high-speed-adc-sampling-7.ino

HPMicro HPM5100: Microcontrolador RISC-V de 400 MHz con analógica integrada · Archivo : high-speed-adc-sampling-7.ino · Lenguaje : C · Uso : Acquérir des données analogiques à haute vitesse en utilisant deux canaux ADC en mode balayage automatique (Scan Mode).

Configura el ADC de 16 bits en modo escaneo automático para leer dos canales analógicos consecutivos sin intervención de la CPU.

high-speed-adc-sampling-7.ino

#include "board.h"
#include "hpm_adc16_drv.h"
#include "hpm_clock_drv.h"

#define ADC_SCAN_COUNT  2

uint16_t adc_result[ADC_SCAN_COUNT];

void adc_high_speed_init(void)
{
    adc16_config_t adc_config;
    adc16_channel_config_t ch_config[ADC_SCAN_COUNT];
    
    clock_add_to_group(clock_adc0, 0);
    
    /* Configuration ADC : Mode Scan, 16 bits */
    adc_config.res = adc16_res_16_bits;
    adc_config.conv_mode = adc16_conv_mode_auto_scan;
    adc_config.auto_conv_en = true;
    adc_config.sar_ctrl = adc16_sar_ctrl_normal;
    hpm_clock_drv_init(); /* Init simple pour l'exemple */
    adc16_init(ADC0, &adc_config);
    
    /* Configurer 2 canaux pour le scan */
    for (int i = 0; i < ADC_SCAN_COUNT; i++) {
        ch_config[i].input_ctrl = i; /* Sélectionne le canal d'entrée analogique i */
        ch_config[i].enable = true;
        adc16_channel_set_config(ADC0, i, &ch_config[i]);
    }
    
    /* Activer le compteur de fin de scan pour lecture */
    adc16_enable_interrupt(ADC0, adc16_int_all_conv_done, true);
    adc16_start_conversion(ADC0);
}

void adc_read_results(void)
{
    if (adc16_get_status_flags(ADC0) & adc16_flag_all_conv_done) {
        adc16_clear_status_flags(ADC0, adc16_flag_all_conv_done);
        for (int i = 0; i < ADC_SCAN_COUNT; i++) {
            adc_result[i] = adc16_read_result(ADC0, i);
        }
    }
}

int main(void)
{
    board_init();
    adc_high_speed_init();
    
    while (1) {
        adc_read_results();
        /* adc_result[0] = Canaux 0, adc_result[1] = Canaux 1 */
        delay_ms(5);
    }
}

← Volver a la ficha