pwm_sync_example.c File Reference

PWM SYNC example for SAM.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"
#include "conf_board.h"

Macros
#define	DUTY_BUFFER_LENGTH   ((PERIOD_VALUE - INIT_DUTY_VALUE + 1) * 3)
	Duty cycle buffer length for three channels. More...
#define	INIT_DEAD_TIME   5
	Initial dead time value. More...
#define	INIT_DUTY_VALUE   0
	Initial duty cycle value. More...
#define	MAX_SYNC_UPDATE_PERIOD   PWM_SCUP_UPR_Msk
	Maximum synchronous update period. More...
#define	PERIOD_VALUE   50
	PWM period value. More...
#define	PWM_FREQUENCY   50
	PWM frequency in Hz. More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	configure_console (void)
	Configure the Console UART. More...
static void	display_menu (void)
	Display menu. More...
static uint8_t	get_num_value (void)
	Get numeric value from console. More...
int	main (void)
	Application entry point for PWM PDC example. More...
void	PWM_Handler (void)
	Interrupt handler for the PWM controller. More...

Variables
pdc_packet_t	g_pdc_tx_packet
	PDC transfer packet. More...
uint16_t	g_us_duty_buffer [DUTY_BUFFER_LENGTH]
	Duty cycle buffer for PDC transfer. More...

#define DUTY_BUFFER_LENGTH   ((PERIOD_VALUE - INIT_DUTY_VALUE + 1) * 3)

Duty cycle buffer length for three channels.

Referenced by main(), and PWM_Handler().

#define INIT_DEAD_TIME   5

Initial dead time value.

Referenced by main().

#define INIT_DUTY_VALUE   0

Initial duty cycle value.

Referenced by main().

#define MAX_SYNC_UPDATE_PERIOD   PWM_SCUP_UPR_Msk

Maximum synchronous update period.

Referenced by main().

#define PERIOD_VALUE   50

PWM period value.

Referenced by main().

#define PWM_FREQUENCY   50

PWM frequency in Hz.

Referenced by main().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- PWM SYNC Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

static void configure_console ( void  )

static

Configure the Console UART.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_PARITY, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static void display_menu ( void  )

static

Display menu.

Referenced by main().

static uint8_t get_num_value ( void  )

static

Get numeric value from console.

Returns

Integer value from the console.

References uart_read().

Referenced by main().

int main

(

void

)

Application entry point for PWM PDC example.

Returns

Unused (ANSI-C compatibility).

References board_init(), pwm_channel_t::channel, configure_console(), display_menu(), DUTY_BUFFER_LENGTH, g_us_duty_buffer, get_num_value(), INIT_DEAD_TIME, INIT_DUTY_VALUE, MAX_SYNC_UPDATE_PERIOD, pdc_enable_transfer(), pdc_tx_init(), PERIOD_VALUE, pmc_enable_periph_clk(), pwm_channel_disable(), pwm_channel_enable(), pwm_channel_init(), PWM_FREQUENCY, PWM_HIGH, pwm_init(), PWM_LOW, STRING_HEADER, sysclk_get_cpu_hz(), sysclk_init(), uart_read(), pdc_packet::ul_addr, pwm_clock_t::ul_clka, pwm_channel_t::ul_prescaler, and pdc_packet::ul_size.

void PWM_Handler

(

void

)

Interrupt handler for the PWM controller.

References DUTY_BUFFER_LENGTH, g_us_duty_buffer, pdc_enable_transfer(), pdc_tx_init(), pdc_packet::ul_addr, and pdc_packet::ul_size.

pdc_packet_t g_pdc_tx_packet

PDC transfer packet.

uint16_t g_us_duty_buffer[DUTY_BUFFER_LENGTH]

Duty cycle buffer for PDC transfer.

Referenced by main(), and PWM_Handler().