i.MX6 ESPI slave mode support patch based on rel_imx_3.0.35_4.1.0

Document created by PengFushi Employee on Oct 12, 2013
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This patch is for i.MX6 ESPI controller slave mode (SPI timing mode 0 and 3) support.

 

Hardware prepare:

  Connect two i.MX6 Sabresd boards, remove U14 SPI nor device, connect two boards like:

         MISO --- MISO

         MOSI --- MOSI

         SS     --- SS

         CLK   --- CLK

         GND  ---  GND

 

Software prepare:

1>Apply patch spi_slave_2013_10_12.patch on 3.0.35_4.1.0 Linux BSP release.

    Note two board all need choose CONFIG_IMX6_SDP_MISCSPI, CONFIG_SPI_SPIDEV of kernel

Symbol: IMX6_SDP_MISCSPI [=y]                                                                                                             

Location:

  |     -> Device Drivers                                                                                                                   

  |       -> Misc devices (MISC_DEVICES [=y])

Symbol: SPI_SPIDEV [=y] 

Location:                                                                                                                                         

  |     -> Device Drivers                        

  |       -> SPI support (SPI [=y])

 

   Spi master board choose CONFIG_SPI_IMX_VER_2_3

Symbol: SPI_IMX_VER_2_3 [=y]

Location:                                                                                                                                        

  |     -> Device Drivers                                                                                                                              

  |       -> SPI support (SPI [=y])                                                                                                                    

  |         -> Choose IMX SPI work mode (<choice> [=y])

 

   Spi slave board choose CONFIG_SPI_IMX_VER_2_3_SLAVE.

Symbol: SPI_IMX_VER_2_3_SLAVE [=y]

Location:                                                                                                                                        

  |     -> Device Drivers                                                                                                                              

  |       -> SPI support (SPI [=y])                                                                                                                    

  |         -> Choose IMX SPI work mode (<choice> [=y])

 

2>Compile test application  mxc_spi_test1.c to generate mxc_spi_test.

 

3> Test steps :

  1. First  spi slave board input cmd mxc-spi-test –D 0 –b 32 –L 32
  2. Then spi master board input cmd mxc-spi-test –D 0 –b 32 –L 32

          This tool will write its buffer ( the content is same in two side ) to the  other board  through  SPI bus , then read data from the other board , and compare with its write buffer.

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