93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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. See the
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* 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief ARM debug support (implementation).
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*
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* \author Francesco Sacchi <batt@develer.com>
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*/
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#include <hw/hw_cpufreq.h> /* for CPU_FREQ */
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#include "hw/hw_ser.h" /* Required for bus macros overrides */
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#include "cfg/cfg_debug.h"
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#include <cfg/macros.h> /* for BV(), DIV_ROUND */
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#include <io/lpc23xx.h>
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#if CONFIG_KDEBUG_PORT == 0
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#define KDBG_WAIT_READY() while (!(U0LSR & BV(5))) {}
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#define KDBG_WAIT_TXDONE() while (!(U0LSR & BV(6))) {}
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#define KDBG_WRITE_CHAR(c) do { U0THR = (c); } while(0)
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#define KDBG_MASK_IRQ(old) do { \
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(old) = U0IER; \
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U0IER &= ~BV(1); \
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} while(0)
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#define KDBG_RESTORE_IRQ(old) do { \
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KDBG_WAIT_TXDONE(); \
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U0IER = (old); \
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} while(0)
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typedef uint32_t kdbg_irqsave_t;
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#else
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#error CONFIG_KDEBUG_PORT should be 0
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#endif
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INLINE void kdbg_hw_init(void)
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{
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#if CONFIG_KDEBUG_PORT == 0
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/* Enable clock for UART0 */
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PCONP = BV(3);
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/* Set UART0 clk to CPU_FREQ */
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PCLKSEL0 &= ~0xC0;
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PCLKSEL0 |= 0x40;
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/* Set 8bit, 1 stop bit, no parity, DLAB = 1 (enable divisor modify) */
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U0LCR = 0x83;
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U0DLL = DIV_ROUND(CPU_FREQ, 16 * CONFIG_KDEBUG_BAUDRATE) & 0xFF;
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U0DLM = (DIV_ROUND(CPU_FREQ, 16 * CONFIG_KDEBUG_BAUDRATE) >> 8) & 0xFF;
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U0FDR = 0x10;
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/* Assign TX pin to UART0*/
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PINSEL0 &= ~0x30;
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PINSEL0 |= 0x10;
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/* Set 8bit, 1 stop bit, no parity, DLAB = 0 (disable divisor modify) */
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U0LCR = 0x03;
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/* Enable transmitter */
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U0TER = BV(7);
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#else
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#error CONFIG_KDEBUG_PORT should be 0
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#endif /* CONFIG_KDEBUG_PORT == 0 */
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}
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