uart_tx_chars() function

Send data to the UART port from a given buffer and length. This function will not wait for enough space in TX FIFO. It will just fill the available TX FIFO and return when the FIFO is full.

Syntax

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Summary

Declaration

Definition

from uart.h:507

int uart_tx_chars(uart_port_t uart_num, const char* buffer, uint32_t len);

Implemented in uart.c:1405

Arguments

Argument

Description

uart_num

UART port number, the max port number is (UART_NUM_MAX -1).

buffer

data buffer address

len

data length to send

Return value

- (-1) Parameter error - OTHERS (>=0) The number of bytes pushed to the TX FIFO

Notes

This function should only be used when UART TX buffer is not enabled.

Examples

References

from examples

uart_tx_chars() function

Syntax

Arguments

Return value

Notes

Examples

References

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