111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*****************************************************************************
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* | File : sysfs_software_spi.h
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* | Author : Waveshare team
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* | Function : Read and write /sys/class/gpio, software spi
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* | Info :
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*----------------
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* | This version: V1.0
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* | Date : 2019-06-05
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* | Info : Basic version
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*
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documnetation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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******************************************************************************/
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#ifndef __SYSFS_SOFTWARE_SPI_
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#define __SYSFS_SOFTWARE_SPI_
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#include "sysfs_gpio.h"
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#include <stdint.h>
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#include <stdio.h>
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#define SYSFS_SOFTWARE_SPI_DEBUG 1
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#if SYSFS_SOFTWARE_SPI_DEBUG
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#define SYSFS_SOFTWARE_SPI_Debug(__info,...) printf("Debug: " __info,##__VA_ARGS__)
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#else
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#define SYSFS_SOFTWARE_SPI_Debug(__info,...)
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#endif
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/**
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* SPI communication mode
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**/
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typedef enum {
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SOFTWARE_SPI_Mode0, /* Clock Polarity is 0 and Clock Phase is 0 */
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SOFTWARE_SPI_Mode1, /* Clock Polarity is 0 and Clock Phase is 1 */
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SOFTWARE_SPI_Mode2, /* Clock Polarity is 1 and Clock Phase is 0 */
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SOFTWARE_SPI_Mode3, /* Clock Polarity is 1 and Clock Phase is 1 */
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} SOFTWARE_SPI_Mode;
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/**
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* SPI clock(div)
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**/
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typedef enum {
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SOFTWARE_SPI_CLOCK_DIV2,
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SOFTWARE_SPI_CLOCK_DIV4,
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SOFTWARE_SPI_CLOCK_DIV8,
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SOFTWARE_SPI_CLOCK_DIV16,
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SOFTWARE_SPI_CLOCK_DIV32,
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SOFTWARE_SPI_CLOCK_DIV64,
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SOFTWARE_SPI_CLOCK_DIV128,
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} SOFTWARE_SPI_Clock;
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/**
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* Define SPI type
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**/
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typedef enum {
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SOFTWARE_SPI_Master,
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SOFTWARE_SPI_Slave,
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} SOFTWARE_SPI_Type;
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/**
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* Define SPI order
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**/
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typedef enum {
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SOFTWARE_SPI_LSBFIRST,
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SOFTWARE_SPI_MSBFIRST,
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} SOFTWARE_SPI_Order;
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/**
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* Define SPI attribute
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**/
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typedef struct SPIStruct {
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//GPIO
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uint16_t SCLK_PIN;
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uint16_t MOSI_PIN;
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uint16_t MISO_PIN;
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uint16_t CS_PIN;
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//Mode
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SOFTWARE_SPI_Mode Mode;
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uint8_t CPOL;
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uint8_t CPHA;
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SOFTWARE_SPI_Clock Delay;
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SOFTWARE_SPI_Type Type;
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SOFTWARE_SPI_Order Order;
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} SOFTWARE_SPI;
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void SYSFS_software_spi_begin(void);
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void SYSFS_software_spi_end(void);
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void SYSFS_software_spi_setBitOrder(uint8_t order);
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void SYSFS_software_spi_setDataMode(uint8_t mode);
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void SYSFS_software_spi_setClockDivider(uint8_t div);
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uint8_t SYSFS_software_spi_transfer(uint8_t value);
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#endif |