Partial Merge

Knob Driver to be rewritten

lib/ES_CAN/ES_CAN.cpp

@@ -1,214 +0,0 @@
-#include <stm32l4xx_hal_can.h>
-#include <stm32l4xx_hal_rcc.h>
-#include <stm32l4xx_hal_gpio.h>
-#include <stm32l4xx_hal_cortex.h>
-
-//Overwrite the weak default IRQ Handlers and callabcks
-extern "C" void CAN1_RX0_IRQHandler(void);
-extern "C" void CAN1_TX_IRQHandler(void);
-
-//Pointer to user ISRS
-void (*CAN_RX_ISR)() = NULL;
-void (*CAN_TX_ISR)() = NULL;
-
-//CAN handle struct with initialisation parameters
-//Timing from http://www.bittiming.can-wiki.info/ with bit rate = 125kHz and clock frequency = 80MHz
-CAN_HandleTypeDef CAN_Handle = {
-    CAN1,
-    {
-        40,           //Prescaler
-        CAN_MODE_NORMAL,     //Normal/loopback/silent mode
-        CAN_SJW_2TQ,  //SyncJumpWidth
-        CAN_BS1_13TQ, //TimeSeg1
-        CAN_BS2_2TQ,  //TimeSeg2
-        DISABLE,      //TimeTriggeredMode
-        DISABLE,      //AutoBusOff
-        ENABLE,       //AutoWakeUp
-        ENABLE,       //AutoRetransmission
-        DISABLE,      //ReceiveFifoLocked
-        ENABLE        //TransmitFifoPriority
-    },
-    HAL_CAN_STATE_RESET,  //State
-    HAL_CAN_ERROR_NONE    //Error Code
-};
-
-
-//Initialise CAN dependencies: GPIO and clock
-void HAL_CAN_MspInit(CAN_HandleTypeDef* CAN_Handle) {
-
-  //Set up the pin initialisation
-  GPIO_InitTypeDef GPIO_InitCAN_TX = {
-    GPIO_PIN_12,            //PA12 is CAN TX
-    GPIO_MODE_AF_PP,        //Alternate function, push-pull driver
-    GPIO_NOPULL,            //No pull-up
-    GPIO_SPEED_FREQ_MEDIUM, //Medium slew rate
-    GPIO_AF9_CAN1           //Alternate function is CAN
-    };
-
-  GPIO_InitTypeDef GPIO_InitCAN_RX = {
-    GPIO_PIN_11,            //PA11 is CAN RX
-    GPIO_MODE_AF_PP,        //Alternate function, push-pull driver
-    GPIO_PULLUP,            //Pull-up enabled
-    GPIO_SPEED_FREQ_MEDIUM, //Medium slew rate
-    GPIO_AF9_CAN1           //Alternate function is CAN    
-    };
-
-  //Enable the CAN and GPIO clocks
-  __HAL_RCC_CAN1_CLK_ENABLE(); //Enable the CAN interface clock
-  __HAL_RCC_GPIOA_CLK_ENABLE(); //Enable the clock for the CAN GPIOs
-
-  //Initialise the pins
-  HAL_GPIO_Init(GPIOA, &GPIO_InitCAN_TX); //Configure CAN pin
-  HAL_GPIO_Init(GPIOA, &GPIO_InitCAN_RX); //Configure CAN pin
-}
-
-
-uint32_t CAN_Init(bool loopback=false) {
-  if (loopback)
-    CAN_Handle.Init.Mode = CAN_MODE_LOOPBACK;
-  return (uint32_t) HAL_CAN_Init(&CAN_Handle);
-}
-
-
-uint32_t setCANFilter(uint32_t filterID, uint32_t maskID, uint32_t filterBank) {
-
-  //Set up the filter definition
-  CAN_FilterTypeDef filterInfo = {
-    (filterID << 5) & 0xffe0,   //Filter ID
-    0,                          //Filter ID LSBs = 0
-    (maskID << 5) & 0xffe0,     //Mask MSBs
-    0,                          //Mask LSBs = 0
-    0,                          //FIFO selection
-    filterBank & 0xf,           //Filter bank selection
-    CAN_FILTERMODE_IDMASK,      //Mask mode
-    CAN_FILTERSCALE_32BIT,      //32 bit IDs
-    CAN_FILTER_ENABLE,          //Enable filter
-    0                           //uint32_t SlaveStartFilterBank
-  };
-
-  return (uint32_t) HAL_CAN_ConfigFilter(&CAN_Handle, &filterInfo);
-}
-
-
-uint32_t CAN_Start() {
-  return (uint32_t) HAL_CAN_Start(&CAN_Handle);
-}
-
-
-uint32_t CAN_TX(uint32_t ID, uint8_t data[8]) {
-
-  //Set up the message header
-  CAN_TxHeaderTypeDef txHeader = {
-    ID & 0x7ff,                 //Standard ID
-    0,                          //Ext ID = 0
-    CAN_ID_STD,                 //Use Standard ID
-    CAN_RTR_DATA,               //Data Frame
-    8,                          //Send 8 bytes
-    DISABLE                     //No time triggered mode
-  };
-
-  //Wait for free mailbox
-  while (!HAL_CAN_GetTxMailboxesFreeLevel(&CAN_Handle));
-
-  //Start the transmission
-  return (uint32_t) HAL_CAN_AddTxMessage(&CAN_Handle, &txHeader, data, NULL);
-}
-
-
-uint32_t CAN_CheckRXLevel() {
-  return HAL_CAN_GetRxFifoFillLevel(&CAN_Handle, 0);
-}
-
-
-uint32_t CAN_RX(uint32_t &ID, uint8_t data[8]) {
-  CAN_RxHeaderTypeDef rxHeader;
-
-  //Wait for message in FIFO
-  while (!HAL_CAN_GetRxFifoFillLevel(&CAN_Handle, 0));
-  
-  //Get the message from the FIFO
-  uint32_t result = (uint32_t) HAL_CAN_GetRxMessage(&CAN_Handle, 0, &rxHeader, data);
-
-  //Store the ID from the header
-  ID = rxHeader.StdId;
-
-  return result;
-}
-
-
-uint32_t CAN_RegisterRX_ISR(void(& callback)()) {
-  //Store pointer to user ISR
-  CAN_RX_ISR = &callback;
-
-  //Enable message received interrupt in HAL
-  uint32_t status = (uint32_t) HAL_CAN_ActivateNotification (&CAN_Handle, CAN_IT_RX_FIFO0_MSG_PENDING);
-
-  //Switch on the interrupt
-  HAL_NVIC_SetPriority (CAN1_RX0_IRQn, 6, 0);
-  HAL_NVIC_EnableIRQ (CAN1_RX0_IRQn);
-
-  return status;
-}
-
-
-uint32_t CAN_RegisterTX_ISR(void(& callback)()) {
-  //Store pointer to user ISR
-  CAN_TX_ISR = &callback;
-
-  //Enable message received interrupt in HAL
-  uint32_t status = (uint32_t) HAL_CAN_ActivateNotification (&CAN_Handle, CAN_IT_TX_MAILBOX_EMPTY);
-
-  //Switch on the interrupt
-  HAL_NVIC_SetPriority (CAN1_TX_IRQn, 6, 0);
-  HAL_NVIC_EnableIRQ (CAN1_TX_IRQn);
-
-  return status;
-}
-
-
-void HAL_CAN_RxFifo0MsgPendingCallback (CAN_HandleTypeDef * hcan){
-
-  //Call the user ISR if it has been registered
-  if (CAN_RX_ISR)
-    CAN_RX_ISR();
-}
-
-
-void HAL_CAN_TxMailbox0CompleteCallback (CAN_HandleTypeDef * hcan){
-
-  //Call the user ISR if it has been registered
-  if (CAN_TX_ISR)
-    CAN_TX_ISR();
-}
-
-
-void HAL_CAN_TxMailbox1CompleteCallback (CAN_HandleTypeDef * hcan){
-
-  //Call the user ISR if it has been registered
-  if (CAN_TX_ISR)
-    CAN_TX_ISR();
-}
-
-
-void HAL_CAN_TxMailbox2CompleteCallback (CAN_HandleTypeDef * hcan){
-
-  //Call the user ISR if it has been registered
-  if (CAN_TX_ISR)
-    CAN_TX_ISR();
-}
-
-
-//This is the base ISR at the interrupt vector
-void CAN1_RX0_IRQHandler(void){
-
-  //Use the HAL interrupt handler
-  HAL_CAN_IRQHandler(&CAN_Handle);
-}
-
-
-//This is the base ISR at the interrupt vector
-void CAN1_TX_IRQHandler(void){
-
-  //Use the HAL interrupt handler
-  HAL_CAN_IRQHandler(&CAN_Handle);
-}

lib/ES_CAN/ES_CAN.h

@@ -1,24 +0,0 @@
-//Initialise the CAN module
-uint32_t CAN_Init(bool loopback=false);
-
-//Enable the CAN module
-uint32_t CAN_Start();
-
-//Set up a recevie filter
-//Defaults to receive everything
-uint32_t setCANFilter(uint32_t filterID=0, uint32_t maskID=0, uint32_t filterBank=0);
-
-//Send a message
-uint32_t CAN_TX(uint32_t ID, uint8_t data[8]);
-
-//Get the number of received messages
-uint32_t CAN_CheckRXLevel();
-
-//Get a received message from the FIFO
-uint32_t CAN_RX(uint32_t &ID, uint8_t data[8]);
-
-//Set up an interrupt on received messages
-uint32_t CAN_RegisterRX_ISR(void(& callback)());
-
-//Set up an interrupt on transmitted messages
-uint32_t CAN_RegisterTX_ISR(void(& callback)());

src/main.cpp

@@ -5,23 +5,58 @@
 #include <knob>
 #include <string>
 
-volatile std::atomic<int32_t> currentStepSize;
+#pragma region Globals(Config values, Variables, Objects, Types, etc.)
-static std::atomic<uint8_t> keyArray[7];
+// Config values
-
 const uint32_t interval = 10;		 // Display update interval
 const uint8_t octave = 4;			 // Octave to start on
 const uint32_t samplingRate = 44100; // Sampling rate
+// Variables
+std::atomic<int32_t> currentStepSize;
+std::atomic<uint8_t> keyArray[7];
+// Objects
+U8G2_SSD1305_128X32_NONAME_F_HW_I2C u8g2(U8G2_R0); // Display driver object
+Knob K3 = Knob(0, 16);							   // Knob driver object
+// Program Specific Structures
 typedef struct {
 	int32_t stepSize;
 	std::string note;
 } Note;
 const Note notes[] = {
 	{0, "None"}, {3185014, "C1"}, {3374405, "C1#"}, {3575058, "D1"}, {3787642, "D1#"}, {4012867, "E1"}, {4251484, "F1"}, {4504291, "F1#"}, {4772130, "G1"}, {5055895, "G1#"}, {5356535, "A1"}, {5675051, "A1#"}, {6012507, "B1"}, {6370029, "C2"}, {6748811, "C2#"}, {7150116, "D2"}, {7575284, "D2#"}, {8025734, "E2"}, {8502969, "F2"}, {9008582, "F2#"}, {9544260, "G2"}, {10111791, "G2#"}, {10713070, "A2"}, {11350102, "A2#"}, {12025014, "B2"}, {12740059, "C3"}, {13497622, "C3#"}, {14300233, "D3"}, {15150569, "D3#"}, {16051469, "E3"}, {17005939, "F3"}, {18017164, "F3#"}, {19088521, "G3"}, {20223583, "G3#"}, {21426140, "A3"}, {22700205, "A3#"}, {24050029, "B3"}, {25480118, "C4"}, {26995245, "C4#"}, {28600466, "D4"}, {30301138, "D4#"}, {32102938, "E4"}, {34011878, "F4"}, {36034329, "F4#"}, {38177042, "G4"}, {40447167, "G4#"}, {42852281, "A4"}, {45400410, "A4#"}, {48100059, "B4"}, {50960237, "C5"}, {53990491, "C5#"}, {57200933, "D5"}, {60602277, "D5#"}, {64205876, "E5"}, {68023756, "F5"}, {72068659, "F5#"}, {76354085, "G5"}, {80894335, "G5#"}, {85704562, "A5"}, {90800821, "A5#"}, {96200119, "B5"}, {101920475, "C6"}, {107980982, "C6#"}, {114401866, "D6"}, {121204555, "D6#"}, {128411753, "E6"}, {136047513, "F6"}, {144137319, "F6#"}, {152708170, "G6"}, {161788670, "G6#"}, {171409125, "A6"}, {181601642, "A6#"}, {192400238, "B6"}, {203840951, "C7"}, {215961965, "C7#"}, {228803732, "D7"}, {242409110, "D7#"}, {256823506, "E7"}, {272095026, "F7"}, {288274638, "F7#"}, {305416340, "G7"}, {323577341, "G7#"}, {342818251, "A7"}, {363203285, "A7#"}, {384800476, "B7"}};
-#define icon_width 10
+enum waveform {
-#define icon_height 10
+	SQUARE = 0,
+	SAWTOOTH,
+	TRIANGLE,
+	SINE
+};
+const unsigned char waveforms[4][18] = {
+	{0x7f, 0x10, 0x41, 0x10, 0x41, 0x10, 0x41, 0x10, 0x41,
+	 0x10, 0x41, 0x10, 0x41, 0x10, 0x41, 0x10, 0xc1, 0x1f}, // Square Wave
+	{0x70, 0x10, 0x58, 0x18, 0x48, 0x08, 0x4c, 0x0c, 0x44,
+	 0x04, 0x46, 0x06, 0x42, 0x02, 0x43, 0x03, 0xc1, 0x01}, // Sawtooth Wave
+	{0x08, 0x00, 0x1c, 0x00, 0x36, 0x00, 0x63, 0x00, 0xc1,
+	 0x00, 0x80, 0x11, 0x00, 0x1b, 0x00, 0x0e, 0x00, 0x04}, // Triangle Wave
+	{0x1c, 0x00, 0x36, 0x00, 0x22, 0x00, 0x63, 0x00, 0x41,
+	 0x10, 0xc0, 0x18, 0x80, 0x08, 0x80, 0x0d, 0x00, 0x07} // Sine Wave
+};
+const unsigned char volumes[6][18] = {
+	{0x10, 0x02, 0x98, 0x04, 0x1c, 0x05, 0x5f, 0x09, 0x5f,
+	 0x09, 0x5f, 0x09, 0x1c, 0x05, 0x98, 0x04, 0x10, 0x02}, // volume max
+	{0x10, 0x00, 0x98, 0x00, 0x1c, 0x01, 0x5f, 0x01, 0x5f,
+	 0x01, 0x5f, 0x01, 0x1c, 0x01, 0x98, 0x00, 0x10, 0x00}, // volume mid higher
+	{0x10, 0x00, 0x18, 0x00, 0x1c, 0x01, 0x5f, 0x01, 0x5f,
+	 0x01, 0x5f, 0x01, 0x1c, 0x01, 0x18, 0x00, 0x10, 0x00}, // volume mid lower
+	{0x10, 0x00, 0x18, 0x00, 0x1c, 0x00, 0x5f, 0x00, 0x5f,
+	 0x00, 0x5f, 0x00, 0x1c, 0x00, 0x18, 0x00, 0x10, 0x00}, // volume low
+	{0x10, 0x00, 0x18, 0x00, 0x1c, 0x00, 0x1f, 0x00, 0x5f,
+	 0x00, 0x1f, 0x00, 0x1c, 0x00, 0x18, 0x00, 0x10, 0x00}, // volume lowest
+	{0x10, 0x00, 0x18, 0x00, 0x5c, 0x04, 0x9f, 0x02, 0x1f,
+	 0x01, 0x9f, 0x02, 0x5c, 0x04, 0x18, 0x00, 0x10, 0x00} // mute
+};
 const unsigned char icon_bits[] = {
 	0x00, 0x00, 0x00, 0x00, 0xcc, 0x00, 0xcc, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x02, 0x01, 0x02, 0x01, 0xfe, 0x01, 0x00, 0x00};
+#pragma endregion
 
 #pragma region Pin Definitions
 // Row select and enable
@@ -48,9 +83,6 @@ const int HKOW_BIT = 5;
 const int HKOE_BIT = 6;
 #pragma endregion
 
-U8G2_SSD1305_128X32_NONAME_F_HW_I2C u8g2(U8G2_R0); // Display driver object
-Knob K3 = Knob(0, 16);							   // Knob driver object
-
 // Function to set outputs using key matrix
 void setOutMuxBit(const uint8_t bitIdx, const bool value) {
 	digitalWrite(REN_PIN, LOW);
@@ -73,7 +105,7 @@ uint8_t readCols() {
 	return row;
 }
 
-// Set current row
+// Set multiplexer bits to select row
 void setRow(const uint8_t rowIdx) {
 	digitalWrite(REN_PIN, LOW);
 	digitalWrite(RA0_PIN, rowIdx & 0x01);
@@ -82,6 +114,7 @@ void setRow(const uint8_t rowIdx) {
 	digitalWrite(REN_PIN, HIGH);
 }
 
+// Returns key value (as notes[] index) of highest currently pressed key
 uint16_t getTopKey() {
 	uint16_t topKey = 0;
 	for (uint8_t i = 0; i < 3; i++) {
@@ -94,13 +127,15 @@ uint16_t getTopKey() {
 	return topKey;
 }
 
+// Interrupt driven routine to send waveform to DAC
 void sampleISR() {
 	static int32_t phaseAcc = 0;
 	phaseAcc += currentStepSize;
-	int32_t Vout = phaseAcc >> (32 - K3.getRotation() / 2);
+	int32_t Vout = phaseAcc >> (32 - K3.getRotation() / 2); // Volume range from (>> 32) to (>> 24), range of 8
 	analogWrite(OUTR_PIN, Vout + 128);
 }
 
+// Task to update keyArray values at a higher priority
 void scanKeysTask(void *pvParameters) {
 	const TickType_t xFrequency = 50 / portTICK_PERIOD_MS;
 	TickType_t xLastWakeTime = xTaskGetTickCount();
@@ -116,14 +151,16 @@ void scanKeysTask(void *pvParameters) {
 	}
 }
 
+// Task containing display graphics and update code
 void displayUpdateTask(void *pvParameters) {
 	const TickType_t xFrequency = 100 / portTICK_PERIOD_MS;
 	TickType_t xLastWakeTime = xTaskGetTickCount();
 	while (1) {
 		vTaskDelayUntil(&xLastWakeTime, xFrequency);
-		u8g2.clearBuffer();									  // clear the internal memory
+		u8g2.clearBuffer();					  // clear the internal memory
-		u8g2.setFont(u8g2_font_profont12_mf);				  // choose a suitable font
+		u8g2.setFont(u8g2_font_profont12_mf); // choose a suitable font
-		u8g2.drawStr(2, 10, notes[getTopKey()].note.c_str()); // Print the current key
+		uint16_t key = getTopKey();
+		u8g2.drawStr(2, 10, notes[key].note.c_str()); // Print the current key
 		digitalToggle(LED_BUILTIN);
 		u8g2.setCursor(2, 20);
 		for (uint8_t i = 0; i < 7; i++) {
@@ -160,17 +197,16 @@ void setup() {
 	u8g2.begin();
 	setOutMuxBit(DEN_BIT, HIGH); // Enable display power supply
 #pragma endregion
-
+#pragma region UART Setup
-	// Initialise UART
 	Serial.begin(115200);
 	Serial.println("Hello World");
-
+#pragma endregion
+#pragma region Task Scheduler Setup
 	TIM_TypeDef *Instance = TIM1;
 	HardwareTimer *sampleTimer = new HardwareTimer(Instance);
 	sampleTimer->setOverflow(samplingRate, HERTZ_FORMAT);
 	sampleTimer->attachInterrupt(sampleISR);
 	sampleTimer->resume();
-
 	TaskHandle_t scanKeysHandle = NULL;
 	TaskHandle_t displayUpdateHandle = NULL;
 	xTaskCreate(
@@ -190,6 +226,7 @@ void setup() {
 		&displayUpdateHandle // Pointer to store the task handle
 	);
 	vTaskStartScheduler();
+#pragma endregion
 }
 
-void loop() {}
+void loop() {} // No code in loop, as everything is done in the tasks