Library For ST7567 GLCD with STM32G0B1RCT6

[Berlin-raj123]

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 

[Tesla DeLorean]

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

[Berlin-raj123]

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?

[gbm]

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

[Berlin-raj123]

no dude! i connected everything correctly

[Berlin-raj123]

I verified hardware connection, as per our connection set up,

Controller - SPI2 CLK is connected to CRO channel1 SCK

Controller - SPI2 MOSI is connected to CRO channel3 MOSI 

Controller - SPI2 CS is connected to CRO channel4 CS

[Berlin-raj123]

Anyone please help me!! i am waiting for your response

[Saket_Om · Accepted solution]

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 */
  }

}