supleed2/ELEC60013-ES-CW2
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Finished P1S3, strating P1S4

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This commit is contained in:
Kacper 2022-03-23 14:24:31 +00:00
parent 848cb41aca
commit 1223947839
1 changed files with 57 additions and 29 deletions
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80
src/main.cpp
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@ -3,8 +3,24 @@
#include <Arduino.h>
#include <U8g2lib.h>
volatile int32_t currentStepSize;
volatile uint8_t keyArray[7];
volatile uint8_t *keyArrayPtr = keyArray;
#pragma region 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
const int32_t stepSizes[] = {0,
6370029, 6748811, 7150116, 7575284, 8025734, 8502969, 9008582,
9544260, 10111791, 10713070, 11350102, 12025014, 12740059, 13497622,
14300233, 15150569, 16051469, 17005939, 18017164, 19088521, 20223583,
21426140, 22700205, 24050029, 25480118, 26995245, 28600466, 30301138,
32102938, 34011878, 36034329, 38177042, 40447167, 42852281, 45400410,
48100059, 50960237, 53990491, 57200933, 60602277, 64205876, 68023756,
72068659, 76354085, 80894335, 85704562, 90800821, 96200119, 101920475,
107980982, 114401866, 121204555, 12841175, 136047513, 144137319, 152708170,
161788670, 171409125, 181601642, 192400238}; // Step sizes for each note
#pragma endregion
#pragma region Pin Definitions
@ -46,25 +62,6 @@ void setOutMuxBit(const uint8_t bitIdx, const bool value) {
digitalWrite(REN_PIN, LOW);
}
// Function to read keys from key matrix
uint32_t readKeys() {
uint32_t keys = 0;
for (uint8_t i = 0; i < 3; i++) {
digitalWrite(REN_PIN, LOW);
digitalWrite(RA0_PIN, i & 0x01);
digitalWrite(RA1_PIN, i & 0x02);
digitalWrite(RA2_PIN, i & 0x04);
digitalWrite(REN_PIN, HIGH);
delayMicroseconds(5);
keys |= !digitalRead(C0_PIN) << (i * 4);
keys |= !digitalRead(C1_PIN) << (i * 4 + 1);
keys |= !digitalRead(C2_PIN) << (i * 4 + 2);
keys |= !digitalRead(C3_PIN) << (i * 4 + 3);
}
digitalWrite(REN_PIN, LOW);
return keys;
}
// Read key values in currently set row
uint8_t readCols() {
uint8_t row = 0;
@ -84,6 +81,35 @@ void setRow(const uint8_t rowIdx) {
digitalWrite(REN_PIN, HIGH);
}
uint16_t getTopKey(volatile uint8_t array[]) {
uint16_t topKey = 0;
for (uint8_t i = 0; i < 3; i++) {
for (uint8_t j = 0; j < 4; j++) {
if (array[i] & (0x1 << j)) {
topKey = (octave - 2) * 12 + i * 4 + j + 1;
}
}
}
Serial.println(topKey);
return topKey;
}
void sampleISR(){
static int32_t phaseAcc = 0;
phaseAcc += currentStepSize;
int32_t Vout = phaseAcc >> 24;
analogWrite(OUTR_PIN, Vout + 128);
}
void scanKeysTask(void * pvParameters){
for (uint8_t i = 0; i < 3; i++) {
setRow(i);
delayMicroseconds(3);
keyArray[i] = readCols();
}
__atomic_store_n(&currentStepSize, stepSizes[getTopKey(keyArray)], __ATOMIC_RELAXED);
}
void setup() {
#pragma region Pin Setup
pinMode(RA0_PIN, OUTPUT);
@ -112,16 +138,16 @@ void setup() {
// Initialise UART
Serial.begin(115200);
Serial.println("Hello World");
TIM_TypeDef *Instance = TIM1;
HardwareTimer *sampleTimer = new HardwareTimer(Instance);
sampleTimer->setOverflow(samplingRate, HERTZ_FORMAT);
sampleTimer->attachInterrupt(sampleISR);
sampleTimer->resume();
}
void loop() {
static uint32_t next = millis();
static uint8_t keyArray[7];
for (uint8_t i = 0; i < 3; i++) {
setRow(i);
delayMicroseconds(3);
keyArray[i] = readCols();
}
for (uint8_t i = 3; i < 7; i++) {
setRow(i);
delayMicroseconds(3);
@ -132,7 +158,9 @@ void loop() {
next += interval;
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_profont12_mf); // choose a suitable font
u8g2.drawStr(2, 10, "Hello World!"); // write something to the internal memory
u8g2.setCursor(2, 10); // set the cursor position
scanKeysTask(NULL);
u8g2.print(currentStepSize); // Print the current frequency
digitalToggle(LED_BUILTIN);
u8g2.setCursor(2, 20);
for (uint8_t i = 0; i < 7; i++) {