neorv32_sdi.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 - 2025 Stephan Nolting. All rights reserved.                  //
// Licensed under the BSD-3-Clause license, see LICENSE for details.                //
// SPDX-License-Identifier: BSD-3-Clause                                            //
// ================================================================================ //

 
#ifndef NEORV32_SDI_H
#define NEORV32_SDI_H
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t CTRL; 
  uint32_t DATA; 
} neorv32_sdi_t;

#define NEORV32_SDI ((neorv32_sdi_t*) (NEORV32_SDI_BASE))

enum NEORV32_SDI_CTRL_enum {
  SDI_CTRL_EN           =  0, 
 
  SDI_CTRL_FIFO_LSB     =  4, 
  SDI_CTRL_FIFO_MSB     =  7, 
 
  SDI_CTRL_IRQ_RX_AVAIL = 15, 
  SDI_CTRL_IRQ_RX_HALF  = 16, 
  SDI_CTRL_IRQ_RX_FULL  = 17, 
  SDI_CTRL_IRQ_TX_EMPTY = 18, 
  SDI_CTRL_IRQ_TX_NHALF = 19, 
 
  SDI_CTRL_RX_AVAIL     = 23, 
  SDI_CTRL_RX_HALF      = 24, 
  SDI_CTRL_RX_FULL      = 25, 
  SDI_CTRL_TX_EMPTY     = 26, 
  SDI_CTRL_TX_NHALF     = 27, 
  SDI_CTRL_TX_FULL      = 28, 
 
  SDI_CTRL_CS_ACTIVE    = 31  
};

 
 
/**********************************************************************/
int  neorv32_sdi_available(void);
void neorv32_sdi_setup(uint32_t irq_mask);
void neorv32_sdi_disable(void);
void neorv32_sdi_enable(void);
int  neorv32_sdi_get_fifo_depth(void);
int  neorv32_sdi_put(uint8_t data);
int  neorv32_sdi_get(uint8_t* data);
int  neorv32_sdi_check_cs(void);
 
 
#endif // NEORV32_SDI_H