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/* 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 */
/* FIXME: This should be HIGH_LEVEL, but somehow this triggers an
* interrupt storm. no idea why it's working in 'os' but not in 'dfu'
* */
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SYS, USART_SYS_LEVEL,
AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE,
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
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