Alsig,
It looks like you have missed the fact that the two least
significant bits of the SPSR register are not defined and MUST be
masked before any tests of the register contents. In your main() code
you test the status for "MA_OK" as follows:
>if(spi1_get_status() == MA_OK)
instead of:
if((spi1_get_status()& 0xFC)== MA_OK)
On my test board SPI1 status returned was 0x02 and your _putch()
never had a chance to run.
I guess, if you really want the thing to work you'll need some way to
look into your micro, unless you have a looooot of time ;-).
Good luck,
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