rt-thread-official/components/gdb/hal_stub.c

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/*
* I/O and interface portion of GDB stub
*
* File : hal_stub.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2014-07-04 Wzyy2 first version
*/
#include <rtthread.h>
#include <rthw.h>
#include "gdb_stub.h"
#ifdef RT_USING_SERIAL
#include <rtdevice.h>
#endif
rt_device_t gdb_dev = RT_NULL;
static struct rt_serial_device *gdb_serial;
char gdb_io_set;
void gdb_uart_putc(char c);
int gdb_uart_getc();
/*if you want to use something instead of the serial,change it */
struct gdb_io gdb_io_ops = {
gdb_uart_getc,
gdb_uart_putc
};
/**
* @ingroup gdb_stub
*
* This function will get GDB stubs started, with a proper environment
*/
void gdb_start()
{
if (gdb_dev == RT_NULL)
rt_kprintf("GDB: no gdb_dev found,please set it first\n");
else
gdb_breakpoint();
}
/**
* @ingroup gdb_stub
*
* This function sets the input device of gdb_stub.
*
* @param device_name the name of new input device.
*/
void gdb_set_device(const char* device_name)
{
rt_device_t dev = RT_NULL;
dev = rt_device_find(device_name);
if(dev == RT_NULL){
rt_kprintf("GDB: can not find device: %s\n", device_name);
return;
}
/* open this device and set the new device */
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if (rt_device_open(dev, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_STREAM) == RT_EOK)
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{
gdb_dev = dev;
gdb_serial = (struct rt_serial_device *)gdb_dev;
}
}
void gdb_uart_putc(char c)
{
#ifdef RT_GDB_DEBUG
rt_kprintf("%c",c);
#endif
rt_device_write(gdb_dev, 0, &c, 1);
}
/* polling */
int gdb_uart_getc()
{
int ch;
#ifdef RT_USING_SERIAL
ch = -1;
do {
ch = gdb_serial->ops->getc(gdb_serial);
} while (ch == -1);
#else
rt_device_read(gdb_dev, 0, &ch, 1);
#endif
#ifdef RT_GDB_DEBUG
rt_kprintf("%c",ch);
#endif
return ch;
}