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Berlin-raj123
Visitor II
November 6, 2024
Solved

Library For ST7567 GLCD with STM32G0B1RCT6

  • November 6, 2024
  • 1 reply
  • 3269 views

HI, I am trying to implement ST7567 GLCD (128x64) with SPI on my STM32G0B1RCT6 MCU. Unfortunately i am not getting the Example Driver, i tried my self but there is no improvement, So Any one Kindly send me the STM32 related ST7567 GLCD Example 

    This topic has been closed for replies.
    Best answer by Saket_Om

    Hello @Berlin-raj123 

    I modified the example Projects/NUCLEO-G0B1RE/Examples/SPI/SPI_FullDuplex_ComDMA_Master to fit your settings. The SPI sent the data without correctly.

    Please find below the used SPI configuration:

    static void MX_SPI2_Init(void)
{

 /* USER CODE BEGIN SPI1_Init 0 */

 /* USER CODE END SPI1_Init 0 */

 /* USER CODE BEGIN SPI2_Init 1 */

 /* USER CODE END SPI2_Init 1 */
 /* SPI2 parameter configuration*/
 hspi2.Instance = SPI2;
 hspi2.Init.Mode = SPI_MODE_MASTER;
 hspi2.Init.Direction = SPI_DIRECTION_1LINE;
 hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
 hspi2.Init.CLKPolarity = SPI_POLARITY_HIGH;
 hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;
 hspi2.Init.NSS = SPI_NSS_SOFT;
 hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
 hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
 hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
 hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
 hspi2.Init.CRCPolynomial = 7;
 hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
 hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
 if (HAL_SPI_Init(&hspi2) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN SPI2_Init 2 */

 /* USER CODE END SPI2_Init 2 */

}

void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 if(hspi->Instance==SPI2)
 {
 /* USER CODE BEGIN SPI2_MspInit 0 */

 /* USER CODE END SPI2_MspInit 0 */
 /* Peripheral clock enable */
 __HAL_RCC_SPI2_CLK_ENABLE();

 __HAL_RCC_GPIOC_CLK_ENABLE();
 __HAL_RCC_GPIOA_CLK_ENABLE();
 /**SPI1 GPIO Configuration
 PA0 ------> SPI1_SCK
 PC2 ------> SPI1_MISO
 PC3 ------> SPI1_MOSI
 */
 GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 GPIO_InitStruct.Alternate = GPIO_AF1_SPI2;
 HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

 GPIO_InitStruct.Pin = GPIO_PIN_0;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 GPIO_InitStruct.Alternate = GPIO_AF0_SPI2;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /* USER CODE BEGIN SPI2_MspInit 1 */

 /* USER CODE END SPI2_MspInit 1 */
 }

}

     

    1 reply

    T
    Tesla DeLorean
    Graduate II
    November 6, 2024

    Perhaps find a developer on your team that can code, or port

    Get a scope or logic analyzer on the signals and confirm you have communications,and can interact with the registers, send the initialization sequences.

    https://github.com/mithunkamat/ST7567-driver

    https://github.com/kaushalparikh/nuttx/blob/master/drivers/lcd/st7567.c

    https://www.crystalfontz.com/controllers/Sitronix/ST7567/?srsltid=AfmBOoqNqEOyPlZ8Rv645yC8ZcUo7UJmTZVt-HBAeSso8EuMHTF1lK5u

      B
      Berlin-raj123Author
      Visitor II
      November 7, 2024

      Initially, I just wanted to check if the SPI is working, so I used an oscilloscope. I did get a signal, but it looks different than expected. I sent a single data byte, 0xFE, but the oscilloscope on the MOSI pin shows 0x00

      here are my connection IOC Connection

      Clk = 64 MHZ

      mode :Half Duplex Master

      Data Size :8 bits

      baud rate : 4MBit/S

      CPOL : HIGH

      CPHASE : 2 EDGE

      void Write_Command_SPI(uint8_t cmd)
{
 CS_LOW();
 RS_CMD(); // Set RS pin to Command mode
 HAL_SPI_Transmit(&hspi2, &cmd, 1, HAL_MAX_DELAY);
 //RS_CMD();
 CS_HIGH();
}
// Initialize ST7567
void ST7567_Init() {
 // Reset the display
 RESET_LOW();
 HAL_Delay(50);
 RESET_HIGH();
 HAL_Delay(50);

 //Send initialization commands
 // Example initialization commands, consult ST7567 datasheet for details
 Write_Command_SPI(0xAE); // Display OFF
 Write_Command_SPI(0xA2); // Set Bias
 Write_Command_SPI(0xA0); // Set SEG Direction
 Write_Command_SPI(0xC8); // Set COM Direction
 Write_Command_SPI(0xA4); // Disable Entire Display ON
 Write_Command_SPI(0xA6); // Normal Display
 Write_Command_SPI(0x2F); // Power Control
 Write_Command_SPI(0x27); // Set Contrast
 Write_Command_SPI(0x81); // Set Electronic Volume
 Write_Command_SPI(0x10); // Set Volume
 Write_Command_SPI(0xAF); // Display ON
}
main()
{ 
 MX_SPI2_Init();
 /* USER CODE BEGIN 2 */
 // Initialize the ST7567 display
 //ST7567_Init();

 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */
	 // Send test data periodically for SPI signal check
	 Write_Command_SPI(0xFE);
	 HAL_Delay(100); // Wait 100ms to easily observe SPI signals on CRO
 }

       

      how to get the single data?WhatsApp Image 2024-11-07 at 7.14.51 PM.jpeg

      G
      gbm
      Graduate
      November 7, 2024

      Connect the probe to MOSI. Currently it looks like it's connected to SCK.

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