CW32的步进电机和WS2812驱动：以制作简易旋转展台为例 |
您所在的位置：网站首页 › eg2131驱动 › CW32的步进电机和WS2812驱动：以制作简易旋转展台为例 |
CW32的步进电机和WS2812驱动：以制作简易旋转展台为例
|
前言
用国产CW32F030C8T6单片机做个旋转展示台玩玩。具体硬件设计请移步【CW32】基于CW32F030的旋转展示台 - 嘉立创EDA开源硬件平台 (oshwhub.com) 一、步进电机驱动这里以四拍驱动5V步进电机为例。首先初始化一个基本定时器（BTIM），不过定时器的频率需要根据调试结果合理选择。 void BTIM_configuration(void){ BTIM_TimeBaseInitStruct.BTIM_Mode = BTIM_Mode_TIMER; BTIM_TimeBaseInitStruct.BTIM_Period = 7000-1; BTIM_TimeBaseInitStruct.BTIM_Prescaler = BTIM_PRS_DIV16; BTIM_TimeBaseInitStruct.BTIM_OPMode=BTIM_OPMode_Repetitive; BTIM_TimeBaseInit(CW_BTIM1, &BTIM_TimeBaseInitStruct); BTIM_ITConfig(CW_BTIM1, BTIM_IT_OV, ENABLE); BTIM_Cmd(CW_BTIM1, ENABLE); }然后找4个IO端口给脉冲信号。如果有条件的话，可以分配相邻编号的4个管脚连到ULN2003驱动步进电机。那么，每一步的话，直接改BSRR寄存器一行完成。
这里的代码还考虑了正反转两种情况，根据motor_direction切换驱动模式。 二、WS2812驱动用STM32+ws2812灯条，点灯升级版_stm32 ws2812_哆啦哆小魔仙的博客-CSDN博客的代码，不过要根据CW32的实际情况改一下配置。为了分出7MHz时钟，CW32F030主频配成56MHz。 然后参考例程配置SPI和DMA。一些宏定义可以在文章最后的main.h找到。 void SPI_Configuration() { SPI_InitTypeDef SPI_InitStructure; SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; // 双线全双工 SPI_InitStructure.SPI_Mode = SPI_Mode_Master; // 主机模式 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; // 帧数据长度为8bit SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // 时钟空闲电平为低 SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // 第一个边沿采样 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; // 片选信号由SSI寄存器控制 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; // 波特率为PCLK的4分频 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; // 最高有效位 MSB 收发在前 SPI_InitStructure.SPI_Speed = SPI_Speed_High; // 高速SPI SPI_Init(SPIx, &SPI_InitStructure); SPI_Cmd(SPIx, ENABLE); } void DMA_Configuration(void) { DMA_InitTypeDef DMA_InitStructure; //初始化SPI DMA TX DMA_InitStructure.DMA_Mode = DMA_MODE_BLOCK; DMA_InitStructure.DMA_TransferWidth = DMA_TRANSFER_WIDTH_8BIT; DMA_InitStructure.DMA_SrcInc = DMA_SrcAddress_Increase; DMA_InitStructure.DMA_DstInc = DMA_DstAddress_Fix; DMA_InitStructure.TrigMode = DMA_HardTrig; DMA_InitStructure.HardTrigSource = SPIx_DMA_TxTrigSource; DMA_InitStructure.DMA_TransferCnt = 24*PIXEL_NUM; DMA_InitStructure.DMA_SrcAddress = (uint32_t)pixelBuffer; DMA_InitStructure.DMA_DstAddress = (uint32_t)&SPIx->DR; DMA_Init(SPIx_TX_DMACHANNEL, &DMA_InitStructure); DMA_Cmd(SPIx_TX_DMACHANNEL, ENABLE); } 总结如果会用STM32，使用CW32是一件不困难的事情。当然了，一些端口的名称会和STM32有些小的区别，写代码时对着例程写，那就没有问题了。 最后附上main.h /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.h * @brief : Header for main.c file. * This file contains the common defines of the application. ****************************************************************************** * @attention * * © Copyright (c) 2021 CW. * All rights reserved. * * ****************************************************************************** */ /* USER CODE END Header */ /* Define to prevent recursive inclusion -------------------------------------*/ #ifndef __MAIN_H #define __MAIN_H #ifdef __cplusplus extern "C" { #endif /* Includes ------------------------------------------------------------------*/ #include "base_types.h" #include "cw32f030.h" #include "system_cw32f030.h" #include "interrupts_cw32f030.h" #include "cw32f030_gtim.h" #include "cw32f030_gpio.h" #include "cw32f030_rcc.h" #include "cw32f030_flash.h" #include "cw32f030_spi.h" #include "cw32f030_dma.h" #include "cw32f030_btim.h" #include "cw32f030_uart.h" #include "ws2812.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Exported types ------------------------------------------------------------*/ /* USER CODE BEGIN ET */ /* USER CODE END ET */ /* Exported constants --------------------------------------------------------*/ /* USER CODE BEGIN EC */ /* USER CODE END EC */ /* Exported macro ------------------------------------------------------------*/ /* USER CODE BEGIN EM */ /* USER CODE END EM */ /* Exported functions prototypes ---------------------------------------------*/ /* USER CODE BEGIN EFP */ void DMA_Configuration(void); void BTIM_configuration(void); void USART_SendString(UART_TypeDef* USARTx, char *String); void keyPress_BTIM_config(void); /* USER CODE END EFP */ /* Private defines -----------------------------------------------------------*/ /* USER CODE BEGIN Private defines */ #define SPI_MASTER //???? //#define SPI_SLAVE //???? //SPI #define SPIx CW_SPI2 #define SPIx_CLK RCC_APB1_PERIPH_SPI2 #define SPIx_APBClkENx RCC_APBPeriphClk_Enable1 //SPI GPIO #define SPIx_SCK_GPIO_CLK RCC_AHB_PERIPH_GPIOA #define SPIx_SCK_GPIO_PORT CW_GPIOA #define SPIx_SCK_GPIO_PIN GPIO_PIN_2 #define SPIx_SCK_AF() PA02_AFx_SPI2SCK() #define SPIx_MISO_GPIO_CLK RCC_AHB_PERIPH_GPIOA #define SPIx_MISO_GPIO_PORT CW_GPIOA #define SPIx_MISO_GPIO_PIN GPIO_PIN_0 #define SPIx_MISO_AF() PA00_AFx_SPI2MISO() #define SPIx_MOSI_GPIO_CLK RCC_AHB_PERIPH_GPIOA #define SPIx_MOSI_GPIO_PORT CW_GPIOA #define SPIx_MOSI_GPIO_PIN GPIO_PIN_1 #define SPIx_MOSI_AF() PA01_AFx_SPI2MOSI() #define SPIx_CS_GPIO_CLK RCC_AHB_PERIPH_GPIOA #define SPIx_CS_GPIO_PORT CW_GPIOA #define SPIx_CS_GPIO_PIN GPIO_PIN_3 #define SPIx_CS_AF() PA03_AFx_SPI2CS() //CS LOW or HIGH #define SPIx_CS_LOW() PA03_SETLOW() #define SPIx_CS_HIGH() PA03_SETHIGH() //DMA #define SPIx_RX_DMACHANNEL CW_DMACHANNEL1 #define SPIx_TX_DMACHANNEL CW_DMACHANNEL2 #define SPIx_DMA_RxTrigSource DMA_HardTrig_SPI2_RXBufferNE #define SPIx_DMA_TxTrigSource DMA_HardTrig_SPI2_TXBufferE #define BufferSize ARRAY_SZ(TxBuffer) #define MOTOR_PORT CW_GPIOB #define MT1 GPIO_PIN_4 #define MT2 GPIO_PIN_5 #define MT3 GPIO_PIN_6 #define MT4 GPIO_PIN_7 //UARTx #define DEBUG_USARTx CW_UART1 #define DEBUG_USART_CLK RCC_APB2_PERIPH_UART1 #define DEBUG_USART_APBClkENx RCC_APBPeriphClk_Enable2 #define DEBUG_USART_BaudRate 9600 #define DEBUG_USART_UclkFreq 32800 //UARTx GPIO #define DEBUG_USART_GPIO_CLK RCC_AHB_PERIPH_GPIOA #define DEBUG_USART_TX_GPIO_PORT CW_GPIOA #define DEBUG_USART_TX_GPIO_PIN GPIO_PIN_8 #define DEBUG_USART_RX_GPIO_PORT CW_GPIOA #define DEBUG_USART_RX_GPIO_PIN GPIO_PIN_9 //GPIO AF #define DEBUG_USART_AFTX PA08_AFx_UART1TXD() #define DEBUG_USART_AFRX PA09_AFx_UART1RXD() //GPIO INPUT #define USR_SW_PORT CW_GPIOB #define USR_SW1_PIN GPIO_PIN_10 #define USR_SW2_PIN GPIO_PIN_2 #define USR_SW3_PIN GPIO_PIN_1 #define USR_SW4_PIN GPIO_PIN_0 //?? #define DEBUG_USART_IRQ UART1_IRQn /* USER CODE END Private defines */ #ifdef __cplusplus } #endif #endif /* __MAIN_H */ /************************ (C) COPYRIGHT CW *****END OF FILE****/ |
【本文地址】
今日新闻 |
推荐新闻 |