Interface the ST7567 GLCD with STM32G0B1RC26

[Berlin-raj123]

Hi,

    I am trying to interface a graphical LCD (ST7567) with the STM32G0B1RCT6 using the U8g2 library and a software SPI interface. I have the U8g2 driver, but I don't know how to configure the ST7567 driver with the STM32G0B1RCT6. I will attach the graphical LCD ST7567. Can anyone help me?

[SofLit]

Hello,

You've already asked a similar question in this thread and you accepted it.

Could you please clarify what is going on?

[OKrau.1]

I have created an example code for u8g2 and the STM32G0 controller: stm32g031/u8g2_test_8 at main · olikraus/stm32g031 · GitHub

You need to specify the desired display here: https://github.com/olikraus/stm32g031/blob/b2424031633993d6fc16a2eb8c0b365e91190194/u8g2_test_8/u8g2_test_8.c#L251

Available displays for the ST7567 are listed here: https://github.com/olikraus/u8g2/wiki/u8g2setupc#st7567-jlx12864 

My example code is for I2C. To use SPI, you need to change the code here: https://github.com/olikraus/stm32g031/blob/b2424031633993d6fc16a2eb8c0b365e91190194/u8g2_test_8/u8x8cb.c#L86-L114

Instead you need to listen to the following messages (see https://github.com/olikraus/u8g2/wiki/Porting-to-new-MCU-platform#template-for-the-gpio-and-delay-callback)

case U8X8_MSG_GPIO_SPI_CLOCK:
  if ( arg_int == 0 ) GPIOA->BSRR = GPIO_BSRR_BR2 /* atomic clr PA2 */
  else GPIOA->BSRR = GPIO_BSRR_BS_2; /* atomic set PA2 */
  break;
case U8X8_MSG_GPIO_SPI_DATA:
  break;
case U8X8_MSG_GPIO_DC: // DC (data/cmd, A0, register select) pin: Output level in arg_int 
  break; 
case U8X8_MSG_GPIO_RESET: // Reset pin: Output level in arg_int 
  break;

In the above example I assigned clock port to PA2. Code for the other messages will be similar except for a different port. Of course you could also use the HAL statements.

Finally you need to tell u8g2 to use SW-SPI:

https://github.com/olikraus/stm32g031/blob/b2424031633993d6fc16a2eb8c0b365e91190194/u8g2_test_8/u8g2_test_8.c#L251

It could look like this:

u8g2_Setup_st7567_jlx12864_f(&u8g2, U8G2_R0, u8x8_byte_4wire_sw_spi, u8x8_gpio_and_delay_stm32g0)

Oliver