Posted on November 08, 2007 at 06:54Hello all
im having a little bit of trouble with the bspi the clock works perfect and so does sending data but the slave select pin doesnt turn zero to select the device(only one device attached) ive tryed setting it manually but to no avail. please see code below
Code:
void InitaliseQTouch(void)
{
// P0.0 ''MISO''
// P0.1 ''MOSI''
// P0.2 ''SCLK''
// P0.3 ''SS''
//P2.9 ''DRDY''
//P2.10 ''CHANGE''
GPIO_Config (GPIO0,(1<<1)|(1<<2)|(1<<3), GPIO_AF_PP); // set up port pins.
GPIO_Config(GPIO2,(1<<9)|(1<<10),GPIO_IN_TRI_CMOS);//data ready and change pins
GPIO_Config(GPIO0,0,GPIO_IN_TRI_CMOS);//MISO
//GPIO_BitWrite(GPIO0,3,0x00);
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 , DISABLE);//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
{
BSPI_BufferSend (BSPI0,Buff1Out,3 );// this should send the words
BSPI_BufferReceive(BSPI0,Buff1In ,3 );// put the data recived into my buffer
}
}
}
