怎么将DSPI外设配置为SPI从器件

这是我的第一个SPC560实现，我很难解读参考手册试图告诉我的PSMI寄存器中padsEL字段的内容。例如，让我们说
我想将DSPI外设配置为SPI从器件，准确地说是DSPI0。我阅读数据表的方式。我需要按如下方式配置PCR寄存器：

对于SIN：PCR [12] = 0x0104
对于SOUT：PCR [13] = 0x0407
对于SCK：PCR [14] = 0x0504
对于CS0：PCR [15] = 0x0504

我的问题是关于输入（SIN，SCK和CS0）。后两个是输入，因为我想成为一个SPI从属。我相信我不需要为SIN输入做更多的事情，因为它没有与其他输入复用。根据参考手册和数据手册，我需要在PSMI寄存器中设置适当的PADSEL位，以“通过适当的PSMI字段指定要使用的焊盘”。这就是我感到困惑的地方。我无法弄清楚我需要在PADSEL字段中添加什么值。在我看来，我需要将PADSEL5和PADSEL6设置为选择正确的输入 - 但是什么？我假设基于PADSEL字段的数量（32），每个位对应一个PAD，但哪些位对应于哪个PADS？


感谢您的任何见解......



以下为原文




This is my first SPC560 implementation and I'm having a hard time deciphering what the Reference Manual is trying to tell me with respect to PADSEL fields in the PSMI registers.  For example, lets say
I want to configure the DSPI peripheral to act as a SPI slave, DSPI0 to be exact.  The way I read the data sheet. I need to configure the PCR registers as follows:

  For SIN: PCR[12]= 0x0104
  For SOUT: PCR[13]= 0x0407
  For SCK: PCR[14]= 0x0504
  For CS0: PCR[15]= 0x0504

My question is with respect to the inputs (SIN, SCK, and CS0).  The latter 2 are inputs because I want to be a SPI slave. I believe I do not have to do anything more for the SIN input because that is not muxed with other inputs.  According to the reference manual and data sheet, I need to set the appropriate PADSEL bits in the PSMI registers to 'specify the pad to be used via the appropriate PSMI field'. That's where I get confused.  I can't quite figure out what value I need to put in the PADSEL fields.  It looks to me like I need to set PADSEL5 and PADSEL6 to something to select the proper input- but what? I'm assuming based on the number of PADSEL fields (32), that each bit corresponds to a PAD, but which bits correspond to which PADS?


Thanks for any insight.....