void main(void) {
USBCDC_ResetBehaviour(&cdcBehaviour);
USB_Init(&usbDefinition, &usbDevice);
USB_SoftConnect(&usbDevice);
GPIO_SetDir(LED_PORT, LED_PIN, GPIO_Output);
GPIO_WriteOutput(LED_PORT, LED_PIN, false);
counter = 0;
while (1) {
uint8_t ch;
if (USBCDC_ReadBytes(&usbDevice, &cdcBehaviour, &ch, 1)) {
counter++;
GPIO_WriteOutput(LED_PORT, LED_PIN, counter & 1);
if ((ch >= 'a') && (ch <= 'z')) ch -= 'a'-'A';
else if ((ch >= 'A') && (ch <= 'Z')) ch += 'a'-'A';
if ((ch == 'a') || (ch == 'A')) ch = '4';
if ((ch == 'i') || (ch == 'I')) ch = '1';
if ((ch == 'o') || (ch == 'O')) ch = '0';
if ((ch == 'e') || (ch == 'E')) ch = '3';
if ((ch == 'l') || (ch == 'L')) ch = '7';
if (ch == 's') ch = 'z';
if (ch == 'S') ch = 'Z';
USBCDC_WriteBytes(&usbDevice, &cdcBehaviour, &ch, 1);
}
}
}
void blinker() {
if (blinks > 0) {
bool led = GPIO_ReadInput(LED_PORT, LED_PIN);
GPIO_WriteOutput(LED_PORT, LED_PIN, !led);
blinks -= led;
}
}
void main(void) {
uint8_t counter = 0;
GPIO_SetDir(LED_PORT, LED_PIN, GPIO_Output);
GPIO_SetDir(KEY_PORT, KEY_PIN, GPIO_Input);
GPIO_WriteOutput(LED_PORT, LED_PIN, false);
SYSCON_StartSystick(72*200000); // 0.2s
blinks = 0;
while (true) {
if (!debounced(KEY_PORT, KEY_PIN) && blinks == 0)
blinks = counter = (counter+1)&7;
}
}
void systick(void) { //systick is used for regular, repeating tasks
counter++;
// calculate a smooth triangle ramp from counter
uint32_t brightness = counter / ANIM_SPEED;
if (brightness >= 2*ANIM_STEPS) counter = 0; //reset counter
else if (brightness >= ANIM_STEPS) brightness = 2*ANIM_STEPS-brightness;
// scale brightness to match pwm
brightness = (brightness * PWM_SPEED) / ANIM_STEPS;
// this is the pwm high frequency counter
uint32_t pwmPhase = counter % PWM_SPEED;
// set output
GPIO_WriteOutput(LED_PORT, LED_PIN, brightness > pwmPhase);
}