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Functions | |
int | GpioSpiBus0Transfer (NUTSPINODE *node, CONST void *txbuf, void *rxbuf, int xlen) |
Transfer data on the SPI bus. | |
int | GpioSpiBus0NodeInit (NUTSPINODE *node) |
Initialize an SPI bus node. | |
int | GpioSpiBus0Select (NUTSPINODE *node, uint32_t tmo) |
Select a device on the SPI bus. | |
int | GpioSpiBus0Deselect (NUTSPINODE *node) |
Deselect a device on the SPI bus. | |
Variables | |
NUTSPIBUS | spiBus0Gpio |
AVR SPI bus driver implementation structure. |
int GpioSpiBus0Transfer | ( | NUTSPINODE * | node, | |
CONST void * | txbuf, | |||
void * | rxbuf, | |||
int | xlen | |||
) |
Transfer data on the SPI bus.
A device must have been selected by calling GpioSpi0Select().
node | Specifies the SPI bus node. | |
txbuf | Pointer to the transmit buffer. If NULL, undetermined byte values are transmitted. | |
rxbuf | Pointer to the receive buffer. If NULL, then incoming data is discarded. | |
xlen | Number of bytes to transfer. |
Definition at line 301 of file spibus0gpio.c.
References NUTASSERT, SPI_MODE_0, SPI_MODE_1, SPI_MODE_2, and SPI_MODE_3.
int GpioSpiBus0NodeInit | ( | NUTSPINODE * | node | ) |
Initialize an SPI bus node.
This routine is called for each SPI node, which is registered via NutRegisterSpiDevice().
node | Specifies the SPI bus node. |
Definition at line 339 of file spibus0gpio.c.
References GpioSpiSetup(), NUTASSERT, and SPI_MODE_CSHIGH.
int GpioSpiBus0Select | ( | NUTSPINODE * | node, | |
uint32_t | tmo | |||
) |
Select a device on the SPI bus.
Locks and activates the bus for the specified node.
node | Specifies the SPI bus node. | |
tmo | Timeout in milliseconds. To disable timeout, set this parameter to NUT_WAIT_INFINITE. |
Definition at line 364 of file spibus0gpio.c.
References EIO, errno, GPIO_CFG_OUTPUT, GpioPinConfigSet(), GpioPinSetLow(), GpioSpiSetup(), NUTASSERT, NutEventPost(), NutEventWait(), SPI_MODE_CPOL, SPI_MODE_CSHIGH, and SPI_MODE_UPDATE.
int GpioSpiBus0Deselect | ( | NUTSPINODE * | node | ) |
Deselect a device on the SPI bus.
Deactivates the chip select and unlocks the bus.
node | Specifies the SPI bus node. |
Definition at line 411 of file spibus0gpio.c.
References NUTASSERT, NutEventPost(), and SPI_MODE_CSHIGH.
NUTSPIBUS spiBus0Gpio |
Initial value:
{ NULL, NULL, 0, NULL, GpioSpiBus0NodeInit, GpioSpiBus0Select, GpioSpiBus0Deselect, GpioSpiBus0Transfer, NutSpiBusWait, NutSpiBusSetMode, NutSpiBusSetRate, NutSpiBusSetBits }
Definition at line 429 of file spibus0gpio.c.