SH7262 datasheet(33/45 Pages) RENESAS

33 / 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 33 of 45

3.15

Sample Program Listing "serial_flash.c" (12/19)

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

* ID

* Outline

: Execute command (No read data).

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

* Include

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

* Declaration

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

unsigned char *data,int data_sz)

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

* Description

: Executes the specified command.

: Transmits the argument ope, and then transmits the argument data.

: Discards the received data.

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

: Set one of the values between 0 and 256 in the data_sz.

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

* Argument

: unsigned char *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 char *data; I : Start address of the data block to transmit

: int data_sz

; I : Number of bytes in the data block

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

* Return Value : void

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

* Note

: None

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

static void io_cmd_exe(unsigned char *ope, int ope_sz, unsigned char *data, int data_sz)

{

unsigned char tmp;

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

RSPI0.SPBFCR.BYTE

= 0xC0u;

RSPI0.SPBFCR.BYTE

= 0x00u;

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

RSPI0.SPCR.BIT.SPE = 1;

/* ==== MOSI (command, address, write data) ==== */

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 */

}

SH7262 Datasheet(PDF) 33 Page - Renesas Technology Corp

SH7262 Datasheet(HTML) 33 Page - Renesas Technology Corp

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