SH7262 datasheet(36/45 Pages) RENESAS

36 / 45 page

SH7262/SH7264 Group

High-speed Read/Write Serial Flash Memory

Using the Renesas Serial Peripheral Interface

REJ06B0889-0100/Rev.1.00

June 2009

Page 36 of 45

3.18

Sample Program Listing "serial_flash.c" (15/19)

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

/*""FUNC COMMENT""**************************************************************

* ID

* Outline

: Execute command (With read data, longword transfer).

*------------------------------------------------------------------------------

* Include

*------------------------------------------------------------------------------

* Declaration

: static void io_cmd_exe_rdmode_cpu_l(unsigned char *ope, int ope_sz,

unsigned long *rd,

int rd_sz);

*------------------------------------------------------------------------------

* Description

: Executes the specified command.

: Transmits the argument ope, and then receives data in the argument rd.

: Transfer the read data in units of longword.

: Set one of the values between 0 and 8 in the ope_sz.

: Although more than 0 can be set in the rd_sz, set the value

: in multiples of 4.

*------------------------------------------------------------------------------

* Argument

: unsigned long *ope ; I : Start address of the opcode block and

address block to transmit

: int ope_sz

; I : Number of bytes in the opcode block and

: address block

: unsigned long *rd

; I : Buffer address to store the received data

: int rd_sz

; I : Number of bytes in the data block

*------------------------------------------------------------------------------

* Return Value : void

*------------------------------------------------------------------------------

* Note

: None

*""FUNC COMMENT END""**********************************************************/

static void io_cmd_exe_rdmode_cpu_l(unsigned char *ope, int ope_sz, unsigned long *rd, int

rd_sz)

{

/* ==== Resets buffer ==== */

RSPI0.SPBFCR.BYTE

= 0xC0u;

RSPI0.SPBFCR.BYTE

= 0x00u;

/* ---- Enables the SPI transfer ---- */

RSPI0.SPCR.BIT.SPE = 1;

/* ---- MOSI (command, address, dummy) ---- */

RSPI0.SPCMD0.BIT.CPOL= 1;

/* RSPCK when idling is 1 */

RSPI0.SPCMD0.BIT.CPHA= 0;

/* Outputs data on even (rising) edge */

while(ope_sz--){

RSPI0.SPDR.BYTE = *ope++;

/* Command size must be equal or less than 8 bytes */

}

io_wait_tx_end();

/* Waits for transfer end */

SH7262 Datasheet(PDF) 36 Page - Renesas Technology Corp

SH7262 Datasheet(HTML) 36 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL