AT91RM3400-DK Atmel, AT91RM3400-DK Datasheet - Page 66
AT91RM3400-DK
Manufacturer Part Number
AT91RM3400-DK
Description
KIT DEV FOR AT91RM3400
Manufacturer
Atmel
Series
AT91SAM Smart ARMr
Type
MCUr
Datasheets
1.AT91RM3400-DK.pdf
(461 pages)
2.AT91RM3400-DK.pdf
(2 pages)
3.AT91RM3400-DK.pdf
(25 pages)
Specifications of AT91RM3400-DK
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT91RM3400
Data Bus Width
32 bit
Interface Type
RS-232, USB
For Use With/related Products
AT91RM3400
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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- Download datasheet (6Mb)
Description of the
SvcXmodem Structure
66
AT91RM3400
The SvcXmodem service is a reusable implementation of the Xmodem protocol. It supports
only the 128-byte packet format and provides read and write functions. The SvcXmodem
structure defines:
•
•
•
•
With this structure, the Xmodem protocol can be used with all media (USART, USB, etc.).
Only private methods may be overloaded to adapt the Xmodem protocol to a new media.
The default implementation of the Xmodem uses a USART to send and receive packets. Read
and write functions implement peripheral data controller facilities to reduce interrupt overhead.
It assumes the USART is initialized, the memory buffer allocated and the interrupts
programmed.
A periodic timer is required by the service to manage timeouts and the periodic transmission of
the character “C” (Refer to Xmodem protocol). This feature is provided by the Tempo Service.
The following structure defines the Xmodem Service:
a pointer to a handler initialized to readHandler or writeHandler
a pointer to a function that processes the xmodem packet crc
a pointer to a function that checks the packet header
a pointer to a function that checks data
typedef struct _AT91PS_SvcXmodem {
csr);
csr);
} AT91S_SvcXmodem, *AT91PS_SvcXmodem
// Public Methods:
AT91S_SvcCommStatus (*Handler) (struct _AT91PS_SvcXmodem *, unsigned int);
AT91S_SvcCommStatus (*StartTx) (struct _AT91PS_SvcXmodem *, unsigned int);
AT91S_SvcCommStatus (*StopTx)
// Private Methods:
AT91S_SvcCommStatus (*ReadHandler)
AT91S_SvcCommStatus (*WriteHandler) (struct _AT91PS_SvcXmodem *, unsigned int
unsigned short
char
char
AT91S_SvcComm
AT91PS_USART pUsart;
AT91S_SvcTempo tempo; // Link to a AT91S_Tempo object
char
unsigned int
char
unsigned char packetId;
char
char
char
*pData;
dataSize;
packetDesc[AT91C_XMODEM_PACKET_SIZE];
packetStatus;
isPacketDesc;
eot;
parent;
(*GetCrc)
(*CheckHeader)
(*CheckData)
// Base class
// end of transmition
(struct _AT91PS_SvcXmodem *, unsigned int);
// = XMODEM_DATA_STX or XMODEM_DATA_SOH
// Current packet
(struct _AT91PS_SvcXmodem *, unsigned int
(char *ptr, unsigned int count);
(unsigned char currentPacket, char *packet);
(struct _AT91PS_SvcXmodem *);
1790A–ATARM–11/03
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