Roger Weng
LT_SPI
LT_SPI.cpp File Reference
Go to the source code of this file.
Functions | |
| void | spi_transfer_byte (uint8_t cs_pin, uint8_t tx, uint8_t *rx) |
| Reads and sends a byte. | |
| void | spi_transfer_word (uint8_t cs_pin, uint16_t tx, uint16_t *rx) |
| Reads and sends a word. | |
| void | spi_transfer_block (uint8_t cs_pin, uint8_t *tx, uint8_t *rx, uint8_t length) |
| Reads and sends a byte array. | |
| void | spi_enable (void) |
| Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C. | |
Detailed Description
Library for LT_SPI: Routines to communicate with ATmega328P's hardware SPI port.
Definition in file LT_SPI.cpp.
Function Documentation
| void spi_enable | ( | void | ) |
Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C.
Configure the SPI port for 4Mhz SCK. This function or spi_enable() must be called before using the other SPI routines. Setup the processor for hardware SPI communication. Must be called before using the other SPI routines. Alternatively, call quikeval_SPI_connect(), which automatically calls this function. Configures SCK frequency. Use constant defined in header file.
Definition at line 176 of file LT_SPI.cpp.
| void spi_transfer_block | ( | uint8_t | cs_pin, |
| uint8_t * | tx, | ||
| uint8_t * | rx, | ||
| uint8_t | length | ||
| ) |
Reads and sends a byte array.
- Returns:
- void
1) Pull CS low
2) Read and send byte array
3) Pull CS high
- Parameters:
-
cs_pin Chip select pin tx Byte array to be transmitted rx Byte array to be received length Length of array
Definition at line 142 of file LT_SPI.cpp.
| void spi_transfer_byte | ( | uint8_t | cs_pin, |
| uint8_t | tx, | ||
| uint8_t * | rx | ||
| ) |
Reads and sends a byte.
- Returns:
- void
1) Pull CS low
2) Read byte and send byte
3) Pull CS high
- Parameters:
-
cs_pin Chip select pin tx Byte to be transmitted rx Byte to be received
Definition at line 104 of file LT_SPI.cpp.
| void spi_transfer_word | ( | uint8_t | cs_pin, |
| uint16_t | tx, | ||
| uint16_t * | rx | ||
| ) |
Reads and sends a word.
- Returns:
- void
1) Pull CS low
2) Read MSB and send MSB
3) Read LSB and send LSB
4) Pull CS high
- Parameters:
-
cs_pin Chip select pin tx Byte to be transmitted rx Byte to be received
Definition at line 115 of file LT_SPI.cpp.
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