at91_spi.c File Reference

Go to the source code of this file.

Functions

int At91Spi0Init (void)
 Initialize the first serial peripheral interface on the AT91 MCU.
int At91Spi0InitChipSelects (unsigned int mask)
 Initialize specified SPI0 chip selects on the AT91 MCU.
int At91Spi0Enable (void)
 Initialize the second serial peripheral interface on the AT91 MCU.
int At91SpiInit (unsigned int base)
 Initialize serial peripheral interface on the AT91 MCU.
int At91SpiEnable (unsigned int base)
int At91SpiDisable (unsigned int base)
int At91SpiReset (unsigned int base)
 Reset serial peripheral interface on the AT91 MCU.
int At91SpiInitChipSelects (unsigned int base, unsigned int mask)
 Initialize specified SPI chip selects on the AT91 MCU.
int At91SpiSetRate (unsigned int base, unsigned int cs, uint32_t rate)
 Configure the SPI rate.
uint32_t At91SpiGetModeFlags (unsigned int base, unsigned int cs)
int At91SpiSetModeFlags (unsigned int base, unsigned int cs, uint32_t mode)
 Configure the SPI operation mode.
unsigned int At91SpiGetBits (unsigned int base, unsigned int cs)
int At91SpiSetBits (unsigned int base, unsigned int cs, unsigned int bits)
unsigned int At91SpiGetSckDelay (unsigned int base, unsigned int cs)
int At91SpiSetSckDelay (unsigned int base, unsigned int cs, unsigned int dly)
unsigned int At91SpiGetTxDelay (unsigned int base, unsigned int cs)
int At91SpiSetTxDelay (unsigned int base, unsigned int cs, unsigned int dly)
unsigned int At91SpiGetCsDelay (unsigned int base)
int At91SpiSetCsDelay (unsigned int base, unsigned int dly)
int At91SpiTransfer2 (unsigned int base, unsigned int cs, CONST void *txbuf, void *rxbuf, int xlen, CONST void *txnbuf, void *rxnbuf, int xnlen)
 Transfer two SPI buffers.


Function Documentation

int At91Spi0Init ( void   ) 

Initialize the first serial peripheral interface on the AT91 MCU.

Definition at line 96 of file at91_spi.c.

References _BV, At91Spi0Enable(), At91SpiReset(), NutIrqEnable(), NutRegisterIrqHandler(), outr, PMC_PCER, sig_SPI0, SPI0_BASE, and SPI0_ID.

int At91Spi0InitChipSelects ( unsigned int  mask  ) 

Initialize specified SPI0 chip selects on the AT91 MCU.

Parameters:
mask Chip selects to use. Set bit 0 for NPCS0, bit 1 for NPCS1 and so on.
Returns:
0 on success or -1 if any of the specified chip selects is not available.

Definition at line 119 of file at91_spi.c.

References _BV, outr, PIO_PDR_OFF, SPI0_CS0_PIN, SPI0_CS0_PIO_BASE, SPI0_CS0_PSR_OFF, SPI0_CS1_PIN, SPI0_CS1_PIO_BASE, SPI0_CS1_PSR_OFF, SPI0_CS2_PIN, SPI0_CS2_PIO_BASE, SPI0_CS2_PSR_OFF, SPI0_CS3_PIN, SPI0_CS3_PIO_BASE, and SPI0_CS3_PSR_OFF.

int At91Spi0Enable ( void   ) 

Initialize the second serial peripheral interface on the AT91 MCU.

Definition at line 155 of file at91_spi.c.

References outr, PIO_PDR_OFF, SPI0_PINS, SPI0_PIO_BASE, and SPI0_PSR_OFF.

int At91SpiInit ( unsigned int  base  ) 

Initialize serial peripheral interface on the AT91 MCU.

Parameters:
base Interface base address, either SPI_BASE, SPI0_BASE or SPI1_BASE.
Returns:
0 on success or -1 if SPI is not available.

Definition at line 257 of file at91_spi.c.

References At91Spi0Init(), SPI0_BASE, and SPI1_BASE.

int At91SpiEnable ( unsigned int  base  ) 

Definition at line 275 of file at91_spi.c.

References outr, SPI_CR_OFF, and SPI_SPIEN.

Referenced by At91SpiReset().

int At91SpiDisable ( unsigned int  base  ) 

Definition at line 282 of file at91_spi.c.

References outr, SPI_CR_OFF, and SPI_SPIDIS.

Referenced by At91SpiReset().

int At91SpiReset ( unsigned int  base  ) 

Reset serial peripheral interface on the AT91 MCU.

Parameters:
base Interface base address, either SPI_BASE, SPI0_BASE or SPI1_BASE.
Returns:
0 on success or -1 if SPI is not available.

Definition at line 297 of file at91_spi.c.

References At91SpiDisable(), At91SpiEnable(), outr, SPI_CR_OFF, SPI_DLYBCS_LSB, SPI_MODFDIS, SPI_MR_OFF, SPI_MSTR, SPI_PCS, and SPI_SWRST.

int At91SpiInitChipSelects ( unsigned int  base,
unsigned int  mask 
)

Initialize specified SPI chip selects on the AT91 MCU.

Parameters:
base Interface base address, either SPI_BASE, SPI0_BASE or SPI1_BASE.
mask Chip selects to use. Set bit 0 for NPCS0, bit 1 for NPCS1 and so on.
Returns:
0 on success or -1 if any of the specified chip selects is not available.

Definition at line 327 of file at91_spi.c.

References At91Spi0InitChipSelects(), SPI0_BASE, and SPI1_BASE.

int At91SpiSetRate ( unsigned int  base,
unsigned int  cs,
uint32_t  rate 
)

Configure the SPI rate.

Parameters:
base SPI register base.
cs Chip select line.
rate Baudrate. The maximum is MCK/1 and the minimum is MCK/255. If the specified rate is above the maximum or below the minimum, the maximum or minimum value resp. will be set.

Definition at line 353 of file at91_spi.c.

References inr, outr, SPI_CSR0_OFF, SPI_CSR1_OFF, SPI_CSR2_OFF, SPI_CSR3_OFF, SPI_SCBR, and SPI_SCBR_LSB.

uint32_t At91SpiGetModeFlags ( unsigned int  base,
unsigned int  cs 
)

Definition at line 391 of file at91_spi.c.

References inr, SPI_CPOL, SPI_CSR0_OFF, SPI_LLB, SPI_MODFDIS, SPI_MR_OFF, SPI_MSTR, SPI_NCPHA, SPI_PCSDEC, SPIMF_CAPRISE, SPIMF_LOOPBACK, SPIMF_MASTER, SPIMF_MFDETECT, and SPIMF_SCKIAHI.

int At91SpiSetModeFlags ( unsigned int  base,
unsigned int  cs,
uint32_t  mode 
)

Configure the SPI operation mode.

Parameters:
base SPI register base.
cs Chip select line.
mode Any of the following
  • SPIMF_MASTER Master mode.
  • SPIMF_PCSDEC Decoded chip selects.
  • SPIMF_MFDETECT Mode fault detection.
  • SPIMF_LOOPBACK Loopback mode.
  • SPIMF_SCKIAHI Clock is high when inactive.
  • SPIMF_CAPRISE Data cpatured on rising edge.
  • SPIMF_KEEPCS Chip select remains active after transfer.

Definition at line 436 of file at91_spi.c.

References At91SpiGetModeFlags(), inr, outr, SPI_CPOL, SPI_CSAAT, SPI_CSR0_OFF, SPI_LLB, SPI_MODFDIS, SPI_MR_OFF, SPI_MSTR, SPI_NCPHA, SPI_PCSDEC, SPIMF_CAPRISE, SPIMF_KEEPCS, SPIMF_LOOPBACK, SPIMF_MASTER, SPIMF_MFDETECT, SPIMF_PCSDEC, and SPIMF_SCKIAHI.

unsigned int At91SpiGetBits ( unsigned int  base,
unsigned int  cs 
)

Definition at line 478 of file at91_spi.c.

References inr, SPI_BITS, SPI_BITS_10, SPI_BITS_11, SPI_BITS_12, SPI_BITS_13, SPI_BITS_14, SPI_BITS_15, SPI_BITS_16, SPI_BITS_9, and SPI_CSR0_OFF.

int At91SpiSetBits ( unsigned int  base,
unsigned int  cs,
unsigned int  bits 
)

Definition at line 514 of file at91_spi.c.

References At91SpiGetBits(), inr, outr, SPI_BITS, SPI_BITS_10, SPI_BITS_11, SPI_BITS_12, SPI_BITS_13, SPI_BITS_14, SPI_BITS_15, SPI_BITS_16, SPI_BITS_8, SPI_BITS_9, and SPI_CSR0_OFF.

unsigned int At91SpiGetSckDelay ( unsigned int  base,
unsigned int  cs 
)

Definition at line 556 of file at91_spi.c.

References inr, SPI_CSR0_OFF, and SPI_DLYBS_LSB.

int At91SpiSetSckDelay ( unsigned int  base,
unsigned int  cs,
unsigned int  dly 
)

Definition at line 561 of file at91_spi.c.

References At91SpiGetSckDelay(), inr, outr, SPI_CSR0_OFF, SPI_DLYBS, and SPI_DLYBS_LSB.

unsigned int At91SpiGetTxDelay ( unsigned int  base,
unsigned int  cs 
)

Definition at line 573 of file at91_spi.c.

References inr, SPI_CSR0_OFF, and SPI_DLYBCT_LSB.

int At91SpiSetTxDelay ( unsigned int  base,
unsigned int  cs,
unsigned int  dly 
)

Definition at line 578 of file at91_spi.c.

References At91SpiGetTxDelay(), inr, outr, SPI_CSR0_OFF, SPI_DLYBCT, and SPI_DLYBCT_LSB.

unsigned int At91SpiGetCsDelay ( unsigned int  base  ) 

Definition at line 590 of file at91_spi.c.

References inr, SPI_DLYBCS_LSB, and SPI_MR_OFF.

int At91SpiSetCsDelay ( unsigned int  base,
unsigned int  dly 
)

Definition at line 595 of file at91_spi.c.

References At91SpiGetCsDelay(), inr, outr, SPI_DLYBCS, SPI_DLYBCS_LSB, and SPI_MR_OFF.

int At91SpiTransfer2 ( unsigned int  base,
unsigned int  cs,
CONST void *  txbuf,
void *  rxbuf,
int  xlen,
CONST void *  txnbuf,
void *  rxnbuf,
int  xnlen 
)

Transfer two SPI buffers.

Parameters:
base SPI port base address.
cs SPI device chip select.
txbuf First transmit buffer.
rxbuf First receive buffer.
xlen Length of first transfer.
txnbuf Second transmit buffer.
rxnbuf Second receive buffer.
xnlen Length of second transfer.

Definition at line 617 of file at91_spi.c.

References inr, NutEventWait(), outr, PDC_RXTDIS, PDC_RXTEN, PDC_TXTDIS, PDC_TXTEN, PERIPH_PTCR_OFF, PERIPH_RCR_OFF, PERIPH_RNCR_OFF, PERIPH_RNPR_OFF, PERIPH_RPR_OFF, PERIPH_TCR_OFF, PERIPH_TNCR_OFF, PERIPH_TNPR_OFF, PERIPH_TPR_OFF, SPI0_BASE, SPI1_BASE, SPI_IDR_OFF, SPI_IER_OFF, SPI_MR_OFF, SPI_PCS, SPI_PCS_0, SPI_PCS_1, SPI_PCS_2, SPI_PCS_3, SPI_RXBUFF, and SPI_SR_OFF.


© 2000-2007 by egnite Software GmbH - visit http://www.ethernut.de/