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/**
* @file printk-support.c
*
* @ingroup tms570
*
* @brief definitions of serial line for debugging.
*/
/*
* Copyright (c) 2014 Premysl Houdek <kom541000@gmail.com>
*
* Google Summer of Code 2014 at
* Czech Technical University in Prague
* Zikova 1903/4
* 166 36 Praha 6
* Czech Republic
*
* Based on LPC24xx and LPC1768 BSP
* by embedded brains GmbH and others
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <rtems/bspIo.h>
#include <stdint.h>
#include <bsp/tms570-sci.h>
#include <bsp/tms570-sci-driver.h>
/**
* @brief Puts chars into peripheral
*
* debug functions always use serial dev 0 peripheral
*
* @retval Void
*/
static void tms570_putc(char ch)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
while ( ( driver_context_table[0].regs->FLR & 0x100 ) == 0) {
rtems_interrupt_flash(level);
}
driver_context_table[0].regs->TD = ch;
rtems_interrupt_enable(level);
}
/**
* @brief debug console output
*
* debug functions always use serial dev 0 peripheral
*
* @retval Void
*/
static void tms570_uart_output(char c)
{
if ( c == '\n' ) {
char r = '\r';
tms570_putc(r);
}
tms570_putc(c);
}
/**
* @brief debug console input
*
* debug functions always use serial dev 0 peripheral
*
* @retval x Read char
* @retval -1 No input character available
*/
static int tms570_uart_input( void )
{
if ( driver_context_table[0].regs->FLR & (1<<9) ) {
return driver_context_table[0].regs->RD;
} else {
return -1;
}
}
BSP_output_char_function_type BSP_output_char = tms570_uart_output;
BSP_polling_getchar_function_type BSP_poll_char = tms570_uart_input;
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