hi friendz....
i am interfacing a SD/MMC card to LPC2148 using SSP (SPI1) but and i am interfacing it on stadalone basis i.e.with no operating sys base... has anyone worked on it ?
i am not getting clock after initalising SPI_init routeen is

unsigned char i, Dummy;

*S1SPCR1 = 0x00; /* SSP master (off) in normal mode */
*PINSEL1 = *PINSEL1 & 0XFFFFFF03;
*PINSEL1 = *PINSEL1 | 0x000000A8;//0X01000000;
*IODIR0 = SPI_SEL; /* SSEL is output 0x00100000*/
*IOSET0 = SPI_SEL; /* set SSEL to high0x00100000 */
*VPBDIV = 0x00; /* Set PCLK 1/4 of CCLK */
/* Set data to 8-bit, Frame format SPI, CPOL = 0, CPHA = 0,
and SCR is 15 */
*S1SPCR = 0x0707;
/* SSPCPSR clock prescale register, master mode, minimum divisor
is 0x02*/
*SSPCPSR = 0x2;
/* Device select as master, SSP Enabled, normal operational mode */
*S1SPCR = 0x02;
for ( i = 0; i < 8; i++ )
{
Dummy = *S1SPDR; /* clear the RxFIFO */
}

----- Original Message ----
From: gamerz267
To: A...@yahoogroups.com
Sent: Monday, 7 April, 2008 8:54:10 AM
Subject: [AT91SAM] Re: spi pdc aic interupt

Im interfacing with ADC and DACs its working now

i configure the interuppt first like this
/*3. Configure interrupt for SPI0 in AIC*/
// Disable the interrupt first
AT91C_BASE_AIC- >AIC_IDCR = (1 << AT91C_ID_SPI0) ;

// Configure mode and handler
// For SPI
AT91C_BASE_AIC- >AIC_SMR[ AT91C_ID_ SPI0] = ((unsigned int)
(AT91C_AIC_PRIOR_ HIGHEST | AT91C_AIC_SRCTYPE_ INT_HIGH_ LEVEL));

AT91C_BASE_AIC- >AIC_SVR[ AT91C_ID_ SPI0] = ((unsigned int)
SPI0_Handler) ;

then i configure the spi
then enable the interupt
// Configure interrupt enable register
// Enables one or more interrupt sources of a SPI0
AT91C_BASE_SPI0- >SPI_IER = AT91C_SPI_ENDTX;
// Enable the interrupt on the interrupt controller
//AT91C_BASE_ AIC->AIC_ IECR = ((unsigned int) 1 << AT91C_ID_SPI0) ;

// Enables a SPI peripheral
// Enables the transmitter of a SPI0
AT91C_BASE_SPI0- >SPI_CR = AT91C_SPI_SPIEN;

--- In AT91SAM@yahoogroups .com, "hudson_low" wrote:
>
> Hi gamerz,
>
> I wondering what device u interface with using SPI?
> Do u need pull-Up on PA16_SPI0_MISO?
>
> Have u got it working Yet?
> Mind the to share the working code?
> I need some help getting my spi ISR right as well
>
> regards
> HS
>
> --- In AT91SAM@yahoogroups .com, "gamerz267" wrote:
> >
> > is there some special trick to get the interrupt working with spi. My
> > code doesnt cause a interupt. Am i doing something wrong??
> >
> >
> >
> > AT91F_PMC_EnablePer iphClock(
> > AT91C_BASE_PMC, // PIO controller base address
> > ((unsigned int) 1 << AT91C_ID_SPI0) );
> >
> > // Open PIO for SPI0
> > //AT91F_SPI0_ CfgPIO();
> > AT91F_PIO_CfgPeriph (
> > AT91C_BASE_PIOA, // PIO controller base address
> > ((unsigned int) AT91C_PA15_SPI0_ NPCS3) |
> > ((unsigned int) AT91C_PA16_SPI0_ MISO) |
> > ((unsigned int) AT91C_PA17_SPI0_ MOSI) |
> > ((unsigned int) AT91C_PA18_SPI0_ SPCK), // Peripheral A
> > 0); // Peripheral B
> >
> > /*2. Configure interrupt for SPI0 in AIC*/
> > //AT91F_AIC_ DisableIt( AT91C_BASE_ AIC, AT91C_ID_SPI0) ;
> > // Configure the AIC for SPI interrupts
> > AT91F_AIC_Configure It(
> > AT91C_BASE_AIC,
> > AT91C_ID_SPI0,
> > AT91C_AIC_PRIOR_ HIGHEST,
> > AT91C_AIC_SRCTYPE_ HIGH_LEVEL,
> > AT91F_SPI0_Interrup t_handler) ;
> > // Enable the interrupt on the interrupt controller
> > AT91F_AIC_EnableIt( AT91C_BASE_ AIC, AT91C_ID_SPI0) ;
> >
> >
> > /*3. Configuration SPI*/
> > // Reset SPI
> > //AT91F_SPI_ Reset(AT91C_ BASE_SPI0) ;
> >
> > // Configure SPI in Master Mode with with cs
> > AT91F_SPI_CfgMode( AT91C_BASE_ SPI0, SPI_MODE);
> >
> > // Configure CSx
> > AT91F_SPI_CfgCs( AT91C_BASE_ SPI0, 3, SPI_NPCS3_CONFIG) ; //CS3
> >
> > // Configure interupt when End of Transfer
> > AT91F_SPI_EnableIt( AT91C_BASE_ SPI0, AT91C_SPI_TDRE) ;
> >
> > // SPI_Enable
> > AT91F_SPI_Enable( AT91C_BASE_ SPI0);
> >
> > --- In AT91SAM@yahoogroups .com, "gamerz267" wrote:
> > >
> > > ok the clock was already enabled. Do i have to enable it for the aic
> > too?
> > > If so how do i do that?
> > >
> > >
> > > --- In AT91SAM@yahoogroups .com, "Eric Pasquier" wrote:
> > > >
> > > > Yes.
> > > > You have to set the internal MCK clock for each peripheral,
> > > disconnected by default for lower consumption.
> > > >
> > > > And, of course, you have to set others parmeters like number of
> > > bits, transfer rate, ... depending of your application.
> > > >
> > > > Eric Pasquier
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: gamerz267
> > > > To: AT91SAM@yahoogroups .com
> > > > Sent: Thursday, January 24, 2008 11:24 PM
> > > > Subject: [AT91SAM] Re: spi pdc aic interupt
> > > >
> > > >
> > > > Do you mean this
> > > >
> > > > AT91F_PMC_EnablePer iphClock(
> > > > AT91C_BASE_PMC, // PIO controller base address
> > > > ((unsigned int) 1 << AT91C_ID_SPI0) );
> > > >
> > > > // from lib_AT91SAM7X256. h
> > > > void AT91F_PMC_EnablePer iphClock (
> > > > AT91PS_PMC pPMC, // \arg pointer to PMC controller
> > > > unsigned int periphIds) // \arg IDs of peripherals
> > > > {
> > > > pPMC->PMC_PCER = periphIds;
> > > > }
> > > >
> > > > --- In AT91SAM@yahoogroups .com, "Eric Pasquier"
> wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > Did you set the peripheral clock (PMC_PCER) ?
> > > > >
> > > > > Eric.
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: gamerz267
> > > > > To: AT91SAM@yahoogroups .com
> > > > > Sent: Thursday, January 24, 2008 3:28 AM
> > > > > Subject: [AT91SAM] spi pdc aic interupt
> > > > >
> > > > >
> > > > > i need some help with using aic with pdc. How do you initiate
> > > it. This
> > > > > is how i set it up.
> > > > >
> > > > > // Configure interupt when End of Transfer
> > > > > AT91F_SPI_EnableIt( pSPI, AT91C_SPI_ENDTX) ;
> > > > >
> > > > > // Configure the AIC for SPI interrupts
> > > > > AT91F_AIC_Configure It(AT91C_ BASE_AIC, AT91C_ID_SPI0,
> > > > > AT91C_AIC_PRIOR_ HIGHEST, AT91C_AIC_SRCTYPE_ INT_HIGH_ LEVEL,
> > > > SPI0_Handler) ;
> > > > >
> > > > > // Enable the interrupt on the interrupt controller
> > > > > AT91F_AIC_EnableIt( AT91C_BASE_ AIC, AT91C_ID_SPI0) ;
> > > > >
> > > >
> > >
>







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