使用 TLA2518 和 TM4C129XKCZAD 确保模拟信号到数字格式的可靠转换

/*!
 * @file main.c
 * @brief ADC 20 Click example
 *
 * # Description
 * This example demonstrates the use of ADC 20 click board by displaying the state of 8 channels
 * configured as analog inputs (CH2-CH5), digital inputs (CH0-CH1) and digital outputs (CH6-CH7).
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and performs the click default configuration.
 *
 * ## Application Task
 * Starts the auto sequence mode, reads the 12bit ADC value from analog input channels (CH2-CH5) and
 * displays the values converted to voltage on the USB UART. After that, stops auto sequence mode and
 * toggles the state of digital output pins (CH6-CH7), then reads and displays the state of all GPIO pins.
 * 
 * @author Stefan Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "adc20.h"

static adc20_t adc20;
static log_t logger;

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    adc20_cfg_t adc20_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    adc20_cfg_setup( &adc20_cfg );
    ADC20_MAP_MIKROBUS( adc20_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == adc20_init( &adc20, &adc20_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( ADC20_ERROR == adc20_default_cfg ( &adc20 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

void application_task ( void )
{
    adc20_start_auto_sequence ( &adc20 );
    for ( uint8_t ch_id = ADC20_CHANNEL_ID_2; ch_id <= ADC20_CHANNEL_ID_5; ch_id++ )
    {
        uint16_t adc_data = 0;
        if ( ADC20_OK == adc20_read_data ( &adc20, &adc_data ) )
        {
            float voltage = ( float ) ( adc_data >> ADC20_ADC_OFFSET ) / ADC20_RES_12BIT * ADC20_VREF_3V3;
            log_printf ( &logger, " AIN%u: %.2f V\r\n", ( adc_data & ADC20_CHANNEL_ID_MASK ), voltage );
        }
    }
    adc20_stop_auto_sequence ( &adc20 );
    static uint8_t out_logic_state = ADC20_GPIO_VALUE_LOW;
    if ( ADC20_OK == adc20_set_gpo_value ( &adc20, ( ADC20_CHANNEL_6 | ADC20_CHANNEL_7 ), out_logic_state ) )
    {
        uint8_t gpio_value = 0;
        if ( ADC20_OK == adc20_read_gpio_value ( &adc20, &gpio_value ) )
        {
            log_printf ( &logger, " GPIO state: 0x%.2X\r\n", gpio_value );
        }
    }
    out_logic_state = !out_logic_state;
    log_printf ( &logger, "\r\n" );
    Delay_ms ( 1000 );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}

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