neorv32_onewire.h

Go to the documentation of this file.

// ================================================================================ //
// The NEORV32 RISC-V Processor - https://github.com/stnolting/neorv32              //
// Copyright (c) NEORV32 contributors.                                              //
// Copyright (c) 2020 - 2024 Stephan Nolting. All rights reserved.                  //
// Licensed under the BSD-3-Clause license, see LICENSE for details.                //
// SPDX-License-Identifier: BSD-3-Clause                                            //
// ================================================================================ //
 
#ifndef neorv32_onewire_h
#define neorv32_onewire_h
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t CTRL; 
  uint32_t DATA; 
} neorv32_onewire_t;
 
#define NEORV32_ONEWIRE ((neorv32_onewire_t*) (NEORV32_ONEWIRE_BASE))
 
enum NEORV32_ONEWIRE_CTRL_enum {
  ONEWIRE_CTRL_EN        =  0, 
  ONEWIRE_CTRL_PRSC0     =  1, 
  ONEWIRE_CTRL_PRSC1     =  2, 
  ONEWIRE_CTRL_CLKDIV0   =  3, 
  ONEWIRE_CTRL_CLKDIV1   =  4, 
  ONEWIRE_CTRL_CLKDIV2   =  5, 
  ONEWIRE_CTRL_CLKDIV3   =  6, 
  ONEWIRE_CTRL_CLKDIV4   =  7, 
  ONEWIRE_CTRL_CLKDIV5   =  8, 
  ONEWIRE_CTRL_CLKDIV6   =  9, 
  ONEWIRE_CTRL_CLKDIV7   = 10, 
  ONEWIRE_CTRL_TRIG_RST  = 11, 
  ONEWIRE_CTRL_TRIG_BIT  = 12, 
  ONEWIRE_CTRL_TRIG_BYTE = 13, 
  ONEWIRE_CTRL_SENSE     = 29, 
  ONEWIRE_CTRL_PRESENCE  = 30, 
  ONEWIRE_CTRL_BUSY      = 31, 
};
 
enum NEORV32_ONEWIRE_DATA_enum {
  ONEWIRE_DATA_LSB = 0, 
  ONEWIRE_DATA_MSB = 7  
};
/**********************************************************************/
int     neorv32_onewire_available(void);
int     neorv32_onewire_setup(uint32_t t_base);
void    neorv32_onewire_enable(void);
void    neorv32_onewire_disable(void);
int     neorv32_onewire_sense(void);
 
int     neorv32_onewire_busy(void);
void    neorv32_onewire_reset(void);
int     neorv32_onewire_reset_get_presence(void);
void    neorv32_onewire_read_bit(void);
uint8_t neorv32_onewire_read_bit_get(void);
void    neorv32_onewire_write_bit(uint8_t bit);
void    neorv32_onewire_read_byte(void);
uint8_t neorv32_onewire_read_byte_get(void);
void    neorv32_onewire_write_byte(uint8_t byte);
 
int     neorv32_onewire_reset_blocking(void);
uint8_t neorv32_onewire_read_bit_blocking(void);
void    neorv32_onewire_write_bit_blocking(uint8_t bit);
uint8_t neorv32_onewire_read_byte_blocking(void);
void    neorv32_onewire_write_byte_blocking(uint8_t byte);
#endif // neorv32_onewire_h