/*
 * Authors (alphabetical order)
 * - Andre Bernet <bernet.andre@gmail.com>
 * - Andreas Weitl
 * - Bertrand Songis <bsongis@gmail.com>
 * - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
 * - Cameron Weeks <th9xer@gmail.com>
 * - Erez Raviv
 * - Gabriel Birkus
 * - Jean-Pierre Parisy
 * - Karl Szmutny
 * - Michael Blandford
 * - Michal Hlavinka
 * - Pat Mackenzie
 * - Philip Moss
 * - Rob Thomson
 * - Romolo Manfredini <romolo.manfredini@gmail.com>
 * - Thomas Husterer
 *
 * opentx is based on code named
 * gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
 * er9x by Erez Raviv: http://code.google.com/p/er9x/,
 * and the original (and ongoing) project by
 * Thomas Husterer, th9x: http://code.google.com/p/th9x/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include "../opentx.h"
#include <stdarg.h>

#if !defined(SIMU)

extern Fifo<512> debugRxFifo;

/*
 * Outputs a character on the UART line.
 *
 * This function is synchronous (i.e. uses polling).
 * c  Character to send.
 */
void debugPutc(const char c)
{
  Uart *pUart = CONSOLE_USART;

  /* Wait for the transmitter to be ready */
  while ( (pUart->UART_SR & UART_SR_TXEMPTY) == 0 ) ;

  /* Send character */
  pUart->UART_THR = c;
}

/**
 * Configures a UART peripheral with the specified parameters.
 *
 * baudrate  Baudrate at which the UART should operate (in Hz).
 * masterClock  Frequency of the system master clock (in Hz).
 * uses PA9 and PA10, RXD2 and TXD2
 */
void DEBUG_UART_Configure( uint32_t baudrate, uint32_t masterClock)
{
  register Uart *pUart = CONSOLE_USART;

  /* Configure PIO */
  configure_pins( (PIO_PA9 | PIO_PA10), PIN_PERIPHERAL | PIN_INPUT | PIN_PER_A | PIN_PORTA | PIN_NO_PULLUP ) ;

  /* Configure PMC */
  PMC->PMC_PCER0 = 1 << CONSOLE_ID;

  /* Reset and disable receiver & transmitter */
  pUart->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX
                 | UART_CR_RXDIS | UART_CR_TXDIS;

  /* Configure mode */
  pUart->UART_MR =  0x800 ;  // NORMAL, No Parity

  /* Configure baudrate */
  /* Asynchronous, no oversampling */
  pUart->UART_BRGR = (masterClock / baudrate) / 16;

  /* Disable PDC channel */
  pUart->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;

  /* Enable receiver and transmitter */
  pUart->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
  pUart->UART_IER = UART_IER_RXRDY ;
  NVIC_EnableIRQ(UART0_IRQn) ;
}

void DEBUG_UART_Stop()
{
  CONSOLE_USART->UART_IDR = UART_IDR_RXRDY ;
  NVIC_DisableIRQ(UART0_IRQn) ;
}

extern "C" void UART0_IRQHandler()
{
  debugRxFifo.push(CONSOLE_USART->UART_RHR);
}

#endif