LM3S818 Luminary Micro, Inc, LM3S818 Datasheet - Page 389
LM3S818
Manufacturer Part Number
LM3S818
Description
Lm3s818 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S818.pdf
(392 pages)
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22.3.5
22.3.6
February 6, 2007
automatically increment address and continue programming from the previous location. The caller
should limit transfers of data to a maximum 8 bytes of packet data to allow the flash to program
successfully and not overflow input buffers of the serial interfaces. The command terminates
programming once the number of bytes indicated by the COMMAND_DOWNLOAD command has
been received. Each time this function is called it should be followed by a
COMMAND_GET_STATUS to ensure that the data was successfully programmed into the flash. If
the flash loader sends a NAK to this command, the flash loader does not increment the current
address to allow retransmission of the previous data.
Byte[0] = 11
Byte[1] = checksum(Bytes[2:10])
Byte[2] = COMMAND_SEND_DATA
Byte[3] = Data[0]
Byte[4] = Data[1]
Byte[5] = Data[2]
Byte[6] = Data[3]
Byte[7] = Data[4]
Byte[8] = Data[5]
Byte[9] = Data[6]
Byte[10] = Data[7]
COMMAND_RUN (0x22)
This command is used to tell the flash loader to execute from the address passed as the
parameter in this command. This command consists of a single 32-bit value that is interpreted as
the address to execute. The 32-bit value is transmitted MSB first and the flash loader responds
with an ACK signal back to the host device before actually executing the code at the given
address. This allows the host to know that the command was received successfully and the code
is now running.
Byte[0] = 7
Byte[1] = checksum(Bytes[2:6])
Byte[2] = COMMAND_RUN
Byte[3] = Execute Address[31:24]
Byte[4] = Execute Address[23:16]
Byte[5] = Execute Address[15:8]
Byte[6] = Execute Address[7:0]
COMMAND_RESET (0x25)
This command is used to tell the flash loader device to reset. This is useful when downloading a
new image that overwrote the flash loader and wants to start from a full reset. Unlike the
COMMAND_RUN command, this allows the initial stack pointer to be read by the hardware and
set up for the new code. It can also be used to reset the flash loader if a critical error occurs and
the host device wants to restart communication with the flash loader.
Byte[0] = 3
Byte[1] = checksum(Byte[2])
Byte[2] = COMMAND_RESET
Preliminary
LM3S818 Data Sheet
389
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