112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
/*!
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\file main.c
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\brief TIMER2 oc timebase demo for gd32w51x
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\version 2021-10-30, V1.0.0, firmware for GD32W51x
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*/
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/*
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Copyright (c) 2021, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32w51x.h"
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#include <stdio.h>
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#include "gd32w515p_eval.h"
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/* configure the TIMER peripheral */
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void timer_config(void);
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/* configure the TIMER interrupt */
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void nvic_config(void);
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/*!
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\brief configure the TIMER interrupt
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\param[in] none
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\param[out] none
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\retval none
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*/
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void nvic_config(void)
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{
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nvic_irq_enable(TIMER2_IRQn, 0, 0);
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}
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/*!
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\brief configure the TIMER peripheral
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\param[in] none
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\param[out] none
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\retval none
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*/
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void timer_config(void)
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{
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/* ----------------------------------------------------------------------------
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TIMER2 Configuration:
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TIMER2CLK = SystemCoreClock/9000 = 20KHz.
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TIMER2 configuration is timing mode, and the timing is 0.2s(4000/20000 = 0.2s).
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---------------------------------------------------------------------------- */
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timer_parameter_struct timer_initpara;
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/* enable the peripherals clock */
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rcu_timer_clock_prescaler_config(RCU_TIMER_PSC_MUL4);
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rcu_periph_clock_enable(RCU_TIMER2);
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/* deinit a TIMER */
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timer_deinit(TIMER2);
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/* initialize TIMER init parameter struct */
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timer_struct_para_init(&timer_initpara);
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/* TIMER2 configuration */
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timer_initpara.prescaler = 8999;
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timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
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timer_initpara.counterdirection = TIMER_COUNTER_UP;
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timer_initpara.period = 4000;
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timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
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timer_init(TIMER2, &timer_initpara);
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/* clear interrupt bit */
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timer_interrupt_flag_clear(TIMER2, TIMER_INT_FLAG_UP);
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/* enable the TIMER interrupt */
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timer_interrupt_enable(TIMER2, TIMER_INT_UP);
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/* enable a TIMER */
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timer_enable(TIMER2);
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}
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/*!
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\brief main function
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\param[in] none
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\param[out] none
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\retval none
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*/
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int main(void)
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{
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/* configure led GPIO */
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gd_eval_led_init(LED2);
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/* configure the TIMER peripheral */
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timer_config();
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/* configure the TIMER2 interrupt */
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nvic_config();
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while (1);
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}
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