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Functions | |
| void | spi_master_transfer_multibyte (spi_mb_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint8_t bit_width, uint32_t handler, uint32_t event, DMAUsage hint) |
| Begin the SPI transfer. | |
| uint32_t | spi_irq_handler_asynch_multibyte (spi_mb_t *obj) |
| The asynchronous IRQ handler. | |
| uint8_t | spi_active_multibyte (spi_mb_t *obj) |
| Attempts to determine if the SPI peripheral is already in use. | |
| void | spi_abort_asynch_multibyte (spi_mb_t *obj) |
| Abort an SPI transfer. | |
Function Documentation
| void spi_abort_asynch_multibyte | ( | spi_mb_t * | obj ) |
Abort an SPI transfer.
- Parameters:
-
obj The SPI peripheral to stop
Definition at line 536 of file spi_api_multibyte.c.
| uint8_t spi_active_multibyte | ( | spi_mb_t * | obj ) |
Attempts to determine if the SPI peripheral is already in use.
If a temporary DMA channel has been allocated, peripheral is in use. If a permanent DMA channel has been allocated, check if the DMA channel is in use. If not, proceed as though no DMA channel were allocated. If no DMA channel is allocated, check whether tx and rx buffers have been assigned. For each assigned buffer, check if the corresponding buffer position is less than the buffer length. If buffers do not indicate activity, check if there are any bytes in the FIFOs.
- Parameters:
-
[in] obj The SPI object to check for activity
- Returns:
- Non-zero if the SPI port is active or zero if it is not.
Definition at line 529 of file spi_api_multibyte.c.
| uint32_t spi_irq_handler_asynch_multibyte | ( | spi_mb_t * | obj ) |
The asynchronous IRQ handler.
Reads the received values out of the RX FIFO, writes values into the TX FIFO and checks for transfer termination conditions, such as buffer overflows or transfer complete.
- Parameters:
-
[in] obj The SPI object that holds the transfer information
- Returns:
- Event flags if a transfer termination condition was met; otherwise 0.
Definition at line 522 of file spi_api_multibyte.c.
| void spi_master_transfer_multibyte | ( | spi_mb_t * | obj, |
| const void * | tx, | ||
| size_t | tx_length, | ||
| void * | rx, | ||
| size_t | rx_length, | ||
| uint8_t | bit_width, | ||
| uint32_t | handler, | ||
| uint32_t | event, | ||
| DMAUsage | hint | ||
| ) |
Begin the SPI transfer.
Buffer pointers and lengths are specified in tx_buff and rx_buff
- Parameters:
-
[in] obj The SPI object that holds the transfer information [in] tx The transmit buffer [in] tx_length The number of bytes to transmit [in] rx The receive buffer [in] rx_length The number of bytes to receive [in] bit_width The bit width of buffer words [in] event The logical OR of events to be registered [in] handler SPI interrupt handler [in] hint A suggestion for how to use DMA with this transfer
Definition at line 503 of file spi_api_multibyte.c.
Generated on Wed Jul 13 2022 02:55:24 by
1.7.2