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- /*!
- \file main.c
- \brief TIMER0 dma burst demo for gd32f30x
- \version 2017-02-10, V1.0.0, firmware for GD32F30x
- \version 2018-10-10, V1.1.0, firmware for GD32F30x
- \version 2018-12-25, V2.0.0, firmware for GD32F30x
- \version 2020-09-30, V2.1.0, firmware for GD32F30x
- */
- /*
- Copyright (c) 2020, GigaDevice Semiconductor Inc.
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- 1. Redistributions of source code must retain the above copyright notice, this
- list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- 3. Neither the name of the copyright holder nor the names of its contributors
- may be used to endorse or promote products derived from this software without
- specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- OF SUCH DAMAGE.
- */
- #include "gd32f30x.h"
- #include <stdio.h>
- #include "gd32f307c_eval.h"
- #define TIMER0_DMATB ((uint32_t)0x40012C4C)
- uint16_t buffer[8] = {99,199,299,399,499,599,699,799};
- void gpio_config(void);
- void timer_config(void);
- void dma_config(void);
- /*!
- \brief configure the GPIO ports
- \param[in] none
- \param[out] none
- \retval none
- */
- void gpio_config(void)
- {
- rcu_periph_clock_enable(RCU_GPIOA);
- rcu_periph_clock_enable(RCU_AF);
- /*configure PA8(TIMER0 CH0) as alternate function*/
- gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_8);
- /*configure PA9(TIMER0 CH1) as alternate function*/
- gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_9);
- /*configure PA10(TIMER0 CH2) as alternate function*/
- gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_10);
- /*configure PA11(TIMER0 CH3) as alternate function*/
- gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_11);
- }
- /*!
- \brief configure the DMA peripheral
- \param[in] none
- \param[out] none
- \retval none
- */
- void dma_config(void)
- {
- dma_parameter_struct dma_init_struct;
- /* enable DMA clock */
- rcu_periph_clock_enable(RCU_DMA0);
- /* initialize DMA channel4 */
- dma_deinit(DMA0,DMA_CH4);
- /* DMA channel4 initialize */
- dma_init_struct.periph_addr = (uint32_t)TIMER0_DMATB;
- dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
- dma_init_struct.memory_addr = (uint32_t)buffer;
- dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
- dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
- dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;
- dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;
- dma_init_struct.number = 8;
- dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
- dma_init(DMA0,DMA_CH4,&dma_init_struct);
- dma_circulation_enable(DMA0,DMA_CH4);
- /* enable DMA channel4 */
- dma_channel_enable(DMA0,DMA_CH4);
-
- }
- /*!
- \brief configure the TIMER peripheral
- \param[in] none
- \param[out] none
- \retval none
- */
- void timer_config(void)
- {
- /* TIMER0 DMA transfer example -------------------------------------------------
- TIMER0CLK = 120MHz, prescaler = 119
- TIMER0 counter clock = systemcoreclock/120 = 1MHz.
- The objective is to configure TIMER0 channel 0~3(PA8~PA11) to generate PWM signal.
- capture compare register 0~3 are to be updated twice per circle.On the first update
- DMA request, data1 is transferred to CH0CV, data2 is transferred to CH1CV, data3 is
- transferred to CH2CV,data4 is transferred to CH3CV and duty cycle(10%,20%,30%,40%).
- On the second update DMA request, data5 is transferred to CH0CV, data6 is transferred
- to CH1CV, data7 is transferred to CH2CV,data8 is transferred to CH3CV and duty cycle
- (50%,60%,70%,80%).
- -----------------------------------------------------------------------------*/
- timer_oc_parameter_struct timer_ocintpara;
- timer_parameter_struct timer_initpara;
- rcu_periph_clock_enable(RCU_TIMER0);
- timer_deinit(TIMER0);
- /* TIMER0 configuration */
- timer_initpara.prescaler = 119;
- timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
- timer_initpara.counterdirection = TIMER_COUNTER_UP;
- timer_initpara.period = 999;
- timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
- timer_initpara.repetitioncounter = 0;
- timer_init(TIMER0,&timer_initpara);
- timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
- timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
- timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
- timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
- timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_HIGH;
- timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
- timer_channel_output_config(TIMER0,TIMER_CH_0,&timer_ocintpara);
- timer_channel_output_config(TIMER0,TIMER_CH_1,&timer_ocintpara);
- timer_channel_output_config(TIMER0,TIMER_CH_2,&timer_ocintpara);
- timer_channel_output_config(TIMER0,TIMER_CH_3,&timer_ocintpara);
- /* CH0 configuration in PWM0 mode */
- timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,buffer[0]);
- timer_channel_output_mode_config(TIMER0,TIMER_CH_0,TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER0,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);
- /* CH1 configuration in PWM0 mode */
- timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_1,buffer[0]);
- timer_channel_output_mode_config(TIMER0,TIMER_CH_1,TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER0,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);
- /* CH2 configuration in PWM0 mode */
- timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_2,buffer[0]);
- timer_channel_output_mode_config(TIMER0,TIMER_CH_2,TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER0,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);
- /* CH3 configuration in PWM0 mode */
- timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_3,buffer[0]);
- timer_channel_output_mode_config(TIMER0,TIMER_CH_3,TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER0,TIMER_CH_3,TIMER_OC_SHADOW_DISABLE);
- /* TIMER0 primary output enable */
- timer_primary_output_config(TIMER0,ENABLE);
- /* TIMER0 update DMA request enable */
- timer_dma_transfer_config(TIMER0,TIMER_DMACFG_DMATA_CH0CV,TIMER_DMACFG_DMATC_4TRANSFER);
- timer_dma_enable(TIMER0,TIMER_DMA_UPD);
- /* auto-reload preload enable */
- timer_auto_reload_shadow_enable(TIMER0);
- /* TIMER0 counter enable */
- timer_enable(TIMER0);
- }
- /*!
- \brief main function
- \param[in] none
- \param[out] none
- \retval none
- */
- int main(void)
- {
- gpio_config();
- dma_config();
- timer_config();
- while (1);
- }
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