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22 lines
583 B
C
22 lines
583 B
C
/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "pico.h"
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#include "hardware/adc.h"
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#include "hardware/resets.h"
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void adc_init(void) {
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// ADC is in an unknown state. We should start by resetting it
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reset_unreset_block_num_wait_blocking(RESET_ADC);
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// Now turn it back on. Staging of clock etc is handled internally
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adc_hw->cs = ADC_CS_EN_BITS;
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// Internal staging completes in a few cycles, but poll to be sure
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while (!(adc_hw->cs & ADC_CS_READY_BITS)) {
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tight_loop_contents();
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}
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}
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