Send variable from screen1View.cpp to Model.cpp

What do you mean by parameter? Do you mean a variable? If so define that in main.h for example as extern, then define it completely in main, and then include the header file.

Thanks for the quick replies.

Yes, I mean a variable.

Is it also possible to send the variable directly from screen1View to main.c?

I have already implemented the reverse way. From main.c to Model.cpp using xQueueSendFromISR

I'm sorry I don't understand this way.

Do you have an example?

it works. Thank you very much!

Queues is good for situation, when you dont have reference value is displayed or not, or when exist big amount to display and make if for every is complicated.

Then you wait for queue event and then change display once per event. switch case or if is here same , but executed only on event received.

Hello,

I have no data to send.

With the queue I want to set a sign that something moves in the display.

Correct: I press the joystick button of the STM32429I-EVAL1 down and a bar in the display should move down.

Hello Alexandre,

thank you very much for the answer.

Where can I find the G0 application template?

Do you know if it works with a button connected to the processor via I²C?

I tried to include the hardware button as described in the TouchGFX document: "External events as trigger" (https://support.touchgfx.com/docs/4.14/development/board-bring-up/example-gpio).

It fails already at the definition of the PIN! The GPIO pin cannot be declared as "input" in "GPIO_MODE". Currently it is set to "GPIO_MODE_IT_RISING_FALLING".

I think this is the reason why my program terminates after a few clicks on the button.

Is there an example somewhere?

try read this [TouchGFX]How to use the Trigger "Hardware button is clicked" (st.com)

I already did that with the keyboard a few months ago and it worked.

I have tried this now.

First:

Initialize interrput of the joystick on the board in main.c.

__________________________________________________________________________________________________________________

 uint8_t i2c_buffer[3];

 //uint8_t joystik_state = 0xFF;

 memset(i2c_buffer,0x00,sizeof(i2c_buffer));

 volatile HAL_StatusTypeDef result = HAL_OK;

 /* In System Control soft reset */

 i2c_buffer[0] = 0x10;

 result = HAL_I2C_Mem_Write(&hi2c1, 0x84, 0x03, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 /* Read the Chip-ID and version number */

 result = HAL_I2C_Mem_Read(&hi2c1, 0x84, 0x00, I2C_MEMADD_SIZE_8BIT, i2c_buffer,3, 1000);

 /* Set joystick PINs of Input*/

 result = HAL_I2C_Mem_Read(&hi2c1, 0x84, 0x15, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 i2c_buffer[0] = i2c_buffer[0] & 0x13;

 result = HAL_I2C_Mem_Write(&hi2c1, 0x84, 0x15, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 /* In system Control register activate interrupt */

 i2c_buffer[0] = 0x04;

 result = HAL_I2C_Mem_Write(&hi2c1, 0x84, 0x03, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 /* activate interrupt Joystick PINs */

 i2c_buffer[0] = 0x7C;

 result = HAL_I2C_Mem_Write(&hi2c1, 0x84, 0x09, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 /* delete interrupt in state register*/

 i2c_buffer[0] = 0x00;

 result = HAL_I2C_Mem_Read(&hi2c1, 0x84, 0x0B, I2C_MEMADD_SIZE_8BIT, i2c_buffer, 1, 1000);

 _________________________________________________________________________________________________________________

Second:

Implemented the following code in Model.cpp

__________________________________________________________________________________________________________________

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)

{

 // Prevent unused argument(s) compilation warning

 UNUSED(GPIO_Pin);

 uint8_t joystik_NEW_state = 0xFF;

      I2C_HandleTypeDef hi2c1;

 //aks Value from PIN

 if(GPIO_PIN_8)

 {

       uint8_t joystik_state = 0xFF;

       HAL_StatusTypeDef result = HAL_OK;

       result = HAL_I2C_Mem_Read(&hi2c1, 0x84, 0x0B, I2C_MEMADD_SIZE_8BIT, &joystik_state, 1, 1000);

       uint8_t dummy = 0x00;

       result = HAL_I2C_Mem_Read(&hi2c1, 0x84, 0x0B, I2C_MEMADD_SIZE_8BIT, &dummy, 1, 1000);

 }

}

 __________________________________________________________________________________________________________________

I have set a breakpoint at the beginning of the function. When I press the joystick button once, the program also stops at this point. If I press it a second time, the breakpoint is not reached anymore.

I have run the code to query the interrupts also in the main.c and there it runs through often, but sometime after 10....20...30 times pressing the program hangs in the task.c.