- #include "gd32f1x0.h"
- #include "systick.h"
- #include "stdio.h"
- #include "stdlib.h"
- #define num 4
- #define TIMER1_CH1CV_VALUE (0x40000038U)
- uint16_t RGB_buffer[45+num*24]={0};
- /*****************************************************************************
- 文件: main.c
- 作者: Zhengyu https://gzwelink.taobao.com
- 版本: V1.0.0
- 时间: 20210401
- 平台:MINI-GD32F130C8T6开发板
- 微信号:gzwelink
- *******************************************************************************/
- void delay(int time)
- {
- while(time--);
-
- return;
- }
- void gpio_config(void)
- {
- rcu_periph_clock_enable(RCU_GPIOB);//GPIOB时钟使能
- gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_3);//PB3作为备用功能脚
- gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_3);//PB3配成输出
- gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_10);
- gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10);
- gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_11);
- gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_11);
- gpio_bit_reset(GPIOB,GPIO_PIN_10);
- gpio_af_set(GPIOB, GPIO_AF_2, GPIO_PIN_3);//PB3功能选择TIMER1_CH1
- gpio_af_set(GPIOB, GPIO_AF_2, GPIO_PIN_10);
- gpio_af_set(GPIOB, GPIO_AF_2, GPIO_PIN_11);
- }
- void timer_config(void)
- {
- /* -----------------------------------------------------------------------
- TIMER1 配置:产生3个不同的PWM信号:
- TIMER1CLK = SystemCoreClock / 6*10 = 8KHz
- TIMER1 channel 2 duty cycle = 50%
- ----------------------------------------------------------------------- */
- /*定时器输出通道参数设置结构体*/
- timer_oc_parameter_struct timer_ocintpara;
- /*定时器参数设置结构体*/
- timer_parameter_struct timer_initpara;
- //开启定时器1时钟
- rcu_periph_clock_enable(RCU_TIMER1);
- //定时器1初始化
- timer_deinit(TIMER1);
- ///////////////////////////////以下配置成定时器1.25us，PWM就是800KHZ 48M/6*10///////////////////////////
- /* TIMER1 configuration */
- timer_initpara.prescaler = 5; //预分频值
- timer_initpara.alignedmode = TIMER_COUNTER_EDGE;//对齐模式：边沿对齐
- timer_initpara.counterdirection = TIMER_COUNTER_UP;//技术模式：向上计数
- timer_initpara.period = 9;//计数值
- timer_initpara.clockdivision = TIMER_CKDIV_DIV1; //时钟分频值1
- timer_initpara.repetitioncounter = 0; //计数器重赋值0
- //配置定时器1
- timer_init(TIMER1,&timer_initpara);
- /////////////////////////////////////////////////////////////////////////////////////////////////////////
- /* CH1, CH2 and CH3 configuration in PWM0 mode */
- timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;//通道输出极性高
- timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;//通道输出互补极性高
- timer_ocintpara.outputstate = TIMER_CCX_ENABLE; //通道输出状态使能
- timer_ocintpara.outputnstate = TIMER_CCXN_ENABLE; //通道互补使能
- timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_HIGH;//通道输出的空闲状态为高
- timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; //通道互补输出的空闲状态为低
- timer_channel_output_config(TIMER1, TIMER_CH_1, &timer_ocintpara);
- timer_channel_output_config(TIMER1, TIMER_CH_2, &timer_ocintpara);
- timer_channel_output_config(TIMER1, TIMER_CH_3, &timer_ocintpara);
- timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 0);//配置定时器1通道1 PWM 占空比
- timer_channel_output_mode_config(TIMER1, TIMER_CH_1, TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER1, TIMER_CH_1, TIMER_OC_SHADOW_ENABLE);
- timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 0);
- timer_channel_output_mode_config(TIMER1, TIMER_CH_2, TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER1, TIMER_CH_2, TIMER_OC_SHADOW_ENABLE);
- timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_3, 0);
- timer_channel_output_mode_config(TIMER1, TIMER_CH_3, TIMER_OC_MODE_PWM0);
- timer_channel_output_shadow_config(TIMER1, TIMER_CH_3, TIMER_OC_SHADOW_ENABLE);
- /*定时器主输出使能*/
- timer_primary_output_config(TIMER1, ENABLE);
- /*定时器1通道1 DMA请求使能*/
- timer_dma_enable(TIMER1, TIMER_DMA_CH1D);
- /* auto-reload preload enable */
- //timer_auto_reload_shadow_enable(TIMER1);//自动重装载影子比较器使能
- timer_auto_reload_shadow_disable(TIMER1);//自动重装载影子比较器使能
- /* auto-reload preload enable */
- timer_enable(TIMER1);//定时器1使能
- }
- void dma_config(void)
- {
- /*parameter:参数*/
- //dma_parameter_struct dma_struct;
- /* 开启 DMA 时钟 */
- rcu_periph_clock_enable(RCU_DMA);
- /* DMA 初始化 */
- dma_deinit(DMA_CH1);
- /*配置DMA*/
- //外设基地址
- dma_periph_address_config(DMA_CH1,(uint32_t)TIMER1_CH1CV_VALUE);
- //外设传输数据宽度
- dma_periph_width_config(DMA_CH1,DMA_PERIPHERAL_WIDTH_16BIT);
- //外设基地址增量禁止
- dma_periph_increase_disable(DMA_CH1);
- //存储器基地址
- dma_memory_address_config(DMA_CH1,(uint32_t)(&RGB_buffer));
- //存储器传输数据宽度
- dma_memory_width_config(DMA_CH1,DMA_PERIPHERAL_WIDTH_16BIT);
- //存储器地址增量使能
- dma_memory_increase_enable(DMA_CH1);
- //传输模式：存储器到外设
- dma_transfer_direction_config(DMA_CH1,DMA_MEMORY_TO_PERIPHERAL);
- //传输数据长度
- dma_transfer_number_config(DMA_CH1,sizeof(RGB_buffer));
- //DMA中断优先级为高
- dma_priority_config(DMA_CH1,DMA_PRIORITY_MEDIUM);
- //禁止循环模式
- dma_circulation_disable(DMA_CH1);
- //禁止存储器到存储器模式
- dma_memory_to_memory_disable(DMA_CH1);
- /* 使能 DMA 通道1 */
- dma_channel_enable(DMA_CH1);
- }
- void setRGB(uint8_t red,uint8_t green,uint8_t blue)
- {
- uint8_t i = 0,j =0;
- uint32_t rgb_value = green<<16 | red<<8 | blue;
- //while(dma_flag_get(DMA_CH1, DMA_INTF_FTFIF)==RESET);
- dma_flag_clear(DMA_CH1,DMA_INTFC_FTFIFC);
-
- dma_channel_disable(DMA_CH1);
-
- dma_transfer_number_config(DMA_CH1,sizeof(RGB_buffer));
- //timer_dma_transfer_config(TIMER1, TIMER_CH_1,TIMER_DMACFG_DMATA_CH1CV);
- for(j=1;j<=num;++j)
- {
- for(i=0;i<24;++i)
- {
- if((rgb_value<<i)&0x800000) //高位先发，此时高位为1时
- {
- RGB_buffer[i+45] = 7; //68%占空比
- }
- else
- {
- RGB_buffer[i+45] = 3; //32%占空比
- }
- }
- }
-
- dma_channel_enable(DMA_CH1);
- }
- int main(void)
- {
- rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV1);//设置主频48M(#define __SYSTEM_CLOCK_72M_PLL_HXTAL (uint32_t)(72000000)),8M外部晶振 (#define HXTAL_VALUE ((uint32_t)8000000))
- systick_config();//配置1ms SysTick
- gpio_config();//PB3配置成定时器1通道1
- timer_config();
- delay_1ms(1);
- //timer_config();//800kHZ PWM波输出配置
- dma_config();
-
- while(1)
- {
- setRGB(200,0,0);
- }
- }
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