afec_example4.c File Reference

AFEC feature test example for SAM.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "asf.h"

Macros
#define	MAX_DIGITAL_12_BIT   (4095UL)
	The maximal digital value. More...
#define	MENU_HEADER
#define	STRING_EOL   "\r"
#define	STRING_HEADER
#define	VOLT_REF   (3300)
	Reference voltage for AFEC in mv. More...

Functions
static void	afec0_data_ready (void)
	AFEC0 DRDY interrupt callback function. More...
static void	afec0_diff_data_ready (void)
	AFEC0 DRDY interrupt callback function. More...
static void	afec1_data_ready (void)
	AFEC1 DRDY interrupt callback function. More...
static void	afec_eoc_0 (void)
	AFEC0 EOC0 interrupt callback function. More...
static void	afec_eoc_1 (void)
	AFEC0 EOC1 interrupt callback function. More...
static void	configure_console (void)
	Configure UART console. More...
static void	configure_tc_trigger (void)
	Configure to trigger AFEC by TIOA output of timer. More...
static void	display_menu (void)
	Display main menu. More...
int	main (void)
	Application entry point. More...
static void	print_float (float temp)
	Simple function to replace printf with float formatting. More...
static void	set_afec_test (void)
	Set AFEC test mode. More...

Variables
enum afec_channel_num	ch_list []
float	g_afec0_sample_data
	AFEC sample data. More...
float	g_afec1_sample_data
static uint32_t	g_delay_cnt
	The delay counter value. More...
static uint32_t	g_max_digital
	The maximal digital value. More...

#define MAX_DIGITAL_12_BIT   (4095UL)

The maximal digital value.

Referenced by main(), and set_afec_test().

#define MENU_HEADER

Value:

"\n\r-- press a key to set test feature--\n\r" \
        "-- 0: Gain Test --\n\r" \
        "-- 1: Dual AFEC Conversion Test --\n\r" \
        "-- 2: Differential Input Test --\n\r" \
        "-- 3: User Sequence Test --\n\r" \
        "-- 4: Typical Application Test -- \n\r" \

Referenced by display_menu().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- AFEC Feature Test Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

#define VOLT_REF   (3300)

Reference voltage for AFEC in mv.

Referenced by afec0_data_ready(), afec0_diff_data_ready(), afec1_data_ready(), afec_eoc_0(), and afec_eoc_1().

static void afec0_data_ready ( void  )

static

AFEC0 DRDY interrupt callback function.

References afec_get_latest_value(), g_afec0_sample_data, g_max_digital, print_float(), and VOLT_REF.

Referenced by set_afec_test().

static void afec0_diff_data_ready ( void  )

static

AFEC0 DRDY interrupt callback function.

References afec_get_latest_value(), g_afec0_sample_data, g_max_digital, print_float(), and VOLT_REF.

Referenced by set_afec_test().

static void afec1_data_ready ( void  )

static

AFEC1 DRDY interrupt callback function.

References afec_get_latest_value(), g_afec1_sample_data, g_max_digital, print_float(), and VOLT_REF.

Referenced by set_afec_test().

static void afec_eoc_0 ( void  )

static

AFEC0 EOC0 interrupt callback function.

References afec_channel_get_value(), g_afec0_sample_data, g_max_digital, print_float(), and VOLT_REF.

Referenced by set_afec_test().

static void afec_eoc_1 ( void  )

static

AFEC0 EOC1 interrupt callback function.

References afec_channel_get_value(), g_afec1_sample_data, g_max_digital, print_float(), and VOLT_REF.

Referenced by set_afec_test().

static void configure_console ( void  )

static

Configure UART console.

References uart_rs232_options::baudrate, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static void configure_tc_trigger ( void  )

static

Configure to trigger AFEC by TIOA output of timer.

References afec_set_trigger(), AFEC_TRIG_TIO_CH_0, pmc_enable_periph_clk(), sysclk_get_cpu_hz(), tc_find_mck_divisor(), tc_init(), and tc_start().

Referenced by set_afec_test().

static void display_menu ( void  )

static

Display main menu.

References MENU_HEADER.

Referenced by set_afec_test().

int main

(

void

)

Application entry point.

Returns

Unused (ANSI-C compatibility).

References afec_disable_interrupt(), afec_start_software_conversion(), board_init(), configure_console(), delay_ms, g_afec0_sample_data, g_afec1_sample_data, g_delay_cnt, g_max_digital, MAX_DIGITAL_12_BIT, set_afec_test(), STRING_HEADER, sysclk_init(), tc_stop(), and uart_read().

static void print_float ( float  temp )

static

Simple function to replace printf with float formatting.

Referenced by afec0_data_ready(), afec0_diff_data_ready(), afec1_data_ready(), afec_eoc_0(), and afec_eoc_1().

static void set_afec_test ( void  )

static

Set AFEC test mode.

References afec0_data_ready(), afec0_diff_data_ready(), afec1_data_ready(), AFEC_16_BITS, afec_ch_get_config_defaults(), afec_ch_set_config(), afec_channel_enable(), afec_channel_set_analog_offset(), afec_configure_sequence(), afec_enable(), afec_eoc_0(), afec_eoc_1(), AFEC_GAINVALUE_3, afec_get_config_defaults(), afec_get_interrupt_status(), afec_init(), afec_set_callback(), afec_set_trigger(), AFEC_TRIG_SW, ch_list, configure_tc_trigger(), afec_ch_config::diff, display_menu(), g_delay_cnt, g_max_digital, afec_ch_config::gain, MAX_DIGITAL_12_BIT, afec_config::resolution, and uart_read().

Referenced by main().

enum afec_channel_num ch_list[]

Initial value:

=
{
    AFEC_CHANNEL_1,
    AFEC_CHANNEL_0,
}

Referenced by set_afec_test().

float g_afec0_sample_data

AFEC sample data.

Referenced by afec0_data_ready(), afec0_diff_data_ready(), afec_eoc_0(), and main().

float g_afec1_sample_data

Referenced by afec1_data_ready(), afec_eoc_1(), and main().

uint32_t g_delay_cnt

static

The delay counter value.

Referenced by main(), and set_afec_test().

uint32_t g_max_digital

static

The maximal digital value.

Referenced by afec0_data_ready(), afec0_diff_data_ready(), afec1_data_ready(), afec_eoc_0(), afec_eoc_1(), main(), and set_afec_test().