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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*****************************************************************************/
/**
* @brief HardwareSPI definitions
*/
#ifndef _HARDWARESPI_H_
#define _HARDWARESPI_H_
/**
* Defines the possible SPI communication speeds.
*/
typedef enum SPIFrequency {
SPI_18MHZ = 0, /**< 18 MHz */
SPI_9MHZ = 1, /**< 9 MHz */
SPI_4_5MHZ = 2, /**< 4.5 MHz */
SPI_2_25MHZ = 3, /**< 2.25 MHZ */
SPI_1_125MHZ = 4, /**< 1.125 MHz */
SPI_562_500KHZ = 5, /**< 562.500 KHz */
SPI_281_250KHZ = 6, /**< 281.250 KHz */
SPI_140_625KHZ = 7, /**< 140.625 KHz */
MAX_SPI_FREQS = 8, /**< The number of SPI frequencies. */
} SPIFrequency;
/* Documented by hand in docs/source/lang/api/hardwarespi.rst; if you
make any changes, make sure to update this document. */
class HardwareSPI {
private:
uint32 spi_num;
public:
HardwareSPI(uint32 spi_num);
void begin(void);
void begin(SPIFrequency freq, uint32 endianness, uint32 mode);
uint8 send(uint8 data);
uint8 send(uint8 *data, uint32 length);
uint8 recv(void);
};
#endif
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