, such as PCANopen Magic, to download new firmware into the user flash code memory.

This version of the CANopen bootloader is for the STR700 family from ST Semiconductors.

Object Dictionary

The following table lists the Object Dictionary entries implemented by the bootloader.

Index	Subindex	Datatype	Access	Description
1000H	00H	UNSIGNED32	RO	Device Type
1001H	00H	UNSIGNED8	RO	Error Register
1018H	00H	UNSIGNED8	RO	Number of Entries.
1018H	01H	UNSIGNED32	RO	Vendor ID
1018H	02H	UNSIGNED32	RO	Product Code
1F50H	00H	UNSIGNED8	RO	Number of Entries
1F50H	01H	DOMAIN	WO	Download Program
1F51H	00H	UNSIGNED8	RO	Number of Entries
1F51H	01H	UNSIGNED8	WO	Program Control

Once the bootloader has been activated (by writing to a specific Object Dictionary entry in your application), new firmware is written to entry 1F50H,01H. Once written, writing 01H to 1F51,01H will reset the device and the new application will start to execute.