185 lines
5.0 KiB
C
185 lines
5.0 KiB
C
/**
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******************************************************************
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* @file main.c
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* @author fire
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* @version V1.0
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* @date 2019-xx-xx
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* @brief RS485通信实验
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******************************************************************
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* @attention
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*
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* 实验平台:野火 STM32H750 开发板
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* 论坛 :http://www.firebbs.cn
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* 淘宝 :http://firestm32.taobao.com
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*
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******************************************************************
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*/
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#include "stm32h7xx.h"
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#include "main.h"
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#include "./led/bsp_led.h"
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#include "./usart/bsp_debug_usart.h"
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#include "./key/bsp_key.h"
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#include "./485/bsp_485.h"
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#include "./delay/core_delay.h"
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extern FDCAN_HandleTypeDef hfdcan;
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FDCAN_RxHeaderTypeDef RxHeader;
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uint8_t RxData[12];
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void Delay(__IO uint32_t nCount) //简单的延时函数
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{
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for(; nCount != 0; nCount--);
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}
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/**
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* @brief 主函数
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* @param 无
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* @retval 无
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*/
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int main(void)
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{
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char *pbuf;
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uint16_t len;
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/* 使能指令缓存 */
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SCB_EnableICache();
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/* 使能数据缓存 */
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SCB_EnableDCache();
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/* 系统时钟初始化成480MHz */
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SystemClock_Config();
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_485_Config();
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/* LED 端口初始化 */
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LED_GPIO_Config();
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LED_BLUE;
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/* 配置串口1为：115200 8-N-1 */
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DEBUG_USART_Config();
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/* 初始化独立按键 */
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Key_GPIO_Config();
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printf("\r\n 欢迎使用野火 STM32H750-挑战者 开发板。\r\n");
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printf("\r\n 野火 STM32H750 485通讯实验例程\r\n");
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printf("\r\n 实验步骤：\r\n");
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printf("\r\n 1.使用导线连接好两个485通讯设备\r\n");
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printf("\r\n 2.使用跳线帽连接好:5v --- C/4-5V,485-D --- PA2,485-R ---PA3 \r\n");
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printf("\r\n 3.若使用两个野火开发板进行实验，给两个开发板都下载本程序即可。\r\n");
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printf("\r\n 4.准备好后，按下其中一个开发板的KEY1键，会使用485向外发送0-255的数字 \r\n");
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printf("\r\n 5.若开发板的485接收到256个字节数据，会把数据以16进制形式打印出来。 \r\n");
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while(1)
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{
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/*按一次按键发送一次数据*/
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if( Key_Scan(KEY1_GPIO_PORT,KEY1_PIN) == KEY_ON)
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{
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uint16_t i;
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LED_BLUE;
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_485_TX_EN();
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for(i=0;i<=0xff;i++)
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{
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_485_SendByte(i); //发送数据
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}
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/*加短暂延时，保证485发送数据完毕*/
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Delay(0xFFF);
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_485_RX_EN();
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LED_GREEN;
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printf("\r\n发送数据成功！\r\n"); //使用调试串口打印调试信息到终端
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}
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else
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{
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LED_BLUE;
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pbuf = get_rebuff(&len);
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if(len>=256)
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{
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LED_GREEN;
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printf("\r\n接收到长度为%d的数据\r\n",len);
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_485_DEBUG_ARRAY((uint8_t*)pbuf,len);
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clean_rebuff();
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}
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}
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}
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}
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/**
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* @brief System Clock 配置
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* system Clock 配置如下:
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 480000000 (CPU Clock)
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* HCLK(Hz) = 240000000 (AXI and AHBs Clock)
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* AHB Prescaler = 2
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* D1 APB3 Prescaler = 2 (APB3 Clock 120MHz)
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* D2 APB1 Prescaler = 2 (APB1 Clock 120MHz)
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* D2 APB2 Prescaler = 2 (APB2 Clock 120MHz)
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* D3 APB4 Prescaler = 2 (APB4 Clock 120MHz)
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 5
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* PLL_N = 192
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* PLL_P = 2
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* PLL_Q = 2
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* PLL_R = 2
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* VDD(V) = 3.3
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* Flash Latency(WS) = 4
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* @param None
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* @retval None
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*/
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** 启用电源配置更新
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*/
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HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
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/** 配置主内稳压器输出电压
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*/
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);
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while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
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/** 初始化CPU、AHB和、APB总线时钟
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 5;
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RCC_OscInitStruct.PLL.PLLN = 192;
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RCC_OscInitStruct.PLL.PLLP = 2;
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RCC_OscInitStruct.PLL.PLLQ = 2;
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RCC_OscInitStruct.PLL.PLLR = 2;
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RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2;
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RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
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RCC_OscInitStruct.PLL.PLLFRACN = 0;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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}
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/** 初始化CPU、AHB和、APB总线时钟
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
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|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
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RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
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{
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}
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}
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/****************************END OF FILE***************************/
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