void CC3100_InterruptDisable()
{
GPIOIntDisable(CC3100_IRQBASE,CC3100_IRQPIN);
#ifdef SL_IF_TYPE_UART
ROM_UARTIntDisable(CC3100_UARTBASE, UART_INT_RX);
#endif
}
void
HardwareSerial::setModule(unsigned long module)
{
ROM_UARTIntDisable(UART_BASE, UART_INT_RX | UART_INT_RT);
ROM_IntDisable(g_ulUARTInt[uartModule]);
uartModule = module;
begin(baudRate);
}
/*
* closeOptode turns off the Optode (removes power
* and disables UART3).
*/
void closeOptode(void)
{
//disable UART3 and its interrupt
ROM_UARTIntDisable(UART3_BASE, UART_INT_RX);
ROM_UARTDisable(UART3_BASE);
//turn off power
OPTODE_OFF;
}
void HardwareSerial::UARTIntHandler(void){
unsigned long ulInts;
long lChar;
// Get and clear the current interrupt source(s)
//
ulInts = ROM_UARTIntStatus(UART_BASE, true);
ROM_UARTIntClear(UART_BASE, ulInts);
// Are we being interrupted because the TX FIFO has space available?
//
if(ulInts & UART_INT_TX)
{
//
// Move as many bytes as we can into the transmit FIFO.
//
primeTransmit(UART_BASE);
//
// If the output buffer is empty, turn off the transmit interrupt.
//
if(TX_BUFFER_EMPTY)
{
ROM_UARTIntDisable(UART_BASE, UART_INT_TX);
}
}
if(ulInts & (UART_INT_RX | UART_INT_RT))
{
while(ROM_UARTCharsAvail(UART_BASE))
{
//
// Read a character
//
lChar = ROM_UARTCharGetNonBlocking(UART_BASE);
//
// If there is space in the receive buffer, put the character
// there, otherwise throw it away.
//
uint8_t volatile full = RX_BUFFER_FULL;
if(full) break;
rxBuffer[rxWriteIndex] =
(unsigned char)(lChar & 0xFF);
rxWriteIndex = ((rxWriteIndex) + 1) % rxBufferSize;
//
// If we wrote anything to the transmit buffer, make sure it actually
// gets transmitted.
//
}
primeTransmit(UART_BASE);
ROM_UARTIntEnable(UART_BASE, UART_INT_TX);
}
}
int uart_Read(Fd_t fd, unsigned char *pBuff, int len)
{
int i = 0;
ROM_UARTIntDisable(UART1_BASE, UART_INT_RX);
for(i=0; i< len; i++)
{
pBuff[i] = (unsigned char)UARTCharGet(UART1_BASE);
}
ROM_UARTIntEnable(UART1_BASE, UART_INT_RX);
return len;
}
//*****************************************************************************
//
// Interrupt handler for the UART which we are redirecting via USB.
//
//*****************************************************************************
void
USBUARTIntHandler(void)
{
uint32_t ui32Ints;
int32_t i32Errors;
//
// Get and clear the current interrupt source(s)
//
ui32Ints = ROM_UARTIntStatus(USB_UART_BASE, true);
ROM_UARTIntClear(USB_UART_BASE, ui32Ints);
//
// Are we being interrupted because the TX FIFO has space available?
//
if(ui32Ints & UART_INT_TX)
{
//
// Move as many bytes as we can into the transmit FIFO.
//
USBUARTPrimeTransmit(USB_UART_BASE);
//
// If the output buffer is empty, turn off the transmit interrupt.
//
if(!USBBufferDataAvailable(&g_sRxBuffer))
{
ROM_UARTIntDisable(USB_UART_BASE, UART_INT_TX);
}
}
//
// Handle receive interrupts.
//
// gjs if(ui32Ints & (UART_INT_RX))
if(ui32Ints & (UART_INT_RX | UART_INT_RT))
{
//
// Read the UART's characters into the buffer.
//
i32Errors = ReadUARTData();
//
// Check to see if we need to notify the host of any errors we just
// detected.
//
CheckForSerialStateChange(&g_sCDCDevice, i32Errors);
}
}
//*****************************************************************************
//
// Interrupt handler for the UART which is being redirected via USB.
//
//*****************************************************************************
void
USBUARTIntHandler(void)
{
unsigned long ulInts;
long lErrors;
//
// Get and clear the current interrupt source(s)
//
ulInts = ROM_UARTIntStatus(UART0_BASE, true);
ROM_UARTIntClear(UART0_BASE, ulInts);
//
// Handle transmit interrupts.
//
if(ulInts & UART_INT_TX)
{
//
// Move as many bytes as possible into the transmit FIFO.
//
USBUARTPrimeTransmit();
//
// If the output buffer is empty, turn off the transmit interrupt.
//
if(!USBBufferDataAvailable(&g_sRxBuffer))
{
ROM_UARTIntDisable(UART0_BASE, UART_INT_TX);
}
}
//
// Handle receive interrupts.
//
if(ulInts & (UART_INT_RX | UART_INT_RT))
{
//
// Read the UART's characters into the buffer.
//
lErrors = ReadUARTData();
//
// Check to see if the host needs to be notified of any errors just
// detected.
//
CheckForSerialStateChange(&g_sCDCDevice, lErrors);
}
}
char UARTgetc(uint8_t UART)
{
if (!rxQSize(UART))
{
// Disable interrupt to avoid possible race condition
ROM_UARTIntDisable(UARTBASE[UART], UART_INT_RX);
// Wait for data if the buffer is empty
while (!rxQSize(UART)) flushReadFIFO(UART);
// Return to the previous state
ROM_UARTIntEnable(UARTBASE[UART], UART_INT_RX);
}
return (char)rxDequeue(UART);
}
char UARTpeekBlocking(uint8_t UART)
{
// If there is data in the buffer return that
if (rxQSize(UART)) return rxBuff[UART][rxBufferTail[UART]];
// Disable interrupt to avoid possible race condition
ROM_UARTIntDisable(UARTBASE[UART], UART_INT_RX);
// Wait for data if the buffer is empty
while (!rxQSize(UART)) flushReadFIFO(UART);
// Return to the previous state
ROM_UARTIntEnable(UARTBASE[UART], UART_INT_RX);
// Return what was read without popping it from the queue
return rxBuff[UART][rxBufferTail[UART]];
}
void
HardwareSerial::begin(unsigned long baud)
{
//
// Initialize the UART.
//
ROM_SysCtlPeripheralEnable(g_ulUARTInt[uartModule]);
//TODO:Add functionality for PinConfigure with variable uartModule
ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Only allow a single instance to be opened.
//
ASSERT(g_ulUARTBase[uartModule] == 0);
//
// Check to make sure the UART peripheral is present.
//
if(!ROM_SysCtlPeripheralPresent(g_ulUARTPeriph[uartModule]))
{
return;
}
ROM_SysCtlPeripheralEnable(g_ulUARTPeriph[uartModule]);
ROM_UARTConfigSetExpClk(g_ulUARTBase[uartModule], ROM_SysCtlClockGet(), baud,
(UART_CONFIG_PAR_NONE | UART_CONFIG_STOP_ONE |
UART_CONFIG_WLEN_8));
//
// Set the UART to interrupt whenever the TX FIFO is almost empty or
// when any character is received.
//
ROM_UARTFIFOLevelSet(g_ulUARTBase[uartModule], UART_FIFO_TX1_8, UART_FIFO_RX1_8);
flushAll();
ROM_UARTIntDisable(g_ulUARTBase[uartModule], 0xFFFFFFFF);
ROM_UARTIntEnable(g_ulUARTBase[uartModule], UART_INT_RX | UART_INT_RT);
ROM_IntMasterEnable();
ROM_IntEnable(g_ulUARTInt[uartModule]);
//
// Enable the UART operation.
//
ROM_UARTEnable(g_ulUARTBase[uartModule]);
}
int UARTpeek(uint8_t UART)
{
// If there is data in the buffer return that
if (rxQSize(UART)) return rxBuff[UART][rxBufferTail[UART]];
// Disable interrupt to avoid possible race condition
ROM_UARTIntDisable(UARTBASE[UART], UART_INT_RX);
// Try flushing the hardware FIFO and see if we can get data from there
flushReadFIFO(UART);
if (rxQSize(UART)) return rxBuff[UART][rxBufferTail[UART]];
// Return to the previous state
ROM_UARTIntEnable(UARTBASE[UART], UART_INT_RX);
// No data was found
return -255;
}
void HardwareSerial::end()
{
unsigned long ulInt = ROM_IntMasterDisable();
flushAll();
//
// If interrupts were enabled when we turned them off, turn them
// back on again.
//
if(!ulInt)
{
ROM_IntMasterEnable();
}
ROM_IntDisable(g_ulUARTInt[uartModule]);
ROM_UARTIntDisable(UART_BASE, UART_INT_RX | UART_INT_RT);
}
void
HardwareSerial::begin(unsigned long baud)
{
baudRate = baud;
//
// Initialize the UART.
//
ROM_SysCtlPeripheralEnable(g_ulUARTPeriph[uartModule]);
//TODO:Add functionality for PinConfigure with variable uartModule
ROM_GPIOPinConfigure(g_ulUARTConfig[uartModule][0]);
ROM_GPIOPinConfigure(g_ulUARTConfig[uartModule][1]);
ROM_GPIOPinTypeUART(g_ulUARTPort[uartModule], g_ulUARTPins[uartModule]);
ROM_UARTConfigSetExpClk(UART_BASE, F_CPU, baudRate,
(UART_CONFIG_PAR_NONE | UART_CONFIG_STOP_ONE |
UART_CONFIG_WLEN_8));
//
// Set the UART to interrupt whenever the TX FIFO is almost empty or
// when any character is received.
//
ROM_UARTFIFOLevelSet(UART_BASE, UART_FIFO_TX1_8, UART_FIFO_RX1_8);
flushAll();
ROM_UARTIntDisable(UART_BASE, 0xFFFFFFFF);
ROM_UARTIntEnable(UART_BASE, UART_INT_RX | UART_INT_RT);
ROM_IntEnable(g_ulUARTInt[uartModule]);
//
// Enable the UART operation.
//
ROM_UARTEnable(UART_BASE);
// Allocate TX & RX buffers
if (txBuffer != (unsigned char *)0xFFFFFFFF) // Catch attempts to re-init this Serial instance by freeing old buffer first
free(txBuffer);
if (rxBuffer != (unsigned char *)0xFFFFFFFF) // Catch attempts to re-init this Serial instance by freeing old buffer first
free(rxBuffer);
txBuffer = (unsigned char *) malloc(txBufferSize);
rxBuffer = (unsigned char *) malloc(rxBufferSize);
SysCtlDelay(100);
}
//*****************************************************************************
//
// The UART interrupt handler.
//
//*****************************************************************************
void UARTIntHandler(void)
{
uint32_t ui32Status;
char data;
//
// Get the interrrupt status.
//
ui32Status = ROM_UARTIntStatus(UART0_BASE, true);
UARTIntClear(UART0_BASE, ui32Status);
if ((ui32Status&UART_INT_RX) == UART_INT_RX)
{
//
// Loop while there are characters in the receive FIFO.
//
while(ROM_UARTCharsAvail(UART0_BASE))
{
//
// Read the next character from the UART and write it back to the UART.
//
data = (char)ROM_UARTCharGetNonBlocking(UART0_BASE);
OSQueuePost(qUART, data);
}
}
if ((ui32Status&UART_INT_TX) == UART_INT_TX)
{
ROM_UARTIntDisable(UART0_BASE, UART_INT_TX);
// Call the keyboard analysis task
OSSemPost(sUART);
}
// ************************
// Interrupt Exit
// ************************
OS_INT_EXIT_EXT();
// ************************
}
//*****************************************************************************
//
// Sends a character to the UART.
//
//*****************************************************************************
static void
UARTIFPutChar(unsigned long ulChar)
{
//
// See if the character being sent is 0xff.
//
if(ulChar == 0xff)
{
//
// Send 0xfe 0xfe, the escaped version of 0xff. A sign extended
// version of 0xfe is used to avoid the check below for 0xfe, thereby
// avoiding an infinite loop. Only the lower 8 bits are actually sent,
// so 0xfe is what is actually transmitted.
//
UARTIFPutChar(0xfffffffe);
UARTIFPutChar(0xfffffffe);
}
//
// Otherwise, see if the character being sent is 0xfe.
//
else if(ulChar == 0xfe)
{
//
// Send 0xfe 0xfd, the escaped version of 0xfe. A sign extended
// version of 0xfe is used to avoid the check above for 0xfe, thereby
// avoiding an infinite loop. Only the lower 8 bits are actually sent,
// so 0xfe is what is actually transmitted.
//
UARTIFPutChar(0xfffffffe);
UARTIFPutChar(0xfd);
}
//
// Otherwise, simply send this character.
//
else
{
//
// Disable the UART interrupt to avoid having characters stick in the
// local buffer.
//
ROM_UARTIntDisable(UART0_BASE, UART_INT_TX);
//
// See if the local buffer is empty and there is space available in the
// UART FIFO.
//
if((g_ulUARTXmitRead == g_ulUARTXmitWrite) &&
ROM_UARTSpaceAvail(UART0_BASE))
{
//
// Simply write this character into the UART FIFO.
//
ROM_UARTCharPut(UART0_BASE, ulChar);
}
else
{
//
// Write this character into the local buffer.
//
g_pucUARTXmit[g_ulUARTXmitWrite] = ulChar;
//
// Increment the local write buffer pointer.
//
g_ulUARTXmitWrite = (g_ulUARTXmitWrite + 1) % UART_XMIT_SIZE;
}
//
// Re-enable the UART interrupt.
//
ROM_UARTIntEnable(UART0_BASE, UART_INT_TX);
}
}
Fd_t uart_Open(char *ifName, unsigned long flags)
{
/* Configure CS (PE0) and nHIB (PE4) lines */
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_4);
ROM_GPIOPinWrite(GPIO_PORTE_BASE,GPIO_PIN_4, PIN_LOW);
/* configuring UART interface */
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
GPIOPinConfigure(GPIO_PB0_U1RX);
GPIOPinConfigure(GPIO_PB1_U1TX);
ROM_GPIOPinTypeUART(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
GPIOPinConfigure(GPIO_PC4_U1RTS);
GPIOPinConfigure(GPIO_PC5_U1CTS);
ROM_GPIOPinTypeUART(GPIO_PORTC_BASE, GPIO_PIN_4 | GPIO_PIN_5);
GPIOPadConfigSet(GPIO_PORTB_BASE, GPIO_PIN_0, GPIO_STRENGTH_2MA,
GPIO_PIN_TYPE_STD_WPU);
/* configure with baud rate 115200 */
ROM_UARTConfigSetExpClk(UART1_BASE, ROM_SysCtlClockGet(), 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
UARTFlowControlSet(UART1_BASE, UART_FLOWCONTROL_TX | UART_FLOWCONTROL_RX);
UARTFIFOLevelSet(UART1_BASE, UART_FIFO_TX1_8, UART_FIFO_RX1_8);
ROM_UARTEnable(UART1_BASE);
ROM_UARTFIFOEnable(UART1_BASE);
ROM_IntEnable(INT_UART1);
ROM_UARTIntEnable(UART1_BASE, UART_INT_RX);
ROM_UARTIntDisable(UART1_BASE, UART_INT_TX | UART_INT_RT);
/* configure host IRQ line */
GPIOPinTypeGPIOInput(GPIO_PORTB_BASE, GPIO_PIN_2);
GPIOPadConfigSet(GPIO_PORTB_BASE, GPIO_PIN_2, GPIO_STRENGTH_2MA,
GPIO_PIN_TYPE_STD_WPD);
GPIOIntTypeSet(GPIO_PORTB_BASE, GPIO_PIN_2, GPIO_RISING_EDGE);
GPIOIntClear(GPIO_PORTB_BASE,GPIO_PIN_2);
GPIOIntDisable(GPIO_PORTB_BASE,GPIO_PIN_2);
ROM_IntEnable(INT_GPIOB);
ROM_IntMasterEnable();
IntIsMasked = FALSE;
/* Enable WLAN interrupt */
CC3100_InterruptEnable();
/* 50 ms delay */
ROM_SysCtlDelay((ROM_SysCtlClockGet()/(3*1000))*50 );
return NONOS_RET_OK;
}
