qmk_firmware/tmk_core/protocol/arm_atsam/spi.h

/*
Copyright 2018 Massdrop Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef _SPI_H_
#define _SPI_H_

//TODO: PS: Should bring ports to keyboard configuration

#define SCSPI           SERCOM2

#define P14_DIR         0x00004000                             /* PIN14 DIR Bit */
#define P14_OUT         0x00004000                             /* PIN14 OUT Bit */
#define P15_DIR         0x00008000                             /* PIN15 DIR Bit */
#define P15_OUT         0x00008000                             /* PIN15 OUT Bit */

#define SC2_RCLCK_LO    REG_PORT_OUTCLR1 = P14_OUT             /* PB14 Low, SC2_RCLCK Low                            */
#define SC2_RCLCK_HI    REG_PORT_OUTSET1 = P14_OUT             /* PB14 High, SC2_RCLCK High                          */
#define SC2_OE_ENA      REG_PORT_OUTCLR1 = P15_OUT             /* PB15 Low, SC2_OE_N Low (Shift register enabled)    */
#define SC2_OE_DIS      REG_PORT_OUTSET1 = P15_OUT             /* PB15 High, SC2_OE_N High (Shift register disabled) */
#define SC2_DIRSET      REG_PORT_DIRSET1 = P14_DIR | P15_DIR;  /* PB14 PB15 OUT                                      */

typedef union {
  struct {
    uint16_t RSVD4:1;          /*!< bit:      0                                               */
    uint16_t RSVD3:1;          /*!< bit:      1                                               */
    uint16_t RSVD2:1;          /*!< bit:      2                                               */
    uint16_t RSVD1:1;          /*!< bit:      3                                               */
    uint16_t SDB_N:1;          /*!< bit:      4  SHUTDOWN THE CHIP WHEN 0, RUN WHEN 1         */
    uint16_t IRST:1;           /*!< bit:      5  RESET THE IS3733 I2C WHEN 1, RUN WHEN 0      */
    uint16_t SRC_2:1;          /*!< bit:      6  ADVERTISE A SOURCE TO USBC-2 CC              */
    uint16_t SRC_1:1;          /*!< bit:      7  ADVERTISE A SOURCE TO USBC-1 CC              */
    uint16_t E_VBUS_2:1;       /*!< bit:      8  ENABLE 5V OUT TO USBC-2 WHEN 1               */
    uint16_t E_VBUS_1:1;       /*!< bit:      9  ENABLE 5V OUT TO USBC-1 WHEN 1               */
    uint16_t E_DN1_N:1;        /*!< bit:     10  ENABLE DN1 1:2 MUX WHEN 0                    */
    uint16_t S_DN1:1;          /*!< bit:     11  SELECT DN1 PATH 0:USBC-1, 1:USBC-2           */
    uint16_t E_UP_N:1;         /*!< bit:     12  ENABLE SUP 1:2 MUX WHEN 0                    */
    uint16_t S_UP:1;           /*!< bit:     13  SELECT UP PATH 0:USBC-1, 1:USBC-2            */
    uint16_t HUB_RESET_N:1;    /*!< bit:     14  RESET USB HUB WHEN 0, RUN WHEN 1             */
    uint16_t HUB_CONNECT:1;    /*!< bit:     15  SIGNAL VBUS CONNECT TO USB HUB WHEN 1        */
  } bit;                       /*!< Structure used for bit access                             */
  uint16_t reg;                /*!< Type      used for register access                        */
} Srdata_t;

extern Srdata_t srdata;

void SPI_WriteSRData(void);
void SPI_Init(void);

#endif //_SPI_H_