c - RFID:TMS3705 RFid 应答器基站 IC 和 TMS37157 RFid 设备之间的通信应使用多少 PowerBurst 时间？

Question

这些 PowerBurst 时间用于 TMS37157 Development Tool FAQ 中引用的示例代码。 ，但似乎不知道这些值是什么。看起来它们是由桌面应用程序提供的，但我只有二进制文件。

struct stLFpacket               
{
    unsigned short usPowerBurst[4];
    ...
struct stLFpacket aLFpacket;
...
void DoPowerBurst(char number)
{
    if ((command1.field.PPM_PWM == 1) && (number == 2))
        SetOutput(&P1OUT, P1_TXCT, HIGH, BLCtimes.usToff, USEC, HALT);      
    SetOutput(&P1OUT, P1_TXCT, LOW, aLFpacket.usPowerBurst[number-1], MSEC, 
        HALT);
}
...
void GetPowerBurst(char number, char* Index)
{
    if (command1.field.TwoPB_OnePB == ONE_BYTE)
            aLFpacket.usPowerBurst[number-1] = USB_Buffer.ucData[*Index];
    else
            aLFpacket.usPowerBurst[number-1] = 16 * USB_Buffer.ucData[*Index] 
                + USB_Buffer.ucData[(*Index)+1];
    *Index++;
}

Answer 1

根据 support@ti.com，

The power burst times used for TMS37157 should be 15-50ms for PB1 and 50ms for PB2. In the base station source code, dopowerburst(2), dopowerburst(3), dopowerburst(4) appear to be used for wake patterns in some of our other automotive transponders that operate a little different from TMS37157.