山外多功能调试助手用作MM32虚拟示波器

硬件：MM32L373
开发工具：IAR7.8
调试工具：山外多功能调试助手

Introduction

在调试MM32芯片的过程中，有时需要观察数据的实时变化，山外多功能调试助手中的虚拟示波器可以实现这一功能。

山外虚拟示波器的特点：

• 支持8个通道，且通道可隐藏
• 可选择通道数据类型
• 界面可缩放移动
• 可追踪最新数据

山外虚拟示波器通信协议：

具体可阅读山外调试助手使用说明

Solution: Output Triangle Wave

以下代码参考了「顶点元」STM32使用虚拟示波器

1. 配置UART

   void initUART1_IT(u32 baudrate)
   {
       UART_InitTypeDef pUARTInit;
   
       COMMON_EnableIpClock(emCLOCK_UART1);
       COMMON_NVIC_Configure(UART1_IRQn, 1, 1);
      
       UART_StructInit(&pUARTInit);
       pUARTInit.BaudRate      = baudrate;
       pUARTInit.WordLength    = UART_WordLength_8b;
       pUARTInit.StopBits      = UART_StopBits_1;
       pUARTInit.Parity        = UART_Parity_No;
       pUARTInit.Mode          = UART_Mode_Rx | UART_Mode_Tx;
       pUARTInit.HWFlowControl = UART_HWFlowControl_None;
       UART_Init(UART1, &pUARTInit);
      
       UART_ITConfig(UART1, UART_IT_RXIEN, ENABLE);
       UART_ClearITPendingBit(UART1, UART_IT_RXIEN);
       UART_Cmd(UART1, ENABLE);
      
       BSP_UART_GPIO_CONFIGURE(UART1);
   }
   

2. 发送一个字节的数据

   void usart1_send_char(uint8_t ch)
   {
       while (UART_GetFlagStatus(UART1, UART_IT_TXIEN) == RESET);
       UART_ClearITPendingBit(UART1, UART_IT_TXIEN);
       UART_SendData(UART1, (uint8_t)ch);
   }
   

3. 发送一个数组

   数组长度即为通道个数

   void usart1_putbuff (uint8_t *buff, uint32_t len)
   {
       while(len--)
       {
            usart1_send_char(*buff);
            buff++;
       }
   }
   

4. 根据通信协议向上位机发送数据

   void vcan_sendware(uint8_t *wareaddr, uint32_t waresize)
   { 
       uint8_t cmdf[2] = {0x03, 0xfc};
       uint8_t cmdr[2] = {0xfc, 0x03};
      
       usart1_putbuff(cmdf,sizeof(cmdf));
       usart1_putbuff(wareaddr,waresize);
       usart1_putbuff(cmdr,sizeof(cmdr));
   }
   

5. 输出三角波

   void main(void)
   {   
       float warebuf[8] =  {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
       MCUID = SetSystemClock(emSYSTICK_On, AppTaskTick);
       initUART1_IT(115200);
       while(1)
       {
           warebuf[0] += 5;
           vcan_sendware((uint8_t *)warebuf,sizeof(warebuf));
           for(int i = 0; i < 100000; i++){}
           if(warebuf[0] >= 0x50){
               warebuf[0] = 0x00;
           }
       }
   }
   

6. 虚拟示波器显示

   

Solution: Output ADC Wave

1. UART配置、发送部分同上

2. 配置ADC

   void Set_ADC_Clock(ADC_TypeDef* ADCx)
   {
       if (ADCx == ADC1)	COMMON_EnableIpClock(emCLOCK_ADC1);
   }
   
   void ADC_Configure_Init(ADC_TypeDef* ADCx)
   {
   	ADC_InitTypeDef ADC_InitStructure;
       ADC_InitStructure.ADC_Resolution         = ADC_Resolution_12b;
       ADC_InitStructure.ADC_PRESCARE           = ADC_PCLK2_PRESCARE_8;
       ADC_InitStructure.ADC_Mode               = ADC_CR_CONTINUE;
       ADC_InitStructure.ADC_ExternalTrigConv = 0;
       ADC_InitStructure.ADC_DataAlign          = ADC_DataAlign_Right;
       Set_ADC_Clock(ADCx);
       ADC_Init(ADCx, &ADC_InitStructure); 
   }  
   
   void ADC_Function(ADC_TypeDef* ADCx)
   {
       ADC_ExternalTrigConvCmd(ADCx, DISABLE);
   }
   
   void ADC_RegularChannelConfigure(void)
   {
       u32 chs = 0 ;        
       chs |= LEFT_SHIFT_BIT(0) | LEFT_SHIFT_BIT(1) | LEFT_SHIFT_BIT(2) | LEFT_SHIFT_BIT(3);
       ADC1->CFGR &= ~ADC_CFGR_SAMCTL;
       ADC1->CFGR |=  ADC_Samctl_13_5;
       ADC1->CHSR &= ~chs;
       ADC1->CHSR |=  chs;
      
       exADC_TempSensorVrefintCmd(chs, ENABLE);  
   }
   

3. 输出ADC电压波形

   int main(void)
   {
       MCUID = SetSystemClock(emSYSTICK_On, AppTaskTick);
   
       ADC_Configure_Init(ADC1);
       ADC_Function(ADC1);
       ADC_RegularChannelConfigure();
       ADC_Cmd(ADC1, ENABLE);
       BSP_ADC_GPIO_Configure(ADC1, 15);
      
       initUART1_IT(115200);
      
       float ADC_ConvertedValue; 
       float warebuf[8] =  {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
      
       while (1) {
           ADC_SoftwareStartConvCmd(ADC1, ENABLE);
           while(!ADC_GetFlagStatus(ADC1, ADC_IT_EOC));
           ADC_ConvertedValue = ADC_GetConversionValue(ADC1); 
           warebuf[0] = (float)ADC_ConvertedValue;
           warebuf[1] = (float)ADC_ConvertedValue*(3.3/4096);
           vcan_sendware((uint8_t *)warebuf,sizeof(warebuf));
           for(int i = 0; i < 100000; i++){}
       }
   }
   

4. 虚拟示波器显示

   

Code on Github

https://github.com/Miao-T/VirtualOscilloscope

山外多功能调试助手获取

https://download.youkuaiyun.com/download/weixin_42150654/86246725