[lcd] forbid writing outside of current framebuffer memory

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

.cproject

@@ -36,7 +36,7 @@
 							</tool>
 							<tool id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.1285639549" name="MCU/MPU GCC Compiler" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler">
 								<option id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.debuglevel.75005491" name="Debug level" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.debuglevel" useByScannerDiscovery="false" value="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.debuglevel.value.g3" valueType="enumerated"/>
-								<option id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.optimization.level.1711938240" name="Optimization level" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.optimization.level" useByScannerDiscovery="false" value="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.optimization.level.value.o0" valueType="enumerated"/>
+								<option id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.optimization.level.1711938240" name="Optimization level" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.optimization.level" useByScannerDiscovery="false"/>
 								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.definedsymbols.1662015804" name="Define symbols (-D)" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.compiler.option.definedsymbols" useByScannerDiscovery="false" valueType="definedSymbols">
 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="USE_HAL_DRIVER"/>
@@ -150,7 +150,7 @@
 						</toolChain>
 					</folderInfo>
 					<sourceEntries>
-						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Core"/>
+						<entry excluding="Src/mock_lcd.c" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Core"/>
 						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="Drivers"/>
 					</sourceEntries>
 				</configuration>

Core/Inc/24AA02E48.h

@@ -1,6 +1,6 @@
 #ifndef __EEPROM_24AA02E48
 #define __EEPROM_24AA02E48
 
-void EEPROM_24AA02E48_run_test(void);
+int EEPROM_24AA02E48_run_test(void);
 
 #endif

Core/Inc/CS43L22.h

@@ -1,7 +1,7 @@
 #ifndef __CS43L22
 #define __CS43L22
 
-void CS43L22_run_test(void);
+int CS43L22_run_test(void);
 void CS43L22_cleanup(void);
 
 #endif

Core/Inc/DHT11.h

@@ -1,17 +0,0 @@
-#ifndef __DHT11
-#define __DHT11
-
-#define SKIP_LOW while (!(GPIOD->IDR & 0x0800)) {}
-#define SKIP_HIGH while (GPIOD->IDR & 0x0800) {}
-
-struct DHT11_Data {
-	uint8_t humid_integral;
-	uint8_t humid_decimal;
-	uint8_t temp_integral;
-	uint8_t temp_decimal;
-	uint8_t crc;
-};
-
-void DHT11_run_test(void);
-
-#endif

Core/Inc/DNI.h

@@ -3,7 +3,7 @@
 
 extern ADC_HandleTypeDef hadc1;
 
-void DNI_show_celsius(void);
+int DNI_show_celsius(void);
-void DNI_show_fahrenheit(void);
+int DNI_show_fahrenheit(void);
 
 #endif

Core/Inc/LIS302DL.h

@@ -1,7 +1,7 @@
 #ifndef __LIS302DL
 #define __LIS302DL
 
-void LIS302DL_run_test(void);
+int LIS302DL_run_test(void);
-void LIS302DL_run_test_dynamic(void);
+int LIS302DL_run_test_dynamic(void);
 
 #endif

Core/Inc/LSM9DS1.h

@@ -1,8 +1,8 @@
 #ifndef __LSM9DS1
 #define __LSM9DS1
 
-void LSM9DS1_test_accel(void);
+int LSM9DS1_test_accel(void);
 void LSM9DS1_cleanup_accel(void);
-void LSM9DS1_test_magnet(void);
+int LSM9DS1_test_magnet(void);
 
 #endif

Core/Inc/MP45DT02.h

@@ -1,6 +1,6 @@
 #ifndef __MP45DT02
 #define __MP45DT02
 
-void MP45DT02_run_test(void);
+int MP45DT02_run_test(void);
 
 #endif

Core/Inc/PCA9685.h

@@ -1,7 +1,7 @@
 #ifndef __PCA9685
 #define __PCA9685
 
-void PCA9685_run_test(void);
+int PCA9685_run_test(void);
 void PCA9685_cleanup(void);
 
 #endif

Core/Inc/SST25VF016B.h

@@ -1,6 +1,6 @@
 #ifndef __SST25VF016B
 #define __SST25VF016B
 
-void SST25VF016B_run_test(void);
+int SST25VF016B_run_test(void);
 
 #endif

Core/Inc/lcd.h

@@ -7,6 +7,8 @@
 #define DISPLAY_RW  ((uint16_t) (0x1U << 10))
 #define DISPLAY_ENA ((uint16_t) (0x1U << 11))
 
+#define DISPLAY_FRAMES_AVAILABLE 14
+
 #define DISPLAY_POLL_UNTIL_READY do { while (display_read_status() & 0x80) {} } while (0)
 
 #define DISPLAY_SET_INCREMENT do { display_write_instruction_byte(0x06); } while (0)
@@ -16,11 +18,17 @@
 
 #define DISPLAY_CLEAR do { display_write_instruction_byte(0x01); } while (0)
 
+struct Display_emu_state {
+	size_t cursor_offset:5;
+	size_t next:1;
+};
 
 void display_init(void);
-uint8_t display_read_status(void);
 void display_write_instruction_byte(uint8_t code);
 void display_write_data_byte(uint8_t code);
 void display_write_data_seq(char *codes);
+void display_to_framebuffer(void);
+void display_to_direct(void);
+void display_load(uint32_t frame_no);
 
 #endif

Core/Inc/main.h

@@ -32,6 +32,8 @@ extern "C" {
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 
+#include <string.h>
+
 /* USER CODE END Includes */
 
 /* Exported types ------------------------------------------------------------*/

Core/Src/24AA02E48.c

@@ -4,7 +4,7 @@
 
 extern I2C_HandleTypeDef hi2c1;
 
-void EEPROM_24AA02E48_run_test(void)
+int EEPROM_24AA02E48_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("24AA02E48 EEPROM");
@@ -94,9 +94,13 @@ void EEPROM_24AA02E48_run_test(void)
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq("E ");
 		display_write_data_seq((char *) data_buffer);
+
+		return 1;
 	} else {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK ");
 		display_write_data_seq((char *) data_buffer);
+
+		return 0;
 	}
 }

Core/Src/CS43L22.c

@@ -4,7 +4,7 @@
 
 extern I2C_HandleTypeDef hi2c1;
 
-void CS43L22_run_test(void)
+int CS43L22_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("CS43L22 Audio");
@@ -57,9 +57,13 @@ void CS43L22_run_test(void)
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq(" Errors");
+
+		return 1;
 	} else {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK");
+
+		return 0;
 	}
 }
 

Core/Src/DHT11.c

@@ -1,90 +0,0 @@
-#include "main.h"
-#include "generic_macros.h"
-#include "lcd.h"
-#include "DHT11.h"
-
-extern TIM_HandleTypeDef htim2;
-
-static void wait(uint32_t wait_us)
-{
-	uint32_t target_time = TIM2->CNT;
-	target_time += wait_us << 4;
-
-	while (TIM2->CNT < target_time) {}
-}
-
-static size_t dht11_measure_high_duration(void)
-{
-	SKIP_LOW;
-	uint32_t start_time = TIM2->CNT;
-	SKIP_HIGH;
-	uint32_t end_time = TIM2->CNT;
-
-	// elapsed_time > 49us ? 1 : 0
-	return (end_time - start_time) > (49 << 4);
-}
-
-static size_t dht11_read_value(struct DHT11_Data *data)
-{
-	// treat data as a normal array to simplify read loop
-	uint8_t *buffer = (uint8_t *) data;
-
-	register uint32_t read_register = 0;
-
-	TIM2->CNT = 0;
-	HAL_TIM_Base_Start(&htim2);
-
-	GPIOD->MODER |= 0x00400000;      // enable output mode on GPIOD 11
-
-	GPIOD->BSRR = GPIO_PIN_11;       // enable DHT11
-	wait(18000);                     // hold HIGH for 18 ms
-	GPIOD->BSRR = GPIO_PIN_11 << 16; // start signal
-	wait(20);                        // hold it for 20 us
-	GPIOD->BSRR = GPIO_PIN_11;       // pull up, DHT will now take control over the connection
-	wait(40);
-
-	GPIOD->MODER &= 0xFF3FFFFF;      // switch GPIOD 11 to input mode
-
-	// reading pull down from DHT11
-	SKIP_LOW;
-
-	// waiting for 500ms max
-	for (size_t i = TIM2->CNT + (500000 << 4); TIM2->CNT <= i; )
-		if (!(GPIOD->IDR & 0x0800))
-			goto reading_data;
-
-	// if didn't exit through goto, then DHT11 awaiting has timed out
-	return 1;
-
-reading_data:
-	// read 5 bytes of data
-	for (size_t i = 0; i < 5; i++) {
-		for (register size_t j = 0; j < 8; j++) {
-			read_register <<= 1;
-			read_register |= dht11_measure_high_duration();
-		}
-
-		buffer[i] = (uint8_t) read_register;
-	}
-
-	HAL_TIM_Base_Stop(&htim2);
-
-	return 0;
-}
-
-void DHT11_run_test(void)
-{
-	DISPLAY_CLEAR;
-	display_write_data_seq("DHT11 Temp+Humid");
-
-	struct DHT11_Data data;
-	size_t result = dht11_read_value(&data);
-
-	if (result == 1) {
-		DISPLAY_SET_CURSOR(1, 1);
-		display_write_data_seq("START TIMEOUT");
-	} else {
-		DISPLAY_SET_CURSOR(1, 1);
-		display_write_data_seq("OK");
-	}
-}

Core/Src/DNI.c

@@ -73,7 +73,7 @@ static void DNI_print_fahrenheit(int temperature)
 	DNI_print(temperature);
 }
 
-void DNI_show_celsius(void)
+int DNI_show_celsius(void)
 {
 	DISPLAY_CLEAR;
 	DISPLAY_SET_INCREMENT;
@@ -83,9 +83,11 @@ void DNI_show_celsius(void)
 	uint32_t value = DNI_read();
 	int temp = DNI_convert_to_celsius(value);
 	DNI_print_celsius(temp);
+
+	return 0;
 }
 
-void DNI_show_fahrenheit(void)
+int DNI_show_fahrenheit(void)
 {
 	DISPLAY_CLEAR;
 	DISPLAY_SET_INCREMENT;
@@ -95,4 +97,6 @@ void DNI_show_fahrenheit(void)
 	uint32_t value = DNI_read();
 	int temp = DNI_convert_to_fahrenheit(value);
 	DNI_print_fahrenheit(temp);
+
+	return 0;
 }

Core/Src/LIS302DL.c

@@ -105,7 +105,7 @@ static void retrieve_data(size_t *err_count, uint8_t *data_xyz, char *postfix)
 	FAILSAFE_POST_OP("RZ");
 }
 
-void LIS302DL_run_test(void)
+int LIS302DL_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("LIS302DL Accel");
@@ -129,13 +129,17 @@ void LIS302DL_run_test(void)
 		display_write_data_byte('0' + err_count / 10 % 10);
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq(" errs");
+
+		return 1;
 	} else {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK");
+
+		return 0;
 	}
 }
 
-void LIS302DL_run_test_dynamic(void)
+int LIS302DL_run_test_dynamic(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("LIS302DL Accel D");
@@ -159,8 +163,12 @@ void LIS302DL_run_test_dynamic(void)
 		display_write_data_byte('0' + err_count / 10 % 10);
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq(" errs");
+
+		return 1;
 	} else {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK");
+
+		return 0;
 	}
 }

Core/Src/LSM9DS1.c

@@ -52,7 +52,7 @@ static void print_error_magnet(HAL_StatusTypeDef result, size_t *err_count, size
 	print_error_message(result, err_count, t, prefix);
 }
 
-void LSM9DS1_test_accel(void)
+int LSM9DS1_test_accel(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("LSM9DS1 Accel");
@@ -84,11 +84,15 @@ void LSM9DS1_test_accel(void)
 	if (!err_count) {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK");
+
+		return 0;
 	} else {
 		DISPLAY_SET_CURSOR(1, 0);
 		display_write_data_byte('0' + ((err_count / 10) % 10));
 		display_write_data_byte('0' + (err_count % 10));
 		display_write_data_seq(" errors");
+
+		return 1;
 	}
 }
 
@@ -99,7 +103,7 @@ void LSM9DS1_cleanup_accel(void)
 	HAL_I2C_Master_Transmit(&hi2c1, 0xD6, buffer, 2, 1000);
 }
 
-void LSM9DS1_test_magnet(void)
+int LSM9DS1_test_magnet(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("LSM9DS1 Magnet");
@@ -122,10 +126,14 @@ void LSM9DS1_test_magnet(void)
 	if (!err_count) {
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_seq("OK");
+
+		return 0;
 	} else {
 		DISPLAY_SET_CURSOR(1, 0);
 		display_write_data_byte('0' + ((err_count / 10) % 10));
 		display_write_data_byte('0' + (err_count % 10));
 		display_write_data_seq(" errors");
+
+		return 1;
 	}
 }

Core/Src/MP45DT02.c

@@ -6,7 +6,7 @@
 
 extern I2S_HandleTypeDef hi2s2;
 
-void MP45DT02_run_test(void)
+int MP45DT02_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("MP45DT02 Mic");
@@ -30,7 +30,7 @@ void MP45DT02_run_test(void)
 					display_write_data_seq(" full 0 samples");
 				}
 
-				return;
+				return 0;
 			}
 
 		// if ended up here, then no samples equaled to 1; that is not a good sign
@@ -50,4 +50,6 @@ void MP45DT02_run_test(void)
 
 	DISPLAY_SET_CURSOR(1, 0);
 	display_write_data_seq("No good samples!");
+
+	return 1;
 }

Core/Src/PCA9685.c

@@ -4,7 +4,7 @@
 
 extern I2C_HandleTypeDef hi2c1;
 
-void PCA9685_run_test(void)
+int PCA9685_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("PCA9685 PWM");
@@ -68,9 +68,13 @@ void PCA9685_run_test(void)
 		display_write_data_byte('0' + err_count / 10 % 10);
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq(" errors");
+
+		return 1;
 	} else {
 		DISPLAY_SET_CURSOR(1, 1);
-		display_write_data_seq("OK  OUT ENABLED");
+		display_write_data_seq("OK");
+
+		return 0;
 	}
 }
 

Core/Src/SST25VF016B.c

@@ -4,13 +4,14 @@
 
 extern SPI_HandleTypeDef hspi1;
 
-void SST25VF016B_run_test(void)
+int SST25VF016B_run_test(void)
 {
 	DISPLAY_CLEAR;
 	display_write_data_seq("SST25VF016B Flas");
 
 	HAL_StatusTypeDef op_result;
 	size_t err_count = 0;
+	size_t chip_id_fault = 0;
 
 	uint8_t tx_buffer[8] = {0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 	uint8_t rx_buffer[9];
@@ -46,8 +47,6 @@ void SST25VF016B_run_test(void)
 				display_write_data_seq("TIMEOUT");
 				break;
 			}
-
-			HAL_Delay(2000);
 		} else {
 			break;
 		}
@@ -62,6 +61,8 @@ void SST25VF016B_run_test(void)
 		DISPLAY_SET_CURSOR(1, 1);
 		display_write_data_byte('0' + err_count % 10);
 		display_write_data_seq(" Errors");
+
+		return 1;
 	} else {
 		for (size_t i = 0; i < 4; i += 2) {
 			// odd reads MUST result in 0xBF
@@ -70,6 +71,9 @@ void SST25VF016B_run_test(void)
 				display_write_data_byte('B');
 				display_write_data_byte('1'+i);
 				display_write_data_seq(" WRONG");
+
+				chip_id_fault = 1;
+
 				goto write_retrieved_data;
 			}
 		}
@@ -81,6 +85,9 @@ void SST25VF016B_run_test(void)
 				display_write_data_byte('B');
 				display_write_data_byte('1'+i);
 				display_write_data_seq(" WRONG");
+
+				chip_id_fault = 1;
+
 				goto write_retrieved_data;
 			}
 		}
@@ -94,4 +101,6 @@ void SST25VF016B_run_test(void)
 	display_write_data_seq((char *) &(rx_buffer[4]));
 
 	HAL_GPIO_WritePin(GPIOD, GPIO_PIN_7, GPIO_PIN_SET);
+
+	return (err_count || chip_id_fault);
 }

Core/Src/lcd.c

@@ -2,8 +2,21 @@
 #include "lcd.h"
 #include "generic_macros.h"
 
+static char display_framebuffer[16*2*DISPLAY_FRAMES_AVAILABLE];
+size_t display_current_frame;
+static size_t display_framebuffer_mode;
+
+static struct Display_emu_state des;
+
 void display_init(void)
 {
+	// prepare virtual framebuffer
+	display_current_frame = 0;
+	display_framebuffer_mode = 0;
+	des.cursor_offset = 0;
+	des.next = 0;
+	memset(display_framebuffer, 0x20, 16*2*DISPLAY_FRAMES_AVAILABLE);
+
 	// switch to 4-bit 2-line mode
 	display_write_instruction_byte(0x28);
 
@@ -17,7 +30,17 @@ void display_init(void)
 	display_write_instruction_byte(0x80);
 }
 
-uint8_t display_read_status(void)
+void display_to_framebuffer(void)
+{
+	display_framebuffer_mode = 1;
+}
+
+void display_to_direct(void)
+{
+	display_framebuffer_mode = 0;
+}
+
+static uint8_t display_read_status(void)
 {
 	// make sure GPIOE is in correct mode
 	GPIOE->MODER = 0x00504000;
@@ -43,7 +66,7 @@ uint8_t display_read_status(void)
 	return status;
 }
 
-void display_write_instruction_byte(uint8_t code)
+static void display_write_instruction_byte_direct(uint8_t code)
 {
 	DISPLAY_POLL_UNTIL_READY;
 
@@ -62,7 +85,37 @@ void display_write_instruction_byte(uint8_t code)
 	GPIOE->BSRR = (DISPLAY_ENA << 16);
 }
 
-void display_write_data_byte(uint8_t code)
+static void display_write_instruction_byte_framebuffer(uint8_t code)
+{
+	// emulate physical display behavior on receiving instructions
+	if (code & 0x80) {
+		// decode new cursor offset
+		size_t offset = ((code & 0x40) >> 2) | (code & 0xF);
+		des.cursor_offset = offset;
+	} else if (code == 0x01) {
+		// reset screen
+		memset(&(display_framebuffer[16*2*display_current_frame]), 0x20, 16*2);
+		des.cursor_offset = 0;
+		des.next = 0;
+	} else if (code == 0x06) {
+		// set increment mode
+		des.next = 0;
+	} else if (code == 0x04) {
+		// set decrement mode
+		des.next = 1;
+	}
+}
+
+void display_write_instruction_byte(uint8_t code)
+{
+	if (display_framebuffer_mode) {
+		display_write_instruction_byte_framebuffer(code);
+	} else {
+		display_write_instruction_byte_direct(code);
+	}
+}
+
+static void display_write_data_byte_direct(uint8_t code)
 {
 	DISPLAY_POLL_UNTIL_READY;
 
@@ -81,12 +134,51 @@ void display_write_data_byte(uint8_t code)
 	GPIOE->BSRR = DISPLAY_ENA << 16;
 }
 
+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;
+}
+
+void display_write_data_byte(uint8_t code)
+{
+	if (display_framebuffer_mode) {
+		display_write_data_byte_framebuffer(code);
+	} else {
+		display_write_data_byte_direct(code);
+	}
+}
+
 void display_write_data_seq(char *codes)
 {
 	for (size_t i = 0; i < 16; i++) {
-		if (codes[i] != 0)
+		if (codes[i])
 			display_write_data_byte(codes[i]);
 		else
 			break;
 	}
 }
+
+void display_load(uint32_t frame_no)
+{
+	if (display_framebuffer_mode)
+		return;
+
+	DISPLAY_CLEAR;
+
+	for (uint32_t i = 0; i < 16; i++) {
+		display_write_data_byte_direct(display_framebuffer[16*2*display_current_frame + i]);
+	}
+
+	DISPLAY_SET_CURSOR(1, 0);
+
+	for (uint32_t i = 0; i < 16; i++) {
+		display_write_data_byte_direct(display_framebuffer[16*2*display_current_frame + i + 16]);
+	}
+}

Core/Src/main.c

@@ -30,7 +30,6 @@
 #include "CS43L22.h"
 #include "SST25VF016B.h"
 #include "LIS302DL.h"
-#include "DHT11.h"
 #include "MP45DT02.h"
 #include "LSM9DS1.h"
 
@@ -47,6 +46,17 @@
 #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 -------------------------------------------------------------*/
@@ -65,25 +75,23 @@ SPI_HandleTypeDef hspi1;
 
 TIM_HandleTypeDef htim2;
 
+extern size_t display_current_frame;
+
 /* USER CODE BEGIN PV */
 
-void ((*executors[])(void)) = {
+static const 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,
+		LSM9DS1_test_magnet
-		DHT11_run_test
 };
 
-void ((*cleanup_functions[])(void)) = {
+static const void ((*cleanup_functions[])(void)) = {
-		NULL,
 		NULL,
 		PCA9685_cleanup,
 		NULL,
@@ -91,31 +99,10 @@ void ((*cleanup_functions[])(void)) = {
 		NULL,
 		NULL,
 		NULL,
-		NULL,
 		LSM9DS1_cleanup_accel,
-		NULL,
 		NULL
 };
 
-int delay_between_runs[] = {
-		250,
-		250,
-		-1,
-		-1,
-		-1,
-		-1,
-		-1,
-		200,
-		-1,
-		-1,
-		-1,
-		-1
-		};
-
-size_t current_executor_id = 11;
-
-size_t buttons_interrupt_enabled;
-
 /* USER CODE END PV */
 
 /* Private function prototypes -----------------------------------------------*/
@@ -133,67 +120,7 @@ static void MX_I2S2_Init(void);
 /* Private user code ---------------------------------------------------------*/
 /* USER CODE BEGIN 0 */
 
-void switch_to_next_test(void)
+static void button_init_and_test(void)
-{
-	current_executor_id += 1;
-	current_executor_id %= 12;
-}
-
-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:");
@@ -203,11 +130,11 @@ void button_init_and_test(void)
 	size_t pressed_elements;
 
 	uint32_t sw_button_locations[5][2] = {
-			{GPIOC, GPIO_PIN_11},
+			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_11},
-			{GPIOA, GPIO_PIN_15},
+			{(uint32_t) GPIOA, (uint32_t) GPIO_PIN_15},
-			{GPIOC, GPIO_PIN_9},
+			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_9},
-			{GPIOC, GPIO_PIN_6},
+			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_6},
-			{GPIOC, GPIO_PIN_8}
+			{(uint32_t) GPIOC, (uint32_t) GPIO_PIN_8}
 	};
 
 	do {
@@ -228,7 +155,7 @@ void button_init_and_test(void)
 		for (size_t i = 0; i < 5; i++) {
 			pressed_elements >>= 1;
 
-			size_t input = !HAL_GPIO_ReadPin(sw_button_locations[i][0], sw_button_locations[i][1]);
+			size_t input = !HAL_GPIO_ReadPin((GPIO_TypeDef *) sw_button_locations[i][0], sw_button_locations[i][1]);
 
 			if (input) {
 				pressed_elements |= 0x20;
@@ -245,16 +172,16 @@ void button_init_and_test(void)
 	display_write_data_seq("Release buttons");
 
 	GPIOD->ODR = 0x1000;
-	HAL_Delay(500);
+	HAL_Delay(300);
 	GPIOD->ODR = 0x2000;
-	HAL_Delay(500);
+	HAL_Delay(300);
 	GPIOD->ODR = 0x4000;
-	HAL_Delay(500);
+	HAL_Delay(300);
 	GPIOD->ODR = 0x8000;
-	HAL_Delay(500);
+	HAL_Delay(300);
 
-	// waiting for control buttons to be released
+	// waiting for all buttons to be released
-	WAIT_UNTIL_CB_RELEASED;
+	WAIT_UNTIL_ALL_BUTTONS_RELEASED;
 	GPIOD->ODR = 0x0000;
 	HAL_Delay(200);
 }
@@ -296,7 +223,6 @@ 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;
@@ -308,34 +234,91 @@ int main(void)
   GPIOD->ODR = 0xF000;
   button_init_and_test();
 
+  // perform all tests
+  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_CLEAR;
+	  display_write_data_seq("Testing...");
+
+	  DISPLAY_SET_CURSOR(1, 2);
+	  display_write_data_seq("P:");
+	  display_write_data_byte('0' + (successful_tests / 10) % 10);
+	  display_write_data_byte('0' + (successful_tests) % 10);
+
+	  DISPLAY_SET_CURSOR(1, 10);
+	  display_write_data_seq("F:");
+	  display_write_data_byte('0' + (failed_tests / 10) % 10);
+	  display_write_data_byte('0' + (failed_tests) % 10);
+
+	  display_to_framebuffer();
+
+	  // test
+	  if (executors[display_current_frame-1]())
+		  failed_tests++;
+	  else
+		  successful_tests++;
+
+	  // cleanup (if required)
+	  if (cleanup_functions[display_current_frame-1])
+		  cleanup_functions[display_current_frame-1]();
+
+	  display_to_direct();
+  }
+
+  // render final result to first framebuffer
+  display_to_framebuffer();
+  display_current_frame = 0;
+
+  DISPLAY_CLEAR;
+  display_write_data_seq("All tests done!");
+
+  DISPLAY_SET_CURSOR(1, 2);
+  display_write_data_seq("P:");
+  display_write_data_byte('0' + (successful_tests / 10) % 10);
+  display_write_data_byte('0' + (successful_tests) % 10);
+
+  DISPLAY_SET_CURSOR(1, 10);
+  display_write_data_seq("F:");
+  display_write_data_byte('0' + (failed_tests / 10) % 10);
+  display_write_data_byte('0' + (failed_tests) % 10);
+
+  display_to_direct();
+
   /* USER CODE END 2 */
 
   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
-  while (1)
+  while (1) {
-  {
+	  WAIT_UNTIL_ALL_BUTTONS_RELEASED;
-	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]();
+	  display_load(display_current_frame);
 
-	if (delay_between_runs[current_executor_id] == -1) {
+	  while (1) {
-		WAIT_UNTIL_CB_PRESSED;
+		  // go to next report
-		HAL_Delay(150);
+		  if (UB || SWT1 || SWT5) {
-		GPIOD->BSRR = 0x1000;
+			  display_current_frame += 1;
+			  display_current_frame %= LEN(executors)+1;
+			  break;
+		  }
 
-		WAIT_UNTIL_CB_RELEASED;
+		  // go to previous report
-		HAL_Delay(150);
+		  else if (SWT3 || SWT4) {
-		GPIOD->BSRR = 0x1000 << 16;
+			  display_current_frame -= 1;
 
-		if (cleanup_functions[current_executor_id])
+			  if ((int) display_current_frame == -1)
-			cleanup_functions[current_executor_id]();
+				  display_current_frame = LEN(executors);
 
-		switch_to_next_test();
+			  break;
-	} else {
+		  }
-		HAL_Delay(delay_between_runs[current_executor_id]);
+
+		  // return to summary frame
+		  else if (SWT2) {
+			  display_current_frame = 0;
+			  break;
+		  }
 	  }
     /* USER CODE END WHILE */
 
@@ -641,17 +624,10 @@ static void MX_GPIO_Init(void)
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
   HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
 
-  /*Configure GPIO pin : PD11 */
+  /*Configure GPIO pins : PD11 PD12 PD13 PD14
-  GPIO_InitStruct.Pin = GPIO_PIN_11;
+                           PD15 PD4 PD7 */
-  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
+                          |GPIO_PIN_15|GPIO_PIN_4|GPIO_PIN_7;
-  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
-  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
-
-  /*Configure GPIO pins : PD12 PD13 PD14 PD15
-                           PD4 PD7 */
-  GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15
-                          |GPIO_PIN_4|GPIO_PIN_7;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

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");
 

Debug/Core/Src/subdir.mk

@@ -7,7 +7,6 @@
 C_SRCS += \
 ../Core/Src/24AA02E48.c \
 ../Core/Src/CS43L22.c \
-../Core/Src/DHT11.c \
 ../Core/Src/DNI.c \
 ../Core/Src/LIS302DL.c \
 ../Core/Src/LSM9DS1.c \
@@ -25,7 +24,6 @@ C_SRCS += \
 OBJS += \
 ./Core/Src/24AA02E48.o \
 ./Core/Src/CS43L22.o \
-./Core/Src/DHT11.o \
 ./Core/Src/DNI.o \
 ./Core/Src/LIS302DL.o \
 ./Core/Src/LSM9DS1.o \
@@ -43,7 +41,6 @@ OBJS += \
 C_DEPS += \
 ./Core/Src/24AA02E48.d \
 ./Core/Src/CS43L22.d \
-./Core/Src/DHT11.d \
 ./Core/Src/DNI.d \
 ./Core/Src/LIS302DL.d \
 ./Core/Src/LSM9DS1.d \
@@ -66,7 +63,7 @@ Core/Src/%.o Core/Src/%.su Core/Src/%.cyclo: ../Core/Src/%.c Core/Src/subdir.mk
 clean: clean-Core-2f-Src
 
 clean-Core-2f-Src:
-	-$(RM) ./Core/Src/24AA02E48.cyclo ./Core/Src/24AA02E48.d ./Core/Src/24AA02E48.o ./Core/Src/24AA02E48.su ./Core/Src/CS43L22.cyclo ./Core/Src/CS43L22.d ./Core/Src/CS43L22.o ./Core/Src/CS43L22.su ./Core/Src/DHT11.cyclo ./Core/Src/DHT11.d ./Core/Src/DHT11.o ./Core/Src/DHT11.su ./Core/Src/DNI.cyclo ./Core/Src/DNI.d ./Core/Src/DNI.o ./Core/Src/DNI.su ./Core/Src/LIS302DL.cyclo ./Core/Src/LIS302DL.d ./Core/Src/LIS302DL.o ./Core/Src/LIS302DL.su ./Core/Src/LSM9DS1.cyclo ./Core/Src/LSM9DS1.d ./Core/Src/LSM9DS1.o ./Core/Src/LSM9DS1.su ./Core/Src/MP45DT02.cyclo ./Core/Src/MP45DT02.d ./Core/Src/MP45DT02.o ./Core/Src/MP45DT02.su ./Core/Src/PCA9685.cyclo ./Core/Src/PCA9685.d ./Core/Src/PCA9685.o ./Core/Src/PCA9685.su ./Core/Src/SST25VF016B.cyclo ./Core/Src/SST25VF016B.d ./Core/Src/SST25VF016B.o ./Core/Src/SST25VF016B.su ./Core/Src/lcd.cyclo ./Core/Src/lcd.d ./Core/Src/lcd.o ./Core/Src/lcd.su ./Core/Src/main.cyclo ./Core/Src/main.d ./Core/Src/main.o ./Core/Src/main.su ./Core/Src/stm32f4xx_hal_msp.cyclo ./Core/Src/stm32f4xx_hal_msp.d ./Core/Src/stm32f4xx_hal_msp.o ./Core/Src/stm32f4xx_hal_msp.su ./Core/Src/stm32f4xx_it.cyclo ./Core/Src/stm32f4xx_it.d ./Core/Src/stm32f4xx_it.o ./Core/Src/stm32f4xx_it.su ./Core/Src/syscalls.cyclo ./Core/Src/syscalls.d ./Core/Src/syscalls.o ./Core/Src/syscalls.su ./Core/Src/sysmem.cyclo ./Core/Src/sysmem.d ./Core/Src/sysmem.o ./Core/Src/sysmem.su ./Core/Src/system_stm32f4xx.cyclo ./Core/Src/system_stm32f4xx.d ./Core/Src/system_stm32f4xx.o ./Core/Src/system_stm32f4xx.su
+	-$(RM) ./Core/Src/24AA02E48.cyclo ./Core/Src/24AA02E48.d ./Core/Src/24AA02E48.o ./Core/Src/24AA02E48.su ./Core/Src/CS43L22.cyclo ./Core/Src/CS43L22.d ./Core/Src/CS43L22.o ./Core/Src/CS43L22.su ./Core/Src/DNI.cyclo ./Core/Src/DNI.d ./Core/Src/DNI.o ./Core/Src/DNI.su ./Core/Src/LIS302DL.cyclo ./Core/Src/LIS302DL.d ./Core/Src/LIS302DL.o ./Core/Src/LIS302DL.su ./Core/Src/LSM9DS1.cyclo ./Core/Src/LSM9DS1.d ./Core/Src/LSM9DS1.o ./Core/Src/LSM9DS1.su ./Core/Src/MP45DT02.cyclo ./Core/Src/MP45DT02.d ./Core/Src/MP45DT02.o ./Core/Src/MP45DT02.su ./Core/Src/PCA9685.cyclo ./Core/Src/PCA9685.d ./Core/Src/PCA9685.o ./Core/Src/PCA9685.su ./Core/Src/SST25VF016B.cyclo ./Core/Src/SST25VF016B.d ./Core/Src/SST25VF016B.o ./Core/Src/SST25VF016B.su ./Core/Src/lcd.cyclo ./Core/Src/lcd.d ./Core/Src/lcd.o ./Core/Src/lcd.su ./Core/Src/main.cyclo ./Core/Src/main.d ./Core/Src/main.o ./Core/Src/main.su ./Core/Src/stm32f4xx_hal_msp.cyclo ./Core/Src/stm32f4xx_hal_msp.d ./Core/Src/stm32f4xx_hal_msp.o ./Core/Src/stm32f4xx_hal_msp.su ./Core/Src/stm32f4xx_it.cyclo ./Core/Src/stm32f4xx_it.d ./Core/Src/stm32f4xx_it.o ./Core/Src/stm32f4xx_it.su ./Core/Src/syscalls.cyclo ./Core/Src/syscalls.d ./Core/Src/syscalls.o ./Core/Src/syscalls.su ./Core/Src/sysmem.cyclo ./Core/Src/sysmem.d ./Core/Src/sysmem.o ./Core/Src/sysmem.su ./Core/Src/system_stm32f4xx.cyclo ./Core/Src/system_stm32f4xx.d ./Core/Src/system_stm32f4xx.o ./Core/Src/system_stm32f4xx.su
 
 .PHONY: clean-Core-2f-Src
 

Debug/objects.list

@@ -1,6 +1,5 @@
 "./Core/Src/24AA02E48.o"
 "./Core/Src/CS43L22.o"
-"./Core/Src/DHT11.o"
 "./Core/Src/DNI.o"
 "./Core/Src/LIS302DL.o"
 "./Core/Src/LSM9DS1.o"

test1.ioc

@@ -121,8 +121,6 @@ PC8.Locked=true
 PC8.Signal=GPIO_Input
 PC9.Locked=true
 PC9.Signal=GPIO_Input
-PD11.GPIOParameters=GPIO_Speed
-PD11.GPIO_Speed=GPIO_SPEED_FREQ_VERY_HIGH
 PD11.Locked=true
 PD11.Signal=GPIO_Output
 PD12.Locked=true