uart_lib.c File Reference

#include "uart_lib.h"

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Functions
r_uart_gtchar	uart_getchar (void)
bit	uart_init (void)
r_uart_ptchar	uart_putchar (p_uart_ptchar ch)
bit	uart_test_hit (void)

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Function Documentation

r_uart_gtchar uart_getchar

(

void

)

This function allows to get a character from the UART

Returns:

character read.

Definition at line 71 of file uart_lib.c.

Referenced by build_cmd(), and ushell_task_init().

{
  register char c;

  while(!Uart_rx_ready());
  c = Uart_get_byte();
  Uart_ack_rx_byte();
  return c;
}

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bit uart_init

(

void

)

This function configures the UART configuration and timming following the constant definition of BAUDRATE and enables the UART controller.

Precondition:

before calling this function some declaration must be define in config.h:

• FOSC Frequency of crystal in kHz (mandatory)Standard crystals available
• BAUDRATE Baudrate in bit per second used for UART configuration (mandatory)
• UART_CONFIG : (by default 8 bits| 1 bit stop |without parity)

Definition at line 43 of file uart_lib.c.

Referenced by ushell_task_init().

{
#ifndef UART_U2
  Uart_set_baudrate(BAUDRATE);
  Uart_hw_init(UART_CONFIG);
#else
  Uart_set_baudrate(BAUDRATE/2);
  Uart_double_bdr();
  Uart_hw_init(UART_CONFIG);

#endif
  Uart_enable();
  return TRUE;
}

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r_uart_ptchar uart_putchar

(

p_uart_ptchar

uc_wr_byte

)

This function allows to send a character on the UART

Parameters:

uc_wr_byte

character to print on UART.

Returns:

character sent.

Note:

the type p_uart_ptchar and r_uart_ptchar can be define to macth with a printf need.

Definition at line 59 of file uart_lib.c.

{
  while(!Uart_tx_ready());
  Uart_set_tx_busy(); // Set Busy flag before sending (always)
  Uart_send_byte(ch);
    
  return ch;
}

bit uart_test_hit

(

void

)

This function allows to inform if a character was received

Returns:

True if character received.

Definition at line 37 of file uart_lib.c.

Referenced by build_cmd().

{
return Uart_rx_ready();
}

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