K1Guitar/project/src/wk_system.c

/* add user code begin Header */
/**
  **************************************************************************
  * @file     wk_system.c
  * @brief    work bench config program
  **************************************************************************
  *                       Copyright notice & Disclaimer
  *
  * The software Board Support Package (BSP) that is made available to
  * download from Artery official website is the copyrighted work of Artery.
  * Artery authorizes customers to use, copy, and distribute the BSP
  * software and its related documentation for the purpose of design and
  * development in conjunction with Artery microcontrollers. Use of the
  * software is governed by this copyright notice and the following disclaimer.
  *
  * THIS SOFTWARE IS PROVIDED ON "AS IS" BASIS WITHOUT WARRANTIES,
  * GUARANTEES OR REPRESENTATIONS OF ANY KIND. ARTERY EXPRESSLY DISCLAIMS,
  * TO THE FULLEST EXTENT PERMITTED BY LAW, ALL EXPRESS, IMPLIED OR
  * STATUTORY OR OTHER WARRANTIES, GUARANTEES OR REPRESENTATIONS,
  * INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
  *
  **************************************************************************
  */
/* add user code end Header */

#include "includes.h"

/* global variable */
volatile uint32_t timebase_ticks;

/**
  * @brief  this function is called to increment a global variable "timebase_ticks"
  *         used as application time base.
  * @param  none
  * @retval none
  */
__WEAK void wk_timebase_increase(void)
{
  timebase_ticks ++;
}

/**
  * @brief  provides a tick value in millisecond.
  * @param  none
  * @retval tick value
  */
__WEAK uint32_t wk_timebase_get(void)
{
  return timebase_ticks;
}

/**
  * @brief  this function provides minimum delay (in milliseconds) based
  *         on variable incremented.
  * @param  delay variable specifies the delay time length, in milliseconds.
  * @retval none
  */
__WEAK void wk_delay_ms(uint32_t delay)
{
  uint32_t start_tick = wk_timebase_get();

  if(delay < 0xFFFFFFFFU)
  {
    delay += 1;
  }

  while((wk_timebase_get() - start_tick) < delay)
  {
  }
}

/**
  * @brief  this function configures the source of the time base
  *         the time source is configured to have 1ms time base
  * @param  none
  * @retval none
  */
__WEAK void wk_timebase_init(void)
{
  crm_clocks_freq_type crm_clocks;
  uint32_t frequency = 0;

  /* get crm_clocks */
  crm_clocks_freq_get(&crm_clocks);

  frequency = crm_clocks.ahb_freq;

  /* config systick clock source */
  systick_clock_source_config(SYSTICK_CLOCK_SOURCE_AHBCLK_NODIV);
  /* system tick config */
  SysTick->LOAD  = (uint32_t)((frequency / 1000) - 1UL);
  SysTick->VAL   = 0UL;
  SysTick->CTRL |= SysTick_CTRL_TICKINT_Msk |
                   SysTick_CTRL_ENABLE_Msk;
}
  
/**
  * @brief  this function is called at timebase handler, eg: SysTick_Handler
  * @param  none
  * @retval none
  */
__WEAK void wk_timebase_handler(void)
{
  wk_timebase_increase();
}

/**
  * @brief  busy-wait microsecond delay (NOP loop, no SysTick/RTOS dependency).
  * @param  us  delay in microseconds
  * @retval none
  * @note   240MHz <20><>Լ 1us = 24 <20><> NOP ѭ<><D1AD><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5><EFBFBD>΢<EFBFBD><CEA2>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD>
  *         æ<>Ȼ<EFBFBD>ռס CPU<50><55><EFBFBD>ʺ϶<CABA><CFB6><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>򡢴<EFBFBD><F2A1A2B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><C8A3><EFBFBD>
  */
__WEAK void Delay_us(uint32_t us)
{
  volatile uint32_t i = us * 24;
  while (i--) __NOP();
}

/* ============ TMR6 1ms 硬件定时器（独立于 SysTick 的时间基准） ============ */

/* TMR6 1ms 累计计数 */
volatile uint32_t tmr6_ticks;

/**
  * @brief  TMR6 1ms 中断回调（弱定义，可在用户代码里重写）
  * @param  none
  * @retval none
  * @note   默认只累加计数；如需喂 AutoBand 伴奏库，重写为：
  *         void wk_tmr6_1ms_tick(void) { AutoBandTop1_Metronome_External_1msTick(); }
  */
__WEAK void wk_tmr6_1ms_tick(void)
{
  AutoBandTop1_Metronome_External_1msTick();
}

/**
  * @brief  获取 TMR6 1ms tick 计数值
  * @param  none
  * @retval tick 值（单位 ms）
  */
__WEAK uint32_t wk_tmr6_tick_get(void)
{
  return tmr6_ticks;
}

/**
  * @brief  TMR6 1ms 定时器初始化
  * @note   时钟树: sclk=240MHz, apb1div=2 -> TMR6 时钟 = 2 x apb1clk = 240MHz
  *         DIV=239  -> 计数器时钟 = 240MHz/(239+1) = 1MHz
  *         PR=999   -> 溢出周期 = (999+1) x 1us = 1ms
  * @param  none
  * @retval none
  */
void wk_tmr6_1ms_init(void)
{
  /* 使能 TMR6 时钟 */
  crm_periph_clock_enable(CRM_TMR6_PERIPH_CLOCK, TRUE);

  /* 时基: PR=999, DIV=239 -> 1ms 溢出一次 */
  tmr_base_init(TMR6, 999, 239);

  /* 清一次溢出标志，防止上电残留造成一次假中断 */
  tmr_flag_clear(TMR6, TMR_OVF_FLAG);

  /* 使能溢出中断 */
  tmr_interrupt_enable(TMR6, TMR_OVF_INT, TRUE);

  /* NVIC 使能: 抢占优先级 5（高于 PendSV=15，1ms 节拍不受调度延迟影响） */
  nvic_irq_enable(TMR6_GLOBAL_IRQn, 5, 0);

  /* 启动计数 */
  tmr_counter_enable(TMR6, TRUE);
}