New trouble with slave pin (BSPI)

[noz4r2]

Posted on December 04, 2007 at 07:17

New trouble with slave pin (BSPI)

[noz4r2]

Posted on November 08, 2007 at 13:14

Ok i had everything working except the slave select which i have now learnt doesnt work when the st710 as master , so i swapped the slave wire to port 0 pin 12 and then fed the SS pin (port 0 pin 3) with the +3V found on the board with a 10k resistor. But now nothing works and was wondering if anyone could help me. please see my code below which was working before i swapped the slave wire.

Code:

void InitaliseQTouch(void)

{

// P0.0 ''MISO''

// P0.1 ''MOSI''

// P0.2 ''SCLK''

// P0.3 ''Old SS''

// P2.9 ''DRDY''

// P2.10 ''CHANGE''

// P0.12 ''SS''

GPIO_Config (GPIO0,(1<<1)|(1<<2)|(1<<12), GPIO_AF_PP); // set up port pins.

GPIO_Config(GPIO0,(1<<3),GPIO_IN_TRI_CMOS);//Old SS

GPIO_Config(GPIO0,0,GPIO_IN_TRI_CMOS);//MISO

BSPI_BSPI0Conf ( ENABLE );

BSPI_Init ( BSPI0 );

BSPI_ClockDividerConfig( BSPI0 ,230 );// this gives a 20 micro wave.10 up 10 down

BSPI_Enable ( BSPI0 , ENABLE);

BSPI_MasterEnable ( BSPI0 , ENABLE);

BSPI_ClkActiveHigh ( BSPI0 ,ENABLE);//this should make it idle high

BSPI_ClkFEdge ( BSPI0 ,DISABLE); //dont get data on first clock edge

BSPI_8bLEn ( BSPI0 , ENABLE); //allow 8 bit words

// BSPI_FifoDisable ( BSPI0 );

BSPI_RcFifoDepth ( BSPI0 , 3 ); // 3 Words Recived

BSPI_TrFifoDepth ( BSPI0 , 3 ); // 3 Words Transmit

}

void UseQ(void) {

if(GPIO_BitRead(GPIO2, 0x0A)==1)//if change

{

if(GPIO_BitRead(GPIO2, 0x09)==1)//if data ready

{

GPIO_BitWrite(GPIO0,12,0x00);

BSPI_BufferSend (BSPI0,Buff1Out,3 );// this should send the words

BSPI_BufferReceive(BSPI0,Buff1In ,3 );// put the data recived into my buffer

GPIO_BitWrite(GPIO0,12,0x01);

}

}

}

[kaouther]

Posted on December 03, 2007 at 13:42

Dear noz4r2,

A helpfull example of BSPI basic configuration in Master and slave mode is available in the

http://www.st.com/mcu/download2.php?file=str71xfwlib.zip&info=STR7 Software STR71x&url=http://www.st.com/stonline/products/support/micro/files/str71xfwlib.zip

V4.0. New example for BSPI using interrupt is added as well. Please refer to readme.txt file for the hardware connectivity.

Enjoy ;)

[ This message was edited by: coucou on 03-12-2007 18:54 ]

[basvandijk86]

Posted on December 04, 2007 at 07:17

Is there also an example available for the STR73x?

i found two examples but those are maybe a little bit to expanded for my purpose. I will look for a bit easier solution, someone?

[ This message was edited by: basvandijk86 on 04-12-2007 11:53 ]