low level interface to the serial port More...
#include <avr/io.h>#include "uart.h"
Include dependency graph for uart.c:
Functions | |
| void | uart_tx (const uint8_t port, const uint8_t enable) |
| enable/disable the trasmit part of a serial port. More... | |
| void | uart_rx (const uint8_t port, const uint8_t enable) |
| enable/disable the receive part of a serial port. More... | |
| void | uart_init (const uint8_t port) |
| initialize the serial port and speed. More... | |
| void | uart_shutdown (const uint8_t port) |
| char | uart_getchar (const uint8_t port, const uint8_t locked) |
| get a char from the serial port. More... | |
| void | uart_putchar (const uint8_t port, const char c) |
| send a single char down to the serial port. More... | |
| void | uart_printstr (const uint8_t port, const char *s) |
| void | uart_flush (const uint8_t port) |
| flush the port | |
Detailed Description
low level interface to the serial port
Function Documentation
◆ uart_getchar()
| char uart_getchar | ( | const uint8_t | port, |
| const uint8_t | locked | ||
| ) |
get a char from the serial port.
- Parameters
-
port the port. locked 1 - wait forever until a char is received. 0 - get a char if it is present or exit with 0.
- Returns
- the char or 0.
◆ uart_init()
| void uart_init | ( | const uint8_t | port | ) |
initialize the serial port and speed.
- Parameters
-
port the port to initialize.
- Note
- it does not enable tx or rx.
◆ uart_printstr()
| void uart_printstr | ( | const uint8_t | port, |
| const char * | s | ||
| ) |
Send a C (NUL-terminated) string to the UART Tx.
- Parameters
-
port serial port 0 or 1. s NULL terminated string.
- Note
- It must be a \0 terminated string.
◆ uart_putchar()
| void uart_putchar | ( | const uint8_t | port, |
| const char | c | ||
| ) |
send a single char down to the serial port.
Send character c down the UART Tx, wait until tx holding register is empty.
- Parameters
-
port serial port 0 or 1. c char to send.
◆ uart_rx()
| void uart_rx | ( | const uint8_t | port, |
| const uint8_t | enable | ||
| ) |
enable/disable the receive part of a serial port.
- Parameters
-
port Serial port number (0 or 1) enable 0 = disable, 1 = enable
◆ uart_shutdown()
| void uart_shutdown | ( | const uint8_t | port | ) |
turn off the serial port.
- Parameters
-
port the serial port to disable.
◆ uart_tx()
| void uart_tx | ( | const uint8_t | port, |
| const uint8_t | enable | ||
| ) |
enable/disable the trasmit part of a serial port.
- Parameters
-
port Serial port number (0 or 1) enable 0 = disable, 1 = enable
