236 lines
8.5 KiB
C
236 lines
8.5 KiB
C
/***********************************************************
|
||
** FileName: IRDecode.c
|
||
** Introductions: IR Remote decode for MCU of CC2530
|
||
** Last Modify time: 2013.05.03
|
||
** Update: 基本解码测试
|
||
** Author: GuoZhenjiang<zhenjiang.guo@sunplusapp.com>
|
||
** Modify:
|
||
** 2013.05.03 lijian Change File Name to hal_irdec.c
|
||
***********************************************************/
|
||
#include <hal_board.h>
|
||
#include "hal_irdec.h"
|
||
#include <string.h>
|
||
|
||
#if defined(HAL_IRDEC) && (HAL_IRDEC == TRUE)
|
||
static struct {
|
||
uint8 IRIntTskId;
|
||
uint8 IRIntEp;
|
||
OSALIRDecData_t IRCodeTab;
|
||
} IRDecodeRes;
|
||
|
||
volatile uint8 IROverTimeAdd_En=FALSE, IROverTimeOvf_flg=FALSE;
|
||
volatile uint16 IROverTimeAdd_cnt=0;
|
||
volatile IRDecodeSta_t IRDeodeSta = WaitForGuideTrig1;
|
||
static uint8 cnt_Byte, cnt_bit; // 用于控制解码过程的基本变量
|
||
|
||
/***********************************************************
|
||
** 函数名称: IRDecodeT1Init
|
||
** 实现功能: 中断法进行红外解码初始化工作
|
||
** 入口参数: None
|
||
** 返回结果: None
|
||
***********************************************************/
|
||
void IRDecodeT1Init(uint8 taskid, uint8 ep)
|
||
{
|
||
// 保存任务号和端点号
|
||
IRDecodeRes.IRIntTskId = taskid;
|
||
IRDecodeRes.IRIntEp = ep;
|
||
|
||
// 初始化Timer1
|
||
P1SEL |= 0x04; // 配置P1.2为Timer1的外设功能引脚
|
||
P1DIR &= ~0x04; // 输入捕获引脚必须设置为输入
|
||
PERCFG |= 0x40; // Timer1占用第2引脚位置(通道0为P1.2)
|
||
P2SEL |= 0x04; // 当USART0和Timer1分配了相同引脚，Timer1优先
|
||
|
||
// 定时器1初始化
|
||
T1CTL = (uint8)Tdiv_32 | (uint8)Tmod_stop; // 1MHz,暂停运行
|
||
CLR_T1CNT; // 清零定时器1
|
||
|
||
// Timer1通道0上升沿输入捕获设置
|
||
T1CCTL0 = 0x01; // 上升沿捕获,通道0输入捕获中断未使能,查询中断标志即可
|
||
T1CCTL0 |= 0x40; // T1CCTL0.IM 定时器1通道0中断开关
|
||
T1STAT = 0;
|
||
IEN1 |= 0x02; // IEN1.T1IE 定时器1中断总开关
|
||
EA = 1; // IEN0.EA 全局总中断开关
|
||
|
||
// 初始化Time4
|
||
P2SEL |= 0x10; // 定时器4优先级高于定时器1
|
||
T4CTL |= 0xEC; // 128分频,清空计数值,允许溢出中断,自由运行
|
||
T4CTL |= 0x10; // 启动定时器
|
||
IEN1 |= 0x10; // 打开定时器4总中断
|
||
}
|
||
|
||
/***********************************************************
|
||
** 函数名称: Timer1_ISR
|
||
** 实现功能: Timer1 中断处理函数,利用Timer1通道0输入捕获功能实现红外解码
|
||
** 入口参数: None
|
||
** 返回结果: None
|
||
***********************************************************/
|
||
HAL_ISR_FUNC_DECLARATION(Timer1_ISR, T1_VECTOR);
|
||
HAL_ISR_FUNCTION(Timer1_ISR, T1_VECTOR)
|
||
{
|
||
#define CLR_T1CH0_IF T1STAT &= 0xFE
|
||
#define CLR_T1CH1_IF T1STAT &= 0xFD
|
||
#define CLR_T1OVF_IF T1STAT &= 0xDF
|
||
#define CLR_T1IF IRCON &= 0xFD
|
||
|
||
static uint8 IRdata[15]; // 用于存储解析的红外数据
|
||
static uint16 tCapture = 0; // 用于存储判断每个捕获周期
|
||
|
||
// 红外解码中捕获到定时器1通道0上升沿
|
||
if(T1STAT & 0x01)
|
||
{
|
||
switch(IRDeodeSta)
|
||
{
|
||
case WaitForGuideTrig1:
|
||
IRDeodeSta = WaitForGuideTrig2;
|
||
CLR_T1CNT; // 清零定时器1
|
||
T1CTL = (uint8)Tdiv_32 | (uint8)Tmod_free; // 1MHz,自由计数模式
|
||
break;
|
||
case WaitForGuideTrig2:
|
||
tCapture = T1CC0L; // 获取当前一个周期值
|
||
tCapture |= (uint16)T1CC0H << 8;
|
||
CLR_T1CNT; // 清零定时器1
|
||
T1CTL = (uint8)Tdiv_32 | (uint8)Tmod_free; // 1MHz,自由计数模式
|
||
// 如果是引导码4.5ms引导码或者9ms引导码
|
||
if(((tCapture > T_IR_GUIDE9_MIN) && (tCapture < T_IR_GUIDE9_MAX)) || ((tCapture > T_IR_GUIDE4_MIN) && (tCapture < T_IR_GUIDE4_MAX)))
|
||
{
|
||
IRDeodeSta = Decoding;
|
||
// 准备解码工作
|
||
cnt_bit = 0;
|
||
cnt_Byte = 0;
|
||
}
|
||
else
|
||
IRDeodeSta = WaitForGuideTrig1;
|
||
IROverTimeAdd_cnt = 0;
|
||
break;
|
||
case Decoding:
|
||
tCapture = T1CC0L; // 获取当前一个周期值
|
||
tCapture |= (uint16)T1CC0H << 8;
|
||
CLR_T1CNT; // 清零定时器1
|
||
T1CTL = (uint8)Tdiv_32 | (uint8)Tmod_free; // 1MHz,自由计数模式
|
||
// 接收到位0?
|
||
if((tCapture > T_IR_0_MIN) && (tCapture < T_IR_0_MAX))
|
||
{
|
||
IRDeodeSta = Decoding;
|
||
IROverTimeAdd_cnt = 0;
|
||
IRdata[cnt_Byte] &= ~(0x80 >> cnt_bit); // 保存当前位0
|
||
cnt_bit++;
|
||
if(cnt_bit >= 8) // 接收完毕一个字节
|
||
{
|
||
IRDecodeRes.IRCodeTab.irCode[cnt_Byte] = IRdata[cnt_Byte];
|
||
cnt_bit=0;
|
||
cnt_Byte++;
|
||
if(cnt_Byte >= 15) // 超出最大接收队列长度
|
||
{
|
||
IRDeodeSta = Decode_BufOverflow;
|
||
goto OneIRpkgGot;
|
||
}
|
||
}
|
||
}
|
||
// 接收到位1?
|
||
else if((tCapture > T_IR_1_MIN) && (tCapture < T_IR_1_MAX))
|
||
{
|
||
IRDeodeSta = Decoding;
|
||
IROverTimeAdd_cnt = 0;
|
||
IRdata[cnt_Byte] |= 0x80 >> cnt_bit; // 保存当前位0
|
||
cnt_bit++;
|
||
if(cnt_bit >= 8) // 接收完毕一个字节
|
||
{
|
||
IRDecodeRes.IRCodeTab.irCode[cnt_Byte] = IRdata[cnt_Byte];
|
||
cnt_bit=0;
|
||
cnt_Byte++;
|
||
if(cnt_Byte >= 15) // 超出最大接收队列长度
|
||
{
|
||
IRDeodeSta = Decode_BufOverflow;
|
||
goto OneIRpkgGot;
|
||
}
|
||
}
|
||
}
|
||
// 没有超时,不是位0,不是位1,出错???
|
||
else
|
||
{
|
||
IRDeodeSta = Decode_OverUnknow;
|
||
goto OneIRpkgGot;
|
||
}
|
||
break;
|
||
default :
|
||
IRDeodeSta = WaitForGuideTrig1;
|
||
break;
|
||
}
|
||
OneIRpkgGot:
|
||
{
|
||
switch(IRDeodeSta) // 一次红外解码结束
|
||
{
|
||
// 处理 接收队列溢出导致解码结束
|
||
case Decode_BufOverflow:
|
||
// 处理 未知原因导致解码结束
|
||
case Decode_OverUnknow:
|
||
IROverTimeAdd_cnt = 0;
|
||
IRDecodeRes.IRCodeTab.irLen = cnt_Byte;
|
||
cnt_bit = 0;
|
||
cnt_Byte = 0;
|
||
OSALIRDecIntData_t* T1Ch0IntData;
|
||
T1Ch0IntData = (OSALIRDecIntData_t *)osal_msg_allocate(sizeof(OSALIRDecIntData_t));
|
||
T1Ch0IntData->hdr.event = IRDEC_INT_EVENT;
|
||
T1Ch0IntData->endPoint = IRDecodeRes.IRIntEp;
|
||
T1Ch0IntData->data = &IRDecodeRes.IRCodeTab;
|
||
osal_msg_send(IRDecodeRes.IRIntTskId, (uint8*)(T1Ch0IntData));
|
||
IRDeodeSta = WaitForGuideTrig1;
|
||
break;
|
||
default :
|
||
break;
|
||
}
|
||
}
|
||
CLR_T1CH0_IF; // 清除通道0输入捕获中断标志
|
||
}
|
||
CLR_T1IF; // 清除T1IF
|
||
}
|
||
|
||
/***********************************************************
|
||
** 函数名称: Timer4_ISR
|
||
** 实现功能: Timer4 中断处理函数,利用Timer1通道0输入捕获功能实现红外解码
|
||
** 入口参数: None
|
||
** 返回结果: None
|
||
***********************************************************/
|
||
HAL_ISR_FUNC_DECLARATION(Timer4_ISR, T4_VECTOR);
|
||
HAL_ISR_FUNCTION(Timer4_ISR, T4_VECTOR)
|
||
{
|
||
// (32MHz / 128) T = 4us; f = 250000Hz;
|
||
switch(IRDeodeSta)
|
||
{
|
||
// 等待第二次触发,检测引导码是否超时
|
||
case WaitForGuideTrig2:
|
||
IROverTimeAdd_cnt++;
|
||
if(IROverTimeAdd_cnt >= 16) // 约16ms内没有清零
|
||
{
|
||
IROverTimeAdd_cnt = 0;
|
||
IRDeodeSta = WaitForGuideTrig1;
|
||
}
|
||
break;
|
||
// 位0 位1 解码中,检测是否解码超时
|
||
case Decoding:
|
||
IROverTimeAdd_cnt++;
|
||
if(IROverTimeAdd_cnt >= 5) // 4ms内没有清零
|
||
{
|
||
IROverTimeAdd_cnt = 0;
|
||
IRDecodeRes.IRCodeTab.irLen = cnt_Byte;
|
||
cnt_bit = 0;
|
||
cnt_Byte = 0;
|
||
OSALIRDecIntData_t* T4OvfIntData;
|
||
T4OvfIntData = (OSALIRDecIntData_t *)osal_msg_allocate(sizeof(OSALIRDecIntData_t));
|
||
T4OvfIntData->hdr.event = IRDEC_INT_EVENT;
|
||
T4OvfIntData->endPoint = IRDecodeRes.IRIntEp;
|
||
T4OvfIntData->data = &IRDecodeRes.IRCodeTab;
|
||
osal_msg_send(IRDecodeRes.IRIntTskId, (uint8*)(T4OvfIntData));
|
||
IRDeodeSta = WaitForGuideTrig1;
|
||
}
|
||
break;
|
||
default :
|
||
IROverTimeAdd_cnt = 0;
|
||
break;
|
||
}
|
||
T4OVFIF = 0; // 清除定时器4溢出中断标志
|
||
T4IF = 0; // 清除定时器4总中断标志
|
||
}
|
||
#endif //#if defined(HAL_IRDEC) && (HAL_IRDEC == TRUE)
|