Rainbow-electronics ATmega64C1 Manuel d'utilisateur télécharger pdf (Page 214)

214

7647A–AVR–02/08

ATmega32/64/M1/C1

17.5.7.3 Data Length in Rx Response

Figure 17-9. LIN2.1 - Rx Response - No error

• The user initializes LRXDL field before setting the Rx Response command,

• After setting the Rx Response command, LTXDL is reset by hardware,

• LRXDL field will remain unchanged during Rx (during busy signal),

• LTXDL field will count the number of received bytes (during busy signal),

• If an error occurs, Rx stops, the corresponding error flag is set and LTXDL will give the num-

ber of received bytes without error,

• If no error occurs, LRXOK is set after the reception of the CHECKSUM, LRXDL will be

unchanged (and LTXDL = LRXDL).

17.5.7.4 Data Length in Tx Response

Figure 17-10. LIN1.3 - Tx Response - No error

• The user initializes LTXDL field before setting the Tx Response command,

• After setting the Tx Response command, LRXDL is reset by hardware,

• LTXDL will remain unchanged during Tx (during busy signal),

• LRXDL will count the number of transmitted bytes (during busy signal),

• If an error occurs, Tx stops, the corresponding error flag is set and LRXDL will give the num-

ber of transmitted bytes without error,

• If no error occurs, LTXOK is set after the transmission of the CHECKSUM, LTXDL will be

unchanged (and LRXDL = LTXDL).

DATA-0 DATA-1 DATA-2 DATA-3 CHECKSUM

LINDLR=0x?4

LCMD2..0=000

LIN bus

LRXDL (*)

1?0

LBUSY

LTXDL (*)

234

Byte 2

Byte 3

Byte 4

Byte

LIDOK LRXOK

LCMD=Rx Response

(*) : LRXDL & LTXDL updated by user

DATA-0 DATA-1 DATA-2 DATA-3 CHECKSUM

LCMD2..0=000

LIN bus

LBUSY

Byte 2

Byte 3

Byte 4

Byte

LIDOK LTXOK

140

LRXDL (*)

234

LCMD=Tx Response

(*) : LRXDL & LTXDL updated by Rx Response or Tx Response task

LTXDL (*)

1 2 ... 209 210 211 212 213 214 215 216 217 218 219 ... 365 366

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