228 lines
7.6 KiB
C
228 lines
7.6 KiB
C
/***********************************************************************************************
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*LPCD驱动文件
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***********************************************************************************************/
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#include <stdio.h>
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#include "DP1312EA_Config.h"
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#include "DP1312EA.h"
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#include "LPCD.h"
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#include "nfc_platform.h"
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extern u8 Status_INT;
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/***********************************************************************************************
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*写LPCD寄存器，输入寄存器地址和要写的值
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***********************************************************************************************/
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void write_Lpcd_reg(u8 reg,u8 value)
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{
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DP1312EA_WriteRawRC(0x37,0xa0);
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DP1312EA_WriteRawRC(0x0f,reg);
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DP1312EA_WriteRawRC(0x37,0xa1);
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DP1312EA_WriteRawRC(0x0f,value);
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}
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/***********************************************************************************************
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*读取LPCD寄存器，输入寄存器地址,返回读取的值
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***********************************************************************************************/
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u8 read_Lpcd_reg(u8 reg)
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{
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u8 value;
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DP1312EA_WriteRawRC(0x37,0xa0);
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DP1312EA_WriteRawRC(0x0f,reg);
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DP1312EA_WriteRawRC(0x37,0xa1);
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value = DP1312EA_ReadRawRC(0x0f);
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return value;
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}
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/***********************************************************************************************
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*读取LPCD I通道寄存器值
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***********************************************************************************************/
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u8 Read_I_Channel(void)
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{
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u8 i;
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DP1312EA_WriteRawRC(0x37,0xa0);
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DP1312EA_WriteRawRC(0x0f,0x05);
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DP1312EA_WriteRawRC(0x37,0xa1);
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i = DP1312EA_ReadRawRC(0x0f); //LPCD_RI
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return i;
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}
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/***********************************************************************************************
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*读取LPCD Q通道寄存器值
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***********************************************************************************************/
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u8 Read_Q_Channel(void)
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{
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u8 q;
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DP1312EA_WriteRawRC(0x37,0xa0);
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DP1312EA_WriteRawRC(0x0f,0x06);
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DP1312EA_WriteRawRC(0x37,0xa1);
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q = DP1312EA_ReadRawRC(0x0f); //LPCD_RQ
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return q;
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}
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/***********************************************************************************************
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*设置LPCD I/Q通道唤醒阈值
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***********************************************************************************************/
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void set_I_Q_threshold(u8 I_value,u8 Q_value)
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{
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u8 I_MIN,I_MAX;
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u8 Q_MIN,Q_MAX;
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if((I_value>=LPCD_Sensitive_Value)&&(Q_value>=LPCD_Sensitive_Value))
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{
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I_MIN = I_value - LPCD_Sensitive_Value;
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I_MAX = I_value + LPCD_Sensitive_Value;
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Q_MIN = Q_value - LPCD_Sensitive_Value;
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Q_MAX = Q_value + LPCD_Sensitive_Value;
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}
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else
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{
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I_MIN = 0x9c;
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I_MAX = 0x9c;
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Q_MIN = 0x7c;
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Q_MAX = 0x7c;
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}
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write_Lpcd_reg(0x01,I_MAX);
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write_Lpcd_reg(0x02,I_MIN);
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write_Lpcd_reg(0x03,Q_MAX);
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write_Lpcd_reg(0x04,Q_MIN);
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}
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/***********************************************************************************************
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*禁止LPCD，若唤醒后读卡没有复位读卡芯片，需要读卡前先禁止LPCD功能
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***********************************************************************************************/
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void DP1312EA_LPCD_Stop(void)
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{
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DP1312EA_WriteRawRC(0x37,0xa0);
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DP1312EA_WriteRawRC(0x0f,0x00);
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DP1312EA_WriteRawRC(0x37,0xa1);
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DP1312EA_WriteRawRC(0x0f,0x00);
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}
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/***********************************************************************************************
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*清除读卡芯片LPCD中断标志位
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***********************************************************************************************/
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void Clear_lpcd_irq(void)
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{
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DP1312EA_WriteRawRC(DivIrqReg,0x20); //清中断标记
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}
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/**********************************************************************************************************
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*函数名称：void DP1312EA_LPCD_Enter(u16 cycle,u16 duration )
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*功能描述：
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设置并进入LPCD模式，有操作顺序要求，不要改动操作顺序。
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*输入参数：
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cycle：检测周期，16位，默认0x22ff，380ms，误差约10%；
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duration：检测时长，16位，默认0x001f，2.5us；可选0x003f=5us,0x007f=10us；
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*返回参数：
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无
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*其它输出：
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IRQ中断，1)可选CMOS输出或开漏输出，开漏输出需外接上拉电阻；2)可选高电平中断或低电平中断；
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**********************************************************************************************************/
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void DP1312EA_LPCD_Enter(u16 cycle,u16 duration )
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{
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u8 i,q,n;
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n = DP1312EA_ReadRawRC(0x0c);
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DP1312EA_WriteRawRC(0x0c, n|0x10);
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//DP1312EA_WriteRawRC(0x28,0x02); //视测试效果启用,调节灵敏度
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/*set IRQ int level*/
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#if (IRQ_LEVEL_SET == IRQ_HIGH_LEVEL)
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DP1312EA_WriteRawRC(ComIEnReg,0x00); //ComIEnReg的bit7 置0，高电平中断
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#else
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DP1312EA_WriteRawRC(ComIEnReg,0x80); //ComIEnReg的bit7 置1，低电平中断
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#endif
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/*set IRQ Output Mode*/
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#if (IRQ_OUT_MODE == IRQ_OUT_PP)
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DP1312EA_WriteRawRC(DivlEnReg,0xE0); //bit7=1设置为CMOS输出，bit5=1 LPCD中断使能
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#else
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DP1312EA_WriteRawRC(DivlEnReg,0x60); //bit7=0设置为OPEN DRAIN输出，bit5=1 LPCD中断使能
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#endif
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DP1312EA_WriteRawRC(DivIrqReg,0x7F); //清中断标记
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//设置检测时长
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write_Lpcd_reg(0x08,(u8)(duration>>8)); //时长高位寄存器
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write_Lpcd_reg(0x09,(u8)duration); //时长低位寄存器
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//设置检测周期
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write_Lpcd_reg(0x0a,0x00); //检测周期高位寄存器
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write_Lpcd_reg(0x0b,0xff); //检测周期低位寄存器
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//准备启动操作1
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write_Lpcd_reg(0x01,0xf0); //LPCD操作寄存器
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write_Lpcd_reg(0x02,0x00);
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write_Lpcd_reg(0x03,0xf0); //LPCD操作寄存器
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write_Lpcd_reg(0x04,0x00);
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//使能LPCD，与启动要分开
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write_Lpcd_reg(0x00,0x50); //enable LPCD
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//启动LPCD
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write_Lpcd_reg(0x00,0xd0); //start LPCD
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//读取控制寄存器，不是必须的，为了观察
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n=read_Lpcd_reg(0x00);
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#ifdef UART_DEBUG
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nfc_platform_log("lpcd_00reg = %02x \n",n);
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#endif
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nfc_platform_sleep_ms(5);
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//启动载波并等待一个校准周期
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DP1312EA_WriteRawRC(TxControlReg,0x83);
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nfc_platform_sleep_ms(20);
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//读取I/Q值
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i = Read_I_Channel();
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q = Read_Q_Channel();
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#ifdef UART_DEBUG
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nfc_platform_log("lpcd_: I:%02X ,Q:%02X\n",i,q);
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#endif
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//设置唤醒阈值
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set_I_Q_threshold(i,q);
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//设定检测时长；
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write_Lpcd_reg(0x08,(u8)(duration>>8)); //时长高位寄存器
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write_Lpcd_reg(0x09,(u8)duration); //时长低位寄存器
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//设定最终检测周期
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write_Lpcd_reg(0x0a,(u8)(cycle>>8));
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write_Lpcd_reg(0x0b,(u8)(cycle));
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DP1312EA_WriteRawRC(DivIrqReg,0x7F); //清中断标记
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}
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/***********************************************************************************************
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*等待卡中断
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***********************************************************************************************/
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u8 DP1312EA_CLEAR_IRQ(void)
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{
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Clear_lpcd_irq();
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return MI_OK;
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}
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/***********************************************************************************************
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*启动LPCD并等待中断
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***********************************************************************************************/
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void DP1312EA_LPCD_Start(void)
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{
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DP1312EA_Reset();
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nfc_platform_sleep_ms(5);
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DP1312EA_LPCD_Enter(LPCD_Cycle_Time,LPCD_Duration_Time);
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}
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/**************************************************END*****************************************/
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