//*****************************************************************************
//
// This function initializes the ADC hardware in preparation for data
// acquisition.
//
//*****************************************************************************
void
AcquireInit(void)
{
unsigned long ulChan;
//
// Enable the ADC peripherals and the associated GPIO port
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOP);
ROM_SysCtlADCSpeedSet(SYSCTL_ADCSPEED_125KSPS);
ROM_GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 |GPIO_PIN_7 | GPIO_PIN_3);
ROM_GPIOPinTypeADC(GPIO_PORTP_BASE, GPIO_PIN_0);
// ROM_ADCReferenceSet(ADC0_BASE, ADC_REF_EXT_3V);
//ROM_ADCR
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
HWREG(GPIO_PORTB_BASE + GPIO_O_AMSEL) |= GPIO_PIN_6;
ADCSequenceDisable(ADC0_BASE,SEQUENCER);
ROM_ADCSequenceConfigure(ADC0_BASE, SEQUENCER, ADC_TRIGGER_TIMER, 0);
for(ulChan = 0; ulChan < 2; ulChan++)
{
unsigned long ulChCtl;
if (ulChan ==1)
{
ROM_ADCSequenceStepConfigure(ADC0_BASE, SEQUENCER, ulChan, ADC_CTL_CH1|ADC_CTL_IE | ADC_CTL_END);
}
else if(ulChan==0)
{
ulChCtl = ADC_CTL_CH0;
ROM_ADCSequenceStepConfigure(ADC0_BASE, SEQUENCER, ulChan, ADC_CTL_CH0);
}
}
ADCHardwareOversampleConfigure(ADC0_BASE, 1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
//SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1);
ROM_TimerConfigure(TIMER0_BASE,TIMER_CFG_32_BIT_PER );
//100 micro
unsigned long freq=SAMPLING_FREQUENCY;
unsigned long period=(2*ROM_SysCtlClockGet()/(freq));
ROM_TimerLoadSet(TIMER0_BASE, TIMER_A,period);
ROM_TimerControlTrigger(TIMER0_BASE, TIMER_A, true);
//ROM_TimerConfigure(TIMER1_BASE, TIMER_CFG_PERIODIC);
//ROM_TimerLoadSet(TIMER1_BASE, TIMER_A, ROM_SysCtlClockGet() /2);
CFAL96x64x16Init();
GrContextInit(&sDisplayContext, &g_sCFAL96x64x16);
sRect1.sXMin = 0;
sRect1.sYMin = 0;
sRect1.sXMax = GrContextDpyWidthGet(&sDisplayContext) - 1;
sRect1.sYMax = 23;
sRect2.sXMin = 0;
sRect2.sYMin = 23;
sRect2.sXMax = GrContextDpyWidthGet(&sDisplayContext) - 1;
sRect2.sYMax = GrContextDpyHeightGet(&sDisplayContext) - 1;
snprintf(text,sizeof(text),"STart");
GrContextForegroundSet(&sDisplayContext, ClrDarkBlue);
GrRectFill(&sDisplayContext, &sRect1);
GrContextForegroundSet(&sDisplayContext, ClrWhite);
//GrRectDraw(&sDisplayContext, &sRect1);
GrContextFontSet(&sDisplayContext, g_pFontCm12);
GrStringDrawCentered(&sDisplayContext,text, -1,
GrContextDpyWidthGet(&sDisplayContext) / 2, 10, 0);
//GrContextForegroundSet(&sDisplayContext, ClrDarkBlue);
//GrRectFill(&sDisplayContext, &sRect1);
//GrContextForegroundSet(&sDisplayContext, ClrWhite);
//GrRectDraw(&sDisplayContext, &sRect1);
/*GrContextForegroundSet(&sDisplayContext, ClrDarkBlue);
GrRectFill(&sDisplayContext, &sRect2);
GrContextForegroundSet(&sDisplayContext, ClrWhite);
GrRectDraw(&sDisplayContext, &sRect2);
*/
compute_filter();
maxi1=0;
maxi2=0;
max1=0;
max2=0;
res=0;
res1=0;
g_ulADCCount=0;
buffer_index=0;
ulLastADCCount=0;
}
//*****************************************************************************
//
//! Initializes the touch screen driver.
//!
//! This function initializes the touch screen driver, beginning the process of
//! reading from the touch screen. This driver uses the following hardware
//! resources:
//!
//! - ADC sample sequence 3
//! - Timer 1 subtimer A
//!
//! \return None.
//
//*****************************************************************************
void
TouchScreenInit(void)
{
//
// Set the initial state of the touch screen driver's state machine.
//
g_ulTSState = TS_STATE_INIT;
//
// Determine which calibration parameter set we will be using.
//
g_plParmSet = g_lTouchParameters[SET_NORMAL];
if(g_eDaughterType == DAUGHTER_SRAM_FLASH)
{
//
// If the SRAM/Flash daughter board is present, select the appropriate
// calibration parameters and reading threshold value.
//
g_plParmSet = g_lTouchParameters[SET_SRAM_FLASH];
g_sTouchMin = 40;
}
else if(g_eDaughterType == DAUGHTER_FPGA)
{
//
// If the FPGA daughter board is present, select the appropriate
// calibration parameters and reading threshold value.
//
g_plParmSet = g_lTouchParameters[SET_FPGA];
g_sTouchMin = 70;
}
//
// There is no touch screen handler initially.
//
g_pfnTSHandler = 0;
//
// Enable the peripherals used by the touch screen interface.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ROM_SysCtlPeripheralEnable(TS_P_PERIPH);
ROM_SysCtlPeripheralEnable(TS_N_PERIPH);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1);
//
// Configure the ADC sample sequence used to read the touch screen reading.
//
ROM_ADCHardwareOversampleConfigure(ADC0_BASE, 4);
ROM_ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_TIMER, 0);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0,
ADC_CTL_CH_YP | ADC_CTL_END | ADC_CTL_IE);
ROM_ADCSequenceEnable(ADC0_BASE, 3);
//
// Enable the ADC sample sequence interrupt.
//
ROM_ADCIntEnable(ADC0_BASE, 3);
ROM_IntEnable(INT_ADC0SS3);
//
// Configure the GPIOs used to drive the touch screen layers.
//
ROM_GPIOPinTypeGPIOOutput(TS_P_BASE, TS_XP_PIN | TS_YP_PIN);
//
// If no daughter board or one which does not rewire the touchscreen
// interface is installed, set up GPIOs to drive the XN and YN signals.
//
if((g_eDaughterType != DAUGHTER_SRAM_FLASH) &&
(g_eDaughterType != DAUGHTER_FPGA))
{
ROM_GPIOPinTypeGPIOOutput(TS_N_BASE, TS_XN_PIN | TS_YN_PIN);
}
ROM_GPIOPinWrite(TS_P_BASE, TS_XP_PIN | TS_YP_PIN, 0x00);
if(g_eDaughterType == DAUGHTER_SRAM_FLASH)
{
HWREGB(LCD_CONTROL_CLR_REG) = LCD_CONTROL_XN | LCD_CONTROL_YN;
}
else if(g_eDaughterType == DAUGHTER_FPGA)
{
HWREGH(LCD_FPGA_CONTROL_CLR_REG) = LCD_CONTROL_XN | LCD_CONTROL_YN;
}
else
{
ROM_GPIOPinWrite(TS_N_BASE, TS_XN_PIN | TS_YN_PIN, 0x00);
}
//
// See if the ADC trigger timer has been configured, and configure it only
// if it has not been configured yet.
//
if((HWREG(TIMER1_BASE + TIMER_O_CTL) & TIMER_CTL_TAEN) == 0)
{
//
// Configure the timer to trigger the sampling of the touch screen
// every millisecond.
//
ROM_TimerConfigure(TIMER1_BASE, (TIMER_CFG_SPLIT_PAIR |
TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC));
ROM_TimerLoadSet(TIMER1_BASE, TIMER_A,
(ROM_SysCtlClockGet() / 1000) - 1);
ROM_TimerControlTrigger(TIMER1_BASE, TIMER_A, true);
//
// Enable the timer. At this point, the touch screen state machine
// will sample and run once per millisecond.
//
ROM_TimerEnable(TIMER1_BASE, TIMER_A);
}
}
//*****************************************************************************
//
//! Initializes the touch screen driver.
//!
//! This function initializes the touch screen driver, beginning the process of
//! reading from the touch screen. This driver uses the following hardware
//! resources:
//!
//! - ADC sample sequence 3
//! - Timer 1 subtimer A
//!
//! \return None.
//
//*****************************************************************************
void
TouchScreenInit(void)
{
//
// Set the initial state of the touch screen driver's state machine.
//
g_ulTSState = TS_STATE_INIT;
//
// There is no touch screen handler initially.
//
g_pfnTSHandler = 0;
//
// Enable the peripherals used by the touch screen interface.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ROM_SysCtlPeripheralEnable(TS_P_PERIPH);
ROM_SysCtlPeripheralEnable(TS_N_PERIPH);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1);
//
// Configure the ADC sample sequence used to read the touch screen reading.
//
ROM_ADCHardwareOversampleConfigure(ADC0_BASE, 4);
ROM_ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_TIMER, 0);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0,
ADC_CTL_CH_YP | ADC_CTL_END | ADC_CTL_IE);
ROM_ADCSequenceEnable(ADC0_BASE, 3);
//
// Enable the ADC sample sequence interrupt.
//
ROM_ADCIntEnable(ADC0_BASE, 3);
ROM_IntEnable(INT_ADC0SS3);
//
// Configure the GPIOs used to drive the touch screen layers.
//
ROM_GPIOPinTypeGPIOOutput(TS_P_BASE, TS_XP_PIN | TS_YP_PIN);
ROM_GPIOPinTypeGPIOOutput(TS_N_BASE, TS_XN_PIN | TS_YN_PIN);
ROM_GPIOPinWrite(TS_P_BASE, TS_XP_PIN | TS_YP_PIN, 0x00);
ROM_GPIOPinWrite(TS_N_BASE, TS_XN_PIN | TS_YN_PIN, 0x00);
//
// See if the ADC trigger timer has been configured, and configure it only
// if it has not been configured yet.
//
if((HWREG(TIMER1_BASE + TIMER_O_CTL) & TIMER_CTL_TAEN) == 0)
{
//
// Configure the timer to trigger the sampling of the touch screen
// every millisecond.
//
ROM_TimerConfigure(TIMER1_BASE, (TIMER_CFG_SPLIT_PAIR |
TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC));
ROM_TimerLoadSet(TIMER1_BASE, TIMER_A, (SysCtlClockGet() / 1000) - 1);
ROM_TimerControlTrigger(TIMER1_BASE, TIMER_A, true);
//
// Enable the timer. At this point, the touch screen state machine
// will sample and run once per millisecond.
//
ROM_TimerEnable(TIMER1_BASE, TIMER_A);
}
}
