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