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652 theseven 1 
//
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//
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//    Copyright 2011 TheSeven
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//
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//
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//    This file is part of emCORE.
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//
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//    emCORE is free software: you can redistribute it and/or
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//    modify it under the terms of the GNU General Public License as
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//    published by the Free Software Foundation, either version 2 of the
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//    License, or (at your option) any later version.
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//
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//    emCORE is distributed in the hope that it will be useful,
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//    but WITHOUT ANY WARRANTY; without even the implied warranty of
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//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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//    See the GNU General Public License for more details.
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//
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//    You should have received a copy of the GNU General Public License along
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//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.
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//
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//
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495 theseven 24 
#include "emcoreapp.h"
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#define ULCON  (*((uint32_t volatile*)0x3cc00000))
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#define UCON   (*((uint32_t volatile*)0x3cc00004))
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#define UFCON  (*((uint32_t volatile*)0x3cc00008))
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#define UMCON  (*((uint32_t volatile*)0x3cc0000c))
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#define UFSTAT (*((uint32_t volatile*)0x3cc00018))
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#define UTXH   (*((uint8_t volatile*)0x3cc00020))
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#define URXH   (*((uint8_t volatile*)0x3cc00024))
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#define UBRDIV (*((uint32_t volatile*)0x3cc00028))
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static void uart_tx(char byte)
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{
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    while (UFSTAT & BIT(9)) sleep(100);
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    UTXH = byte;
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}
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static char uart_rx()
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{
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    while (!(UFSTAT & BITRANGE(0, 3))) sleep(100);
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    return URXH;
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}
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static void main(int argc, const char** argv)
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{
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    int i;
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    clockgate_enable(41, true);
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    ULCON = 3;
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    UCON = 0x405;
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    UFCON = 7;
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    UMCON = 0;
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    switch (get_platform_id())
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    {
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    case 0x47324e49:  // IN2G
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        UBRDIV = 38;
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        break;
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    case 0x4c435049:  // IPCL
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        UBRDIV = 18;
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        break;
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    default:
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        panic(PANIC_KILLTHREAD, "Unknown platform!");
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    }
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    uart_tx('~');
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    while (true) uart_tx(uart_rx() ^ 0x20);
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}
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EMCORE_APP_HEADER("UART test", main, 127)