void UART1_IRQHandler() {
uint32_t interruptSource = UART_GetIntId(UART1_DEVICE)
& UART_IIR_INTID_MASK;
if(interruptSource == 0) {
// Check Modem status
uint8_t modemStatus = UART_FullModemGetStatus(LPC_UART1);
// Check CTS status change flag
if (modemStatus & UART1_MODEM_STAT_DELTA_CTS) {
// if CTS status is active, continue to send data
if (modemStatus & UART1_MODEM_STAT_CTS) {
CTS_STATE = ACTIVE;
UART_TxCmd(UART1_DEVICE, ENABLE);
} else {
// Otherwise, Stop current transmission immediately
CTS_STATE = INACTIVE;
UART_TxCmd(UART1_DEVICE, DISABLE);
}
}
}
switch(interruptSource) {
case UART_IIR_INTID_RDA:
case UART_IIR_INTID_CTI:
handleReceiveInterrupt();
break;
case UART_IIR_INTID_THRE:
handleTransmitInterrupt();
break;
}
}
/*********************************************************************//**
* @brief UART1 interrupt handler sub-routine
* @param[in] None
* @return None
**********************************************************************/
void UART1_IRQHandler(void)
{
uint8_t modemsts;
uint32_t intsrc, tmp, tmp1;
/* Determine the interrupt source */
intsrc = UART_GetIntId((LPC_UART_TypeDef *)LPC_UART1);
tmp = intsrc & UART_IIR_INTID_MASK;
/*
* In case of using UART1 with full modem,
* interrupt ID = 0 that means modem status interrupt has been detected
*/
if (tmp == 0){
// Check Modem status
modemsts = UART_FullModemGetStatus(LPC_UART1);
#if (AUTO_RTS_CTS_USE == 0)
// Check CTS status change flag
if (modemsts & UART1_MODEM_STAT_DELTA_CTS) {
// if CTS status is active, continue to send data
if (modemsts & UART1_MODEM_STAT_CTS) {
// Re-Enable Tx
UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, ENABLE);
}
// Otherwise, Stop current transmission immediately
else{
// Disable Tx
UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, DISABLE);
}
}
#endif
}
// Receive Line Status
if (tmp == UART_IIR_INTID_RLS){
// Check line status
tmp1 = UART_GetLineStatus((LPC_UART_TypeDef *)LPC_UART1);
// Mask out the Receive Ready and Transmit Holding empty status
tmp1 &= (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE \
| UART_LSR_BI | UART_LSR_RXFE);
// If any error exist
if (tmp1) {
UART1_IntErr(tmp1);
}
}
// Receive Data Available or Character time-out
if ((tmp == UART_IIR_INTID_RDA) || (tmp == UART_IIR_INTID_CTI)){
UART1_IntReceive();
}
// Transmit Holding Empty
if (tmp == UART_IIR_INTID_THRE){
UART1_IntTransmit();
}
}
/* Auto flow control does work, but it turns the serial write functions into
* blocking functions, which drags USB down. Instead we handle it manually so we
* can make them asynchronous and let USB run at full speed.
*/
void configureFlowControl() {
if (UART_FullModemGetStatus(LPC_UART1) & UART1_MODEM_STAT_CTS) {
// Enable UART Transmit
UART_TxCmd(UART1_DEVICE, ENABLE);
}
// Enable Modem status interrupt
UART_IntConfig(UART1_DEVICE, UART1_INTCFG_MS, ENABLE);
// Enable CTS1 signal transition interrupt
UART_IntConfig(UART1_DEVICE, UART1_INTCFG_CTS, ENABLE);
resumeReceive();
}
/*********************************************************************//**
* @brief Main UART testing example sub-routine
* Print welcome screen first, then press any key to have it
* read in from the terminal and returned back to the terminal.
* - Press ESC to exit
* - Press 'r' to print welcome screen menu again
**********************************************************************/
int c_entry(void)
{
// UART Configuration structure variable
UART_CFG_Type UARTConfigStruct;
// UART FIFO configuration Struct variable
UART_FIFO_CFG_Type UARTFIFOConfigStruct;
// Pin configuration for UART0
PINSEL_CFG_Type PinCfg;
uint32_t idx, len;
__IO FlagStatus exitflag;
uint8_t buffer[10];
// DeInit NVIC and SCBNVIC
NVIC_DeInit();
NVIC_SCBDeInit();
/* Configure the NVIC Preemption Priority Bits:
* two (2) bits of preemption priority, six (6) bits of sub-priority.
* Since the Number of Bits used for Priority Levels is five (5), so the
* actual bit number of sub-priority is three (3)
*/
NVIC_SetPriorityGrouping(0x05);
// Set Vector table offset value
#if (__RAM_MODE__==1)
NVIC_SetVTOR(0x10000000);
#else
NVIC_SetVTOR(0x00000000);
#endif
/*
* Initialize UART1 pin connect
*/
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Portnum = 0;
for (idx = 15; idx <= 22; idx++){
PinCfg.Pinnum = idx;
PINSEL_ConfigPin(&PinCfg);
}
/* Initialize UART Configuration parameter structure to default state:
* Baudrate = 9600bps
* 8 data bit
* 1 Stop bit
* None parity
*/
UART_ConfigStructInit(&UARTConfigStruct);
// Initialize UART1 peripheral with given to corresponding parameter
UART_Init((LPC_UART_TypeDef *)LPC_UART1, &UARTConfigStruct);
/* Initialize FIFOConfigStruct to default state:
* - FIFO_DMAMode = DISABLE
* - FIFO_Level = UART_FIFO_TRGLEV0
* - FIFO_ResetRxBuf = ENABLE
* - FIFO_ResetTxBuf = ENABLE
* - FIFO_State = ENABLE
*/
UART_FIFOConfigStructInit(&UARTFIFOConfigStruct);
// Initialize FIFO for UART1 peripheral
UART_FIFOConfig((LPC_UART_TypeDef *)LPC_UART1, &UARTFIFOConfigStruct);
#if (AUTO_RTS_CTS_USE==0)
/*
* Determine current state of CTS pin to enable Tx
* activity
*/
if (UART_FullModemGetStatus(LPC_UART1) & UART1_MODEM_STAT_CTS) {
// Enable UART Transmit
UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, ENABLE);
}
#else
// Enable UART Transmit
UART_TxCmd((UART_TypeDef *)UART1, ENABLE);
#endif
// Reset ring buf head and tail idx
__BUF_RESET(rb.rx_head);
__BUF_RESET(rb.rx_tail);
__BUF_RESET(rb.tx_head);
__BUF_RESET(rb.tx_tail);
#if AUTO_RTS_CTS_USE
UART_FullModemConfigMode(UART1, UART1_MODEM_MODE_AUTO_RTS, ENABLE);
UART_FullModemConfigMode(UART1, UART1_MODEM_MODE_AUTO_CTS, ENABLE);
#else
// Enable Modem status interrupt
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART1_INTCFG_MS, ENABLE);
// Enable CTS1 signal transition interrupt
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART1_INTCFG_CTS, ENABLE);
// Modem Status interrupt call back
UART_SetupCbs((LPC_UART_TypeDef *)LPC_UART1, 4, (void *)UART1_ModemCallBack);
// Force RTS pin state to ACTIVE
UART_FullModemForcePinState(LPC_UART1, UART1_MODEM_PIN_RTS, ACTIVE);
//RESET RTS State flag
RTS_State = ACTIVE;
#endif
// Setup callback ---------------
// Receive callback
UART_SetupCbs((LPC_UART_TypeDef *)LPC_UART1, 0, (void *)UART1_IntReceive);
// Transmit callback
UART_SetupCbs((LPC_UART_TypeDef *)LPC_UART1, 1, (void *)UART1_IntTransmit);
// Line Status Error callback
UART_SetupCbs((LPC_UART_TypeDef *)LPC_UART1, 3, (void *)UART1_IntErr);
/* Enable UART Rx interrupt */
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RBR, ENABLE);
/* Enable UART line status interrupt */
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RLS, ENABLE);
/*
* Do not enable transmit interrupt here, since it is handled by
* UART_Send() function, just to reset Tx Interrupt state for the
* first time
*/
TxIntStat = RESET;
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(UART1_IRQn, ((0x01<<3)|0x01));
/* Enable Interrupt for UART1 channel */
NVIC_EnableIRQ(UART1_IRQn);
// print welcome screen
print_menu();
// reset exit flag
exitflag = RESET;
/* Read some data from the buffer */
while (exitflag == RESET)
{
len = 0;
while (len == 0)
{
len = UARTReceive((LPC_UART_TypeDef *)LPC_UART1, buffer, sizeof(buffer));
}
/* Got some data */
idx = 0;
while (idx < len)
{
if (buffer[idx] == 27)
{
/* ESC key, set exit flag */
UARTSend((LPC_UART_TypeDef *)LPC_UART1, menu3, sizeof(menu3));
exitflag = SET;
}
else if (buffer[idx] == 'r')
{
print_menu();
}
else
{
/* Echo it back */
UARTSend((LPC_UART_TypeDef *)LPC_UART1, &buffer[idx], 1);
}
idx++;
}
}
// wait for current transmission complete - THR must be empty
while (UART_CheckBusy((LPC_UART_TypeDef *)LPC_UART1) == SET);
// DeInitialize UART1 peripheral
UART_DeInit((LPC_UART_TypeDef *)LPC_UART1);
/* Loop forever */
while(1);
return 1;
}
/*********************************************************************//**
* @brief c_entry: Main UART-FULLMODEM program body
* @param[in] None
* @return int
**********************************************************************/
int c_entry(void)
{
// UART Configuration structure variable
UART_CFG_Type UARTConfigStruct;
// UART FIFO configuration Struct variable
UART_FIFO_CFG_Type UARTFIFOConfigStruct;
// Pin configuration for UART1
PINSEL_CFG_Type PinCfg;
uint32_t idx, len;
__IO FlagStatus exitflag;
uint8_t buffer[10];
/*
* Initialize UART1 pin connect
* If using MCB1700 eval board, assign pin P2.0 - P2.7
* If using IAR 1768 KS board, assign pin P0.7 - P0.15
*/
#ifdef MCB_LPC_1768
PinCfg.Funcnum = 2;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Portnum = 2;
for (idx = 0; idx <= 7; idx++){
PinCfg.Pinnum = idx;
PINSEL_ConfigPin(&PinCfg);
}
#elif defined(IAR_LPC_1768)
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Portnum = 0;
for (idx = 15; idx <= 22; idx++){
PinCfg.Pinnum = idx;
PINSEL_ConfigPin(&PinCfg);
}
#endif
/* Initialize UART Configuration parameter structure to default state:
* Baudrate = 9600bps
* 8 data bit
* 1 Stop bit
* None parity
*/
UART_ConfigStructInit(&UARTConfigStruct);
// Initialize UART1 peripheral with given to corresponding parameter
UART_Init((LPC_UART_TypeDef *)LPC_UART1, &UARTConfigStruct);
/* Initialize FIFOConfigStruct to default state:
* - FIFO_DMAMode = DISABLE
* - FIFO_Level = UART_FIFO_TRGLEV0
* - FIFO_ResetRxBuf = ENABLE
* - FIFO_ResetTxBuf = ENABLE
* - FIFO_State = ENABLE
*/
UART_FIFOConfigStructInit(&UARTFIFOConfigStruct);
// Initialize FIFO for UART1 peripheral
UART_FIFOConfig((LPC_UART_TypeDef *)LPC_UART1, &UARTFIFOConfigStruct);
#if (AUTO_RTS_CTS_USE==0)
/*
* Determine current state of CTS pin to enable Tx
* activity
*/
if (UART_FullModemGetStatus(LPC_UART1) & UART1_MODEM_STAT_CTS) {
// Enable UART Transmit
UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, ENABLE);
}
#else
// Enable UART Transmit
UART_TxCmd((LPC_UART_TypeDef *)LPC_UART1, ENABLE);
#endif
// Reset ring buf head and tail idx
__BUF_RESET(rb.rx_head);
__BUF_RESET(rb.rx_tail);
__BUF_RESET(rb.tx_head);
__BUF_RESET(rb.tx_tail);
#if AUTO_RTS_CTS_USE
UART_FullModemConfigMode(LPC_UART1, UART1_MODEM_MODE_AUTO_RTS, ENABLE);
UART_FullModemConfigMode(LPC_UART1, UART1_MODEM_MODE_AUTO_CTS, ENABLE);
#else
// Enable Modem status interrupt
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART1_INTCFG_MS, ENABLE);
// Enable CTS1 signal transition interrupt
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART1_INTCFG_CTS, ENABLE);
// Force RTS pin state to ACTIVE
UART_FullModemForcePinState(LPC_UART1, UART1_MODEM_PIN_RTS, ACTIVE);
//RESET RTS State flag
RTS_State = ACTIVE;
#endif
/* Enable UART Rx interrupt */
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RBR, ENABLE);
/* Enable UART line status interrupt */
UART_IntConfig((LPC_UART_TypeDef *)LPC_UART1, UART_INTCFG_RLS, ENABLE);
/*
* Do not enable transmit interrupt here, since it is handled by
* UART_Send() function, just to reset Tx Interrupt state for the
* first time
*/
TxIntStat = RESET;
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(UART1_IRQn, ((0x01<<3)|0x01));
/* Enable Interrupt for UART1 channel */
NVIC_EnableIRQ(UART1_IRQn);
// print welcome screen
print_menu();
// reset exit flag
exitflag = RESET;
/* Read some data from the buffer */
while (exitflag == RESET)
{
len = 0;
while (len == 0)
{
len = UARTReceive((LPC_UART_TypeDef *)LPC_UART1, buffer, sizeof(buffer));
}
/* Got some data */
idx = 0;
while (idx < len)
{
if (buffer[idx] == 27)
{
/* ESC key, set exit flag */
UARTSend((LPC_UART_TypeDef *)LPC_UART1, menu3, sizeof(menu3));
exitflag = SET;
}
else if (buffer[idx] == 'r')
{
print_menu();
}
else
{
/* Echo it back */
UARTSend((LPC_UART_TypeDef *)LPC_UART1, &buffer[idx], 1);
}
idx++;
}
}
// wait for current transmission complete - THR must be empty
while (UART_CheckBusy((LPC_UART_TypeDef *)LPC_UART1) == SET);
// DeInitialize UART1 peripheral
UART_DeInit((LPC_UART_TypeDef *)LPC_UART1);
/* Loop forever */
while(1);
return 1;
}
