//###########################################################################
//
// FILE:   f2838x_emif.c
//
// TITLE:  F2838x EMIF Initialization & Support Functions.
//
//###########################################################################
//
//
// $Copyright:
// Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com
//
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// modification, are permitted provided that the following conditions 
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// 
//   Redistributions of source code must retain the above copyright 
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// 
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//   notice, this list of conditions and the following disclaimer in the 
//   documentation and/or other materials provided with the   
//   distribution.
// 
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
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// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//###########################################################################

//
// Included Files
//
#include "f2838x_device.h"
#include "f2838x_examples.h"

//
// Emif1Initialize - This function initializes the EMIF1 to a known state.
//
void Emif1Initialize(void)
{
    EALLOW;
    //
    // Perform a Module soft reset on EMIF
    //
#ifdef CPU1
    DevCfgRegs.SOFTPRES1.all = 0x1;
   __asm (" nop");
    DevCfgRegs.SOFTPRES1.all = 0x0;
#endif
    EDIS;
}

//
// Emif2Initialize - This function initializes the EMIF2 to a known state.
//
void Emif2Initialize(void)
{
    EALLOW;
    //
    // Perform a Module soft reset on EMIF
    //
#ifdef CPU1
    DevCfgRegs.SOFTPRES1.all = 0x2;
   __asm (" nop");
    DevCfgRegs.SOFTPRES1.all = 0x0;
#endif
    EDIS;
}

//
// ASync_wait_config - Async wait configuration function
//
void ASync_wait_config(Uint16 inst, Uint16 wait_count, Uint16 wait_polarity)
{
    if (inst == 0)
    {
        //
        // 7:0 Maximum Extended Wait cycles.
        //
        Emif1Regs.ASYNC_WCCR.bit.MAX_EXT_WAIT = wait_count;

        //
        // 28 Wait Polarity for pad_wait_i[0].
        //
        Emif1Regs.ASYNC_WCCR.bit.WP0 = wait_polarity;
    }
#ifdef CPU1
    else
    {
        //
        // 7:0 Maximum Extended Wait cycles.
        //
        Emif2Regs.ASYNC_WCCR.bit.MAX_EXT_WAIT = wait_count;

        //
        // 28 Wait Polarity for pad_wait_i[0].
        //
        Emif2Regs.ASYNC_WCCR.bit.WP0 = wait_polarity;
    }
#endif
}

//
// ASync_cs2_config - Async CS2 Configuration
//
void ASync_cs2_config(Uint16 inst, Uint16 async_mem_data_width,
                      Uint16 turn_around_time, Uint16 r_hold_time,
                      Uint16 r_strobe_time, Uint16 r_setup, Uint16 w_hold,
                      Uint16 w_strobe, Uint16 w_setup, Uint16 extend_wait,
                      Uint16 strobe_sel)
{
    if (inst == 0)
    {
        //
        // 1:0 Asynchronous Memory Size.
        // 3:2 Turn Around cycles.
        // 6:4 Read Strobe Hold cycles.
        // 12:7 Read Strobe Duration cycles.
        // 16:13 Read Strobe Setup cycles.
        // 19:17 Write Strobe Hold cycles.
        // 25:20 Write Strobe Duration cycles.
        // 29:26 Write Strobe Setup cycles.
        // 30 Extend Wait mode.
        // 31 Select Strobe mode.
        //
        Emif1Regs.ASYNC_CS2_CR.bit.ASIZE = async_mem_data_width;
        Emif1Regs.ASYNC_CS2_CR.bit.TA= turn_around_time;
        Emif1Regs.ASYNC_CS2_CR.bit.R_HOLD= r_hold_time;
        Emif1Regs.ASYNC_CS2_CR.bit.R_STROBE = r_strobe_time;
        Emif1Regs.ASYNC_CS2_CR.bit.R_SETUP = r_setup;
        Emif1Regs.ASYNC_CS2_CR.bit.W_HOLD = w_hold;
        Emif1Regs.ASYNC_CS2_CR.bit.W_STROBE = w_strobe;
        Emif1Regs.ASYNC_CS2_CR.bit.W_SETUP  = w_setup;
        Emif1Regs.ASYNC_CS2_CR.bit.EW = extend_wait;
        Emif1Regs.ASYNC_CS2_CR.bit.SS = strobe_sel;
    }
#ifdef CPU1
    else
    {
        //
        // 1:0 Asynchronous Memory Size.
        // 3:2 Turn Around cycles.
        // 6:4 Read Strobe Hold cycles.
        // 12:7 Read Strobe Duration cycles.
        // 16:13 Read Strobe Setup cycles.
        // 19:17 Write Strobe Hold cycles.
        // 25:20 Write Strobe Duration cycles.
        // 29:26 Write Strobe Setup cycles.
        // 30 Extend Wait mode.
        // 31 Select Strobe mode.
        //
        Emif2Regs.ASYNC_CS2_CR.bit.ASIZE = async_mem_data_width;
        Emif2Regs.ASYNC_CS2_CR.bit.TA= turn_around_time;
        Emif2Regs.ASYNC_CS2_CR.bit.R_HOLD= r_hold_time;
        Emif2Regs.ASYNC_CS2_CR.bit.R_STROBE = r_strobe_time;
        Emif2Regs.ASYNC_CS2_CR.bit.R_SETUP = r_setup;
        Emif2Regs.ASYNC_CS2_CR.bit.W_HOLD = w_hold;
        Emif2Regs.ASYNC_CS2_CR.bit.W_STROBE = w_strobe;
        Emif2Regs.ASYNC_CS2_CR.bit.W_SETUP  = w_setup;
        Emif2Regs.ASYNC_CS2_CR.bit.EW = extend_wait;
        Emif2Regs.ASYNC_CS2_CR.bit.SS = strobe_sel;
    }
#endif
}

//
// ASync_cs3_config - Async CS3 Configuration
//
void ASync_cs3_config(Uint16 inst, Uint16 async_mem_data_width,
                      Uint16 turn_around_time, Uint16 r_hold_time,
                      Uint16 r_strobe_time, Uint16 r_setup, Uint16 w_hold,
                      Uint16 w_strobe, Uint16 w_setup, Uint16 extend_wait,
                      Uint16 strobe_sel)
{
    //
    // 1:0 Asynchronous Memory Size.
    // 3:2 Turn Around cycles.
    // 6:4 Read Strobe Hold cycles.
    // 12:7 Read Strobe Duration cycles.
    // 16:13 Read Strobe Setup cycles.
    // 19:17 Write Strobe Hold cycles.
    // 25:20 Write Strobe Duration cycles.
    // 29:26 Write Strobe Setup cycles.
    // 30 Extend Wait mode.
    // 31 Select Strobe mode.
    //
    Emif1Regs.ASYNC_CS3_CR.bit.ASIZE = async_mem_data_width;
    Emif1Regs.ASYNC_CS3_CR.bit.TA= turn_around_time;
    Emif1Regs.ASYNC_CS3_CR.bit.R_HOLD= r_hold_time;
    Emif1Regs.ASYNC_CS3_CR.bit.R_STROBE = r_strobe_time;
    Emif1Regs.ASYNC_CS3_CR.bit.R_SETUP = r_setup;
    Emif1Regs.ASYNC_CS3_CR.bit.W_HOLD = w_hold;
    Emif1Regs.ASYNC_CS3_CR.bit.W_STROBE = w_strobe;
    Emif1Regs.ASYNC_CS3_CR.bit.W_SETUP  = w_setup;
    Emif1Regs.ASYNC_CS3_CR.bit.EW = extend_wait;
    Emif1Regs.ASYNC_CS3_CR.bit.SS = strobe_sel;
}

//
// ASync_cs4_config - Async CS4 Configuration
//
void ASync_cs4_config(Uint16 inst, Uint16 async_mem_data_width,
                      Uint16 turn_around_time, Uint16 r_hold_time,
                      Uint16 r_strobe_time, Uint16 r_setup, Uint16 w_hold,
                      Uint16 w_strobe, Uint16 w_setup, Uint16 extend_wait,
                      Uint16 strobe_sel)
{
    //
    // 1:0 Asynchronous Memory Size.
    // 3:2 Turn Around cycles.
    // 6:4 Read Strobe Hold cycles.
    // 12:7 Read Strobe Duration cycles.
    // 16:13 Read Strobe Setup cycles.
    // 19:17 Write Strobe Hold cycles.
    // 25:20 Write Strobe Duration cycles.
    // 29:26 Write Strobe Setup cycles.
    // 30 Extend Wait mode.
    // 31 Select Strobe mode.
    //
    Emif1Regs.ASYNC_CS4_CR.bit.ASIZE = async_mem_data_width;
    Emif1Regs.ASYNC_CS4_CR.bit.TA= turn_around_time;
    Emif1Regs.ASYNC_CS4_CR.bit.R_HOLD= r_hold_time;
    Emif1Regs.ASYNC_CS4_CR.bit.R_STROBE = r_strobe_time;
    Emif1Regs.ASYNC_CS4_CR.bit.R_SETUP = r_setup;
    Emif1Regs.ASYNC_CS4_CR.bit.W_HOLD = w_hold;
    Emif1Regs.ASYNC_CS4_CR.bit.W_STROBE = w_strobe;
    Emif1Regs.ASYNC_CS4_CR.bit.W_SETUP  = w_setup;
    Emif1Regs.ASYNC_CS4_CR.bit.EW = extend_wait;
    Emif1Regs.ASYNC_CS4_CR.bit.SS = strobe_sel;
}

#ifdef CPU1
//
// setup_emif1_pinmux_async_16bit - function for EMIF1 GPIO pin setup
//
void setup_emif1_pinmux_async_16bit(Uint16 cpu_sel)
{
    Uint16 i;

    for (i=48; i<=52; i++)//38 to 52
    {
        if ((i != 42) && (i != 43))
        {
            GPIO_SetupPinMux(i,cpu_sel,2);//A0 - A12
        }
    }


    for (i=76; i<=82; i++) //69 to 82
    {
        {
            GPIO_SetupPinMux(i,cpu_sel,2);//D2 - D15
        }
    }

    for (i=86; i<=92; i++) //86 to 92
    {
        {
            GPIO_SetupPinMux(i,cpu_sel,2);//A13 - A19
        }
    }

    GPIO_SetupPinMux(55,cpu_sel,9);//D0
    GPIO_SetupPinMux(56,cpu_sel,9);//D1


    GPIO_SetupPinMux(26,cpu_sel,0);//RST
    GPIO_SetupPinMux(27,cpu_sel,0);//BYTE

    GpioCtrlRegs.GPADIR.bit.GPIO26 = 1;
    GpioDataRegs.GPADAT.bit.GPIO26 = 1;

    GpioCtrlRegs.GPADIR.bit.GPIO27 = 1;
    GpioDataRegs.GPADAT.bit.GPIO27 = 0;//Byte mode

    GPIO_SetupPinMux(29,cpu_sel,9);//CS3
    GPIO_SetupPinMux(31,cpu_sel,2);//WEN
    GPIO_SetupPinMux(36,cpu_sel,2);//WAIT
    GPIO_SetupPinMux(37,cpu_sel,2);//OEn

    //
    // setup async mode and enable pull-ups for Data pins
    //
    for (i=69; i<=92; i++)
    {
        if ((i != 84) && (i != 84) && (i != 85))
        {
            GPIO_SetupPinOptions(i,0,0x31); // GPIO_ASYNC||GPIO_PULLUP
        }
    }
}

//
// setup_emif1_pinmux_async_32bit - Setup pinmux for 32bit async
//
void setup_emif1_pinmux_async_32bit(Uint16 cpu_sel)
{
    Uint16 i;

    for (i=28; i<=87; i++)
    {
        if ((i != 42) && (i != 43) && (i != 84))
        {
            GPIO_SetupPinMux(i,cpu_sel,2);
        }
    }

    GPIO_SetupPinMux(88,cpu_sel,3);
    GPIO_SetupPinMux(89,cpu_sel,3);
    GPIO_SetupPinMux(90,cpu_sel,3);
    GPIO_SetupPinMux(91,cpu_sel,3);
    GPIO_SetupPinMux(92,cpu_sel,3);
    GPIO_SetupPinMux(93,cpu_sel,3);
    GPIO_SetupPinMux(94,cpu_sel,2);

    //
    // setup async mode for Data pins
    //
    for (i=53; i<=85; i++)
    {
        if (i != 84)
        {
            GPIO_SetupPinOptions(i,0,0x31);
        }
    }
}

//
// setup_emif2_pinmux_async_16bit - function for EMIF2 GPIO pin setup
//
void setup_emif2_pinmux_async_16bit(Uint16 cpu_sel)
{
    Uint16 i;

    for (i=96; i<=121; i++)
    {
        GPIO_SetupPinMux(i,cpu_sel,3);
    }

    for (i=53; i<=68; i++)
    {
        GPIO_SetupPinMux(i,cpu_sel,3);
    }

    //
    // setup async mode for Data pins
    //
    for (i=53; i<=68; i++)
    {
        GPIO_SetupPinOptions(i,0,0x31);
    }
}

//
// setup_emif1_pinmux_sdram_16bit - Setup pinmux for 16bit SDRAM
//
void setup_emif1_pinmux_sdram_16bit(Uint16 cpu_sel)
{
    int i;

    for (i=29; i<=52; i++)
    {
        if ((i != 42) && (i != 43))
        {
            GPIO_SetupPinMux(i,cpu_sel,2);
        }
    }

    for (i=69; i<=85; i++)
    {
        if (i != 84)
        {
            GPIO_SetupPinMux(i,cpu_sel,2);
        }
    }

    for(i=86; i<=93; i++)
    {
       GPIO_SetupPinMux(i,cpu_sel,3);
    }

    //
    //configure Data pins for Async mode
    //
    for (i = 69; i <= 85; i++)
    {
        if (i != 84)
        {
            GPIO_SetupPinOptions(i,0,0x31);
        }
    }

    GPIO_SetupPinOptions(88,0,0x31);
    GPIO_SetupPinOptions(89,0,0x31);
    GPIO_SetupPinOptions(90,0,0x31);
    GPIO_SetupPinOptions(91,0,0x31);
}

//
// setup_emif2_pinmux_sdram_16bit - Setup pinmux for 16bit SDRAM
//
void setup_emif2_pinmux_sdram_16bit(Uint16 cpu_sel)
{
    int i;

    for (i=53; i<=68; i++)
    {
        GPIO_SetupPinMux(i,cpu_sel,3);
    }
    for (i=96; i<=121; i++)
    {
        GPIO_SetupPinMux(i,cpu_sel,3);
    }

    //
    //configure Data pins for Async mode
    //
    for (i = 53; i <= 68; i++)
    {
        GPIO_SetupPinOptions(i,0,0x31);
    }
}

//
// setup_emif1_pinmux_sdram_32bit - Setup pinmux for 32bit SDRAM
//
void setup_emif1_pinmux_sdram_32bit(Uint16 cpu_sel)
{
    int i;

    for (i=28; i<=85; i++)
    {
        if ((i != 42) && (i != 43) && (i != 84))
        {
            GPIO_SetupPinMux(i,cpu_sel,2);
        }
    }

    for(i=86; i<=93; i++)
    {
        GPIO_SetupPinMux(i,cpu_sel,3);
    }

    GPIO_SetupPinMux(94,cpu_sel,2);

    //
    //configure Data pins for Async mode
    //
    for (i = 53; i <= 85; i++)
    {
        if (i != 84)
        {
            GPIO_SetupPinOptions(i,0,0x31);
        }
    }

    GPIO_SetupPinOptions(88,0,0x31);
    GPIO_SetupPinOptions(89,0,0x31);
    GPIO_SetupPinOptions(90,0,0x31);
    GPIO_SetupPinOptions(91,0,0x31);
 }

#endif // CPU1

//
// End of file
//