From d6237d52ce0553c1cf811c67807e956043fceed4 Mon Sep 17 00:00:00 2001
From: batt <batt@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Wed, 31 Mar 2010 22:08:09 +0000
Subject: [PATCH] LPC2: add debug.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3368 38d2e660-2303-0410-9eaa-f027e97ec537
---
 bertos/cpu/arm/drv/kdebug_arm.c  |  2 +
 bertos/cpu/arm/drv/kdebug_lpc2.c | 92 ++++++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 bertos/cpu/arm/drv/kdebug_lpc2.c

diff --git a/bertos/cpu/arm/drv/kdebug_arm.c b/bertos/cpu/arm/drv/kdebug_arm.c
index 9e16ba22..5ec3cded 100644
--- a/bertos/cpu/arm/drv/kdebug_arm.c
+++ b/bertos/cpu/arm/drv/kdebug_arm.c
@@ -41,6 +41,8 @@
 
 #if CPU_ARM_AT91
 	#include "kdebug_at91.c"
+#elif CPU_ARM_LPC2
+	#include "kdebug_lpc2.c"
 /*#elif  Add other ARM families here */
 #else
 	#error Unknown CPU
diff --git a/bertos/cpu/arm/drv/kdebug_lpc2.c b/bertos/cpu/arm/drv/kdebug_lpc2.c
new file mode 100644
index 00000000..0de6fb33
--- /dev/null
+++ b/bertos/cpu/arm/drv/kdebug_lpc2.c
@@ -0,0 +1,92 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief ARM debug support (implementation).
+ *
+ * \author Francesco Sacchi <batt@develer.com>
+ */
+
+#include <hw/hw_cpufreq.h>     /* for CPU_FREQ */
+#include "hw/hw_ser.h"     /* Required for bus macros overrides */
+
+#include "cfg/cfg_debug.h"
+#include <cfg/macros.h> /* for BV(), DIV_ROUND */
+
+#include <io/lpc23xx.h>
+
+#if CONFIG_KDEBUG_PORT == 0
+	#define KDBG_WAIT_READY()     while (!(U0LSR & BV(5))) {}
+	#define KDBG_WAIT_TXDONE()    while (!(U0LSR & BV(6))) {}
+
+	#define KDBG_WRITE_CHAR(c)    do { U0THR = (c); } while(0)
+
+	#define KDBG_MASK_IRQ(old)    do { \
+		(old) = U0IER; \
+		U0IER &= ~BV(1); \
+	} while(0)
+
+	#define KDBG_RESTORE_IRQ(old) do { \
+		KDBG_WAIT_TXDONE(); \
+		U0IER = (old); \
+	} while(0)
+
+	typedef uint32_t kdbg_irqsave_t;
+
+#else
+	#error CONFIG_KDEBUG_PORT should be 0
+#endif
+
+
+INLINE void kdbg_hw_init(void)
+{
+	#if CONFIG_KDEBUG_PORT == 0
+		/* Enable clock for UART0 */
+		PCONP = BV(3);
+		/* Set UART0 clk to CPU_FREQ */
+		PCLKSEL0 &= ~0xC0;
+		PCLKSEL0 |= 0x40;
+		/* Set 8bit, 1 stop bit, no parity, DLAB = 1 (enable divisor modify) */
+		U0LCR = 0x83;
+		U0DLL = DIV_ROUND(CPU_FREQ, 16 * CONFIG_KDEBUG_BAUDRATE) & 0xFF;
+		U0DLM = (DIV_ROUND(CPU_FREQ, 16 * CONFIG_KDEBUG_BAUDRATE) >> 8) & 0xFF;
+		U0FDR = 0x10;
+		/* Assign TX pin to UART0*/
+		PINSEL0 &= ~0x30;
+		PINSEL0 |= 0x10;
+		/* Set 8bit, 1 stop bit, no parity, DLAB = 0 (disable divisor modify) */
+		U0LCR = 0x03;
+		/* Enable transmitter */
+		U0TER = BV(7);
+	#else
+		#error CONFIG_KDEBUG_PORT should be 0
+	#endif /* CONFIG_KDEBUG_PORT == 0 */
+}
-- 
2.25.1