void port_dir(port_t *obj, PinDirection dir)
{
uint32_t i;
// The mode is set per pin: reuse gpio logic
for (i=0; i<32; i++) {
if (obj->mask & (1<<i)) {
pin_dir(port_pin(obj->port, i), dir);
}
}
}
/*
Sets up the TCC module to send PWM output to the PWR LED
*/
void init_breathing_animation() {
// Setup the pin to be used as a TCC output
pin_mux(PIN_LED);
pin_dir(PIN_LED, true);
// Disable the TCC
tcc(PWR_LED_TCC_CHAN)->CTRLA.reg = 0;
// Reset the TCC
tcc(PWR_LED_TCC_CHAN)->CTRLA.reg = TCC_CTRLA_SWRST;
// Enable the timer
timer_clock_enable(PWR_LED_TCC_CHAN);
/* Set the prescalar setting to the highest division so we have more time
in between interrupts to complete the math
*/
tcc(PWR_LED_TCC_CHAN)->CTRLA.bit.PRESCALER = TCC_CTRLA_PRESCALER_DIV1024_Val;
// Set the waveform generator to generate a PWM signal
// It uses polarity setting of 1 (switches from DIR to ~DIR)
tcc(PWR_LED_TCC_CHAN)->WAVE.reg = TCC_WAVE_WAVEGEN_NPWM | TCC_WAVE_POL0;
// Set the top count value (when a match will be hit and the waveform output flipped)
tcc(PWR_LED_TCC_CHAN)->PER.reg = MAX_COUNTER;
// Set the counter number, starting at 0% duty cycle
tcc(PWR_LED_TCC_CHAN)->CC[PWR_LED_CC_CHAN].reg = counter;
// Set the second CCB value value be dark for simplicity
tcc(PWR_LED_TCC_CHAN)->CCB[PWR_LED_CC_CHAN].bit.CCB = counter;
// Enable IRQ's in the NVIC
NVIC_EnableIRQ(TCC1_IRQn);
// Set the priority to low
NVIC_SetPriority(TCC1_IRQn, 0xff);
// Enable interrupts so we can modify the counter value (creates breathing effect)
tcc(PWR_LED_TCC_CHAN)->INTENSET.reg = TC_INTENSET_OVF;
// Wait for all the changes to finish loading?
while (tcc(PWR_LED_TCC_CHAN)->SYNCBUSY.reg > 0);
// Enable the TCC
tcc(PWR_LED_TCC_CHAN)->CTRLA.reg = TCC_CTRLA_ENABLE;
}
void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
{
obj->port = port;
obj->mask = mask;
obj->reg_out = &MXC_GPIO->out_val[port];
obj->reg_in = &MXC_GPIO->in_val[port];
/* Ensure that the GPIO clock is enabled */
MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1;
uint32_t i;
// The function is set per pin: reuse gpio logic
for (i=0; i<32; i++) {
if (obj->mask & (1<<i)) {
gpio_set(port_pin(obj->port, i));
pin_dir(port_pin(obj->port, i), dir);
}
}
}
