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Functions | |
| int | spi_master_write (spi_t *obj, int value) |
| Write a byte out in master mode and receive a value. | |
| int | spi_master_block_write (spi_t *obj, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, char write_fill) |
| Write a block out in master mode and receive a value. | |
| int | spi_slave_receive (spi_t *obj) |
| Check if a value is available to read. | |
| int | spi_slave_read (spi_t *obj) |
| Get a received value out of the SPI receive buffer in slave mode. | |
| void | spi_slave_write (spi_t *obj, int value) |
| Write a value to the SPI peripheral in slave mode. | |
| int | spi_busy (spi_t *obj) |
| Checks if the specified SPI peripheral is in use. | |
| uint8_t | spi_get_module (spi_t *obj) |
| Get the module number. | |
Function Documentation
| int spi_busy | ( | spi_t * | obj ) |
Checks if the specified SPI peripheral is in use.
- Parameters:
-
[in] obj The SPI peripheral to check
- Returns:
- non-zero if the peripheral is currently transmitting
| uint8_t spi_get_module | ( | spi_t * | obj ) |
Get the module number.
- Parameters:
-
[in] obj The SPI peripheral to check
- Returns:
- The module number
| int spi_master_block_write | ( | spi_t * | obj, |
| const char * | tx_buffer, | ||
| int | tx_length, | ||
| char * | rx_buffer, | ||
| int | rx_length, | ||
| char | write_fill | ||
| ) |
Write a block out in master mode and receive a value.
The total number of bytes sent and received will be the maximum of tx_length and rx_length. The bytes written will be padded with the value 0xff.
- Parameters:
-
[in] obj The SPI peripheral to use for sending [in] tx_buffer Pointer to the byte-array of data to write to the device [in] tx_length Number of bytes to write, may be zero [in] rx_buffer Pointer to the byte-array of data to read from the device [in] rx_length Number of bytes to read, may be zero [in] write_fill Default data transmitted while performing a read
- Returns:
- The number of bytes written and read from the device. This is maximum of tx_length and rx_length.
| int spi_master_write | ( | spi_t * | obj, |
| int | value | ||
| ) |
Write a byte out in master mode and receive a value.
- Parameters:
-
[in] obj The SPI peripheral to use for sending [in] value The value to send
- Returns:
- Returns the value received during send
| int spi_slave_read | ( | spi_t * | obj ) |
Get a received value out of the SPI receive buffer in slave mode.
Blocks until a value is available
- Parameters:
-
[in] obj The SPI peripheral to read
- Returns:
- The value received
| int spi_slave_receive | ( | spi_t * | obj ) |
Check if a value is available to read.
- Parameters:
-
[in] obj The SPI peripheral to check
- Returns:
- non-zero if a value is available
| void spi_slave_write | ( | spi_t * | obj, |
| int | value | ||
| ) |
Write a value to the SPI peripheral in slave mode.
Blocks until the SPI peripheral can be written to
- Parameters:
-
[in] obj The SPI peripheral to write [in] value The value to write
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