32 lines
940 B
C
32 lines
940 B
C
/**
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* Copyright (c) 2021 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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#ifndef _PIO_I2C_H
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#define _PIO_I2C_H
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#include "i2c.pio.h"
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// ----------------------------------------------------------------------------
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// Low-level functions
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void pio_i2c_start(PIO pio, uint sm);
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void pio_i2c_stop(PIO pio, uint sm);
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void pio_i2c_repstart(PIO pio, uint sm);
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bool pio_i2c_check_error(PIO pio, uint sm);
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void pio_i2c_resume_after_error(PIO pio, uint sm);
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// If I2C is ok, block and push data. Otherwise fall straight through.
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void pio_i2c_put_or_err(PIO pio, uint sm, uint16_t data);
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uint8_t pio_i2c_get(PIO pio, uint sm);
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// ----------------------------------------------------------------------------
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// Transaction-level functions
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int pio_i2c_write_blocking(PIO pio, uint sm, uint8_t addr, uint8_t *txbuf, uint len);
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int pio_i2c_read_blocking(PIO pio, uint sm, uint8_t addr, uint8_t *rxbuf, uint len);
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#endif
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