使用MCP4728和PIC18F45K50在各种应用中解码、表达和放大数据

/*!
 * \file 
 * \brief Dac4 Click example
 * 
 * # Description
 * This application enables usage of digital to analog converter.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initializes I2C driver, executes general call reset and wake up commands.
 * 
 * ## Application Task  
 * Changes the output voltage of channels every 3 seconds, and displays
 * the channels status on the USB UART.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "dac4.h"

// ------------------------------------------------------------------ VARIABLES

static dac4_t dac4;
static log_t logger;

// ------------------------------------------------------- ADDITIONAL FUNCTIONS

void dac4_log_report ( uint8_t channel_no )
{
    dac4_channel_setting_t dac4_channel_buffer[ 8 ];

    dac4_data_report ( &dac4, dac4_channel_buffer );
    channel_no *= 2;
    
    log_printf( &logger, "--- Power ON bit: " );
    switch ( dac4_channel_buffer[ channel_no ].por_bit )
    {
        case 0:
        {
            log_printf( &logger,"Power OFF\r\n" );
            break;
        }
        case 1:
        {
            log_printf( &logger, "Power ON\r\n" );
            break;
        }
        default :
        {
            break;
        }
    }

    log_printf( &logger, "--- V reference    : " );
    switch ( dac4_channel_buffer[ channel_no ].voltage_reference )
    {
        case DAC4_VREF_EXTERNAL:
        {
            log_printf( &logger, "External\r\n" );
            break;
        }
        case DAC4_VREF_INTERNAL:
        {
            log_printf( &logger, "Internal\r\n" );
            break;
        }
        default :
        {
            break;
        }
    }

    log_printf( &logger, "--- Power mode     : " );
    switch ( dac4_channel_buffer[ channel_no ].power_mode )
    {
        case DAC4_MODE_NORMAL:
        {
            log_printf( &logger, "Normal\r\n" );
            break;
        }
        case DAC4_MODE_1kOhm:
        {
            log_printf( &logger, "1 kOhm\r\n" );
            break;
        }
        case DAC4_MODE_100kOhm:
        {
            log_printf( &logger, "100 kOhm\r\n" );
            break;
        }
        case DAC4_MODE_500kOhm:
        {
            log_printf( &logger, "500 kOhm\r\n" );
            break;
        }
        default :
        {
            break;
        }
    }

    log_printf( &logger, "--- Gain value     : " );
    switch ( dac4_channel_buffer[ channel_no ].gain_value )
    {
        case DAC4_MODE_NORMAL:
        {
            log_printf( &logger, "1x Gain\r\n" );
            break;
        }
        case DAC4_MODE_1kOhm:
        {
            log_printf( &logger, "2x Gain\r\n" );
            break;
        }
        default :
        {
            break;
        }
    }
    
    log_printf( &logger, "--- DAC input data : %d  [0-4095]\r\n", dac4_channel_buffer[ channel_no ].dac_input_data );
    log_printf( &logger, "-------------------------------------\r\n" );
}

void dac4_set_output ( uint8_t channel_set )
{
    dac4_channel_setting_t dac4_channel_x;
    static uint16_t aux_dac_input_data = 0;
    
    dac4_channel_x.channel_select = channel_set;
    dac4_channel_x.udac_bit = DAC4_UPDATE;
    dac4_channel_x.voltage_reference = DAC4_VREF_EXTERNAL;
    dac4_channel_x.power_mode = DAC4_MODE_NORMAL;
    dac4_channel_x.gain_value = DAC4_GAIN_x1;
    dac4_channel_x.dac_input_data = aux_dac_input_data;

    if ( 0 != dac4_single_write( &dac4, &dac4_channel_x ) )
    {
        log_printf( &logger, "--- Fatal ERROR !!! \r\n" );
    }
    else
    {
        log_printf( &logger, "------------------------------------- \r\n" );
        log_printf( &logger, "--- Output setup done \r\n" );
        log_printf( &logger, "------------------------------------- \r\n" );
        aux_dac_input_data += 500;
        if ( aux_dac_input_data > 4095 )
        {
            aux_dac_input_data = 0;
        }
    }
}

void dac4_channel_report ( )
{
    log_printf( &logger, "\r\n -----> Channel A \r\n" );
    dac4_set_output( DAC4_CHANNEL_A );
    dac4_log_report( 0 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "\r\n -----> Channel B \r\n" );
    dac4_set_output( DAC4_CHANNEL_B );
    dac4_log_report( 1 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "\r\n -----> Channel C \r\n" );
    dac4_set_output( DAC4_CHANNEL_C );
    dac4_log_report( 2 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "\r\n -----> Channel D \r\n" );
    dac4_set_output( DAC4_CHANNEL_D );
    dac4_log_report( 3 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    dac4_cfg_t cfg;

    /** 
     * 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.

    dac4_cfg_setup( &cfg );
    DAC4_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    dac4_init( &dac4, &cfg );
    log_info( &logger, "---- Application ----" );

    Delay_ms ( 500 );
    dac4_general_call_reset( &dac4 );
    Delay_ms ( 500 );
    dac4_general_call_wake_up( &dac4 );
    Delay_ms ( 500 );

    log_printf( &logger, "--- App init done \r\n \r\n" );
}

void application_task ( void )
{
    dac4_channel_report( );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END