void demo_init_pwma(void)
{
// Enable the pins driving the LEDs with the PWMA function (functionality E).
gpio_enable_module_pin(LED0_GPIO, LED0_PWM_FUNCTION);
gpio_enable_module_pin(LED1_GPIO, LED1_PWM_FUNCTION);
gpio_enable_module_pin(LED2_GPIO, LED2_PWM_FUNCTION);
gpio_enable_module_pin(LED3_GPIO, LED3_PWM_FUNCTION);
//#
//# Setup and enable the "PWMA and GCLK3 pin" generic clock to 120MHz
//#
// Start the RC120M clock
scif_start_rc120M();
// Setup the generic clock at 120MHz
scif_gc_setup( AVR32_PM_GCLK_PWMA, // The generic clock to setup
SCIF_GCCTRL_RC120M, // The input clock source to use for the generic clock
false, // Disable the generic clock divisor
0); // divfactor = DFLL0freq/gclkfreq
// Enable the generic clock
scif_gc_enable(AVR32_PM_GCLK_PWMA);
//#
//# Enable all the PWMAs to output to all LEDs. LEDs are default turned on by
//# setting PWM duty cycles to 0.
//#
pwma_config_enable(&AVR32_PWMA,PWMA_OUTPUT_FREQUENCY,PWMA_GCLK_FREQUENCY,0);
pwma_set_channels_value(&AVR32_PWMA,LED_PWMA_CHANNELS_MASK,PWMA_DUTY_CYCLE_INIT_VAL);
}
/**
* \brief Initialize ADC driver to read the board temperature sensor.
*
* Initializes the board's ADC driver module and configures the ADC channel
* connected to the onboard NTC temperature sensor ready for conversions.
*/
static void init_adc(void)
{
// Assign and enable GPIO pin to the ADC function.
gpio_enable_module_pin(ADC_TEMPERATURE_PIN, ADC_TEMPERATURE_FUNCTION);
const adcifb_opt_t adcifb_opt = {
.resolution = AVR32_ADCIFB_ACR_RES_12BIT,
.shtim = 15,
.ratio_clkadcifb_clkadc = 2,
.startup = 3,
.sleep_mode_enable = false
};
// Enable and configure the ADCIFB module
sysclk_enable_peripheral_clock(&AVR32_ADCIFB);
adcifb_configure(&AVR32_ADCIFB, &adcifb_opt);
// Configure the trigger (No trigger, only software trigger)
adcifb_configure_trigger(&AVR32_ADCIFB, AVR32_ADCIFB_TRGMOD_NT, 0);
// Enable the ADCIFB channel to NTC temperature sensor
adcifb_channels_enable(&AVR32_ADCIFB, ADC_TEMPERATURE_CHANNEL);
}
/**
* \brief Initializes the USART.
*
* Initializes the board USART ready for serial data to be transmitted and
* received.
*/
static void init_usart(void)
{
const usart_options_t usart_options = {
.baudrate = 57600,
.charlength = 8,
.paritytype = USART_NO_PARITY,
.stopbits = USART_1_STOPBIT,
.channelmode = USART_NORMAL_CHMODE
};
// Initialize USART in RS232 mode with the requested settings.
sysclk_enable_peripheral_clock(USART);
usart_init_rs232(USART, &usart_options, sysclk_get_pba_hz());
}
/**
* \brief Initializes the PWM subsystem ready to generate the RGB LED PWM
* waves.
*
* Initializes the on-chip PWM module and configures the RGB LED PWM outputs so
* the the brightness of the three individual channels can be adjusted.
*/
static void init_pwm(void)
{
// GPIO pin/function map for the RGB LEDs.
gpio_enable_module_pin(LED_RED_PWMA, LED_PWMA_FUNCTION);
gpio_enable_module_pin(LED_GREEN_PWMA, LED_PWMA_FUNCTION);
gpio_enable_module_pin(LED_BLUE_PWMA, LED_PWMA_FUNCTION);
const scif_gclk_opt_t genclk3_opt = {
.clock_source = SCIF_GCCTRL_CPUCLOCK,
.divider = 8,
.diven = true,
};
// Start generic clock 3 for the PWM outputs.
scif_start_gclk(AVR32_PM_GCLK_GCLK3, &genclk3_opt);
// Enable RGB LED PWM.
sysclk_enable_peripheral_clock(&AVR32_PWMA);
pwma_config_enable(&AVR32_PWMA,EXAMPLE_PWMA_FREQUENCY,EXAMPLE_PWMA_GCLK_FREQUENCY,0);
pwma_set_channels_value(&AVR32_PWMA,PWM_CHANNEL_RED | PWM_CHANNEL_BLUE| PWM_CHANNEL_GREEN,255);
}
/**
* \brief Application main loop.
*/
int main(void)
{
board_init();
sysclk_init();
sysclk_enable_peripheral_clock(USART);
// Initialize touch, ADC, USART and PWM
init_adc();
init_usart();
init_pwm();
init_touch();
while (true) {
uint32_t adc_data;
// Read slider and button and update RGB led
touch_handler();
// Wait until the ADC is ready to perform a conversion.
do { } while (!adcifb_is_ready(&AVR32_ADCIFB));
// Start an ADCIFB conversion sequence.
adcifb_start_conversion_sequence(&AVR32_ADCIFB);
// Wait until the converted data is available.
do { } while (!adcifb_is_drdy(&AVR32_ADCIFB));
// Get the last converted data.
adc_data = (adcifb_get_last_data(&AVR32_ADCIFB) & 0x3FF);
// Write temperature data to USART
do { } while (!usart_tx_empty(USART));
usart_write_char(USART, (adc_data >> 8));
do { } while (!usart_tx_empty(USART));
usart_write_char(USART, (adc_data & 0xFF));
}
}
/**
* \brief Main Application Routine
* -Initialize the system clocks \n
* -Configure and Enable the PWMA Generic clock \n
* -Configure and Enable the PWMA Module \n
* -Load Duty cycle value using Interlinked multi-value mode \n
* -Register and Enable the Interrupt \n
* -Enter into sleep mode \n
*/
int main (void)
{
uint32_t div;
bool config_status = FAIL;
bool set_value_status = FAIL;
/*
* Duty cycle value to be loaded. As Two channels are used
* in this example, two values has been assigned. Initialize the unused
* channel duty cycle value to 0, as it may take some garbage values
* and will return FAIL while updating duty cycle as the value might
* exceed the limit NOTE : Maximum four values can be loaded at a time,
* as the channel limitation for Interlinked multi-value mode is four.
*/
uint16_t duty_cycle[] = {11,5,0,0};
/* PWMA Pin and Function Map */
static const gpio_map_t PWMA_GPIO_MAP = {
{EXAMPLE_PWMA_PIN1, EXAMPLE_PWMA_FUNCTION1},
{EXAMPLE_PWMA_PIN2, EXAMPLE_PWMA_FUNCTION2},
};
/* Enable the PWMA Pins */
gpio_enable_module(PWMA_GPIO_MAP,
sizeof(PWMA_GPIO_MAP) / sizeof(PWMA_GPIO_MAP[0]));
/*
* Calculate the division factor value to be loaded and
* Enable the Generic clock
*/
div = div_ceil((sysclk_get_pba_hz()) , EXAMPLE_PWMA_GCLK_FREQUENCY);
genclk_enable_config(EXAMPLE_PWMA_GCLK_ID,EXAMPLE_PWMA_GCLK_SOURCE,div);
/*
* Initialize the System clock
* Note: Clock should be configured in conf_clock.h
*/
sysclk_init();
/* Initialize the delay routines */
delay_init(sysclk_get_cpu_hz());
/*
* Configure and Enable the PWMA Module. The LED will turned if
* configuration fails because of invalid argument.
*/
config_status = pwma_config_enable(pwma, EXAMPLE_PWMA_OUTPUT_FREQUENCY,
EXAMPLE_PWMA_GCLK_FREQUENCY, PWMA_SPREAD);
/* Error in configuring the PWMA module */
if (config_status == FAIL){
while (1) {
delay_ms(10);
gpio_tgl_gpio_pin(ERROR_LED);
}
}
/* Load the duty cycle values using Interlinked multi-value mode */
set_value_status = pwma_set_multiple_values(pwma,
((EXAMPLE_PWMA_CHANNEL_ID1<<0) | (EXAMPLE_PWMA_CHANNEL_ID2<<8)),
(uint16_t*)&duty_cycle);
/* Error in loading the duty cycle value */
if (set_value_status == FAIL){
while (1) {
delay_ms(10);
gpio_tgl_gpio_pin(ERROR_LED);
}
}
/* Disable global interrupts */
cpu_irq_disable();
/*
* Initialize the interrupt vectors
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_initialize_vectors();
/*
* Register the ACIFB interrupt handler
* Note: This function adds nothing for IAR as the interrupts are
* handled by the IAR compiler itself. It provides an abstraction
* between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_register_handler(&tofl_irq, AVR32_PWMA_IRQ, PWMA_INTERRUPT_PRIORITY);
/* Enable the Timebase overflow interrupt */
pwma->ier = AVR32_PWMA_IER_TOFL_MASK;
/* Enable global interrupt */
cpu_irq_enable();
/* Go to sleep mode */
while(1){
/* Enter into sleep mode */
pm_sleep(AVR32_PM_SMODE_FROZEN);
}
} /* End of main() */
