Commands; Firmware Interface Protocol; Synchronization Sequence; Data Frame - Texas Instruments MSP430 User Manual

Commands

3.1 Commands
The MSP-GANG430 can be controlled via firmware commands received through its RS-232 serial port.
The following firmware commands are supported:
• Load Parameters
• Start
• Transmit Diagnostics
• Erase Image
• Load Image Block
• Load Image Checksum
• Erase Firmware
• Load Firmware Block
• Finalize Firmware
• Select Baud Rate
• Execute Self Test
• Set Signals (at target connector)
• Read Target Selective
• Write Target Selective
• Set Target V
CC
• Select Image
3.2

Firmware Interface Protocol

The MSP-GANG430 supports the following UART communication protocol:
• Baud rates from 9600 to 115200 baud in half duplex mode. The default baud rate at startup is 115200
baud, and is the recommended baud rate.
• One start bit, eight data bits, even parity bit, and one stop bit
• Software handshake by (not)acknowledge character
3.3

Synchronization Sequence

To synchronize with the MSP-GANG430, the host serial handler transmits a SYNC character (0x80) to the
MSP-GANG430. The MSP-GANG430 acknowledges successful reception of the SYNC by responding
with a DATA_ACK character (0x90). If the SYNC is not received correctly, a DATA_NAK character (0xA0)
is sent back. This sequence is required to establish the communication channel and/or react immediately
to line faults.
NOTE: The synchronization character is not part of the data frame described in
3.4

Data Frame

The data frame format follows the TI MSP430 serial standard protocol (SSP) rules, extended with a
preceding synchronization sequence (SS), as described in
the receiver in Table
The redundancy of some parameters results from the adaptation of the SSP or to save boot ROM space.
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Firmware
3-1.
Copyright © 2003–2010, Texas Instruments Incorporated
Section
Section 3.3. The MSP-GANG430 is considered
SLAU101O – March 2003 – Revised May 2010
www.ti.com
3.4.