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/**************************************************************************//**
* @file uart.c
* @version V3.00
* $Revision: 27 $
* $Date: 14/01/29 11:05a $
* @brief M051 series UART driver source file
*
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include "M051Series.h"
/** @addtogroup M051_Device_Driver M051 Device Driver
@{
*/
/** @addtogroup M051_UART_Driver UART Driver
@{
*/
/** @addtogroup M051_UART_EXPORTED_FUNCTIONS UART Exported Functions
@{
*/
/**
* @brief The function is used to clear UART specified interrupt flag.
*
* @param uart The base address of UART module.
* @param u32InterruptFlag The specified interrupt of UART module.
* - UART_ISR_LIN_RX_BREAK_INT_Msk : LIN bus interrupt
* - UART_ISR_BUF_ERR_INT_Msk : Buffer Error interrupt
* - UART_ISR_MODEM_INT_Msk : Modem interrupt
* - UART_ISR_RLS_INT_Msk : Rx Line status interrupt
*
* @return None
*/
void UART_ClearIntFlag(UART_T* uart , uint32_t u32InterruptFlag)
{
if(u32InterruptFlag & UART_ISR_RLS_INT_Msk) /* clear Receive Line Status Interrupt */
{
uart->FSR |= UART_FSR_BIF_Msk | UART_FSR_FEF_Msk | UART_FSR_FEF_Msk;
uart->FSR |= UART_FSR_RS485_ADD_DETF_Msk;
}
if(u32InterruptFlag & UART_ISR_MODEM_INT_Msk) /* clear Modem Interrupt */
uart->MSR |= UART_MSR_DCTSF_Msk;
if(u32InterruptFlag & UART_ISR_BUF_ERR_INT_Msk) /* clear Buffer Error Interrupt */
{
uart->FSR |= UART_FSR_RX_OVER_IF_Msk | UART_FSR_TX_OVER_IF_Msk;
}
if(u32InterruptFlag & UART_ISR_LIN_RX_BREAK_INT_Msk) /* clear LIN break Interrupt */
uart->ISR |= UART_ISR_LIN_RX_BREAK_IF_Msk;
}
/**
* @brief The function is used to disable UART.
*
* @param uart The base address of UART module.
*
* @return None
*/
void UART_Close(UART_T* uart)
{
uart->IER = 0;
}
/**
* @brief The function is used to disable UART auto flow control.
*
* @param uart The base address of UART module.
*
* @return None
*/
void UART_DisableFlowCtrl(UART_T* uart)
{
uart->IER &= ~(UART_IER_AUTO_RTS_EN_Msk | UART_IER_AUTO_CTS_EN_Msk);
}
/**
* @brief The function is used to disable UART specified interrupt and disable NVIC UART IRQ.
*
* @param uart The base address of UART module.
* @param u32InterruptFlag The specified interrupt of UART module.
* - UART_IER_LIN_RX_BRK_IEN_Msk : LIN bus interrupt
* - UART_IER_WAKE_EN_Msk : Wakeup interrupt
* - UART_IER_BUF_ERR_IEN_Msk : Buffer Error interrupt
* - UART_IER_RTO_IEN_Msk : Rx time-out interrupt
* - UART_IER_MODEM_IEN_Msk : Modem interrupt
* - UART_IER_RLS_IEN_Msk : Rx Line status interrupt
* - UART_IER_THRE_IEN_Msk : Tx empty interrupt
* - UART_IER_RDA_IEN_Msk : Rx ready interrupt
*
* @return None
*/
void UART_DisableInt(UART_T* uart, uint32_t u32InterruptFlag)
{
/* Disable UART specified interrupt */
UART_DISABLE_INT(uart, u32InterruptFlag);
/* Disable NVIC UART IRQ */
if(uart == UART0)
NVIC_DisableIRQ(UART0_IRQn);
else
NVIC_DisableIRQ(UART1_IRQn);
}
/**
* @brief The function is used to Enable UART auto flow control.
*
* @param uart The base address of UART module.
*
* @return None
*/
void UART_EnableFlowCtrl(UART_T* uart)
{
/* Set RTS pin output is low level active */
uart->MCR |= UART_MCR_LEV_RTS_Msk;
/* Set CTS pin input is low level active */
uart->MSR |= UART_MSR_LEV_CTS_Msk;
/* Set RTS and CTS auto flow control enable */
uart->IER |= UART_IER_AUTO_RTS_EN_Msk | UART_IER_AUTO_CTS_EN_Msk;
}
/**
* @brief The function is used to enable UART specified interrupt and enable NVIC UART IRQ.
*
* @param uart The base address of UART module.
* @param u32InterruptFlag The specified interrupt of UART module:
* - UART_IER_LIN_RX_BRK_IEN_Msk : LIN bus interrupt * - UART_IER_WAKE_EN_Msk : Wakeup interrupt
* - UART_IER_WAKE_EN_Msk : Wakeup interrupt
* - UART_IER_BUF_ERR_IEN_Msk : Buffer Error interrupt
* - UART_IER_RTO_IEN_Msk : Rx time-out interrupt
* - UART_IER_MODEM_IEN_Msk : Modem interrupt
* - UART_IER_RLS_IEN_Msk : Rx Line status interrupt
* - UART_IER_THRE_IEN_Msk : Tx empty interrupt
* - UART_IER_RDA_IEN_Msk : Rx ready interrupt
*
* @return None
*/
void UART_EnableInt(UART_T* uart, uint32_t u32InterruptFlag)
{
/* Enable UART specified interrupt */
UART_ENABLE_INT(uart, u32InterruptFlag);
/* Enable NVIC UART IRQ */
if(uart == UART0)
NVIC_EnableIRQ(UART0_IRQn);
else
NVIC_EnableIRQ(UART1_IRQn);
}
/**
* @brief This function use to enable UART function and set baud-rate.
*
* @param uart The base address of UART module.
* @param u32baudrate The baudrate of UART module.
*
* @return None
*/
void UART_Open(UART_T* uart, uint32_t u32baudrate)
{
uint8_t u8UartClkSrcSel;
uint32_t u32ClkTbl[4] = {__HXT, 0, 0, __HIRC};
uint32_t u32Baud_Div = 0;
/* Get UART clock source selection */
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UART_S_Msk) >> CLK_CLKSEL1_UART_S_Pos;
/* Select UART function */
uart->FUN_SEL = UART_FUNC_SEL_UART;
/* Set UART line configuration */
uart->LCR = UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1;
/* Set UART Rx and RTS trigger level */
uart->FCR &= ~(UART_FCR_RFITL_Msk | UART_FCR_RTS_TRI_LEV_Msk);
/* Get PLL clock frequency if UART clock source selection is PLL */
if(u8UartClkSrcSel == 1)
u32ClkTbl[u8UartClkSrcSel] = CLK_GetPLLClockFreq();
/* Set UART baud rate */
if(u32baudrate != 0)
{
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32ClkTbl[u8UartClkSrcSel], u32baudrate);
if(u32Baud_Div > 0xFFFF)
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32ClkTbl[u8UartClkSrcSel], u32baudrate));
else
uart->BAUD = (UART_BAUD_MODE2 | u32Baud_Div);
}
}
/**
* @brief The function is used to read Rx data from RX FIFO and the data will be stored in pu8RxBuf.
*
* @param uart The base address of UART module.
* @param pu8RxBuf The buffer to receive the data of receive FIFO.
* @param u32ReadBytes The the read bytes number of data.
*
* @return u32Count: Receive byte count
*
*/
uint32_t UART_Read(UART_T* uart, uint8_t *pu8RxBuf, uint32_t u32ReadBytes)
{
uint32_t u32Count, u32delayno;
for(u32Count = 0; u32Count < u32ReadBytes; u32Count++)
{
u32delayno = 0;
while(uart->FSR & UART_FSR_RX_EMPTY_Msk) /* Check RX empty => failed */
{
u32delayno++;
if(u32delayno >= 0x40000000)
return FALSE;
}
pu8RxBuf[u32Count] = uart->RBR; /* Get Data from UART RX */
}
return u32Count;
}
/**
* @brief This function use to config UART line setting.
*
* @param uart The base address of UART module.
* @param u32baudrate The register value of baudrate of UART module.
* If u32baudrate = 0, UART baudrate will not change.
* @param u32data_width The data length of UART module.
* - UART_WORD_LEN_5
* - UART_WORD_LEN_6
* - UART_WORD_LEN_7
* - UART_WORD_LEN_8
* @param u32parity The parity setting (none/odd/even/mark/space) of UART module.
* - UART_PARITY_NONE
* - UART_PARITY_ODD
* - UART_PARITY_EVEN
* - UART_PARITY_MARK
* - UART_PARITY_SPACE
* @param u32stop_bits The stop bit length (1/1.5/2 bit) of UART module.
* - UART_STOP_BIT_1
* - UART_STOP_BIT_1_1.5
* - UART_STOP_BIT_2
*
* @return None
*/
void UART_SetLine_Config(UART_T* uart, uint32_t u32baudrate, uint32_t u32data_width, uint32_t u32parity, uint32_t u32stop_bits)
{
uint8_t u8UartClkSrcSel;
uint32_t u32ClkTbl[4] = {__HXT, 0, 0, __HIRC};
uint32_t u32Baud_Div = 0;
/* Get UART clock source selection */
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UART_S_Msk) >> CLK_CLKSEL1_UART_S_Pos;
/* Get PLL clock frequency if UART clock source selection is PLL */
if(u8UartClkSrcSel == 1)
u32ClkTbl[u8UartClkSrcSel] = CLK_GetPLLClockFreq();
/* Set UART baud rate */
if(u32baudrate != 0)
{
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32ClkTbl[u8UartClkSrcSel], u32baudrate);
if(u32Baud_Div > 0xFFFF)
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32ClkTbl[u8UartClkSrcSel], u32baudrate));
else
uart->BAUD = (UART_BAUD_MODE2 | u32Baud_Div);
}
/* Set UART line configuration */
uart->LCR = u32data_width | u32parity | u32stop_bits;
}
/**
* @brief This function use to set Rx timeout count.
*
* @param uart The base address of UART module.
* @param u32TOC Rx timeout counter.
*
* @return None
*/
void UART_SetTimeoutCnt(UART_T* uart, uint32_t u32TOC)
{
/* Set time-out interrupt comparator */
uart->TOR = (uart->TOR & ~UART_TOR_TOIC_Msk) | (u32TOC);
/* Set time-out counter enable */
uart->IER |= UART_IER_TIME_OUT_EN_Msk;
}
/**
* @brief The function is used to configure IrDA relative settings. It consists of TX or RX mode and baudrate.
*
* @param uart The base address of UART module.
* @param u32Buadrate The baudrate of UART module.
* @param u32Direction The direction(transmit:1/receive:0) of UART module in IrDA mode.
*
* @return None
*/
/**
* @brief The function is used to configure IrDA relative settings. It consists of TX or RX mode and baudrate.
*
* @param uart The base address of UART module.
* @param u32Buadrate The baudrate of UART module.
* @param u32Direction The direction(transmit:1/receive:0) of UART module in IrDA mode:
* - UART_IRCR_TX_SELECT
* - UART_IRCR_RX_SELECT
*
* @return None
*/
void UART_SelectIrDAMode(UART_T* uart, uint32_t u32Buadrate, uint32_t u32Direction)
{
uint8_t u8UartClkSrcSel;
uint32_t u32ClkTbl[4] = {__HXT, 0, 0, __HIRC};
uint32_t u32Baud_Div;
/* Select IrDA function mode */
uart->FUN_SEL = UART_FUNC_SEL_IrDA;
/* Get UART clock source selection */
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UART_S_Msk) >> CLK_CLKSEL1_UART_S_Pos;
/* Get PLL clock frequency if UART clock source selection is PLL */
if(u8UartClkSrcSel == 1)
u32ClkTbl[u8UartClkSrcSel] = CLK_GetPLLClockFreq();
/* Set UART IrDA baud rate in mode 0 */
if(u32Buadrate != 0)
{
u32Baud_Div = UART_BAUD_MODE0_DIVIDER(u32ClkTbl[u8UartClkSrcSel], u32Buadrate);
if(u32Baud_Div < 0xFFFF)
uart->BAUD = (UART_BAUD_MODE0 | u32Baud_Div);
}
/* Configure IrDA relative settings */
if(u32Direction == UART_IRCR_TX_SELECT)
{
uart->IRCR &= ~UART_IRCR_INV_TX_Msk; //Tx signal is not inversed
uart->IRCR |= UART_IRCR_TX_SELECT_Msk;
}
else
{
uart->IRCR |= UART_IRCR_INV_RX_Msk; //Rx signal is inversed
uart->IRCR &= ~UART_IRCR_TX_SELECT_Msk;
}
}
/**
* @brief The function is used to set RS485 relative setting.
*
* @param uart The base address of UART module.
* @param u32Mode The operation mode(NMM/AUD/AAD).
* - UART_ALT_CSR_RS485_NMM_Msk
* - UART_ALT_CSR_RS485_AUD_Msk
* - UART_ALT_CSR_RS485_AAD_Msk
* @param u32Addr The RS485 address.
*
* @return None
*/
void UART_SelectRS485Mode(UART_T* uart, uint32_t u32Mode, uint32_t u32Addr)
{
/* Select UART RS485 function mode */
uart->FUN_SEL = UART_FUNC_SEL_RS485;
/* Set RS585 configuration */
uart->ALT_CSR &= ~(UART_ALT_CSR_RS485_NMM_Msk | UART_ALT_CSR_RS485_AUD_Msk | UART_ALT_CSR_RS485_AAD_Msk | UART_ALT_CSR_ADDR_MATCH_Msk);
uart->ALT_CSR |= (u32Mode | (u32Addr << UART_ALT_CSR_ADDR_MATCH_Pos));
}
/**
* @brief The function is used to set LIN relative setting.
*
* @param uart The base address of UART module.
* @param u32Mode The LIN direction :
* - UART_ALT_CSR_LIN_TX_EN_Msk
* - UART_ALT_CSR_LIN_RX_EN_Msk
* - (UART_ALT_CSR_LIN_TX_EN_Msk|UART_ALT_CSR_LIN_RX_EN_Msk)
* @param u32BreakLength The breakfield length is u32BreakLength+2.
*
* @return None
*/
void UART_SelectLINMode(UART_T* uart, uint32_t u32Mode, uint32_t u32BreakLength)
{
/* Select LIN function mode */
uart->FUN_SEL = UART_FUNC_SEL_LIN;
/* Select LIN function setting : Tx enable, Rx enable and break field length */
uart->ALT_CSR &= ~(UART_ALT_CSR_LIN_TX_EN_Msk | UART_ALT_CSR_LIN_TX_EN_Msk | UART_ALT_CSR_UA_LIN_BKFL_Msk);
uart->ALT_CSR |= (u32Mode | (u32BreakLength << UART_ALT_CSR_UA_LIN_BKFL_Pos));
}
/**
* @brief The function is to write data into TX buffer to transmit data by UART.
*
* @param uart The base address of UART module.
* @param pu8TxBuf The buffer to send the data to UART transmission FIFO.
* @param u32WriteBytes The byte number of data.
*
* @return u32Count: transfer byte count
*/
uint32_t UART_Write(UART_T* uart, uint8_t *pu8TxBuf, uint32_t u32WriteBytes)
{
uint32_t u32Count, u32delayno;
for(u32Count = 0; u32Count != u32WriteBytes; u32Count++)
{
u32delayno = 0;
while((uart->FSR & UART_FSR_TE_FLAG_Msk) == 0) /* Wait Tx empty and Time-out manner */
{
u32delayno++;
if(u32delayno >= 0x40000000)
return FALSE;
}
uart->THR = pu8TxBuf[u32Count]; /* Send UART Data from buffer */
}
return u32Count;
}
/*@}*/ /* end of group M051_UART_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group M051_UART_Driver */
/*@}*/ /* end of group M051_Device_Driver */
/*** (C) COPYRIGHT 2012 Nuvoton Technology Corp. ***/
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