Storage system lighting sorting

In the storage system , In order to improve the efficiency of manual picking , Many enterprises have added the light picking function in the warehouse , That is, add light guidance on the existing shelves , The operator selects materials on the corresponding shelf according to the light . Now, the light guide signs installed on the warehouse location in the market are generally specially made equipment , The function fully meets the requirements , But the price is generally high . Combined with the current market WS2812 The application of light band is widespread , use WS2812 Make a light picking Guide , Meet the requirements in function , The effect is better than the existing , The cost is lower than now .
1： System diagram
The core controller is stm32 Series of microcontrollers , Later, it can be replaced by domestic single chip computers .
signal communication , In order to adapt to a variety of scenarios , Currently implemented support 485 signal communication ,232 Communication and network port communication .
Light strip selection WS2812B The lamp strip of the wick , The length of the light strip is determined according to the actual location , The length supported by the controller can be set freely .
Power supply , Considering the convenience of on-site implementation , The power supply range of the equipment ranges from 5V~24V.
2： Communication protocol and program processing
The communication protocol uses its own protocol , After the hardware interface is determined in the hardware layer ,WMS The system needs to send data in the format of the Protocol , After the controller receives the data , Normal inspection , Feed back the same frame data to WMS System , At the same time, start to light up ; Abnormal inspection , Set the corresponding exception code at the exception position , Then give feedback to WMS System , Do not perform light .
The communication protocol is defined as follows
Send the following instructions to the main control board from the communication interface
The meaning of this instruction is as follows ：
AA : Indicates the beginning of the frame
00 15 : from 21 Start with a light
00 05： bright 5 Lights
00 ： Wait for the order to turn off the light
00 00 30 ： The light is blue 30
00 00 00 ： Off color
00 ： Normal frame
00 00 : crc test , This frame is for the convenience of testing , Left check .
BB： End of the frame
Actual test board function test , Use serial port to test , The data sent from the serial port is shown in the figure
In this picture , Three light guidance frames have been sent , The actual guidance light is shown in the figure below ：
First frame command ： from 1 The light starts 5 The light is green ;
Second frame command ： from 11 The light starts 5 The lights are red ;
The third frame command ： from 21 The light starts 5 Lights are blue .
The serial port communication receiving data of the control board is executed in the serial port interrupt , Analyze every character received , The receiving procedure is as follows

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    
	UNUSED(huart);
	if(huart == &huart1)
	{
    	
		// Receive status identification ,0： Wait for the agreement header ;1： Protocol receiving ;2: Protocol reception completed , To be processed .
		switch(recv_flag)
		{
    
			case 0:
				recv_overtime:
				if(recv == 0xAA){
    
					recv_delay = RECV_DELAY;
					recv_flag = 1;
					recv_length = 0;
					recv_buff[recv_length]=recv;
					recv_length ++;
				}
				break;
			case 1:
				if(RECV_DELAY == 0){
    
					// Receive inter character delay timeout 
					recv_flag = 0;
					goto recv_overtime;
				}
				recv_delay = RECV_DELAY;
				recv_buff[recv_length]=recv;
				recv_length ++;
				if(recv_length == 16){
    
					if(recv == 0xBB){
    
						recv_flag = 2;
					}else{
    
						recv_flag = 0;
					}
				}
				break;
			default:
				break;
		}	
			
		HAL_UART_Receive_IT(&huart1, (uint8_t *)&recv, 1);
	}
}

After receiving, process the data in the main program , The procedure is as follows ：

		// Cancel the display function after timeout in the Protocol 
		WS_ClearWHLED();
		// Data received , To be processed 
		if(recv_flag == 2)
		{
    
			//RC522_Test(recv_flag);
			if(spisend_flag == 0)
			{
    	
				// Display data analysis and processing 
				WS_CreateWHLED();
				HAL_IWDG_Refresh(&hiwdg);
				// The received data is replied to the sender 
				for(i = 0; i < 16; i++)
				{
    
					send_buff[i]= recv_buff[i];
				}
				HAL_UART_Transmit(&huart1,send_buff,16,0xFFFF);	
				recv_flag = 0;
			}
		}

Specific data processing

void WS_CreateWHLED()
{
    
	int i;
	U16 pt, len;
	// Timeout automatically cancels the display 
	if(recv_buff[5] != 0)
	{
    
		led_flag = 1;
		led_delay1s = recv_buff[5] + 1;
	}
	else
		led_flag = 0;
	
	pt = (recv_buff[1] << 8) + recv_buff[2] - 1;
	len = (recv_buff[3] << 8) + recv_buff[4];
	
	if((0 <= pt) && (pt < LEDNUMB))
	{
    
		if((pt + len) > LEDNUMB)
			len = LEDNUMB - pt;
		
		for(i = 0; i < len; i++)
		{
    
			ledGRB[3*pt + 3*i]     = recv_buff[6];
			ledGRB[3*pt + 3*i + 1] = recv_buff[7];
			ledGRB[3*pt + 3*i + 2] = recv_buff[8];
		}
	}
	//WS2812B Show 
	WS_led();
}

void WS_ClearWHLED()
{
    
	int i;
	I16 pt;
	U16 len;
	
	if(led_flag == 1)
	{
    
		if(led_delay1s == 0)
		{
    
			led_flag = 0;
			
			pt = (recv_buff[1] << 8) + recv_buff[2] - 1;
			len = (recv_buff[3] << 8) + recv_buff[4];
			
			if((0 <= pt) && (pt < LEDNUMB))
			{
    
				if((pt + len) > LEDNUMB)
					len = LEDNUMB - pt;
				
				for(i = 0; i < len; i++)
				{
    
					ledGRB[3*pt + 3*i]     = recv_buff[9];
					ledGRB[3*pt + 3*i + 1] = recv_buff[10];
					ledGRB[3*pt + 3*i + 2] = recv_buff[11];
				}
			}
			
			WS_led();
		}
	}
}

3：WS2812B data display
WS2812B Refer to the manual for data transmission waveform , In this procedure SPI + DMA Interrupt mode to implement the interface .WS2812 One bit of is used spi One of the byte simulation .
The parameter configuration is as follows

WS2812 Bit value 1 yes SPI Corresponding byte Value 0XF8, Position as 0 Is the corresponding value 0XC0.
WS2812 By bit conversion spi Function of

U8 WS_code[2] = {
    0XC0, 0XF8};
void WS_GetData(U8 *data, U16 len)
{
    
	int i, j, k = 0;
	for(i = 0; i < len; i++)
	{
    
		for(j = 7; j >= 0; j--)
		{
    
			senddata[k] = WS_code[(data[i] >> j) & 0x01];
			k ++;
		}
	}
}
void WS_led()
{
    
	WS_GetData(ledGRB, GRBNUMB);
	//SPI_Send(senddata, SENDLen); 
	//SPI_Send_IT(senddata, SENDLen); 
	SPI_SendDMA_IT(senddata, SENDLen); 
}
void SPI_SendDMA_IT(U8 *pData, U16 Size)
{
    	 
	spisend_flag = 1;
	HAL_SPI_Transmit_DMA(&hspi1, senddata, SENDLen);
}
//spi Interrupt after sending 
void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi)
{
    
	UNUSED(hspi);
	if(hspi == &hspi1)
	{
    	
		spisend_flag = 0;
		HAL_SPI_DMAStop(hspi);
	}
}

thus , Complete the function of receiving data and lighting .

Last , Installation implementation and use effect , The scheme is superior to the existing special equipment on the market in light indication ; The disadvantage is that after the operator finishes sorting , Feedback results , Special equipment claps the lamp directly ( Key ) feedback , The scheme needs to be in PDA Feedback .