adcife_example.c File Reference

Analog-to-Digital Converter Interface Example for SAM4L.

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

#include "asf.h"

Macros
#define	MAX_DIGITAL   4095
	The maximal digital value. More...
#define	MENU_HEADER
#define	STRING_EOL   "\r"
#define	STRING_HEADER
#define	VOLT_REF   1000

Enumerations
enum	{   TRIGGER_MODE_SOFTWARE = 0,   TRIGGER_MODE_ITIMER,   TRIGGER_MODE_CON }
	ADCIFE trigger modes. More...

Functions
static void	adcife_read_conv_result (void)
	Callback function for ADCIFE interrupt. More...
static void	configure_console (void)
	Configure UART console. More...
static void	display_menu (void)
	Display ADCIFE configuration menu. More...
int	main (void)
	Application entry point for adcife example. More...
static void	pdca_transfer_done (enum pdca_channel_status status)
	Callback function for PDCA interrupt. More...
static void	set_adc_test_mode (void)
	Set ADCIFE test mode. More...
static void	start_adc (void)
	Start ADC sample. More...
static void	start_dac (void)
	Start DAC ouput. More...

Variables
enum { ... }	e_trigger_mode
	ADCIFE trigger modes. More...
struct adc_cdma_first_config	g_adc_cdma_first_cfg [2]
	ADC CDMA config value. More...
struct adc_dev_inst	g_adc_inst
	ADC instance. More...
struct adc_pdca_config	g_adc_pdca_cfg
uint16_t	g_adc_sample_data [2]
	Conversion value. More...
struct {
uint8_t   uc_gain_en
uint8_t   uc_pdc_en
uint8_t   uc_trigger_mode
}	g_adc_test_mode
	ADCIFE test mode structure. More...
volatile uint8_t	g_uc_condone_flag = 0
	Conversion done flag. More...

#define MAX_DIGITAL   4095

The maximal digital value.

Referenced by main().

#define MENU_HEADER

Value:

"\n\r" \
        "===================================================\n\r" \
        "Menu: press a key to change the configuration.\n\r" \
        "---------------------------------------------------------\n\r"

Referenced by display_menu().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

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

Referenced by main().

#define VOLT_REF   1000

Referenced by main().

anonymous enum

ADCIFE trigger modes.

Enumerator
TRIGGER_MODE_SOFTWARE
TRIGGER_MODE_ITIMER
TRIGGER_MODE_CON

static void adcife_read_conv_result ( void  )

static

Callback function for ADCIFE interrupt.

References adc_clear_status(), adc_get_last_conv_value(), adc_get_status(), g_adc_inst, g_adc_sample_data, and g_uc_condone_flag.

Referenced by start_adc().

static void configure_console ( void  )

static

Configure UART console.

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

Referenced by main().

static void display_menu ( void  )

static

Display ADCIFE configuration menu.

References g_adc_test_mode, MENU_HEADER, TRIGGER_MODE_CON, TRIGGER_MODE_ITIMER, and TRIGGER_MODE_SOFTWARE.

Referenced by main(), and set_adc_test_mode().

int main

(

void

)

Application entry point for adcife example.

Returns

Unused (ANSI-C compatibility).

References adc_disable_interrupt(), ADC_SEQ_SEOC, adc_start_software_conversion(), board_init(), CONF_UART, configure_console(), delay_ms, display_menu(), g_adc_inst, g_adc_sample_data, g_adc_test_mode, g_uc_condone_flag, MAX_DIGITAL, set_adc_test_mode(), start_adc(), start_dac(), STRING_HEADER, sysclk_init(), TRIGGER_MODE_SOFTWARE, usart_read(), and VOLT_REF.

static void pdca_transfer_done ( enum pdca_channel_status  status )

static

Callback function for PDCA interrupt.

References CONFIG_ADC_PDCA_RX_CHANNEL, CONFIG_ADC_PDCA_TX_CHANNEL, g_adc_sample_data, g_uc_condone_flag, PDCA_CH_TRANSFER_COMPLETED, and pdca_channel_write_load().

Referenced by start_adc().

static void set_adc_test_mode ( void  )

static

Set ADCIFE test mode.

References display_menu(), g_adc_test_mode, TRIGGER_MODE_CON, TRIGGER_MODE_ITIMER, and TRIGGER_MODE_SOFTWARE.

Referenced by main().

static void start_adc ( void  )

static

Start ADC sample.

Initialize ADC, set clock and timing, and set ADC to given mode.

References ADC_BIPOLAR_SINGLEENDED, adc_ch_set_config(), ADC_CLKSEL_APBCLK, adc_configure_gain(), adc_configure_itimer_period(), adc_configure_trigger(), adc_disable_interrupt(), adc_enable(), ADC_GAIN_1X, ADC_GAIN_2X, ADC_GCOMP_DIS, ADC_HWLA_DIS, adc_init(), ADC_INTERNAL_3, ADC_MUXNEG_1, ADC_MUXPOS_3, adc_pdca_set_config(), ADC_PRESCAL_DIV16, ADC_REFSEL_0, ADC_RES_12_BIT, ADC_SEQ_SEOC, adc_set_callback(), ADC_SPEED_150K, adc_start_itimer(), ADC_TRIG_CON, ADC_TRIG_INTL_TIMER, ADC_TRIG_SW, ADC_ZOOMRANGE_0, adcife_read_conv_result(), CONFIG_ADC_PDCA_RX_CHANNEL, CONFIG_ADC_PDCA_TX_CHANNEL, CONFIG_ADC_STARTUP, g_adc_inst, g_adc_test_mode, adc_ch_config::internal_timer_max_count, pdca_channel_disable_interrupt(), pdca_channel_set_callback(), pdca_transfer_done(), adc_config::prescal, adc_ch_config::seq_cfg, STATUS_OK, TRIGGER_MODE_CON, TRIGGER_MODE_ITIMER, TRIGGER_MODE_SOFTWARE, and adc_seq_config::zoomrange.

Referenced by main().

static void start_dac ( void  )

static

Start DAC ouput.

Initialize DAC, set clock and timing, and set DAC to given mode.

References dacc_enable(), dacc_reset(), dacc_set_timing(), dacc_set_transfer_mode(), dacc_write_conversion_data(), and sysclk_enable_peripheral_clock().

Referenced by main().

enum { ... } e_trigger_mode

ADCIFE trigger modes.

struct adc_cdma_first_config g_adc_cdma_first_cfg[2]

ADC CDMA config value.

struct adc_dev_inst g_adc_inst

ADC instance.

Referenced by adcife_read_conv_result(), main(), and start_adc().

struct adc_pdca_config g_adc_pdca_cfg

Initial value:

= {
    
    .wm = false,
    
    .nb_channels = 2,
    
    .buffer = g_adc_sample_data,
    
    .pdc_rx_channel = CONFIG_ADC_PDCA_RX_CHANNEL,
    
    .pdc_tx_channel = CONFIG_ADC_PDCA_TX_CHANNEL,
    
    .cdma_cfg = (void *)&g_adc_cdma_first_cfg[0]
}

uint16_t g_adc_sample_data[2]

Conversion value.

Referenced by adcife_read_conv_result(), main(), and pdca_transfer_done().

struct { ... } g_adc_test_mode

ADCIFE test mode structure.

Referenced by display_menu(), main(), set_adc_test_mode(), and start_adc().

volatile uint8_t g_uc_condone_flag = 0

Conversion done flag.

Referenced by adcife_read_conv_result(), main(), and pdca_transfer_done().

uint8_t uc_gain_en

uint8_t uc_pdc_en

uint8_t uc_trigger_mode