SH7262 datasheet(34/45 Pages) RENESAS

34 / 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 34 of 45

3.16

Sample Program Listing "serial_flash.c" (13/19)

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while(data_sz--){

while( RSPI0.SPSR.BIT.SPTEF == 0 ){

/* wait */

}

RSPI0.SPDR.BYTE = *data++;

if( RSPI0.SPSR.BIT.SPRF == 1 ){

tmp = RSPI0.SPDR.BYTE; /* Dummy read to avoid an overflow of data */

}

io_wait_tx_end();

/* Waits for transfer end */

/* ---- SPI transfer end (SSL negation) ---- */

RSPI0.SPCR.BIT.SPE = 0;

}

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

* ID

* Outline

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

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

* Include

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

* Declaration

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

unsigned char *rd,

int rd_sz)

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

* Description

: Executes the specified command.

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

: Transfer data in unit of bytes.

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

: More than 0 can be set in the rd_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 *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(unsigned char *ope, int ope_sz, unsigned char *rd, int rd_sz)

{

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

RSPI0.SPBFCR.BYTE

= 0xC0u;

RSPI0.SPBFCR.BYTE

= 0x00u;

SH7262 Datasheet(PDF) 34 Page - Renesas Technology Corp

SH7262 Datasheet(HTML) 34 Page - Renesas Technology Corp

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