diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/main.cpp | 53 |
1 files changed, 26 insertions, 27 deletions
diff --git a/src/main.cpp b/src/main.cpp index 37085e1..c36024c 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1,8 +1,8 @@ #include "mbed.h" -#include "spi_init.h" -#include "counter.h" #include "Adafruit_SSD1306.h" +#include "counter.h" +#include "spi_init.h" #define SW_PINS p24, p23, p22, p21 #define SW_PERIOD 20000 // 20ms @@ -14,23 +14,23 @@ void triangle(void); void sine(void); AnalogOut out_wave(p18); -PinName switch_pin[] = { SW_PINS }; +PinName switch_pin[] = {SW_PINS}; Counter *switch_position[4]; Ticker timer; Ticker pwm; -volatile uint16_t switch_count[4] = { 0, 0, 0, 0 }; -volatile uint16_t switch_pressed[4] = { 0, 0, 0, 0 }; -volatile uint16_t last_pressed[4] = { 0, 0, 0, 0 }; +volatile uint16_t switch_count[4] = {0, 0, 0, 0}; +volatile uint16_t switch_pressed[4] = {0, 0, 0, 0}; +volatile uint16_t last_pressed[4] = {0, 0, 0, 0}; -uint16_t current_f[4] = { 0, 0, 0, 0 }; +uint16_t current_f[4] = {0, 0, 0, 0}; volatile uint16_t update = 0; volatile uint16_t amp = 0; const double pi = 3.141592653589793238462; -const double offset = 65535/2; //Offset is 1/2 the total bits +const double offset = 65535 / 2; // Offset is 1/2 the total bits double rads = 0.0; uint16_t sample = 0; @@ -42,10 +42,10 @@ Adafruit_SSD1306_Spi oled(gSpi, D_DC_PIN, D_RST_PIN, D_CS_PIN, 64, 128); int main(void) { - for(int i=0; i<ARRAY_SIZE; i++) - { - int rads = (pi * i) / (ARRAY_SIZE/2.0f); - sineArray[i] = (uint16_t)(0.5f * (offset * (cos(rads + pi))) + offset); + for (int i = 0; i < ARRAY_SIZE; i++) { + int rads = (pi * i) / (ARRAY_SIZE / 2.0f); + sineArray[i] = + (uint16_t)(0.5f * (offset * (cos(rads + pi))) + offset); } uint16_t frequency = 0; @@ -60,7 +60,8 @@ int main(void) switch_position[i] = new Counter(switch_pin[i]); } - //Attach switch sampling timer ISR to the timer instance with the required period + // Attach switch sampling timer ISR to the timer instance with the + // required period timer.attach_us(&tout, SW_PERIOD); oled.clearDisplay(); @@ -72,7 +73,7 @@ int main(void) oled.setTextCursor(0, 0); - //Write the latest switch osciallor count + // Write the latest switch osciallor count for (int i = 3; i >= 0; --i) { current_f[i] += (switch_pressed[i] && !last_pressed[i]); if (current_f[i] > 9) @@ -81,25 +82,22 @@ int main(void) } old_frequency = frequency; - frequency = 1000*current_f[3] + 100*current_f[2] + 10*current_f[1] + current_f[0]; + frequency = 1000 * current_f[3] + 100 * current_f[2] + 10 * current_f[1] + current_f[0]; - if (frequency != old_frequency){ + if (frequency != old_frequency) { oled.printf("\nF:%u ", frequency); if (frequency) - pwm.attach_us(&sine, 1000000/(frequency*360)); - + pwm.attach_us( &sine, 1000000 / (frequency * 360)); } - //Copy the display buffer to the display + // Copy the display buffer to the display oled.display(); } - } } - -//Interrupt Service Routine for the switch sampling timer +// Interrupt Service Routine for the switch sampling timer void tout(void) { // Query how many times switch triggered @@ -123,17 +121,18 @@ void square(void){ out_wave = !out_wave; } */ -void triangle(void){ +void triangle(void) +{ amp++; - out_wave = (float) amp/256; + out_wave = (float)amp / 256; if (amp == 256) amp = 0; } -void sine(void){ - if(amp == ARRAY_SIZE) +void sine(void) +{ + if (amp == ARRAY_SIZE) amp = 0; out_wave.write_u16(sineArray[amp]); amp++; } - |