void i2c_0_init()
{
//enable I2C module 0
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
//reset module
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_I2C0);
//enable GPIO peripheral that contains I2C 0
// SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
// Configure the pin muxing for I2C0 functions on port B2 and B3.
ROM_GPIOPinConfigure(GPIO_PIN_2);
ROM_GPIOPinConfigure(GPIO_PIN_3);
// Select the I2C function for these pins.
GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);
// Enable and initialize the I2C0 master module. Use the system clock for
// the I2C0 module. The last parameter sets the I2C data transfer rate.
// If false the data rate is set to 100kbps and if true the data rate will
// be set to 400kbps.
ROM_I2CMasterInitExpClk(I2C0_BASE, SysCtlClockGet(), true);
//clear I2C FIFOs
// HWREG(I2C0_BASE + I2C_O_FIFOCTL) = 80008000;
}
void initialize_network_hardware() {
initDMA();
EthernetIntRegister(ETH_BASE, EthernetISR);
/* Enable/Reset the Ethernet Controller */
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ETH);
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_ETH);
ROM_EthernetIntDisable(ETH_BASE,
(ETH_INT_PHY | ETH_INT_MDIO | ETH_INT_RXER | ETH_INT_RXOF | ETH_INT_TX | ETH_INT_TXER | ETH_INT_RX));
/* Clear any interrupts that were already pending. */
unsigned long temp = ROM_EthernetIntStatus(ETH_BASE, 0);
ROM_EthernetIntClear(ETH_BASE, temp);
/* Initialise the MAC and connect. */
EthernetInit(ETH_BASE);
ROM_EthernetConfigSet(ETH_BASE, (ETH_CFG_TX_DPLXEN | ETH_CFG_TX_CRCEN | ETH_CFG_TX_PADEN | ETH_CFG_RX_AMULEN));
setMACAddress();
ROM_EthernetEnable(ETH_BASE);
ROM_IntEnable(INT_ETH);
ROM_EthernetIntEnable(ETH_BASE, ETH_INT_RX);
}
void TwoWire::forceStop(void) {
//force a stop to release the bus
ROM_GPIOPinTypeGPIOOutput(g_uli2cBase[i2cModule],
g_uli2cSCLPins[i2cModule] | g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule], g_uli2cSDAPins[i2cModule], 0);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule],
g_uli2cSCLPins[i2cModule], g_uli2cSCLPins[i2cModule]);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule],
g_uli2cSDAPins[i2cModule], g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinTypeI2C(g_uli2cBase[i2cModule], g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinTypeI2CSCL(g_uli2cBase[i2cModule], g_uli2cSCLPins[i2cModule]);
//reset I2C controller
//without resetting the I2C controller, the I2C module will
//bring the bus back to it's erroneous state
ROM_SysCtlPeripheralReset(g_uli2cPeriph[i2cModule]);
while(!ROM_SysCtlPeripheralReady(g_uli2cPeriph[i2cModule]));
ROM_I2CMasterInitExpClk(MASTER_BASE, F_CPU, speedMode);//Bus speed
if(speedMode==I2C_SPEED_FASTMODE_PLUS)//Force 1Mhz
{
uint32_t ui32TPR = ((F_CPU + (2 * 10 * 1000000l) - 1) / (2 * 10 * 1000000l)) - 1;
HWREG(MASTER_BASE + I2C_O_MTPR) = ui32TPR;
}
}
int wolfSSL_TI_CCMInit(void)
{
if (ccm_init)
return true;
ccm_init = true;
#ifndef TI_DUMMY_BUILD
SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
if (!ROM_SysCtlPeripheralPresent(SYSCTL_PERIPH_CCM0))
return false;
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_CCM0);
WAIT(ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0));
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_CCM0);
WAIT(ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0));
#ifndef SINGLE_THREADED
if (wc_InitMutex(&TI_CCM_Mutex))
return false;
#endif
#endif /* !TI_DUMMY_BUILD */
return true;
}
// * svm_init *****************************************************************
// * setup pins and PWM hardware to talk to servomotors *
// * Assumes system clock already configured *
// ****************************************************************************
void svm_init(void)
{
ROM_SysCtlPeripheralEnable(SVM_OUTPUT_PORT); // enable clock to GPIO port
ROM_SysCtlPeripheralReset(SVM_OUTPUT_PORT); // reset to clear any previous config
// configure output pads
GPIOPinTypeGPIOOutput(SVM_OUTPUT_PORT_BASE, SVM_OUTPUT_PINS);
// configure PWM
ROM_SysCtlPeripheralEnable(SVM_PWM_MODULE); // enable clock to pwm module
ROM_SysCtlPWMClockSet(SVM_PWM_FPWM_DIV); // configure clock divider to derive Fpwm from Fsys
// wrap 16b PWM counter at 1041 for 3kHz pwm output
ROM_PWMDeadBandDisable(SVM_PWM_BASE, SVM_PWM_GEN); // allow PWM0, PWM1 to behave independently
ROM_PWMGenConfigure(SVM_PWM_BASE, SVM_PWM_GEN, // configure pwm generator
PWM_GEN_MODE_DOWN | // up/down count for center timed PWM
PWM_GEN_MODE_NO_SYNC); // outputs from generator behave independently
ROM_PWMGenPeriodSet(SVM_PWM_BASE, SVM_PWM_GEN, // sets period for generator to appropriate period
SVM_PWM_PERIOD_TICKS);
ROM_PWMPulseWidthSet(SVM_PWM_BASE, SVM_1_PWM, 0); // set initial pulse widths to 0 for safety
ROM_PWMPulseWidthSet(SVM_PWM_BASE, SVM_2_PWM, 0); // set initial pulse widths to 0 for safety
ROM_GPIOPinConfigure(SVM_1_PWM_MUX); // select mux for pwm output hbridge 1
ROM_GPIOPinConfigure(SVM_2_PWM_MUX); // select mux for pwm output hbridge 2
ROM_GPIOPinTypePWM(SVM_OUTPUT_PORT_BASE, SVM_1_PWM_PIN);// do some other step configuring pwm...
ROM_GPIOPinTypePWM(SVM_OUTPUT_PORT_BASE, SVM_2_PWM_PIN);// ...exact function is unknown
ROM_PWMOutputState(SVM_PWM_BASE, SVM_1_PWM_BIT | SVM_2_PWM_BIT, true);
// enable outputs from pwm generator to pins
ROM_PWMGenEnable(SVM_PWM_BASE, SVM_PWM_GEN); // enable pwm output generator
}
//*****************************************************************************
//
// Initialize the ADC inputs used by the game pad device. This example uses
// the ADC pins on Port E pins 1, 2, and 3(AIN0-2).
//
//*****************************************************************************
void
ADCInit(void)
{
int32_t ui32Chan;
//
// Enable the GPIOs and the ADC used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOE);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_ADC0);
//
// Select the external reference for greatest accuracy.
//
ROM_ADCReferenceSet(ADC0_BASE, ADC_REF_EXT_3V);
//
// Configure the pins which are used as analog inputs.
//
ROM_GPIOPinTypeADC(GPIO_PORTE_AHB_BASE, GPIO_PIN_3 | GPIO_PIN_2 |
GPIO_PIN_1);
//
// Configure the sequencer for 3 steps.
//
for(ui32Chan = 0; ui32Chan < 2; ui32Chan++)
{
//
// Configure the sequence step
//
ROM_ADCSequenceStepConfigure(ADC0_BASE, 0, ui32Chan, ui32Chan);
}
ROM_ADCSequenceStepConfigure(ADC0_BASE, 0, 2, ADC_CTL_CH2 | ADC_CTL_IE |
ADC_CTL_END);
//
// Enable the sequence but do not start it yet.
//
ROM_ADCSequenceEnable(ADC0_BASE, 0);
}
void TwoWire::forceStop(void) {
//force a stop to release the bus
ROM_GPIOPinTypeGPIOOutput(g_uli2cBase[i2cModule],
g_uli2cSCLPins[i2cModule] | g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule], g_uli2cSDAPins[i2cModule], 0);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule],
g_uli2cSCLPins[i2cModule], g_uli2cSCLPins[i2cModule]);
ROM_GPIOPinWrite(g_uli2cBase[i2cModule],
g_uli2cSDAPins[i2cModule], g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinTypeI2C(g_uli2cBase[i2cModule], g_uli2cSDAPins[i2cModule]);
ROM_GPIOPinTypeI2CSCL(g_uli2cBase[i2cModule], g_uli2cSCLPins[i2cModule]);
//reset I2C controller
//without resetting the I2C controller, the I2C module will
//bring the bus back to it's erroneous state
ROM_SysCtlPeripheralReset(g_uli2cPeriph[i2cModule]);
while(!ROM_SysCtlPeripheralReady(g_uli2cPeriph[i2cModule]));
ROM_I2CMasterInitExpClk(MASTER_BASE, F_CPU, false);
}
static void tm4c123_i2c_reset(void)
{
uint32_t speed, tpr;
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_I2C3);
/*
* speed = SystemCoreClock / (20 * (1 + TPR))
* TPR = (SystemCoreClock / (20 * speed)) - 1;
*/
speed = 400000;
tpr = (SystemCoreClock / (20 * speed)) - 1;
/* Enable I2C3 */
I2C3->MCR = I2C_MCR_MFE;
I2C3->MTPR = tpr;
I2C3->MIMR = I2C_MIMR_IM;
I2C3->MICR = (I2C_MICR_CLKIC | I2C_MICR_IC);
}
//*****************************************************************************
//
// Initialize the AES and CCM modules.
//
//*****************************************************************************
bool
AESInit(void)
{
uint32_t ui32Loop;
//
// Check that the CCM peripheral is present.
//
if(!ROM_SysCtlPeripheralPresent(SYSCTL_PERIPH_CCM0))
{
UARTprintf("No CCM peripheral found!\n");
//
// Return failure.
//
return(false);
}
//
// The hardware is available, enable it.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_CCM0);
//
// Wait for the peripheral to be ready.
//
ui32Loop = 0;
while(!ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0))
{
//
// Increment our poll counter.
//
ui32Loop++;
if(ui32Loop > CCM_LOOP_TIMEOUT)
{
//
// Timed out, notify and spin.
//
UARTprintf("Time out on CCM ready after enable.\n");
//
// Return failure.
//
return(false);
}
}
//
// Reset the peripheral to ensure we are starting from a known condition.
//
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_CCM0);
//
// Wait for the peripheral to be ready again.
//
ui32Loop = 0;
while(!ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0))
{
//
// Increment our poll counter.
//
ui32Loop++;
if(ui32Loop > CCM_LOOP_TIMEOUT)
{
//
// Timed out, spin.
//
UARTprintf("Time out on CCM ready after reset.\n");
//
// Return failure.
//
return(false);
}
}
//
// Return initialization success.
//
return(true);
}
//*****************************************************************************
//
// This is the main application entry function.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32TxCount;
uint32_t ui32RxCount;
//uint32_t ui32Loop;
//
// Enable lazy stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
ROM_FPULazyStackingEnable();
//
// Set the clocking to run from the PLL at 50MHz
//
#if 1
ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_16MHZ);
//
// Configure the required pins for USB operation.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_4);
//ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
/* This code taken from: http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/311237.aspx
*/
#else
#include "hw_nvic.h"
FlashErase(0x00000000);
ROM_IntMasterDisable();
ROM_SysTickIntDisable();
ROM_SysTickDisable();
uint32_t ui32SysClock;
ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
ui32SysClock = ROM_SysCtlClockGet();
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5);
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / 100);
HWREG(NVIC_DIS0) = 0xffffffff;
HWREG(NVIC_DIS1) = 0xffffffff;
HWREG(NVIC_DIS2) = 0xffffffff;
HWREG(NVIC_DIS3) = 0xffffffff;
HWREG(NVIC_DIS4) = 0xffffffff;
int ui32Addr;
for(ui32Addr = NVIC_PRI0; ui32Addr <= NVIC_PRI34; ui32Addr+=4)
{
HWREG(ui32Addr) = 0;
}
HWREG(NVIC_SYS_PRI1) = 0;
HWREG(NVIC_SYS_PRI2) = 0;
HWREG(NVIC_SYS_PRI3) = 0;
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_USB0);
ROM_SysCtlUSBPLLEnable();
ROM_SysCtlDelay(ui32SysClock*2 / 3);
ROM_IntMasterEnable();
ROM_UpdateUSB(0);
while(1)
{
}
#endif
#define BOOTLOADER_TEST 0
#if BOOTLOADER_TEST
#include "hw_nvic.h"
//ROM_UpdateUART();
// May need to do the following here:
// 0. See if this will cause bootloader to start
//ROM_FlashErase(0);
//ROM_UpdateUSB(0);
#define SYSTICKS_PER_SECOND 100
uint32_t ui32SysClock = ROM_SysCtlClockGet();
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
ROM_SysTickIntEnable();
ROM_SysTickEnable();
//USBDCDTerm(0);
// Disable all interrupts
ROM_IntMasterDisable();
ROM_SysTickIntDisable();
ROM_SysTickDisable();
HWREG(NVIC_DIS0) = 0xffffffff;
HWREG(NVIC_DIS1) = 0xffffffff;
HWREG(NVIC_DIS2) = 0xffffffff;
HWREG(NVIC_DIS3) = 0xffffffff;
HWREG(NVIC_DIS4) = 0xffffffff;
int ui32Addr;
for(ui32Addr = NVIC_PRI0; ui32Addr <= NVIC_PRI34; ui32Addr+=4)
{
HWREG(ui32Addr) = 0;
}
HWREG(NVIC_SYS_PRI1) = 0;
HWREG(NVIC_SYS_PRI2) = 0;
HWREG(NVIC_SYS_PRI3) = 0;
// 1. Enable USB PLL
//ROM_SysCtlUSBPLLEnable();
// 2. Enable USB controller
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_USB0);
//USBClockEnable(USB0_BASE, 8, USB_CLOCK_INTERNAL);
//HWREG(USB0_BASE + USB_O_CC) = (8 - 1) | USB_CLOCK_INTERNAL;
ROM_SysCtlUSBPLLEnable();
// 3. Enable USB D+ D- pins
// 4. Activate USB DFU
ROM_SysCtlDelay(ui32SysClock * 2 / 3);
ROM_IntMasterEnable(); // Re-enable interrupts at NVIC level
ROM_UpdateUSB(0);
// 5. Should never get here since update is in progress
#endif // BOOTLOADER_TEST
//
// Enable the GPIO port that is used for the on-board LED.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); // gjs Our board uses GPIOB for LEDs
// gjs original ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
//
// Enable the GPIO pins for the LED (PF2 & PF3).
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_0|GPIO_PIN_1);
// gjs original ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3|GPIO_PIN_2);
//
// Not configured initially.
//
g_bUSBConfigured = false;
//
// Enable the UART that we will be redirecting.
//
ROM_SysCtlPeripheralEnable(USB_UART_PERIPH);
//
// Enable and configure the UART RX and TX pins
//
ROM_SysCtlPeripheralEnable(TX_GPIO_PERIPH);
ROM_SysCtlPeripheralEnable(RX_GPIO_PERIPH);
ROM_GPIOPinTypeUART(TX_GPIO_BASE, TX_GPIO_PIN);
ROM_GPIOPinTypeUART(RX_GPIO_BASE, RX_GPIO_PIN);
//
// TODO: Add code to configure handshake GPIOs if required.
//
//
// Set the default UART configuration.
//
ROM_UARTConfigSetExpClk(USB_UART_BASE, ROM_SysCtlClockGet(),
DEFAULT_BIT_RATE, DEFAULT_UART_CONFIG);
ROM_UARTFIFOLevelSet(USB_UART_BASE, UART_FIFO_TX4_8, UART_FIFO_RX4_8);
//
// Configure and enable UART interrupts.
//
ROM_UARTIntClear(USB_UART_BASE, ROM_UARTIntStatus(USB_UART_BASE, false));
ROM_UARTIntEnable(USB_UART_BASE, (UART_INT_OE | UART_INT_BE | UART_INT_PE |
UART_INT_FE | UART_INT_RT | UART_INT_TX | UART_INT_RX));
//
// Enable the system tick.
//
#if 0
ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND);
ROM_SysTickIntEnable();
ROM_SysTickEnable();
#endif
//
// Initialize the transmit and receive buffers.
//
USBBufferInit(&g_sTxBuffer);
USBBufferInit(&g_sRxBuffer);
//
// Set the USB stack mode to Device mode with VBUS monitoring.
//
USBStackModeSet(0, eUSBModeDevice, 0);
//
// Pass our device information to the USB library and place the device
// on the bus.
//
USBDCDCInit(0, &g_sCDCDevice);
//
// Clear our local byte counters.
//
ui32RxCount = 0;
ui32TxCount = 0;
//
// Enable interrupts now that the application is ready to start.
//
ROM_IntEnable(USB_UART_INT);
// Enable FreeRTOS
mainA(); // FreeRTOS. Will not return
#if 0
//
// Main application loop.
//
while(1)
{
//
// Have we been asked to update the status display?
//
if(g_ui32Flags & COMMAND_STATUS_UPDATE)
{
//
// Clear the command flag
//
ROM_IntMasterDisable();
g_ui32Flags &= ~COMMAND_STATUS_UPDATE;
ROM_IntMasterEnable();
}
//
// Has there been any transmit traffic since we last checked?
//
if(ui32TxCount != g_ui32UARTTxCount)
{
//
// Turn on the Green LED.
//
// gjs ROM_UARTCharPutNonBlocking(USB_UART_BASE, 'b');
#if 1
if (ui32TxCount & 1) {
GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0, GPIO_PIN_0);
} else {
GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0, 0);
}
#else
if (1 || g_ui32UARTTxCount & 0x01) {
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3);
} else {
//GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);
}
//
// Delay for a bit.
//
for(uint32_t ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
{
}
//
// Turn off the Green LED.
//
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0);
#endif
//
// Take a snapshot of the latest transmit count.
//
ui32TxCount = g_ui32UARTTxCount;
}
//
// Has there been any receive traffic since we last checked?
//
if(ui32RxCount != g_ui32UARTRxCount)
{
//
// Turn on the Blue LED.
//
#if 1
if (ui32RxCount & 1) {
GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_1, GPIO_PIN_1);
} else {
GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_1, 0);
}
#else
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);
//
// Delay for a bit.
//
for(uint32_t ui32Loop = 0; ui32Loop < 150000; ui32Loop++)
{
}
//
// Turn off the Blue LED.
//
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0);
#endif
//
// Take a snapshot of the latest receive count.
//
ui32RxCount = g_ui32UARTRxCount;
}
}
#endif
}
//*****************************************************************************
//
// Process data to produce a CRC-32 checksum.
//
//*****************************************************************************
uint32_t
CRC32DataProcess(uint32_t *pui32Data, uint32_t ui32Length, uint32_t ui32Seed,
bool bUseDMA)
{
uint32_t ui32Result;
//
// Perform a soft reset.
//
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_CCM0);
while(!ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0))
{
}
//
// Configure the CRC engine.
//
ROM_CRCConfigSet(CCM0_BASE, (CRC_CFG_INIT_SEED | CRC_CFG_TYPE_P4C11DB7 |
CRC_CFG_SIZE_32BIT));
//
// Write the seed.
//
ROM_CRCSeedSet(CCM0_BASE, ui32Seed);
//
// Generate CRC using uDMA to copy data.
//
if(bUseDMA)
{
//
// Setup the DMA module to copy data in.
//
ROM_uDMAChannelAssign(UDMA_CH30_SW);
ROM_uDMAChannelAttributeDisable(UDMA_CH30_SW,
UDMA_ATTR_ALTSELECT |
UDMA_ATTR_USEBURST |
UDMA_ATTR_HIGH_PRIORITY |
UDMA_ATTR_REQMASK);
ROM_uDMAChannelControlSet(UDMA_CH30_SW | UDMA_PRI_SELECT,
UDMA_SIZE_32 | UDMA_SRC_INC_32 |
UDMA_DST_INC_NONE | UDMA_ARB_1 |
UDMA_DST_PROT_PRIV);
ROM_uDMAChannelTransferSet(UDMA_CH30_SW | UDMA_PRI_SELECT,
UDMA_MODE_AUTO, (void *)g_pui32RandomData,
(void *)(CCM0_BASE + CCM_O_CRCDIN),
ui32Length);
ROM_uDMAChannelEnable(UDMA_CH30_SW);
UARTprintf(" Data in DMA request enabled.\n");
//
// Start the uDMA.
//
ROM_uDMAChannelRequest(UDMA_CH30_SW | UDMA_PRI_SELECT);
//
// Wait for the transfer to finish.
//
while(ROM_uDMAChannelIsEnabled(UDMA_CH30_SW))
{
}
//
// Read the result.
//
ui32Result = ROM_CRCResultRead(CCM0_BASE, false);
}
//
// Generate CRC using CPU to copy data.
//
else
{
ui32Result = ROM_CRCDataProcess(CCM0_BASE, g_pui32RandomData,
ui32Length, false);
}
return(ui32Result);
}
//*****************************************************************************
//
// This is the main loop that runs the application.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32Read, ui32Write;
//
// Run from the PLL at 120 MHz.
//
g_ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins.
//
PinoutSet();
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(g_ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "usb-dev-msc");
//
// Place the static status text on the display.
//
GrStringDrawCentered(&g_sContext, "Status", -1, 160, 58, false);
GrStringDrawCentered(&g_sContext, "Bytes Read", -1, 160, 118, false);
GrStringDrawCentered(&g_sContext, "Bytes Written", -1, 160, 178, false);
GrContextForegroundSet(&g_sContext, ClrGray);
UpdateCount(0, 138);
UpdateCount(0, 198);
//
// Configure SysTick for a 100Hz interrupt. This is to detect idle state
// every 10ms after a state change.
//
ROM_SysTickPeriodSet(g_ui32SysClock / 100);
ROM_SysTickEnable();
ROM_SysTickIntEnable();
//
// Configure and enable uDMA
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA);
SysCtlDelay(10);
ROM_uDMAControlBaseSet(&psDMAControlTable[0]);
ROM_uDMAEnable();
//
// Initialize the idle timeout and reset all flags.
//
g_ui32IdleTimeout = 0;
g_ui32Flags = 0;
//
// Initialize the state to idle.
//
g_eMSCState = MSC_DEV_DISCONNECTED;
//
// Draw the status bar and set it to idle.
//
UpdateStatus("Disconnected");
//
// Enable the USB controller.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
//
// Enable the SSI3 used by SPI flash.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI3);
ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_SSI3);
//
// Set the USB stack mode to Device mode with VBUS monitoring.
//
USBStackModeSet(0, eUSBModeDevice, 0);
//
// Pass our device information to the USB library and place the device
// on the bus.
//
USBDMSCInit(0, (tUSBDMSCDevice*)&g_sMSCDevice);
//
// Initialize the SD card, if present. This prevents it from interfering
// with accesses to the SPI flash.
//
disk_initialize(0);
//
// Initialize MX66L51235F Flash memory.
//
MX66L51235FInit(g_ui32SysClock);
//
// Drop into the main loop.
//
ui32Read = g_ui32ReadCount;
ui32Write = g_ui32WriteCount;
while(1)
{
switch(g_eMSCState)
{
case MSC_DEV_READ:
{
//
// Update the screen if necessary.
//
if(g_ui32Flags & FLAG_UPDATE_STATUS)
{
UpdateStatus(" Reading ");
g_ui32Flags &= ~FLAG_UPDATE_STATUS;
}
//
// If there is no activity then return to the idle state.
//
if(g_ui32IdleTimeout == 0)
{
UpdateStatus(" Idle ");
g_eMSCState = MSC_DEV_IDLE;
}
break;
}
case MSC_DEV_WRITE:
{
//
// Update the screen if necessary.
//
if(g_ui32Flags & FLAG_UPDATE_STATUS)
{
UpdateStatus(" Writing ");
g_ui32Flags &= ~FLAG_UPDATE_STATUS;
}
//
// If there is no activity then return to the idle state.
//
if(g_ui32IdleTimeout == 0)
{
UpdateStatus(" Idle ");
g_eMSCState = MSC_DEV_IDLE;
}
break;
}
case MSC_DEV_DISCONNECTED:
{
//
// Update the screen if necessary.
//
if(g_ui32Flags & FLAG_UPDATE_STATUS)
{
UpdateStatus(" Disconnected ");
g_ui32Flags &= ~FLAG_UPDATE_STATUS;
}
break;
}
case MSC_DEV_IDLE:
{
break;
}
default:
{
break;
}
}
//
// Update the read count if it has changed.
//
if(g_ui32ReadCount != ui32Read)
{
ui32Read = g_ui32ReadCount;
UpdateCount(ui32Read, 138);
}
//
// Update the write count if it has changed.
//
if(g_ui32WriteCount != ui32Write)
{
ui32Write = g_ui32WriteCount;
UpdateCount(ui32Write, 198);
}
}
}