148 lines
5.5 KiB
C
148 lines
5.5 KiB
C
/*!
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\file main.c
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\brief TIMER1 single pulse 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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void gpio_config(void);
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void timer_config(void);
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/*!
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\brief configure the GPIO ports
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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 gpio_config(void)
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{
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rcu_periph_clock_enable(RCU_GPIOA);
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/*configure PA0 PA1(TIMER1 CH0 CH1) as alternate function*/
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_0);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_166MHZ,GPIO_PIN_0);
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gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_0);
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gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_1);
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gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_166MHZ,GPIO_PIN_1);
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gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_1);
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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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TIMER1 configuration: single pulse mode
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the external signal is connected to TIMER1 CH0 pin (PA0) and the falling
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edge is used as active edge.
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the single pulse signal is output on TIMER1 CH1 pin (PA1).
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the TIMER1CLK frequency is set to systemcoreclock,the prescaler is
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90,so the TIMER1 counter clock is 2MHz.
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single pulse value = (TIMER1_Period - TIMER1_Pulse) / TIMER1 counter clock
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= (65535 - 11535) / 2MHz = 27 ms.
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----------------------------------------------------------------------- */
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timer_oc_parameter_struct timer_ocinitpara;
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timer_parameter_struct timer_initpara;
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timer_ic_parameter_struct timer_icinitpara;
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rcu_timer_clock_prescaler_config(RCU_TIMER_PSC_MUL4);
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rcu_periph_clock_enable(RCU_TIMER1);
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timer_deinit(TIMER1);
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/* TIMER1 configuration */
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timer_initpara.prescaler = 89;
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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 = 65535;
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timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
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timer_initpara.repetitioncounter = 0;
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timer_init(TIMER1,&timer_initpara);
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/* auto-reload preload disable */
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timer_auto_reload_shadow_disable(TIMER1);
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/* CH1 configuration in OC PWM mode */
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timer_ocinitpara.outputstate = TIMER_CCX_ENABLE;
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timer_ocinitpara.outputnstate = TIMER_CCXN_DISABLE;
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timer_ocinitpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
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timer_ocinitpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
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timer_ocinitpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
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timer_ocinitpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
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timer_channel_output_config(TIMER1,TIMER_CH_1,&timer_ocinitpara);
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timer_channel_output_pulse_value_config(TIMER1,TIMER_CH_1,11535);
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timer_channel_output_mode_config(TIMER1,TIMER_CH_1,TIMER_OC_MODE_PWM1);
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timer_channel_output_shadow_config(TIMER1,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);
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/* TIMER1 CH0 input capture configuration */
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timer_icinitpara.icpolarity = TIMER_IC_POLARITY_FALLING;
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timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI;
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timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
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timer_icinitpara.icfilter = 0x00;
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timer_input_capture_config(TIMER1,TIMER_CH_0,&timer_icinitpara);
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/* single pulse mode selection */
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timer_single_pulse_mode_config(TIMER1,TIMER_SP_MODE_SINGLE);
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/* slave mode selection : TIMER1 */
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/* TIMER1 input trigger : external trigger connected to CI0 */
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timer_input_trigger_source_select(TIMER1,TIMER_SMCFG_TRGSEL_CI0FE0);
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timer_slave_mode_select(TIMER1,TIMER_SLAVE_MODE_EVENT);
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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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gpio_config();
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timer_config();
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while (1);
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}
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