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MSP430FR5xxx信息块中的CRC

[英]MSP430FR5xxx CRC in info block

原文 2017-02-03 18:25:17 7 1 microcontroller/ msp430/ texas-instruments

What is the "CRC value" in the info block of MSP430FR5959 (address 01A02h)? MSP430FR5959的信息块（地址01A02h）中的“ CRC值”是什么？

All specs just say "CRC value" and "per unit". 所有规格都只说“ CRC值”和“每单位”。 But what is the actual data being checksummed? 但是校验和的实际数据是什么？ Device ID? 设备ID？ Firmware? 固件？ Something else? 还有吗

1 个解决方案

This User's Guide (SLAU367M) has some clues in section 1.14. 本用户指南（SLAU367M）在1.14节中有一些提示。 Table 6-62 in the datasheet says that the CRC length value is 6, which is the same as the Info length value. 表6-62中数据表表示，CRC长度值是6，它是一样的信息长度值。 And the User's Guide section 1.14.1 explains that Info Length value of 6 means 2^6 = 64 32-bit words or 256 bytes. 并且《用户指南》第1.14.1节解释说，“信息长度”值为6表示2 ^ 6 = 64个32位字或256个字节。 So I suspect the CRC length is also 256 bytes. 因此，我怀疑CRC长度也是256个字节。 And I interpret section 1.14.2 to say that Info length (and presumably CRC length) start from address 0x1A08. 我在1.14.2节中解释说，信息长度（大概是CRC长度）从地址0x1A08开始。 So my guess is that the CRC value is calculated over the 256 bytes starting at address 0x1A08. 所以我的猜测是，CRC值是从地址0x1A08开始的256个字节中计算的。