Arduino for STM32

Posted: **Wed Sep 22, 2021 9:31 am**

This project shows how to use STONE display screen, STM32 MCU, relay module. The aim of the project is to be able to control home appliances through the STONE display as a human-computer interface.

STONE 8-inch TFT LCD

Relay module -8 channels

STM32F411 MCU core board

Connection diagram

GUI design

Source code

The STM32 uses serial port 1 and touch screen communication, the use of baud rate is 115200.

Code: Select all

void MX_USART1_UART_Init(void)
{
 
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;//
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
 
}
 
The configuration of HAL library GPIO is as follows:
 
void MX_GPIO_Init(void)
{
 
  GPIO_InitTypeDef GPIO_InitStruct = {0};
 
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
 
  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, A8_Pin|A7_Pin|A6_Pin|A5_Pin, GPIO_PIN_SET);
 
  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, A4_Pin|A3_Pin|A2_Pin|A1_Pin, GPIO_PIN_SET);
 
  /*Configure GPIO pins : PAPin PAPin PAPin PAPin */
  GPIO_InitStruct.Pin = A8_Pin|A7_Pin|A6_Pin|A5_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
  /*Configure GPIO pins : PBPin PBPin PBPin PBPin */
  GPIO_InitStruct.Pin = A4_Pin|A3_Pin|A2_Pin|A1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
}

Refresh all display states before MCU initialization

Code: Select all

data_send[4]=0x00;//
	data_send[5]=0x20;//
	data_send[6]=0xB9;//
	data_send[7]=0xD8;
	data_send[8]=0xB1;
	data_send[9]=0xD5;
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x30;//
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x40;//
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x50;//
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x60;//
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x70;//
	UART1_Send_Array(data_send,12);//
	data_send[5]=0x80;//
	UART1_Send_Array(data_send,12);//

Receive the data sent by the screen to the MCU, and control the status of IO:

Code: Select all

if ((char *)buffer != NULL) 
		{
			if (strlen((char *)buffer) == 0) 
			{
				//buffer
			}
			else//
			{
 
				switch(buffer[5])
				{
					case 0x01 : HAL_GPIO_WritePin(A1_GPIO_Port,A1_Pin,GPIO_PIN_RESET);  break;//
					case 0x02 : HAL_GPIO_WritePin(A2_GPIO_Port,A2_Pin,GPIO_PIN_RESET);  break;//
					case 0x03 : HAL_GPIO_WritePin(A3_GPIO_Port,A3_Pin,GPIO_PIN_RESET);  break;//
					case 0x04 : HAL_GPIO_WritePin(A4_GPIO_Port,A4_Pin,GPIO_PIN_RESET);  break;//
					case 0x05 : HAL_GPIO_WritePin(A5_GPIO_Port,A5_Pin,GPIO_PIN_RESET);  break;//
					case 0x06 : HAL_GPIO_WritePin(A6_GPIO_Port,A6_Pin,GPIO_PIN_RESET);  break;//
					case 0x07 : HAL_GPIO_WritePin(A7_GPIO_Port,A7_Pin,GPIO_PIN_RESET);  break;//
					case 0x11 : HAL_GPIO_WritePin(A1_GPIO_Port,A1_Pin,GPIO_PIN_SET);    break;//
					case 0x12 : HAL_GPIO_WritePin(A2_GPIO_Port,A2_Pin,GPIO_PIN_SET); 		break;//
					case 0x13 : HAL_GPIO_WritePin(A3_GPIO_Port,A3_Pin,GPIO_PIN_SET);    break;//
					case 0x14 : HAL_GPIO_WritePin(A4_GPIO_Port,A4_Pin,GPIO_PIN_SET);    break;//
					case 0x15 : HAL_GPIO_WritePin(A5_GPIO_Port,A5_Pin,GPIO_PIN_SET);    break;//
					case 0x16 : HAL_GPIO_WritePin(A6_GPIO_Port,A6_Pin,GPIO_PIN_SET);    break;//
					case 0x17 : HAL_GPIO_WritePin(A7_GPIO_Port,A7_Pin,GPIO_PIN_SET);    break;//
				}
			}
			CLR();//
		}

Determine the IO's status, and display the current output status feedback screen

Code: Select all

// Determine the value of IO and display the corresponding status value in the status box		if(!HAL_GPIO_ReadPin(A1_GPIO_Port,A1_Pin))//
		{//
			data_send[4]=0x00;//
			data_send[5]=0x20;//
			data_send[6]=0xB4;//
			data_send[7]=0xF2;
			data_send[8]=0xBF;
			data_send[9]=0xAA;
			UART1_Send_Array(data_send,12);//
		}
		else
		{//
			data_send[4]=0x00;//
			data_send[5]=0x20;//
			data_send[6]=0xB9;//
			data_send[7]=0xD8;
			data_send[8]=0xB1;
			data_send[9]=0xD5;
			UART1_Send_Array(data_send,12);//
		}

Video demo

https://www.youtube.com/watch?v=cMOueXYxGMM

Posted: **Wed Sep 22, 2021 12:28 pm**

Well done.
Thank you for sharing the details.

Posted: **Wed Sep 22, 2021 2:24 pm**

Very nice! Great job and thanks for sharing

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