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31 lines
888 B
31 lines
888 B
#pragma once
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#include "common.h"
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/** Wait for incoming data on USART (true on success) */
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bool usart_wait_rx(uint32_t usart);
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/** Check if USART has received a byte */
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bool usart_rx_ready(uint32_t usart);
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/** Receive a char from USART. Does not check if ready. */
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char usart_rx_char(uint32_t usart);
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/**
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* Receive up to `len` chars from USART;
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*
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* Adds \0 after last char.
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* Total length (without the \0) is returned.
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*/
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uint32_t usart_rx_string(uint32_t usart, char *buffer, uint32_t len);
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/** Wait for outgoing data on USART (true on success) */
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bool usart_wait_tx(uint32_t usart);
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/** Check if USART has finished sending a byte */
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bool usart_tx_ready(uint32_t usart);
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/** Transmit a character. First waits for TX buffer to empty. */
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void usart_tx_char(uint32_t usart, uint8_t c);
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/** Transmit a string until \0 */
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void usart_tx_string(uint32_t usart, const char *string);
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