[参考译文] TRF7970A：无法锁定块 ISO15693 RFID

尊敬的 Charles：

感谢您提供的信息和建议。 很遗憾、由于项目时间限制、我们无法更改以使用您在上面提到的不同应用手册、  

是否可以将 RFID 块锁定到应用手册 sloc297c 的代码中?

非常感谢您的帮助。

你(们)好

 您可以参考我参考的应用手册、并遵循它如何在块上实现锁定、并根据当前代码对其进行添加/修改。  

你(们)好

 您可以参考我参考的应用手册、并遵循它如何在块上实现锁定并将其添加到当前代码中。  

尊敬的 Charles：

谢谢你,我会试一下,让你知道。

Le

尊敬的 Charles：

是 sloa227b 吗?

是 sloa227b 吗?

您好！

 是的、这是 sloa227。  https://www.ti.com/lit/pdf/sloa227

尊敬的 Charles：

在 sloa227中很难/很难遵循代码。  

有一点我不明白、我们还针对不同项目使用了另一个应用手册(别记住应用手册名称)、它用于 MSP430F2370和 TRF7970a、锁 A 块运行良好。 我使用该应用手册中的相同命令根据上述代码实现到 sloc297c 应用手册工程中、但它始终返回 NO_RECEIVE_RESPONSE。  

谢谢你

尊敬的 Le：

 我不是该产品的专家。 我不知道在这种情况下出了什么问题。 您的标签是否支持锁定块？ 存储器格式是否可能不同？ 我发现此应用手册介绍了如何使用 ISO15693命令、包括发出锁定命令。  https://www.ti.com/lit/pdf/sloa141

请提供帮助。

您好！

 您可以查看此帖子吗？ 我希望它对您有所帮助。  

https://e2e.ti.com/support/wireless-connectivity/other-wireless-group/other-wireless/f/other-wireless-technologies-forum/619581/trf7970a-lock-kill-process-of-trf7970a?tisearch=e2e-sitesearch&keymatch=trf7970a%2525252525252520lock#

尊敬的 Le：

 我找到这个函数来锁定块。 希望您能根据需要加以利用和调整。  

//*****************************************************************************
//
//! ISO15693_sendLockBlock - Issue the Lock Block command
//! for ISO15693 tags.
//!
//! \param ui8ReqFlag are the request flags for ISO15693 commands.
//! \param ui8BlockNumber is the block number to write data to.
//! \param ui8BlockSize is the tag block size.
//! \param pui8BlockData is the data to be written.
//!
//! Function issues an addressed Lock Block with the specified request
//! flags as well as the address flag. 
//!
//! The function will always add the address flag to the command as a good
//! practice to avoid locking other ISO15693 tags in the vicinity.
//!
//! \return ui8Status returns either STATUS_SUCCESS or STATUS_FAIL to
//! indicate if the Lock Block was successful or not.
//
//*****************************************************************************

uint8_t ISO15693_sendLockBlock(uint8_t ui8ReqFlag, uint8_t ui8BlockNumber)
{
	uint8_t ui8Offset = 0;
	uint8_t ui8Status = STATUS_FAIL;

	ui8ReqFlag = ui8ReqFlag | 0x20; 		// Mandatory use of addressed writes - highly recommended practice

	g_pui8TrfBuffer[ui8Offset++] = 0x8F;		// Reset FIFO
	g_pui8TrfBuffer[ui8Offset++] = 0x91;		// Send with CRC
	g_pui8TrfBuffer[ui8Offset++] = 0x3D;		// Write Continuous
	g_pui8TrfBuffer[ui8Offset++] = 0x00;	// Length of packet in bytes - upper and middle nibbles of transmit byte length
	g_pui8TrfBuffer[ui8Offset++] = 0xB0;			// Length of packet in bytes - lower and broken nibbles of transmit byte length
	g_pui8TrfBuffer[ui8Offset++] = ui8ReqFlag;	// ISO15693 flags
	g_pui8TrfBuffer[ui8Offset++] = 0x22;			// Lock Block command code
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[0];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[1];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[2];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[3];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[4];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[5];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[6];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = g_pui8Iso15693UId[7];	// Tag UID
	g_pui8TrfBuffer[ui8Offset++] = ui8BlockNumber;		// Block # (variable, for HF-I Plus device can go to 0x3F, Pro and Standard handled with "error" response flags)

	TRF79xxA_writeRaw(&g_pui8TrfBuffer[0], ui8Offset);		// Issue the Get System Information command

	g_sTrfStatus = TRF79xxA_getTrfStatus();

	// Special handling to cover option flag use case for TI Tag-It HF-I ISO15693 transponders
	if (g_sTrfStatus == TRF_IDLE || g_sTrfStatus == TX_WAIT)
	{
		// Check if the option flag is set
		if (ui8ReqFlag & 0x40)
		{
			TRF79xxA_waitTxIRQ(10);	// 10 millisecond TX timeout

			g_sTrfStatus = TRF79xxA_getTrfStatus();

			if (g_sTrfStatus == TX_COMPLETE)	// If transmit is complete
			{
				MCU_delayMillisecond(10);
				TRF79xxA_sendDirectCommand(TRF79XXA_TRANSMIT_NEXT_SLOT_CMD);		// Send out End of Frame marker
				TRF79xxA_waitRxIRQ(30);				// 30 millisecond RX timeout
			}
			else								// Otherwise return an error
			{
				return ui8Status = STATUS_FAIL;
			}
		}
		else
		{
			TRF79xxA_waitTxIRQ(10);	// 10 millisecond TX timeout
			TRF79xxA_waitRxIRQ(30);	// 30 millisecond RX timeout
		}
	}
	else if (g_sTrfStatus == TX_COMPLETE)
	{
		// Check if the option flag is set
		if (ui8ReqFlag & 0x40)
		{
			MCU_delayMillisecond(10);
			TRF79xxA_sendDirectCommand(TRF79XXA_TRANSMIT_NEXT_SLOT_CMD);		// Send out End of Frame marker
		}

		TRF79xxA_waitRxIRQ(30);				// 30 millisecond RX timeout
	}
	else
	{
		return ui8Status = STATUS_FAIL;
	}

	g_sTrfStatus = TRF79xxA_getTrfStatus();

	if (g_sTrfStatus == RX_COMPLETE)		// If data has been received
	{
		if (g_pui8TrfBuffer[0] == 0x00)		// Confirm "no error" in response flags byte
		{
			// Response received
			ui8Status = STATUS_SUCCESS;
		}
		else		// An error has been sent back in the response byte
		{
			ui8Status = STATUS_FAIL;
		}
	}
	else
	{
		// No response
		ui8Status = STATUS_FAIL;
	}

	return ui8Status;
}