index : iCE40/yosys	master
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path: root/frontends/verilog/verilog_parser.y

	Commit message (Expand)	Author	Age	Files	Lines
...
*	Added $initstate cell type and vlog function	Clifford Wolf	2016-07-21	1	-0/+2
*	After reading the SV spec, using non-standard predict() instead of expect()	Clifford Wolf	2016-07-21	1	-5/+5
*	Added basic support for $expect cells	Clifford Wolf	2016-07-13	1	-1/+8
*	Allow defining input ports as "input logic" in SystemVerilog	Ruben Undheim	2016-06-20	1	-2/+2
*	Added support for SystemVerilog packages with localparam definitions	Ruben Undheim	2016-06-18	1	-0/+29
*	Fixed handling of parameters and const functions in casex/casez pattern	Clifford Wolf	2016-04-21	1	-2/+6
*	Fixed Verilog parser fix and more similar improvements	Clifford Wolf	2016-03-15	1	-18/+9
*	Use left-recursive rule for cell_port_list in Verilog parser.	Andrew Becker	2016-03-15	1	-6/+10
*	Fixed handling of parameters and localparams in functions	Clifford Wolf	2015-11-11	1	-1/+1
*	Fixed bug in verilog parser	Clifford Wolf	2015-10-15	1	-1/+1
*	Added support for "parameter" and "localparam" in global context	Clifford Wolf	2015-10-07	1	-0/+2
*	Fixed detection of "task foo(bar);" syntax error	Clifford Wolf	2015-09-22	1	-0/+2
*	Adjust makefiles to work with out-of-tree builds	Clifford Wolf	2015-08-12	1	-1/+1
*	Fixed trailing whitespaces	Clifford Wolf	2015-07-02	1	-5/+5
*	Added non-std verilog assume() statement	Clifford Wolf	2015-02-26	1	-2/+8
*	Parser support for complex delay expressions	Clifford Wolf	2015-02-20	1	-7/+20
*	YosysJS stuff	Clifford Wolf	2015-02-19	1	-0/+1
*	Improved read_verilog support for empty behavioral statements	Clifford Wolf	2015-02-10	1	-6/+2
*	Fixed supply0/supply1 with many wires	Clifford Wolf	2014-12-11	1	-3/+15
*	Added warning for use of 'z' constants in HDL	Clifford Wolf	2014-11-14	1	-4/+4
*	Fixed parsing of nested verilog concatenation and replicate	Clifford Wolf	2014-11-12	1	-1/+1
*	Fixed parsing of "module mymod #( parameter foo = 1, bar = 2 ..."	Clifford Wolf	2014-10-30	1	-4/+5
*	Added support for task and function args in parentheses	Clifford Wolf	2014-10-27	1	-6/+45
*	Updated lexers & parsers to include prefixes	William Speirs	2014-10-15	1	-0/+1434

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generated by cgit v1.2.3 (git 2.25.1) at 2025-12-12 03:44:26 +0000

/*
    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
 * @file    LPC13xx/gpt_lld.c
 * @brief   LPC13xx GPT subsystem low level driver source.
 *
 * @addtogroup GPT
 * @{
 */

#include "ch.h"
#include "hal.h"

#if HAL_USE_GPT || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/

/**
 * @brief   GPT1 driver identifier.
 * @note    The driver GPT1 allocates the complex timer CT16B0 when enabled.
 */
#if LPC13xx_GPT_USE_CT16B0 || defined(__DOXYGEN__)
GPTDriver GPTD1;
#endif

/**
 * @brief   GPT2 driver identifier.
 * @note    The driver GPT2 allocates the timer CT16B1 when enabled.
 */
#if LPC13xx_GPT_USE_CT16B1 || defined(__DOXYGEN__)
GPTDriver GPTD2;
#endif

/**
 * @brief   GPT3 driver identifier.
 * @note    The driver GPT3 allocates the timer CT32B0 when enabled.
 */
#if LPC13xx_GPT_USE_CT32B0 || defined(__DOXYGEN__)
GPTDriver GPTD3;
#endif

/**
 * @brief   GPT4 driver identifier.
 * @note    The driver GPT4 allocates the timer CT32B1 when enabled.
 */
#if LPC13xx_GPT_USE_CT32B1 || defined(__DOXYGEN__)
GPTDriver GPTD4;
#endif

/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

/**
 * @brief   Shared IRQ handler.
 *
 * @param[in] gptp      pointer to a @p GPTDriver object
 */
static void gpt_lld_serve_interrupt(GPTDriver *gptp) {

  gptp->tmr->IR = 1;                        /* Clear interrupt on match MR0.*/
  if (gptp->state == GPT_ONESHOT) {
    gptp->state = GPT_READY;                /* Back in GPT_READY state.     */
    gpt_lld_stop_timer(gptp);               /* Timer automatically stopped. */
  }
  gptp->config->callback(gptp);
}

/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/

#if LPC13xx_GPT_USE_CT16B0
/**
 * @brief   CT16B0 interrupt handler.
 *
 * @isr
 */
CH_IRQ_HANDLER(VectorE4) {

  CH_IRQ_PROLOGUE();

  gpt_lld_serve_interrupt(&GPTD1);

  CH_IRQ_EPILOGUE();
}
#endif /* LPC13xx_GPT_USE_CT16B0 */

#if LPC13xx_GPT_USE_CT16B1
/**
 * @brief   CT16B1 interrupt handler.
 *
 * @isr
 */
CH_IRQ_HANDLER(VectorE8) {

  CH_IRQ_PROLOGUE();

  gpt_lld_serve_interrupt(&GPTD2);

  CH_IRQ_EPILOGUE();
}
#endif /* LPC13xx_GPT_USE_CT16B0 */

#if LPC13xx_GPT_USE_CT32B0
/**
 * @brief   CT32B0 interrupt handler.
 *
 * @isr
 */
CH_IRQ_HANDLER(VectorEC) {

  CH_IRQ_PROLOGUE();

  gpt_lld_serve_interrupt(&GPTD3);

  CH_IRQ_EPILOGUE();
}
#endif /* LPC13xx_GPT_USE_CT32B0 */

#if LPC13xx_GPT_USE_CT32B1
/**
 * @brief   CT32B1 interrupt handler.
 *
 * @isr
 */
CH_IRQ_HANDLER(VectorF0) {

  CH_IRQ_PROLOGUE();

  gpt_lld_serve_interrupt(&GPTD4);

  CH_IRQ_EPILOGUE();
}
#endif /* LPC13xx_GPT_USE_CT32B1 */

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

/**
 * @brief   Low level GPT driver initialization.
 *
 * @notapi
 */
void gpt_lld_init(void) {

#if LPC13xx_GPT_USE_CT16B0
  /* Driver initialization.*/
  GPTD1.tmr = LPC_TMR16B0;
  gptObjectInit(&GPTD1);
#endif

#if LPC13xx_GPT_USE_CT16B1
  /* Driver initialization.*/
  GPTD2.tmr = LPC_TMR16B1;
  gptObjectInit(&GPTD2);
#endif

#if LPC13xx_GPT_USE_CT32B0
  /* Driver initialization.*/
  GPTD3.tmr = LPC_TMR32B0;
  gptObjectInit(&GPTD3);
#endif

#if LPC13xx_GPT_USE_CT32B1
  /* Driver initialization.*/
  GPTD4.tmr = LPC_TMR32B1;
  gptObjectInit(&GPTD4);
#endif
}

/**
 * @brief   Configures and activates the GPT peripheral.
 *
 * @param[in] gptp      pointer to the @p GPTDriver object
 *
 * @notapi
 */
void gpt_lld_start(GPTDriver *gptp) {
  uint32_t pr;

  if (gptp->state == GPT_STOP) {
    /* Clock activation.*/
#if LPC13xx_GPT_USE_CT16B0
    if (&GPTD1 == gptp) {
      LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 7);
      nvicEnableVector(TIMER_16_0_IRQn, CORTEX_PRIORITY_MASK(2));
    }
#endif
#if LPC13xx_GPT_USE_CT16B1
    if (&GPTD2 == gptp) {
      LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 8);
      nvicEnableVector(TIMER_16_1_IRQn, CORTEX_PRIORITY_MASK(3));
    }
#endif
#if LPC13xx_GPT_USE_CT32B0
    if (&GPTD3 == gptp) {
      LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 9);
      nvicEnableVector(TIMER_32_0_IRQn, CORTEX_PRIORITY_MASK(2));
    }
#endif
#if LPC13xx_GPT_USE_CT32B1
    if (&GPTD4 == gptp) {
      LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 10);
      nvicEnableVector(TIMER_32_1_IRQn, CORTEX_PRIORITY_MASK(2));
    }
#endif
  }

  /* Prescaler value calculation.*/
  pr = (uint16_t)((LPC13xx_SYSCLK / gptp->config->frequency) - 1);
  chDbgAssert(((uint32_t)(pr + 1) * gptp->config->frequency) == LPC13xx_SYSCLK,
              "gpt_lld_start(), #1", "invalid frequency");

  /* Timer configuration.*/
  gptp->tmr->PR  = pr;
  gptp->tmr->IR  = 1;
  gptp->tmr->MCR = 0;
  gptp->tmr->TCR = 0;
}

/**
 * @brief   Deactivates the GPT peripheral.
 *
 * @param[in] gptp      pointer to the @p GPTDriver object
 *
 * @notapi
 */
void gpt_lld_stop(GPTDriver *gptp) {

  if (gptp->state == GPT_READY) {
    gptp->tmr->MCR = 0;
    gptp->tmr->TCR = 0;

#if LPC13xx_GPT_USE_CT16B0
    if (&GPTD1 == gptp) {
      nvicDisableVector(TIMER_16_0_IRQn);
      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 7);
    }
#endif
#if LPC13xx_GPT_USE_CT16B1
    if (&GPTD2 == gptp) {
      nvicDisableVector(TIMER_16_1_IRQn);
      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 8);
    }
#endif
#if LPC13xx_GPT_USE_CT32B0
    if (&GPTD3 == gptp) {
      nvicDisableVector(TIMER_32_0_IRQn);
      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 9);
    }
#endif
#if LPC13xx_GPT_USE_CT32B1
    if (&GPTD4 == gptp) {
      nvicDisableVector(TIMER_32_1_IRQn);
      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 10);
    }
#endif
  }
}

/**
 * @brief   Starts the timer in continuous mode.
 *
 * @param[in] gptp      pointer to the @p GPTDriver object
 * @param[in] interval  period in ticks
 *
 * @notapi
 */
void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) {

  gptp->tmr->MR0 = interval - 1;
  gptp->tmr->IR  = 1;
  gptp->tmr->MCR = 3;                       /* IRQ and clr TC on match MR0. */
  gptp->tmr->TCR = 2;                       /* Reset counter and prescaler. */
  gptp->tmr->TCR = 1;                       /* Timer enabled.               */
}

/**
 * @brief   Stops the timer.
 *
 * @param[in] gptp      pointer to the @p GPTDriver object
 *
 * @notapi
 */
void gpt_lld_stop_timer(GPTDriver *gptp) {

  gptp->tmr->IR  = 1;
  gptp->tmr->MCR = 0;
  gptp->tmr->TCR = 0;
}

/**
 * @brief   Starts the timer in one shot mode and waits for completion.
 * @details This function specifically polls the timer waiting for completion
 *          in order to not have extra delays caused by interrupt servicing,
 *          this function is only recommended for short delays.
 *
 * @param[in] gptp      pointer to the @p GPTDriver object
 * @param[in] interval  time interval in ticks
 *
 * @notapi
 */
void gpt_lld_polled_delay(GPTDriver *gptp, gptcnt_t interval) {

  gptp->tmr->MR0 = interval - 1;
  gptp->tmr->IR  = 1;
  gptp->tmr->MCR = 4;                       /* Stop TC on match MR0.        */
  gptp->tmr->TCR = 2;                       /* Reset counter and prescaler. */
  gptp->tmr->TCR = 1;                       /* Timer enabled.               */
  while (gptp->tmr->TCR & 1)
    ;
}

#endif /* HAL_USE_GPT */

/** @} */