neorv32_gptmr.h

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// ================================================================================ //
// 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_GPTMR_H
#define NEORV32_GPTMR_H
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t       CTRL;  
  uint32_t       THRES; 
  const uint32_t COUNT; 
} neorv32_gptmr_t;

#define NEORV32_GPTMR ((neorv32_gptmr_t*) (NEORV32_GPTMR_BASE))

enum NEORV32_GPTMR_CTRL_enum {
  GPTMR_CTRL_EN      = 0, 
  GPTMR_CTRL_PRSC0   = 1, 
  GPTMR_CTRL_PRSC1   = 2, 
  GPTMR_CTRL_PRSC2   = 3, 
 
  GPTMR_CTRL_IRQ_CLR = 30, 
  GPTMR_CTRL_IRQ_PND = 31, 
};

 
 
/**********************************************************************/
int  neorv32_gptmr_available(void);
void neorv32_gptmr_setup(int prsc, uint32_t threshold);
void neorv32_gptmr_disable(void);
void neorv32_gptmr_enable(void);
void neorv32_gptmr_irq_ack(void);
 
 
#endif // NEORV32_GPTMR_H