4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
33 * \brief SAM3 debug support (implementation).
35 * \author Stefano Fedrigo <aleph@develer.com>
38 #include <cfg/cfg_debug.h>
39 #include <cfg/macros.h> /* for BV() */
44 #if (CONFIG_KDEBUG_PORT == 0)
45 #define UART_BASE UART0_BASE
46 #define UART_ID UART0_ID
47 #define UART_PIO_BASE UART0_PORT
48 #define UART_PERIPH UART0_PERIPH
49 #define UART_PINS (BV(URXD0) | BV(UTXD0))
50 #elif (CONFIG_KDEBUG_PORT == 1) && UART_PORTS > 1
51 #define UART_BASE UART1_BASE
52 #define UART_ID UART1_ID
53 #define UART_PIO_BASE UART1_PORT
54 #define UART_PERIPH UART1_PERIPH
55 #define UART_PINS (BV(URXD1) | BV(UTXD1))
57 #error "UART port not supported in this board"
60 // TODO: refactor serial simple functions and use them, see lm3s kdebug
61 #define KDBG_WAIT_READY() while (!(HWREG(UART_BASE + UART_SR_OFF) & BV(UART_SR_TXRDY))) {}
62 #define KDBG_WAIT_TXDONE() while (!(HWREG(UART_BASE + UART_SR_OFF) & BV(UART_SR_TXEMPTY))) {}
64 #define KDBG_WRITE_CHAR(c) do { HWREG(UART_BASE + UART_THR_OFF) = (c); } while(0)
66 /* Debug unit is used only for debug purposes so does not generate interrupts. */
67 #define KDBG_MASK_IRQ(old) do { (void)old; } while(0)
69 /* Debug unit is used only for debug purposes so does not generate interrupts. */
70 #define KDBG_RESTORE_IRQ(old) do { (void)old; } while(0)
72 typedef uint32_t kdbg_irqsave_t;
75 INLINE void kdbg_hw_init(void)
78 * Disable PIO mode and set appropriate UART pins peripheral mode.
79 * SAM3X,A,N,S,U: all of them has all UARTs on peripheral A.
81 HWREG(UART_PIO_BASE + PIO_PDR_OFF) = UART_PINS;
82 PIO_PERIPH_SEL(UART_PIO_BASE, UART_PINS, UART_PERIPH);
84 /* Enable the peripheral clock */
85 pmc_periphEnable(UART_ID);
87 /* Reset and disable receiver & transmitter */
88 HWREG(UART_BASE + UART_CR_OFF) = BV(UART_CR_RSTRX) | BV(UART_CR_RSTTX) | BV(UART_CR_RXDIS) | BV(UART_CR_TXDIS);
90 /* Set mode: normal, no parity */
91 HWREG(UART_BASE + UART_MR_OFF) = UART_MR_PAR_NO;
94 HWREG(UART_BASE + UART_BRGR_OFF) = CPU_FREQ / CONFIG_KDEBUG_BAUDRATE / 16;
96 /* Enable receiver & transmitter */
97 HWREG(UART_BASE + UART_CR_OFF) = BV(UART_CR_RXEN) | BV(UART_CR_TXEN);