I am not really working with STM32, but my Workspace in STM32CubeIDE is not empty. :-)
Setting up a project for the STM32Wb55RG revealed that my passwort on
www.st.com had expired...
Oh, I also still did not implement DMA suppport.
Anyways, I started a new project with the NUCLEO-WB55RG and configured SPI1:
PA5 = SPI1_SCK
PA6 = SPI1_MISO
PA7 = SPI1_MOSI
And two GPIO-Outputs, PA3 and PA4.
I set the driver for SPI and GPIO to "LL".
I have no idea though to what the clocks are configured.
The SPI needs to be (at least initially) set to 11MHz or less.
The code is generated and the project builds.
Now I opened the project in the file explorer and went into /Core/Src/.
I created a folder "EmbeddedVideoEngine" and copied over the files from my library.
The folder EVE_target only needs to have the file EVE_target_STM32.h .
In the "examples" folder are several copies of "tfc.c", "tft.h", "tft_data.c" and "tft_data.h", for the most part these are all the same but the ones
in the "...PlatformIo" folders do not have the "EmbeddedVideoEngine" in the include for "EVE.h".
So I used the files from examples\EVE_Test_SAMC21_EVE2-50G\ and copied them to /Core/Src/.
Refreshing the project in STM32CubeIDE and the files show up.
Building the project fails however, the first error here is:
../Core/Src/EmbeddedVideoEngine/EVE_commands.c:3037:36: error: unknown type name 'int16_t'
And the reason is, my library does not know what a STM32WB is, yet.
Checking the properties/"C/C++ Build"/Settings/MCU GCC Compiler/Preprocessor, there is the symbol "STM32WB55xx" defined.
So the first thing to do is to add this symbol to EVE_target.h so that EVE_target_STM32.h gets included.
And now EVE_target_STM32.h needs to be expanded to load the correct includes:
#if defined (STM32WB55xx) /* set with "build_flags = -D STM32WB55xx" in platformio.ini */
#include "stm32wbxx.h"
#include "stm32wbxx_hal.h"
#include "stm32wbxx_ll_spi.h"
#endif
Building the project again, it still fails, but now the error is:
#error "Please add a define for the desired display to your build-environment, e.g. -DEVE_EVE3_50G"
So there is no display selected.
Back to the properties I added a new symbol: "EVE_EVE3_50G".
-> 18:57:17 Build Finished. 0 errors, 0 warnings. (took 1s.755ms)
In EVE_target_STM32.h also is the configuration for the CS and PD pins as well the SPI to use:
#if !defined (EVE_CS)
#define EVE_CS_PORT GPIOA
#define EVE_CS GPIO_PIN_4
#endif
#if !defined (EVE_PDN)
#define EVE_PDN_PORT GPIOA
#define EVE_PDN GPIO_PIN_3
#endif
#if !defined (EVE_SPI)
#define EVE_SPI SPI1
#endif
Nice coincidence, I already setup PA3 and PA4 as outputs and selected SPI1. :-)
And I just uploaded the modified EVE_target.h and EVE_target_STM32.h to Github.
But the project won't display anything so far.
So now main.c needs to be modified:
/* USER CODE BEGIN Includes */
#include "tft.h"
/* USER CODE END Includes */
int main(void)
{
...
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI1_Init();
/* USER CODE BEGIN 2 */
TFT_init();
TFT_display();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
This should at least display one frame.
Usually I would put this in the endless loop, together with the TFT_touch() function from the example.
But the default main.c from STM32CubeIDE does not have even a primitive scheduler and while there is a SysTick_Handler(),
I am not sure to what tick it is configured.
Normally I would go for 5ms ticks, execute TFT_display() every 20ms and execute TFT_touch() every 5ms when TFT_display()
is not executed.
But well, my job was done when it compiled. :-)
() which returns E_OK when a counter was lower than perhaps 10 and
: