/* \brief This is an example that shows how to do the following:
* - start a high frequency clock
* - switch the main clock to that high frequency clock
* - set-up a generic clock with a high frequency clock as a source
* - output a generic clock to GCLK_0_1(EVK1100) / GCLK_2_1 / GCLK_2(EVK1101) /
* GCLK_1_0(EVK1104) / GCLK_0_2(UC3C_EK) / GCLK_1_0(STK600_RCUC3L0 & AT32UC3L-EK)
*
*/
int main(void)
{
/* Start a high frequency clock and switch the main clock to that high frequency clock */
local_start_highfreq_clock();
/* Set-up a generic clock from a high frequency clock and output it to a gpio pin. */
local_start_gc();
/* Now toggle LED0 using a GPIO */
while(1)
{
gpio_tgl_gpio_pin(LED0_GPIO);
software_delay();
}
}
/*! \brief Main function. Execution starts here.
*
* \return 0 on success
*/
int main(void)
{
pwm_opt_t pwm_opt; // PWM option config.
avr32_pwm_channel_t pwm_channel = {{0}, // cmr
{0}, // cdty
{0}, // cdtyupd
{0}, // cprd
{0}, // cprdupd
{0}, // ccnt
{0}, // dt
{0}};// dtupd ; One channel config.
unsigned int channel_id;
// Start Main Clock On external 16MHz Oscillator
// Start PLL for PWM
local_start_highfreq_clock();
// Start Enable Generic Clock with PLL as source clock
pwm_start_gc();
channel_id = EXAMPLE_PWM_CHANNEL_ID;
gpio_enable_module_pin(EXAMPLE_PWM_L_PIN, EXAMPLE_PWM_L_FUNCTION);
gpio_enable_module_pin(EXAMPLE_PWM_H_PIN, EXAMPLE_PWM_H_FUNCTION);
// PWM controller configuration.
pwm_opt.diva = AVR32_PWM_DIVA_CLK_OFF;
pwm_opt.divb = AVR32_PWM_DIVB_CLK_OFF;
pwm_opt.prea = AVR32_PWM_PREA_CCK;
pwm_opt.preb = AVR32_PWM_PREB_CCK;
pwm_opt.fault_detection_activated = false;
pwm_opt.sync_channel_activated = true;
pwm_opt.sync_update_channel_mode = PWM_SYNC_UPDATE_MANUAL_WRITE_MANUAL_UPDATE;
pwm_opt.sync_channel_select[0] = true;
pwm_opt.sync_channel_select[1] = true;
pwm_opt.sync_channel_select[2] = false;
pwm_opt.sync_channel_select[3] = false;
pwm_opt.cksel = PWM_CKSEL_GCLK;
pwm_init(&pwm_opt);
// Update the period
pwm_update_period_value(10);
// Channel configuration
pwm_channel.CMR.dte = 1; // Enable Deadtime for complementary Mode
pwm_channel.CMR.dthi = 1; // Deadtime Inverted on PWMH
pwm_channel.CMR.dtli = 0; // Deadtime Not Inverted on PWML
pwm_channel.CMR.ces = 0; // 0/1 Channel Event at the End of PWM Period
pwm_channel.CMR.calg = PWM_MODE_LEFT_ALIGNED; // Channel mode.
pwm_channel.CMR.cpol = PWM_POLARITY_LOW; // Channel polarity.
pwm_channel.CMR.cpre = AVR32_PWM_CPRE_CCK; // Channel prescaler.
pwm_channel.cdty = 10; // Channel duty cycle, should be < CPRD.
pwm_channel.cprd = 20; // Channel period.
// With these settings, the output waveform period will be :
// (56MHz)/20 == 2.8MHz == (MCK/prescaler)/period, with MCK == 56MHz,
// prescaler == 1, period == 20.
pwm_channel_init(channel_id, &pwm_channel); // Set channel configuration to channel 0
pwm_start_channels((1 << channel_id)); // Start channel 0 & 1.
while(1);
}
