/*****************************************************************************
** Function name: UARTInit
**
** Descriptions: Initialize UART0 port, setup pin select,
** clock, parity, stop bits, FIFO, etc.
**
** parameters: UART baudrate
** Returned value: None
**
*****************************************************************************/
void UARTInit(uint32_t baudrate)
{
uint32_t Fdiv,Dval,Mval;
uint32_t regVal;
//UARTTxEmpty = 1;
UARTCount = 0;
NVIC_DisableIRQ(UART_IRQn);
LPC_IOCON->PIO1_6 &= ~0x07; /* UART I/O config */
LPC_IOCON->PIO1_6 |= 0x01; /* UART RXD */
LPC_IOCON->PIO1_7 &= ~0x07;
LPC_IOCON->PIO1_7 |= 0x01; /* UART TXD */
/* Enable UART clock */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<12);
LPC_SYSCON->UARTCLKDIV = 0x1; /* divided by 1 */
LPC_UART->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
regVal = LPC_SYSCON->UARTCLKDIV;
//Fdiv = ((SystemAHBFrequency/regVal)/16)/baudrate ; /*baud rate */
BaudRateCalculator(SystemCoreClock/regVal,baudrate,&Fdiv,&Dval,&Mval);
LPC_UART->DLM = Fdiv >> 8;
LPC_UART->DLL = Fdiv & 0xff;
LPC_UART->FDR = Mval << 4 | Dval;
LPC_UART->LCR = 0x03; /* DLAB = 0 */
LPC_UART->FCR = 0x07; /* Enable and reset TX and RX FIFO. */
/* Read to clear the line status. */
regVal = LPC_UART->LSR;
/* Ensure a clean start, no data in either TX or RX FIFO. */
while (( LPC_UART->LSR & (LSR_THRE|LSR_TEMT)) != (LSR_THRE|LSR_TEMT) );
while ( LPC_UART->LSR & LSR_RDR )
{
regVal = LPC_UART->RBR; /* Dump data from RX FIFO */
}
/* Enable the UART Interrupt */
NVIC_EnableIRQ(UART_IRQn);
#if TX_INTERRUPT
LPC_UART->IER = IER_RBR | IER_THRE | IER_RLS; /* Enable UART interrupt */
#else
LPC_UART->IER = IER_RBR | IER_RLS; /* Enable UART interrupt */
#endif
return;
}
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_Open(E_UART_PORT u32Port, STR_UART_T *sParam)
{
UART_T * tUART;
/*-----------------------------------------------------------------------------------------------------*/
/* Check UART port */
/*-----------------------------------------------------------------------------------------------------*/
if ((u32Port != UART_PORT0) &&
(u32Port != UART_PORT1) &&
(u32Port != UART_PORT2))
{
return E_DRVUART_ERR_PORT_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied parity */
/*-----------------------------------------------------------------------------------------------------*/
if ((sParam->u8cParity != DRVUART_PARITY_NONE) &&
(sParam->u8cParity != DRVUART_PARITY_EVEN) &&
(sParam->u8cParity != DRVUART_PARITY_ODD) &&
(sParam->u8cParity != DRVUART_PARITY_MARK) &&
(sParam->u8cParity != DRVUART_PARITY_SPACE))
{
return E_DRVUART_ERR_PARITY_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied number of data bits */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cDataBits != DRVUART_DATABITS_5) &&
(sParam->u8cDataBits != DRVUART_DATABITS_6) &&
(sParam->u8cDataBits != DRVUART_DATABITS_7) &&
(sParam->u8cDataBits != DRVUART_DATABITS_8))
{
return E_DRVUART_ERR_DATA_BITS_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied number of stop bits */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cStopBits != DRVUART_STOPBITS_1) &&
(sParam->u8cStopBits != DRVUART_STOPBITS_2) &&
(sParam->u8cStopBits != DRVUART_STOPBITS_1_5)
)
{
return E_DRVUART_ERR_STOP_BITS_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied nember of trigger level bytes */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cRxTriggerLevel != DRVUART_FIFO_1BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_4BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_8BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_14BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_30BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_46BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_62BYTES))
{
return E_DRVUART_ERR_TRIGGERLEVEL_INVALID;
}
if(u32Port == UART_PORT0)
{
/* Reset IP */
SYS->IPRSTC2.UART0_RST = 1;
SYS->IPRSTC2.UART0_RST = 0;
/* Enable UART clock */
SYSCLK->APBCLK.UART0_EN = 1;
}
else if(u32Port == UART_PORT1)
{
/* Reset IP */
SYS->IPRSTC2.UART1_RST = 1;
SYS->IPRSTC2.UART1_RST = 0;
/* Enable UART clock */
SYSCLK->APBCLK.UART1_EN = 1;
}
else
{
/* Reset IP */
SYS->IPRSTC2.UART2_RST = 1;
SYS->IPRSTC2.UART2_RST = 0;
/* Enable UART clock */
SYSCLK->APBCLK.UART2_EN = 1;
}
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
/* Tx FIFO Reset & Rx FIFO Reset & FIFO Mode Enable */
tUART->FCR.TFR =1;
tUART->FCR.RFR =1;
/* Set Rx Trigger Level */
tUART->FCR.RFITL = sParam->u8cRxTriggerLevel;
/* Set Parity & Data bits & Stop bits */
tUART->LCR.SPE =((sParam->u8cParity)&0x4)?1:0;
tUART->LCR.EPE =((sParam->u8cParity)&0x2)?1:0;
tUART->LCR.PBE =((sParam->u8cParity)&0x1)?1:0;
tUART->LCR.WLS =sParam->u8cDataBits;
tUART->LCR.NSB =sParam->u8cStopBits;
/* Set Time-Out */
tUART->TOR.TOIC =sParam->u8TimeOut;
/* Set BaudRate */
BaudRateCalculator(GetUartClk(), sParam->u32BaudRate, &tUART->BAUD);
return E_SUCCESS;
}
