Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet
Product codes
AT91SAM9M10-G45-EK
64
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
–
Address
: Address in hexadecimal
–
Output
: The byte, halfword or word read in hexadecimal following by ‘>’
• Send a file (
S
): Send a file to a specified address
–
Address
: Address in hexadecimal
–
Output
: ‘>’.
Note:
There is a time-out on this command which is reached when the prompt ‘>’ appears before the end of the command
execution.
execution.
• Receive a file (
R
): Receive data into a file from a specified address
–
Address
: Address in hexadecimal
–
NbOfBytes
: Number of bytes in hexadecimal to receive
–
Output
: ‘>’
• Go (
G
): Jump to a specified address and execute the code
–
Address
: Address to jump in hexadecimal
–
Output
: ‘>’once returned from the program execution. If the executed program does not handle the link
register at its entry and does not return, the prompt will not be displayed.
• Get Version (
V
): Return the Boot Program version
–
Output
: version, date and time of ROM code followed by the prompt: ‘>’.
11.5.2
DBGU Serial Port
Communication is performed through the DBGU serial port initialized to 115200 Baud, 8 bits of data, no parity, 1
stop bit.
stop bit.
11.5.2.1
Supported External Crystal/External Clocks
The SAM-BA Monitor supports a frequency of 12 MHz to allow DBGU communication for both external crystal and
external clock.
external clock.
11.5.2.2
Xmodem Protocol
The Send and Receive File commands use the Xmodem protocol to communicate. Any terminal performing this
protocol can be used to send the application file to the target. The size of the binary file to send depends on the
SRAM size embedded in the product. In all cases, the size of the binary file must be lower than the SRAM size
because the Xmodem protocol requires some SRAM memory in order to work.
protocol can be used to send the application file to the target. The size of the binary file to send depends on the
SRAM size embedded in the product. In all cases, the size of the binary file must be lower than the SRAM size
because the Xmodem protocol requires some SRAM memory in order to work.
The Xmodem protocol supported is the 128-byte length block. This protocol uses a two-character CRC-16 to guar-
antee detection of a maximum bit error.
antee detection of a maximum bit error.
Xmodem protocol with CRC is accurate provided both sender and receiver report successful transmission. Each
block of the transfer looks like:
block of the transfer looks like:
<SOH><blk #><255-blk #><--128 data bytes--><checksum> in which:
– <SOH> = 01 hex
– <blk #> = binary number, starts at 01, increments by 1, and wraps 0FFH to 00H (not to 01)
– <255-blk #> = 1’s complement of the blk#.
– <checksum> = 2 bytes CRC16
shows a transmission using this protocol.