131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
#include <rtthread.h>
|
||
#include <windows.h>
|
||
#include <mmsystem.h>
|
||
#include <stdio.h>
|
||
#include "serial.h"
|
||
|
||
struct serial_int_rx serial_rx;
|
||
extern struct rt_device serial_device;
|
||
|
||
/*
|
||
* Handler for OSKey Thread
|
||
*/
|
||
static HANDLE OSKey_Thread;
|
||
static DWORD OSKey_ThreadID;
|
||
|
||
static DWORD WINAPI ThreadforKeyGet(LPVOID lpParam);
|
||
void rt_hw_usart_init(void)
|
||
{
|
||
|
||
/*
|
||
* create serial thread that revice key input from keyboard
|
||
*/
|
||
|
||
OSKey_Thread = CreateThread(NULL,
|
||
0,
|
||
(LPTHREAD_START_ROUTINE)ThreadforKeyGet,
|
||
0,
|
||
CREATE_SUSPENDED,
|
||
&OSKey_ThreadID);
|
||
if(OSKey_Thread == NULL)
|
||
{
|
||
//Display Error Message
|
||
|
||
return;
|
||
}
|
||
SetThreadPriority(OSKey_Thread,
|
||
THREAD_PRIORITY_NORMAL);
|
||
SetThreadPriorityBoost(OSKey_Thread,
|
||
TRUE);
|
||
SetThreadAffinityMask(OSKey_Thread,
|
||
0x01);
|
||
/*
|
||
* Start OS get key Thread
|
||
*/
|
||
ResumeThread(OSKey_Thread);
|
||
|
||
}
|
||
|
||
/*
|
||
* 方向键(←)： 0xe04b
|
||
* 方向键(↑)： 0xe048
|
||
* 方向键(→)： 0xe04d
|
||
* 方向键(↓)： 0xe050
|
||
*/
|
||
static int savekey(unsigned char key)
|
||
{
|
||
/* save on rx buffer */
|
||
{
|
||
rt_base_t level;
|
||
|
||
/* disable interrupt */
|
||
//暂时关闭中断，因为要操作uart数据结构
|
||
level = rt_hw_interrupt_disable();
|
||
|
||
/* save character */
|
||
serial_rx.rx_buffer[serial_rx.save_index] = key;
|
||
serial_rx.save_index ++;
|
||
//下面的代码检查save_index是否已经到到缓冲区尾部，如果是则回转到头部，称为一个环形缓冲区
|
||
if (serial_rx.save_index >= SERIAL_RX_BUFFER_SIZE)
|
||
serial_rx.save_index = 0;
|
||
|
||
//这种情况表示反转后的save_index追上了read_index，则增大read_index，丢弃一个旧的数据
|
||
/* if the next position is read index, discard this 'read char' */
|
||
if (serial_rx.save_index == serial_rx.read_index)
|
||
{
|
||
serial_rx.read_index ++;
|
||
if (serial_rx.read_index >= SERIAL_RX_BUFFER_SIZE)
|
||
serial_rx.read_index = 0;
|
||
}
|
||
|
||
/* enable interrupt */
|
||
//uart数据结构已经操作完成，重新使能中断
|
||
rt_hw_interrupt_enable(level);
|
||
}
|
||
|
||
/* invoke callback */
|
||
if (serial_device.rx_indicate != RT_NULL)
|
||
{
|
||
rt_size_t rx_length;
|
||
|
||
/* get rx length */
|
||
rx_length = serial_rx.read_index > serial_rx.save_index ?
|
||
SERIAL_RX_BUFFER_SIZE - serial_rx.read_index + serial_rx.save_index :
|
||
serial_rx.save_index - serial_rx.read_index;
|
||
|
||
serial_device.rx_indicate(&serial_device, rx_length);
|
||
}
|
||
return 0;
|
||
}
|
||
static DWORD WINAPI ThreadforKeyGet(LPVOID lpParam)
|
||
{
|
||
unsigned char key;
|
||
|
||
(void)lpParam; //prevent compiler warnings
|
||
|
||
for(;;)
|
||
{
|
||
key = _getch();//getchar();
|
||
if (key == 0xE0)
|
||
{
|
||
key = _getch();
|
||
|
||
if (key == 0x48) //up key , 0x1b 0x5b 0x41
|
||
{
|
||
savekey(0x1b);
|
||
savekey(0x5b);
|
||
savekey(0x41);
|
||
}
|
||
else if (key == 0x50)//0x1b 0x5b 0x42
|
||
{
|
||
savekey(0x1b);
|
||
savekey(0x5b);
|
||
savekey(0x42);
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
savekey(key);
|
||
}
|
||
} /*** ThreadforKeyGet ***/ |