neorv32_xirq.h

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// ================================================================================ //
// 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_xirq_h
#define neorv32_xirq_h
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t EIE;  
  uint32_t ESC;  
  uint32_t TTYP; 
  uint32_t TPOL; 
} neorv32_xirq_t;
 
#define NEORV32_XIRQ ((neorv32_xirq_t*) (NEORV32_XIRQ_BASE))
/**********************************************************************/
enum XIRQ_TRIGGER_enum {
  XIRQ_TRIGGER_LEVEL_LOW    = 0b00, // low-level
  XIRQ_TRIGGER_LEVEL_HIGH   = 0b01, // high-level
  XIRQ_TRIGGER_EDGE_FALLING = 0b10, // falling-edge
  XIRQ_TRIGGER_EDGE_RISING  = 0b11  // rising-edge
};
 
 
/**********************************************************************/
int  neorv32_xirq_available(void);
int  neorv32_xirq_setup(void);
void neorv32_xirq_global_enable(void);
void neorv32_xirq_global_disable(void);
int  neorv32_xirq_get_num(void);
void neorv32_xirq_setup_trigger(int channel, int config);
void neorv32_xirq_channel_enable(int channel);
void neorv32_xirq_channel_disable(int channel);
int  neorv32_xirq_install(int channel, void (*handler)(void));
int  neorv32_xirq_uninstall(int channel);
#endif // neorv32_xirq_h