mirror of
https://github.com/greatscottgadgets/hackrf.git
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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright 2025 Great Scott Gadgets <info@greatscottgadgets.com>
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*
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* This file is part of HackRF.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "adc.h"
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#include <libopencm3/lpc43xx/adc.h>
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#include <libopencm3/lpc43xx/scu.h>
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uint16_t adc_read(uint8_t pin)
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{
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bool alt_pin = (pin & 0x80);
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pin &= ~0x80;
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uint8_t pin_mask = (1 << pin);
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if (alt_pin) {
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SCU_ENAIO0 |= pin_mask;
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} else {
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SCU_ENAIO0 &= ~pin_mask;
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}
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ADC0_CR = ADC_CR_SEL(pin_mask) | ADC_CR_CLKDIV(45) | ADC_CR_PDN | ADC_CR_START(1);
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while (!(ADC0_GDR & ADC_DR_DONE) || (((ADC0_GDR >> 24) & 0x7) != pin))
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;
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return (ADC0_GDR >> 6) & 0x03FF;
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}
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void adc_off(void)
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{
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ADC0_CR = 0;
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}
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