STM32F103C8 using SPI2

[hamo]

Hello,

i am trying to interface 1.8 inch SPI TFT Display 128 x 160 to the STM32F103C8 using SPI2.

https://www.az-delivery.de/products/1-8-zoll-spi-tft-display

SPI1 is used for LoRa, i thought to connect TFT too to SPI1 using addresses but i am affraid to influence the

LoRa.

The library which i am using is from this website:
https://controllerstech.com/st7735-1-8-tft-display-with-stm32/

A year earlier i tried to interface LoRa to STM32F103C8 using SPI2 but without success.

Is it a general problem in STM32F103C8 using SPI2?

Any help is appreciated.

[hamo]

@AScha.3  thanks

I will try that but i am using Keil IDE and not STM32CubeIDE.

I tries to use STM21CubeIDE, but it couldn't upload the code to the MCU.

[hamo]

CS ist low -> correct.

I have tried transmit only master -> no

The problem is  -> NO CLOCK.

NO CLOCK -> WILL NOT WORK.

[AScha.3]

>I tries to use STM21CubeIDE, but it couldn't upload the code to the MCU.

Why ?   wrong debug setting ?

[hamo]

@AScha.3 

Yes i think wrong debug setting.
can you share your debug settings please for the bluepill?

Thanks

[hamo]

I have debugged RCC -> APB1ENR:

Bit 14 in RCC is set -> SPI2 is enabled

[hamo]

I need a driver for the 1.8 TFT ST7735.

I am not sure but it may lay on the driver i am using.

Do you know any?

[xisco]

I'm sorry. My 2 inch 240x320 display works with ST7789 driver.

I think that is not compatible with ST7735.

[hamo]

Thank you all for the support, but i think there is a big problem with the SPI2.
Neither this driver has worked.
The same issue -> HAL_SPI_Transmit() keep stucks.
Idk what to do now.

[AScha.3]

You have another board/cpu to try ? Just to check, that you not damaged this cpu/spi2 - and it cannot work....

[hamo]

@xisco 

I have tried PB13 as DIO and the LED blinks normaly

The GPIO B13 is working normaly, so the problem is with the SPI settings i think.

[hamo]

I have tried another STM32F103C8T6 -> not working.

[AScha.3]

Ok, so : your SPI2 not "working" , others (+mine) do ; cpu change -> same , so cpu ok. (except other cpu same damage.)

If same setup (in Cube) , same HAL calls used , but nothing coming out -> your on wrong pin. check again.

[hamo]

I am interfacing only the display right now.

There is no LoRa now.

Display cables are max 7cm.

[hamo]

I have tried many borads -> no success

[hamo]

The problem was with the hardware.
Finally i could get the SPI2 work together with SPI1 on the same Board.
Many Bluepills are just not good this days.

Anyway thank you all for being helpful.

Best regards

Mohamad