Add DFU debugging capabilities (makes DFU compile if DEBUG=1)

git-svn-id: https://svn.openpcd.org:2342/trunk@203 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

2 files changed, 160 insertions, 0 deletions

diff --git a/firmware/src/dfu/dbgu.c b/firmware/src/dfu/dbgu.c
new file mode 100644
index 0000000..a95322f
--- /dev/null
+++ b/firmware/src/dfu/dbgu.c
@@ -0,0 +1,133 @@
+/* AT91SAM7 debug function implementation for OpenPCD
+ * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ *  This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <lib_AT91SAM7.h>
+#include <board.h>
+#include <dfu/dbgu.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef DEBUG
+
+#define USART_SYS_LEVEL 4
+void AT91F_DBGU_Ready(void)
+{
+	while (!(AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_TXEMPTY)) ;
+}
+
+static void DBGU_irq_handler(void)
+{
+	static char value;
+
+	AT91F_DBGU_Get(&value);
+	switch (value) {
+	default:
+		AT91F_DBGU_Printk("\n\r");
+	}
+}
+
+void AT91F_DBGU_Init(void)
+{
+	/* Open PIO for DBGU */
+	AT91F_DBGU_CfgPIO();
+	/* Enable Transmitter & receivier */
+	((AT91PS_USART) AT91C_BASE_DBGU)->US_CR = AT91C_US_RSTTX | AT91C_US_RSTRX;
+
+	/* Configure DBGU */
+	AT91F_US_Configure((AT91PS_USART) AT91C_BASE_DBGU,	// DBGU base address
+			   MCK, AT91C_US_ASYNC_MODE,	// Mode Register to be programmed
+			   AT91C_DBGU_BAUD,	// Baudrate to be programmed
+			   0);	// Timeguard to be programmed
+
+	/* Enable Transmitter & receivier */
+	((AT91PS_USART) AT91C_BASE_DBGU)->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
+
+	/* Enable USART IT error and AT91C_US_ENDRX */
+	AT91F_US_EnableIt((AT91PS_USART) AT91C_BASE_DBGU, AT91C_US_RXRDY);
+
+	/* open interrupt */
+	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SYS, USART_SYS_LEVEL,
+			      AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
+			      DBGU_irq_handler);
+	AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SYS);
+
+	AT91F_DBGU_Printk("\n\rsam7dfu (C) 2006 by Harald Welte\n\r");
+}
+
+void AT91F_DBGU_Printk(char *buffer)
+{
+	while (*buffer != '\0') {
+		while (!AT91F_US_TxReady((AT91PS_USART) AT91C_BASE_DBGU)) ;
+		AT91F_US_PutChar((AT91PS_USART) AT91C_BASE_DBGU, *buffer++);
+	}
+}
+
+void AT91F_DBGU_Frame(char *buffer)
+{
+	unsigned char len;
+
+	for (len = 0; buffer[len] != '\0'; len++) { }
+
+	AT91F_US_SendFrame((AT91PS_USART) AT91C_BASE_DBGU, 
+			   (unsigned char *)buffer, len, 0, 0);
+}
+
+int AT91F_DBGU_Get(char *val)
+{
+	if ((AT91F_US_RxReady((AT91PS_USART) AT91C_BASE_DBGU)) == 0)
+		return (0);
+	else {
+		*val = AT91F_US_GetChar((AT91PS_USART) AT91C_BASE_DBGU);
+		return (-1);
+	}
+}
+
+const char *
+hexdump(const void *data, unsigned int len)
+{
+	static char string[256];
+	unsigned char *d = (unsigned char *) data;
+	unsigned int i, left;
+
+	string[0] = '\0';
+	left = sizeof(string);
+	for (i = 0; len--; i += 3) {
+		if (i >= sizeof(string) -4)
+			break;
+		snprintf(string+i, 4, " %02x", *d++);
+	}
+	return string;
+}
+
+static char dbg_buf[2048];
+void debugp(const char *format, ...)
+{
+	va_list ap;
+
+	va_start(ap, format);
+	vsnprintf(dbg_buf, sizeof(dbg_buf)-1, format, ap);
+	va_end(ap);
+
+	dbg_buf[sizeof(dbg_buf)-1] = '\0';			
+	//AT91F_DBGU_Frame(dbg_buf);
+	AT91F_DBGU_Printk(dbg_buf);
+}
+
+#endif
diff --git a/firmware/src/dfu/dbgu.h b/firmware/src/dfu/dbgu.h
new file mode 100644
index 0000000..9f4f002
--- /dev/null
+++ b/firmware/src/dfu/dbgu.h
@@ -0,0 +1,27 @@
+#ifndef dbgu_h

+#define dbgu_h

+

+#define AT91C_DBGU_BAUD 115200

+

+#define DEBUGP(x, args ...) debugp(x, ## args)

+#define DEBUGPCR(x, args ...) DEBUGP(x "\r\n", ## args)

+#define DEBUGPCRF(x, args ...) DEBUGPCR("%s(%d): " x, __FUNCTION__, __LINE__, ## args)

+

+#ifdef DEBUG

+extern void debugp(const char *format, ...);

+extern const char *hexdump(const void *data, unsigned int len);

+extern void AT91F_DBGU_Init(void);

+extern void AT91F_DBGU_Printk(char *buffer);

+extern void AT91F_DBGU_Frame(char *buffer);

+extern int AT91F_DBGU_Get(char *val);

+#else

+#define debugp(x, args ...)

+#define hexdump(x, args ...)

+#define AT91F_DBGU_Get(x, args ...) 0;

+#define AT91F_DBGU_Frame(x)

+#define AT91F_DBGU_Printk(x)

+#define AT91F_DBGU_Init()

+#define AT91F_DBGU_Ready()

+#endif

+

+#endif /* dbgu_h */