Configure McBSP in McBSP_SlaveExample project of OMAP L138 LCDK

Dear All,

I've been trying to configure the McBSP of our OMAP L138 LCDK by using the  McBSP_SlaveExample which is available on the following directory:

ti\pdk_OMAPL138_1_01_00_02\packages\ti\drv\exampleProjects\MCBSP_SlaveExampleProject

The example runs without any problem, however, I have the following questions:

1. Is there any tutorial, beside the McBSP user manual which explains the functions used in this example? 

2. The following is a function called in the "MCBSP_SlaveExampleProject_main.c" file. Do I need to manually change these pinmux configurations? If yes, how should I do it?

void configureMcbsp(void)
{
    CSL_SyscfgRegsOvly syscfgRegs = (CSL_SyscfgRegsOvly)CSL_SYSCFG_0_REGS;

    syscfgRegs->PINMUX1 &= ~(CSL_SYSCFG_PINMUX1_PINMUX1_7_4_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_11_8_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_15_12_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_19_16_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_23_20_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_27_24_MASK |
                             CSL_SYSCFG_PINMUX1_PINMUX1_31_28_MASK);

    syscfgRegs->PINMUX1 = 0x22222220;
}