Alsig,
I'll try to build your application and check the configuration.
What tools do you use? Could you send me your lpc2114.h file?
If you can, put a break on " TurnOnLed();" and use your debugger
to check PCONP, PINSEL1 and SPI1_xxx register data. It looks like
your SPI1 may be disabled. Also your slave will need a select/enable
line active low to operate.
Krys
--- In lpc2000@yahoogroups.com, Jens Alsig <alsig@g...> wrote:
> Hi y4krys,
>
> I've checked and double checked my source code and I can't find any
> errors but it still doesn't work.
> The SPI pins seam to be set as input.
> I've included my source code and if you could take a look at it...
Thanks.
>
> Does anybody own a LPC with two SPI ports that would test the code
for me?
>
> Most of the code are generated by MakeApp from IAR.
>
> Thanks in advance
>
> Jens Alsig
>
> main.c
>
>
> #include "lpc2114.h"
>
> void init_spi(void);
> #define MA_PINSEL0_PCB 0x00000000 /* Pin Function Select
> Register 0 */
> #define MA_PINSEL0_PCB_MASK 0xFFFFFFFF /* Used bits */
> #define MA_PINSEL1_PCB 0x000002A8 /* Pin Function Select
> Register 1 */
> #define MA_PINSEL1_PCB_MASK 0x3FCFFFFF /* Used bits */
> #define MA_PINSEL2_PCB 0x006000F0 /* Pin Function Select
> Register 2 */
> #define MA_PINSEL2_PCB_MASK 0x0FF3E9FC /* Used bits */
>
>
> #define MA_S0SPCR_SPI 0x00000000 /* SPI0 Control Register
*/
> #define MA_S0SPCR_SPI_MASK 0x000000F8 /* Used bits */
> #define MA_S0SPDR_SPI 0x00000000 /* SPI0 Data Register */
> #define MA_S0SPDR_SPI_MASK 0x000000FF /* Used bits */
> #define MA_S0SPCCR_SPI 0x00000008 /* SPI0 Clock Counter
Register */
> #define MA_S0SPCCR_SPI_MASK 0x000000FF /* Used bits */
> #define MA_S1SPCR_SPI 0x00000020 /* SPI1 Control Register
*/
> #define MA_S1SPCR_SPI_MASK 0x000000F8 /* Used bits */
> #define MA_S1SPDR_SPI 0x00000000 /* SPI1 Data Register */
> #define MA_S1SPDR_SPI_MASK 0x000000FF /* Used bits */
> #define MA_S1SPCCR_SPI 0x00000008 /* SPI1 Clock Counter
Register */
> #define MA_S1SPCCR_SPI_MASK 0x000000FF /* Used bits */
>
>
> #define MA_OK 0
> #define MA_ERROR 1
> #define MA_EMPTY 2
> #define S1SPSR_SPIF (1 << 7)
> #define S1SPSR_WCOL (1 << 6)
> #define S1SPSR_ROVR (1 << 5)
> #define S1SPSR_MODF (1 << 4)
> #define S1SPSR_ABRT (1 << 3)
>
> #define PSelLED 0x30000000
> #define LED 0x40000000
>
> void TurnOnLed(void)
> {
> GPIO0_IOCLR = LED;
> }
>
> void TurnOffLed(void)
> {
> GPIO0_IOSET = LED;
> }
>
> void spi1_init( void )
> {
> PCB_PINSEL1 = ( PCB_PINSEL1 & ~MA_PINSEL1_PCB_MASK ) |
MA_PINSEL1_PCB;
> SPI1_SPCCR = ( SPI1_SPCCR & ~MA_S1SPCCR_SPI_MASK ) |
MA_S1SPCCR_SPI;
> SPI1_SPCR = ( SPI1_SPCR & ~MA_S1SPCR_SPI_MASK ) |
MA_S1SPCR_SPI;
> }
>
> signed char spi1_putch( unsigned char Data )
> {
> signed char Status;
> SPI1_SPDR = Data;
> Status = MA_OK;
>
>
> if( SPI1_SPSR )
> {
> Status = MA_ERROR;
> }
> return Status;
>
> }
>
> unsigned char spi1_getch( void )
> {
> unsigned char Data;
> Data = SPI1_SPDR;
> return Data;
>
> }
>
> signed char spi1_get_status( void )
> {
> signed char Status;
> Status = (signed char) SPI1_SPSR;
>
> if( Status == 0 )
> {
> Status = MA_EMPTY;
> }
> else if( Status & ( S1SPSR_WCOL | S1SPSR_ROVR | S1SPSR_MODF |
> S1SPSR_ABRT ) )
> {
> if( Status & S1SPSR_MODF )
> {
> SPI1_SPCR = MA_S1SPCR_SPI;
> }
> }
> else if( Status & S1SPSR_SPIF )
> {
> Status = MA_OK;
> }
> return Status;
>
> }
>
>
> int main(void)
> {
> GPIO0_IODIR = LED;
> spi1_init();
> TurnOnLed();
> while(1)
> {
> if(spi1_get_status() == MA_OK)
> {
> if(spi1_putch(0xAA) == MA_ERROR)
> TurnOffLed();
> }
> }
> }
>
>
>
> y4krys wrote:
>
> > Alsig,
> > One more thing, for the SSEL pullup to work the pin function must
be
> > set to SPI (PINSEL1 |= 0x2A8). (Note: corrected the config
bits ;-))
> > Krys
> >
> > --- In lpc2000@yahoogroups.com, "y4krys" <krys.brukalo@a...>
wrote:
> > > Alsig,
> > > If you write a byte to the transmit register the SCK clock
should
> > be
> > > generated. Make sure the SPI1 peripheral is enabled and powered
> > > (Check PCONP bits). You should be able to do your initial test
> > using
> > > your debugger and the direct access to the control registers.
> > Also,
> > > only the MISO pin should show as an input, MOSI and SCK should
be
> > > outputs driven SPI. Once you are past the clock and MOSI hurdle
> > > you'll need the slave select signal from your LPC to the EE and
the
> > > right SPI mode (CPOL and CPHA) for proper data access.
> > > I hope it helps.
> > > Regards,
> > > Krys
> > > --- In lpc2000@yahoogroups.com, Jens Alsig <alsig@g...> wrote:
> > > > Hi,
> > > > The all pins seam to float or be as input even after I
configure
> > > the
> > > > PINSEL1 register. I'm using a LPC2214 as
> > > > the master and the 25Lc640 as a slave. I've connected the
SSEL to
> > 3
> > > volt.
> > > > Regarding the setup of the registers I've tried the IAR
MakeApp
> > > code for
> > > > the PCB module and the SPI module. And at the
> > > > moment this gives the same result.
> > > >
> > > > Regards Jens Alsig
> > > >
> > > >
> > > > y4krys wrote:
> > > >
> > > > > --- In lpc2000@yahoogroups.com, "jensalsig" <alsig@g...>
wrote:
> > > > > > Hi,
> > > > > >
> > > > > > have anyone every used the SPI 1 channel on a LPC device
that
> > > has 2
> > > > > > channels?
> > > > > >
> > > > > > I've tried without any luck and getting very frustrated! I
> > have
> > > tried
> > > > > > using the IAR MakeApp and that doesn't work either. My
setup
> > is
> > > a
> > > > > > LPC2214 from Olimex and a MicroChip EEPROM.
> > > > > >
> > > > > > Any suggestions are VERY welcome.
> > > > > >
> > > > > > Regards Jens Alsig
> > > > >
> > > > > Hi Alsig,
> > > > > What do you mean by "doesn't work"? Is SPI1 properly setup
(IO
> > > pin
> > > > > selection and function, Master/Slave etc.) and enabled?
Have
> > you
> > > > > checked the bus with a scope? What hardware do you use?
> > > > >
> > > > > Krys
> > > > >
> > > > >
> > > > >
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Re: SPI1
2005-08-17 by y4krys