181 lines
3.5 KiB
C
181 lines
3.5 KiB
C
#include "sys.h"
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#include "usart.h"
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#include "delay.h"
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#include "led.h"
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#include "key.h"
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#include "LCD.h"
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#include "Dis_Picture.h"
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#include "Text.h"
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#include "GBK_LibDrive.h"
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#include "mpu.h"
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#include "dma.h"
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/*********************************************************************/
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//DMA 实验
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//STM32H7工程模板-HAL库函数版本
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//DevEBox 大越创新
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//淘宝店铺：mcudev.taobao.com
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//淘宝店铺：shop389957290.taobao.com
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/*********************************************************************/
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#define SEND_BUF_SIZE 7800 //发送数据长度,最好等于sizeof(TEXT_TO_SEND)+2的整数倍.
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u8 SendBuff[SEND_BUF_SIZE]; //发送数据缓冲区
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const u8 TEXT_TO_SEND[]={" mcudev.taobao.com STM32H7XXX DMA 串口实验 "};
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u16 i;
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u8 t=0;
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u8 j,mask=0;
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float pro=0;
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u8 tbuf[32];
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int main(void)
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{
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Cache_Enable(); //打开L1-Cache
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Stm32_Clock_Init(160,5,2,4); //设置时钟,400Mhz
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HAL_Init(); //初始化HAL库
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delay_init(400); //延时初始化
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uart_init(115200); //串口初始化
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LED_Init(); //初始化LED时钟
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KEY_Init();
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MPU_Memory_Protection(); //保护相关存储区域
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LCD_Init(); //初始化2.0寸 240x320 高清屏 LCD显示
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GBK_Lib_Init(); //硬件GBK字库初始化--(如果使用不带字库的液晶屏版本，此处可以屏蔽，不做字库初始化）
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LCD_Clear(WHITE); //清屏
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MYDMA_Config(DMA2_Stream7); //初始化DMA
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Draw_Font16B(16,16,RED," STM32H7 DMA ");
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Draw_Font16B(16,32,BLUE," 嵌入式开发网 ");
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Draw_Font16B(16,48,BLUE,"mcudev.taobao.com");
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Draw_Font24B(16,64,RED, "KEY2:Start");
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//显示提示信息
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j=sizeof(TEXT_TO_SEND);
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for(i=0;i<SEND_BUF_SIZE;i++)//填充ASCII字符集数据
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{
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if(t>=j)//加入换行符
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{
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if(mask)
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{
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SendBuff[i]=0x0a;
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t=0;
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}else
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{
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SendBuff[i]=0x0d;
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mask++;
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}
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}
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else//复制TEXT_TO_SEND语句
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{
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mask=0;
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SendBuff[i]=TEXT_TO_SEND[t];
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t++;
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}
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}
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POINT_COLOR=BLUE;//设置字体为蓝色
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i=0;
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while(1)
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{
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t=KEY_Scan(0);
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if(t==KEY2_PRES)//KEY0按下
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{
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printf("\r\nDMA DATA:\r\n");
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Draw_Font24B(8,90,RED, "Start Transimit.. ");
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Draw_Font24B(8,120,RED," % ");//显示百分号
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HAL_UART_Transmit_DMA(&UART1_Handler,SendBuff,SEND_BUF_SIZE);//开启DMA传输
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//使能串口1的DMA发送等待DMA传输完成，此时我们来做另外一些事，点灯
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//实际应用中，传输数据期间，可以执行另外的任务
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while(1)
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{
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if(__HAL_DMA_GET_FLAG(&UART1TxDMA_Handler,DMA_FLAG_TCIF3_7))//等待DMA2_Steam7传输完成
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{
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__HAL_DMA_CLEAR_FLAG(&UART1TxDMA_Handler,DMA_FLAG_TCIF3_7);//清除DMA2_Steam7传输完成标志
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HAL_UART_DMAStop(&UART1_Handler); //传输完成以后关闭串口DMA
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break;
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}
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pro=__HAL_DMA_GET_COUNTER(&UART1TxDMA_Handler);//得到当前还剩余多少个数据
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pro=1-pro/SEND_BUF_SIZE; //得到百分比
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pro*=100; //扩大100倍
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sprintf((char*)tbuf,"%5.2f % ",pro); //显示无符号十进制整数
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Draw_Font24B(16,120,RED, tbuf);//显示百分号//显示100%
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}
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Draw_Font24B(8,120,RED, "100% ");//显示百分号//显示100%
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Draw_Font24B(8,90, RED, "Transimit Finished!");//提示传送完成
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}
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i++;
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delay_ms(10);
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if(i==20)
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{
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LED2_Toggle;//提示系统正在运行
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i=0;
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}
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}
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}
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/*********************************************************************/
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//DMA 实验
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//STM32H7工程模板-HAL库函数版本
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//DevEBox 大越创新
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//淘宝店铺：mcudev.taobao.com
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//淘宝店铺：shop389957290.taobao.com
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/*********************************************************************/
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