Convert IMU to IRQ for rotation

This moves the rotation detection to use the IRQ2 line. Fixes #44

workspace/ts100/inc/Interrupt.h

@@ -25,6 +25,10 @@ inline uint16_t getRawButtons() {
 	return rawKeys;
 }
 
+extern volatile uint8_t RotationChangedFlag;
+
+
+
 /*IRQ prototypes*/
 void NMI_Handler(void);
 void HardFault_Handler(void);

workspace/ts100/src/Bios.c

@@ -5,7 +5,6 @@
 #include "Bios.h"
 #include "I2C.h"
 
-
 #define ADC1_DR_Address    ((u32)0x4001244C)
 volatile uint32_t gHeat_cnt = 0;
 
@@ -92,8 +91,13 @@ void GPIO_Config(void) {
 	GPIO_Init(GPIOA, &GPIO_InitStructure);
 
 	//--------INT 1 == PB5 -------------------------------------------------//
-	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
-	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//pullup just in case something resets the accel
+	GPIO_InitStructure.GPIO_Pin = INT1_PIN;
+	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //pullup just in case something resets the accel
+	GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+	//--------INT 2 == PB3 -------------------------------------------------//
+	GPIO_InitStructure.GPIO_Pin = INT2_PIN;
+	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //pullup just in case something resets the accel
 	GPIO_Init(GPIOB, &GPIO_InitStructure);
 
 }
@@ -211,7 +215,8 @@ void Init_EXTI(void) {
 	GPIO_PinSource5);     //PB5 == accelerometer
 
 	/* Configure EXTI5/6/9 line */
-	EXTI_InitStructure.EXTI_Line = EXTI_Line5 | EXTI_Line6 | EXTI_Line9;
+	EXTI_InitStructure.EXTI_Line = EXTI_Line5 | EXTI_Line6 | EXTI_Line9
+			| EXTI_Line3;
 	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
 	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; //trigger on up and down
 	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
@@ -224,6 +229,13 @@ void Init_EXTI(void) {
 	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 	NVIC_Init(&NVIC_InitStructure);
 
+	/* Enable and set EXTI9_5 Interrupt to the lowest priority */
+	NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
+	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
+	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
+	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+	NVIC_Init(&NVIC_InitStructure);
+
 }
 //Start the system watchdog with a timeout specified
 //Note you cannot turn this off once you turn it on

workspace/ts100/src/Interrupt.c

@@ -8,6 +8,7 @@ volatile uint32_t AkeyChange;
 volatile uint8_t rawKeys;
 volatile uint8_t LongKeys;
 volatile uint32_t lastMovement; //millis() at last movement event
+volatile uint8_t RotationChangedFlag;
 
 //Delay in milliseconds using systemTick
 void delayMs(uint32_t ticks) {
@@ -161,6 +162,12 @@ void EXTI9_5_IRQHandler(void) {
 	}
 
 }
+void EXTI3_IRQHandler(void) {
+	if (EXTI_GetITStatus(EXTI_Line3) != RESET) {	//Orientation Change
+		RotationChangedFlag = 1;
+		EXTI_ClearITPendingBit(EXTI_Line3);
+	}
+}
 
 /*********************** UNUSED IRQ *****************************************/
 void WWDG_IRQHandler(void) {
@@ -181,8 +188,7 @@ void EXTI1_IRQHandler(void) {
 }
 void EXTI2_IRQHandler(void) {
 }
-void EXTI3_IRQHandler(void) {
-}
+
 void EXTI4_IRQHandler(void) {
 }
 void DMA1_Channel1_IRQHandler(void) {

workspace/ts100/src/MMA8652FC.c

@@ -44,7 +44,7 @@ void StartUp_Accelerometer(uint8_t sensitivity) {
 	I2C_RegisterWrite( CTRL_REG2, 0x40);	// Reset all registers to POR values
 	delayMs(2);		// ~1ms delay
 	I2C_RegisterWrite(FF_MT_CFG_REG, 0x78);	// Enable motion detection for X and Y axis, latch enabled
-	uint8_t sens = 9 * 6 + 5;
+	uint8_t sens = 9 * 6 + 3;
 	sens -= 6 * sensitivity;
 
 	I2C_RegisterWrite(FF_MT_THS_REG, 0x80 | sens);		// Set threshold
@@ -52,9 +52,9 @@ void StartUp_Accelerometer(uint8_t sensitivity) {
 	I2C_RegisterWrite(PL_CFG_REG, 0x40);	//Enable the orientation detection
 	I2C_RegisterWrite(PL_COUNT_REG, 200);	//200 count debounce
 	I2C_RegisterWrite(PL_BF_ZCOMP_REG, 0b01000111);	//Set the threshold to 42 degrees
-	I2C_RegisterWrite(P_L_THS_REG, 0b10011100);//Up the trip angles
-	I2C_RegisterWrite( CTRL_REG4, 0x04);		// Enable motion interrupt
-	I2C_RegisterWrite( CTRL_REG5, 0x04);// Route motion interrupts to INT1 ->PB5 ->EXTI5
+	I2C_RegisterWrite(P_L_THS_REG, 0b10011100);	//Up the trip angles
+	I2C_RegisterWrite( CTRL_REG4, 0x04 | (1<<4));	// Enable motion interrupt & orientation interrupt
+	I2C_RegisterWrite( CTRL_REG5, 0x04);// Route motion interrupts to INT1 ->PB5 ->EXTI5, leaving orientation routed to INT2
 	I2C_RegisterWrite( CTRL_REG1, 0x11);		// ODR=800 Hz, Active mode
 
 }

workspace/ts100/src/Main.c

@@ -14,17 +14,33 @@ void setup();
 
 int main(void) {
 	setup();/*Setup the system*/
-	if(systemSettings.autoStart)
+	if (systemSettings.autoStart)
 		operatingMode = SOLDERING;
 	while (1) {
 		Clear_Watchdog(); //reset the Watch dog timer
 		ProcessUI();
 		DrawUI();
-		delayMs(30); //Slow the system down a little bit
+		delayMs(15); //Slow the system down waiting for the iron.
+
+		if (systemSettings.OrientationMode == 2) {
+			//Automatic mode
+			if (RotationChangedFlag) {
+				OLED_SetOrientation(!getOrientation());
+				RotationChangedFlag = 0;
+			}
+
+			if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_3) == Bit_RESET) {
+				OLED_SetOrientation(!getOrientation());
+				RotationChangedFlag = 0;
+				//^ This is a workaround for the IRQ being set off before we have the handler setup and enabled.
+			}
+		}
 		if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_5) == Bit_RESET) {
 			lastMovement = millis();
 			//This is a workaround for the line staying low as the user is still moving. (ie sensitivity is too high for their amount of movement)
 		}
+		delayMs(15); //Slow the system down waiting for the iron.
+
 	}
 }
 void setup() {
@@ -41,7 +57,7 @@ void setup() {
 	setupPID(); 										//Init the PID values
 	readIronTemp(systemSettings.tempCalibration, 0, 0); //load the default calibration value
 	if (systemSettings.OrientationMode == 2)
-		Init_Oled(0); 									//Init the OLED display in RH mode, since accel wont have started up yet
+		Init_Oled(0); //Init the OLED display in RH mode, since accel wont have started up yet
 	else
 		Init_Oled(systemSettings.OrientationMode); 		//Init the OLED display
 

workspace/ts100/src/Modes.c

@@ -414,10 +414,7 @@ void DrawUI() {
 	static uint16_t lastSolderingDrawnTemp2 = 0;
 	static uint8_t settingsLongTestScrollPos = 0;
 	uint16_t temp = readIronTemp(0, 0, 0xFFFF);
-	if (systemSettings.OrientationMode == 2) {
-		//Automatic mode
-		OLED_SetOrientation(!getOrientation());
-	}
+
 	switch (operatingMode) {
 	case STARTUP:
 		//We are chilling in the idle mode