[main] fix: cast wrongly converted integer back into the pointer to remove warning

Current implementation contains full support for:
- transparent switching between direct and framebuffer rendering modes
- writing characters to framebuffers
- loading frame from memory to physical display

As well as partial support for instruction writes including:
- resetting the display (clears memory, sets cursor at 0:0, switches to increment mode)
- switching between increment/decrement modes
- setting cursor position

Core/Src/PCA9685.c

@@ -40,8 +40,6 @@ int PCA9685_run_test(void)
 				display_write_data_seq("/5 ");
 
 				switch (op_result) {
-				case HAL_OK:
-					break;
 				case HAL_ERROR:
 					display_write_data_seq("ERROR");
 					break;

Core/Src/lcd.c

@@ -136,12 +136,6 @@ static void display_write_data_byte_direct(uint8_t code)
 
 static void display_write_data_byte_framebuffer(uint8_t code)
 {
-	if (display_current_frame >= DISPLAY_FRAMES_AVAILABLE)
-		return;
-
-	if (((int) des.cursor_offset >= 32) || ((int) des.cursor_offset < 0))
-		return;
-
 	display_framebuffer[16*2*display_current_frame + des.cursor_offset] = (char) code;
 	des.cursor_offset += des.next ? -1 : 1;
 }

Core/Src/main.c

@@ -46,17 +46,6 @@
 #define WAIT_UNTIL_CB_PRESSED while (!HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_0) && HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_8))
 #define WAIT_UNTIL_CB_RELEASED while (HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_0) || !HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_8))
 
-#define UB (GPIOA->IDR & GPIO_PIN_0)
-#define SWT1 !(GPIOC->IDR & GPIO_PIN_11)
-#define SWT2 !(GPIOA->IDR & GPIO_PIN_15)
-#define SWT3 !(GPIOC->IDR & GPIO_PIN_9)
-#define SWT4 !(GPIOC->IDR & GPIO_PIN_6)
-#define SWT5 !(GPIOC->IDR & GPIO_PIN_8)
-
-#define WAIT_UNTIL_ALL_BUTTONS_RELEASED do {} while ( UB || SWT1 || SWT2 || SWT3 || SWT4 || SWT5 )
-
-#define LEN(x) ( sizeof(x) / sizeof((x)[0]) )
-
 /* USER CODE END PD */
 
 /* Private macro -------------------------------------------------------------*/
@@ -79,19 +68,22 @@ extern size_t display_current_frame;
 
 /* USER CODE BEGIN PV */
 
-static const int ((*executors[])(void)) = {
+int ((*executors[])(void)) = {
 		DNI_show_celsius,
+		DNI_show_fahrenheit,
 		PCA9685_run_test,
 		EEPROM_24AA02E48_run_test,
 		CS43L22_run_test,
 		SST25VF016B_run_test,
 		LIS302DL_run_test,
+		LIS302DL_run_test_dynamic,
 		MP45DT02_run_test,
 		LSM9DS1_test_accel,
 		LSM9DS1_test_magnet
 };
 
-static const void ((*cleanup_functions[])(void)) = {
+void ((*cleanup_functions[])(void)) = {
+		NULL,
 		NULL,
 		PCA9685_cleanup,
 		NULL,
@@ -99,10 +91,29 @@ static const void ((*cleanup_functions[])(void)) = {
 		NULL,
 		NULL,
 		NULL,
+		NULL,
 		LSM9DS1_cleanup_accel,
 		NULL
 };
 
+int delay_between_runs[] = {
+		250,
+		250,
+		-1,
+		-1,
+		-1,
+		-1,
+		-1,
+		200,
+		-1,
+		-1,
+		-1
+		};
+
+size_t current_executor_id = 0;
+
+size_t buttons_interrupt_enabled;
+
 /* USER CODE END PV */
 
 /* Private function prototypes -----------------------------------------------*/
@@ -120,7 +131,67 @@ static void MX_I2S2_Init(void);
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
 
-static void button_init_and_test(void)
+void switch_to_next_test(void)
+{
+	current_executor_id += 1;
+	current_executor_id %= 11;
+}
+
+void buttons_switch_to_interrupt(void)
+{
+	// save current executor ID
+	size_t tmp = current_executor_id;
+
+	// configure user button
+	GPIO_InitTypeDef GPIO_InitStruct = {0};
+	GPIO_InitStruct.Pin = GPIO_PIN_0;
+	GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
+	GPIO_InitStruct.Pull = GPIO_NOPULL;
+	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+	HAL_NVIC_SetPriority(EXTI0_IRQn, 0, 0);
+	HAL_NVIC_EnableIRQ(EXTI0_IRQn);
+
+	// configure SW5 (alternative advancing method)
+	GPIO_InitStruct.Pin = GPIO_PIN_8;
+	GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
+	GPIO_InitStruct.Pull = GPIO_NOPULL;
+	HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+	HAL_NVIC_SetPriority(EXTI9_5_IRQn, 0, 0);
+	HAL_NVIC_EnableIRQ(EXTI9_5_IRQn);
+
+	// restore current executor ID
+	current_executor_id = tmp;
+
+	// set interrupt mode flag
+	buttons_interrupt_enabled = 1;
+}
+
+void buttons_switch_to_input(void)
+{
+	// configure user button
+	GPIO_InitTypeDef GPIO_InitStruct = {0};
+	GPIO_InitStruct.Pin = GPIO_PIN_0;
+	GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+	GPIO_InitStruct.Pull = GPIO_NOPULL;
+	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+	HAL_NVIC_DisableIRQ(EXTI0_IRQn);
+
+	// configure SW5 (alternative input method)
+	GPIO_InitStruct.Pin = GPIO_PIN_8;
+	GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+	GPIO_InitStruct.Pull = GPIO_NOPULL;
+	HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+	HAL_NVIC_DisableIRQ(EXTI9_5_IRQn);
+
+	// clear interrupt mode flag
+	buttons_interrupt_enabled = 0;
+}
+
+void button_init_and_test(void)
 {
 	// letting the buttons be tested
 	display_write_data_seq("Fill any bar:");
@@ -130,11 +201,11 @@ static void button_init_and_test(void)
 	size_t pressed_elements;
 
 	uint32_t sw_button_locations[5][2] = {
-			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_11},
-			{(uint32_t) GPIOA, (uint32_t) GPIO_PIN_15},
-			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_9},
-			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_6},
-			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_8}
+			{GPIOC, GPIO_PIN_11},
+			{GPIOA, GPIO_PIN_15},
+			{GPIOC, GPIO_PIN_9},
+			{GPIOC, GPIO_PIN_6},
+			{GPIOC, GPIO_PIN_8}
 	};
 
 	do {
@@ -172,16 +243,16 @@ static void button_init_and_test(void)
 	display_write_data_seq("Release buttons");
 
 	GPIOD->ODR = 0x1000;
-	HAL_Delay(300);
+	HAL_Delay(500);
 	GPIOD->ODR = 0x2000;
-	HAL_Delay(300);
+	HAL_Delay(500);
 	GPIOD->ODR = 0x4000;
-	HAL_Delay(300);
+	HAL_Delay(500);
 	GPIOD->ODR = 0x8000;
-	HAL_Delay(300);
+	HAL_Delay(500);
 
-	// waiting for all buttons to be released
-	WAIT_UNTIL_ALL_BUTTONS_RELEASED;
+	// waiting for control buttons to be released
+	WAIT_UNTIL_CB_RELEASED;
 	GPIOD->ODR = 0x0000;
 	HAL_Delay(200);
 }
@@ -223,6 +294,7 @@ int main(void)
   MX_TIM2_Init();
   MX_I2S2_Init();
   /* USER CODE BEGIN 2 */
+  buttons_interrupt_enabled = 0;
 
   HAL_TIM_Base_Start(&htim2);
   TIM2->CNT = 0;
@@ -238,7 +310,9 @@ int main(void)
   size_t successful_tests = 0;
   size_t failed_tests = 0;
 
-  for (display_current_frame = 1; display_current_frame < LEN(executors)+1; display_current_frame++)
+  //display_to_framebuffer();
+
+  for (display_current_frame = 1; display_current_frame < 12; display_current_frame++)
   {
 	  DISPLAY_CLEAR;
 	  display_write_data_seq("Testing...");
@@ -287,43 +361,94 @@ int main(void)
 
   display_to_direct();
 
-  /* USER CODE END 2 */
 
-  /* Infinite loop */
-  /* USER CODE BEGIN WHILE */
+  if (buttons_interrupt_enabled)
+	  buttons_switch_to_input();
+
   while (1) {
-	  WAIT_UNTIL_ALL_BUTTONS_RELEASED;
+	  // wait until all buttons are released
+	  while (
+			  (GPIOA->IDR & GPIO_PIN_0) ||
+			  !(GPIOC->IDR & GPIO_PIN_11) ||
+			  !(GPIOC->IDR & GPIO_PIN_8) ||
+			  !(GPIOC->IDR & GPIO_PIN_9) ||
+			  !(GPIOC->IDR & GPIO_PIN_6) ||
+			  !(GPIOA->IDR & GPIO_PIN_15)
+	  ) { asm("nop"); }
 
 	  display_load(display_current_frame);
 
 	  while (1) {
 		  // go to next report
-		  if (UB || SWT1 || SWT5) {
+		  if (
+				  (GPIOA->IDR & GPIO_PIN_0) ||
+				  !(GPIOC->IDR & GPIO_PIN_11) ||
+				  !(GPIOC->IDR & GPIO_PIN_8)
+		  ) {
 			  display_current_frame += 1;
-			  display_current_frame %= LEN(executors)+1;
+			  display_current_frame %= 12;
 			  break;
 		  }
 
 		  // go to previous report
-		  else if (SWT3 || SWT4) {
+		  else if (
+				  !(GPIOC->IDR & GPIO_PIN_9) ||
+		  	  	  !(GPIOC->IDR & GPIO_PIN_6)
+	  	  ) {
 			  display_current_frame -= 1;
 
-			  if ((int) display_current_frame == -1)
-				  display_current_frame = LEN(executors);
+			  if (display_current_frame == 0xFFFFFFFFU)
+				  display_current_frame = 11;
 
 			  break;
 		  }
 
 		  // return to summary frame
-		  else if (SWT2) {
+		  else if (
+				  !(GPIOA->IDR & GPIO_PIN_15)
+		  ) {
 			  display_current_frame = 0;
 			  break;
 		  }
 	  }
+  }
+
+  /* USER CODE END 2 */
+
+  /* Infinite loop */
+  /* USER CODE BEGIN WHILE */
+
+  /*
+  while (1)
+  {
+	if (delay_between_runs[current_executor_id] == -1 && buttons_interrupt_enabled)
+		buttons_switch_to_input();
+	else if (delay_between_runs[current_executor_id] != -1 && !buttons_interrupt_enabled)
+		buttons_switch_to_interrupt();
+
+	executors[current_executor_id]();
+
+	if (delay_between_runs[current_executor_id] == -1) {
+		WAIT_UNTIL_CB_PRESSED;
+		HAL_Delay(150);
+		GPIOD->BSRR = 0x1000;
+
+		WAIT_UNTIL_CB_RELEASED;
+		HAL_Delay(150);
+		GPIOD->BSRR = 0x1000 << 16;
+
+		if (cleanup_functions[current_executor_id])
+			cleanup_functions[current_executor_id]();
+
+		switch_to_next_test();
+	} else {
+		HAL_Delay(delay_between_runs[current_executor_id]);
+	}
+	*/
     /* USER CODE END WHILE */
 
     /* USER CODE BEGIN 3 */
-  }
+  //}
   /* USER CODE END 3 */
 }
 

Core/Src/stm32f4xx_it.c

@@ -204,7 +204,7 @@ void EXTI0_IRQHandler(void)
 {
 	GPIOD->ODR = 0x1000;
 
-	//switch_to_next_test();
+	switch_to_next_test();
 
 	for (int i = 300000; i > 0; i--) asm("nop");
 
@@ -217,7 +217,7 @@ void EXTI9_5_IRQHandler(void)
 {
 	GPIOD->ODR = 0x1000;
 
-	//switch_to_next_test();
+	switch_to_next_test();
 
 	for (int i = 300000; i > 0; i--) asm("nop");