TM4C1294 CRC completion interrupt on Software DMA channel does not appear

//*****************************************************************************
//
// sdram.c - Example demonstrating how to configure the EPI bus in SDRAM
//           mode.
//
// Copyright (c) 2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
//
//   Redistribution and use in source and binary forms, with or without
//   modification, are permitted provided that the following conditions
//   are met:
//
//   Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
//   Redistributions in binary form must reproduce the above copyright
//   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
//   from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.
//
//*****************************************************************************

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_uart.h"
#include "inc/hw_flash.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "driverlib/uart.h"
#include "driverlib/udma.h"
#include "utils/uartstdio.h"

//*****************************************************************************
//
// The control table used by the uDMA controller.  This table must be aligned
// to a 1024 byte boundary.
//
//*****************************************************************************
#if defined(ewarm)
#pragma data_alignment=1024
uint8_t pui8ControlTable[1024];
#elif defined(ccs)
#pragma DATA_ALIGN(pui8ControlTable, 1024)
uint8_t pui8ControlTable[1024];
#else
uint8_t pui8ControlTable[1024] __attribute__ ((aligned(1024)));
#endif

//*****************************************************************************
//
// A global variable to indicate that the UDMA operation is complete.
//
//*****************************************************************************
volatile bool g_bEPITransferComplete;
volatile uint32_t g_ui32SysClock;

const uint8_t g_pc[34] = "This is a string of 34 characters";

void
UDMAErrorIntHandler(void)
{
	uDMAErrorStatusClear();
}

void
UART0IntHandler(void)
{

	UARTDMADisable(UART0_BASE, UART_DMA_TX);
    UARTIntClear(UART0_BASE, UART_INT_DMATX);

}
//*****************************************************************************
//
// This function sets up UART0 to be used for a console to display information
// as the example is running.
//
//*****************************************************************************
void
InitConsole(void)
{
    //
    // Enable GPIO port A which is used for UART0 pins.
    // TODO: change this to whichever GPIO port you are using.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    //
    // Configure the pin muxing for UART0 functions on port A0 and A1.
    // This step is not necessary if your part does not support pin muxing.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinConfigure(GPIO_PA0_U0RX);
    GPIOPinConfigure(GPIO_PA1_U0TX);

    //
    // Enable UART0 so that we can configure the clock.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    //
    // Use the internal 16MHz oscillator as the UART clock source.
    //
    UARTClockSourceSet(UART0_BASE, UART_CLOCK_SYSTEM);

    //
    // Select the alternate (UART) function for these pins.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Initialize the UART for console I/O.
    //
    UARTStdioConfig(0, 115200, g_ui32SysClock);

    //
    // Enable the UART Interrupts
    //
    UARTIntEnable(UART0_BASE, UART_INT_DMATX);
    IntEnable(INT_UART0);
}

//*****************************************************************************
//
// Configure EPI0 in SDRAM mode.  The EPI memory space is setup using an a
// simple C array.  This example shows how to read and write to an SDRAM using
// the EPI bus in SDRAM mode and uDMA to transfer the data.
//
//*****************************************************************************
int
main(void)
{
    //
    // Set the clocking to run at 120MHz from the PLL.
    // TODO: Update this call to set the system clock frequency your
    // application requires.
    //
    g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_OSC_INT | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
                                      SYSCTL_CFG_VCO_480), 120000000);

    //
    // Set up the serial console to use for displaying messages.  This is
    // just for this example program and is not needed for EPI operation.
    //
    InitConsole();

    //
    // Set up Flash Access for DMA
    //
    HWREG(FLASH_PP) |= FLASH_PP_DFA;
    HWREG(FLASH_DMASZ) = 0x4000;
    HWREG(FLASH_DMAST) = 0x0;

    //
    // Now Configure the UDMA Controller to read data from SDRAM
    // NBRFIFO and then transfer it to the Write Buffer
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
    SysCtlPeripheralSleepEnable(SYSCTL_PERIPH_UDMA);

    //
    // Enable the uDMA controller error interrupt.  This interrupt will occur
    // if there is a bus error during a transfer.
    //
    IntEnable(INT_UDMAERR);

    //
    // Enable the uDMA controller.
    //
    uDMAEnable();

    //
    // Point at the control table to use for channel control structures.
    //
    uDMAControlBaseSet(pui8ControlTable);

    //
    // Assign the UDMA Channel for EPI RX DMA Request
    //
    uDMAChannelAssign(UDMA_CH9_UART0TX);

    //
    // Configure the USE BURST Feature for the channel
    //
    uDMAChannelAttributeEnable(UDMA_CH9_UART0TX, UDMA_ATTR_USEBURST);

    //
    // Configure the control parameters for the EPI RX.  The uDMA EPI RX
    // channel is used to transfer a block of data from the NBRFIFO to a buffer
    // in SDRAM. The data size is 32 bits.  The source address is not
    // incremented as it is coming from a FIFO. The destination increment is
    // incremented by 32 bits as it is SDRAM address space.  The
    // arbitration size is set to 8, which matches the EPI RDFIFO threshold
    //
    uDMAChannelControlSet(UDMA_CH9_UART0TX | UDMA_PRI_SELECT,
                              UDMA_SIZE_8 | UDMA_SRC_INC_8 |
                              UDMA_DST_INC_NONE |
                              UDMA_ARB_1);


    uDMAChannelTransferSet(UDMA_CH9_UART0TX | UDMA_PRI_SELECT,
                               UDMA_MODE_BASIC,
							   (void *)(&g_pc[0]),
							   (void *)(UART0_BASE + UART_O_DR),
                               sizeof(g_pc));

    //
    // Now the uDMA EPI RX channel is primed to start a transfer. As soon as
    // the EPIRPSTD0 register is written with a count value, it will read the
    // SDRAM and put the data in the read FIFO. When threshold has been reached
    // the EPI shall generate a DMA Request to read.
    //
    uDMAChannelEnable(UDMA_CH9_UART0TX);

	UARTDMAEnable(UART0_BASE, UART_DMA_TX);

    //
    // Wait in while loop at the end...
    //
    while(1)
    {
    }
}

//*****************************************************************************
//
// sdram.c - Example demonstrating how to configure the EPI bus in SDRAM
//           mode.
//
// Copyright (c) 2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
//
//   Redistribution and use in source and binary forms, with or without
//   modification, are permitted provided that the following conditions
//   are met:
//
//   Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
//   Redistributions in binary form must reproduce the above copyright
//   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
//   from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.
//
//*****************************************************************************

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ssi.h"
#include "inc/hw_flash.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "driverlib/ssi.h"
#include "driverlib/udma.h"
#include "utils/uartstdio.h"

//*****************************************************************************
//
// The control table used by the uDMA controller.  This table must be aligned
// to a 1024 byte boundary.
//
//*****************************************************************************
#if defined(ewarm)
#pragma data_alignment=1024
uint8_t pui8ControlTable[1024];
#elif defined(ccs)
#pragma DATA_ALIGN(pui8ControlTable, 1024)
uint8_t pui8ControlTable[1024];
#else
uint8_t pui8ControlTable[1024] __attribute__ ((aligned(1024)));
#endif

//*****************************************************************************
//
// A global variable to indicate that the UDMA operation is complete.
//
//*****************************************************************************
volatile bool g_bEPITransferComplete;
volatile uint32_t g_ui32SysClock=16000000;

const uint8_t g_pc[16] = "ABCD1234EFEF5678";

void
UDMAErrorIntHandler(void)
{
	while(1);
}

void
SSI1IntHandler(void)
{

	SSIDMADisable(SSI1_BASE, SSI_DMA_TX);
    SSIIntClear(SSI1_BASE, SSI_DMATX);

}
//*****************************************************************************
//
// This function sets up UART0 to be used for a console to display information
// as the example is running.
//
//*****************************************************************************
void
InitConsole(void)
{
    //
    // Enable GPIO port A which is used for UART0 pins.
    // TODO: change this to whichever GPIO port you are using.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);

    //
    // Enable UART0 so that we can configure the clock.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI1);

    //
    // Configure the pin muxing for UART0 functions on port A0 and A1.
    // This step is not necessary if your part does not support pin muxing.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinConfigure(GPIO_PB5_SSI1CLK);
    GPIOPinConfigure(GPIO_PB4_SSI1FSS);
    GPIOPinConfigure(GPIO_PE4_SSI1XDAT0);
    GPIOPinConfigure(GPIO_PE5_SSI1XDAT1);

    GPIOPinTypeSSI(GPIO_PORTB_BASE, GPIO_PIN_4 | GPIO_PIN_5);
    GPIOPinTypeSSI(GPIO_PORTE_BASE, GPIO_PIN_4 | GPIO_PIN_5);

    SSIConfigSetExpClk(SSI1_BASE, g_ui32SysClock, SSI_FRF_MOTO_MODE_0,
    		SSI_MODE_MASTER, 3750000, 8);

    SSIEnable(SSI1_BASE);

    //
    // Enable the UART Interrupts
    //
    SSIIntEnable(SSI1_BASE, SSI_DMATX);
    IntEnable(INT_SSI1);
}

//*****************************************************************************
//
// Configure EPI0 in SDRAM mode.  The EPI memory space is setup using an a
// simple C array.  This example shows how to read and write to an SDRAM using
// the EPI bus in SDRAM mode and uDMA to transfer the data.
//
//*****************************************************************************
int
main(void)
{
	uint32_t ui32DummyByte;
    //
    // Set the clocking to run at 120MHz from the PLL.
    // TODO: Update this call to set the system clock frequency your
    // application requires.
    //
    //g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_OSC_INT | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
    //                                  SYSCTL_CFG_VCO_480), 120000000);

    //
    // Set up the serial console to use for displaying messages.  This is
    // just for this example program and is not needed for EPI operation.
    //
    InitConsole();

    //
    // Set up Flash Access for DMA
    //
    HWREG(FLASH_PP) |= FLASH_PP_DFA;
    HWREG(FLASH_DMASZ) = 0x4000;
    HWREG(FLASH_DMAST) = 0x0;

    //
    // Now Configure the UDMA Controller to read data from SDRAM
    // NBRFIFO and then transfer it to the Write Buffer
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);

    //
    // Enable the uDMA controller error interrupt.  This interrupt will occur
    // if there is a bus error during a transfer.
    //
    IntEnable(INT_UDMAERR);

    //
    // Enable the uDMA controller.
    //
    uDMAEnable();

    //
    // Point at the control table to use for channel control structures.
    //
    uDMAControlBaseSet(pui8ControlTable);

    //
    // Assign the UDMA Channel for EPI RX DMA Request
    //
    uDMAChannelAssign(UDMA_CH11_SSI1TX);

    //
    // Configure the USE BURST Feature for the channel
    //
    uDMAChannelAttributeEnable(UDMA_CH11_SSI1TX, UDMA_ATTR_USEBURST);

    //
    // Configure the control parameters for the EPI RX.  The uDMA EPI RX
    // channel is used to transfer a block of data from the NBRFIFO to a buffer
    // in SDRAM. The data size is 32 bits.  The source address is not
    // incremented as it is coming from a FIFO. The destination increment is
    // incremented by 32 bits as it is SDRAM address space.  The
    // arbitration size is set to 8, which matches the EPI RDFIFO threshold
    //
    uDMAChannelControlSet(UDMA_CH11_SSI1TX | UDMA_PRI_SELECT,
                              UDMA_SIZE_8 | UDMA_SRC_INC_8 |
                              UDMA_DST_INC_NONE |
                              UDMA_ARB_8);


    uDMAChannelTransferSet(UDMA_CH11_SSI1TX | UDMA_PRI_SELECT,
                               UDMA_MODE_BASIC,
							   (void *)(&g_pc[0]),
							   (void *)(SSI1_BASE + SSI_O_DR),
                               sizeof(g_pc));

    //
    // Now the uDMA EPI RX channel is primed to start a transfer. As soon as
    // the EPIRPSTD0 register is written with a count value, it will read the
    // SDRAM and put the data in the read FIFO. When threshold has been reached
    // the EPI shall generate a DMA Request to read.
    //
    uDMAChannelEnable(UDMA_CH11_SSI1TX);

	SSIDMAEnable(SSI1_BASE, SSI_DMA_TX);

    //
    // Wait in while loop at the end...
    //
    while(1)
    {
    	SSIDataGet(SSI1_BASE,&ui32DummyByte);
    }
}