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mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_uart.c

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/**************************************************************************//**
* @file uart.c
* @version V1.00
* $Revision: 14 $
* $Date: 15/11/26 10:47a $
* @brief NUC472/NUC442 UART driver source file
*
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include "NUC472_442.h"
/*---------------------------------------------------------------------------------------------------------*/
/* Includes of local headers */
/*---------------------------------------------------------------------------------------------------------*/
/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver
@{
*/
/** @addtogroup NUC472_442_UART_Driver UART Driver
@{
*/
/** @addtogroup NUC472_442_UART_EXPORTED_FUNCTIONS UART Exported Functions
@{
*/
/**
* @brief The function is used to clear UART specified interrupt flag.
*
* @param[in] uart The base address of UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module..
*
* @return None
*/
void UART_ClearIntFlag(UART_T* uart , uint32_t u32InterruptFlag)
{
if(u32InterruptFlag & UART_INTSTS_RLSINT_Msk) { /* clear Receive Line Status Interrupt */
uart->FIFOSTS |= UART_FIFOSTS_BIF_Msk | UART_FIFOSTS_FEF_Msk | UART_FIFOSTS_PEF_Msk;
uart->FIFOSTS |= UART_FIFOSTS_ADDRDETF_Msk;
}
if(u32InterruptFlag & UART_INTSTS_MODEMINT_Msk) /* clear Modem Interrupt */
uart->MODEMSTS |= UART_MODEMSTS_CTSDETF_Msk;
if(u32InterruptFlag & UART_INTSTS_BUFERRINT_Msk) { /* clear Buffer Error Interrupt */
uart->FIFOSTS |= UART_FIFOSTS_RXOVIF_Msk | UART_FIFOSTS_TXOVIF_Msk;
}
if(u32InterruptFlag & UART_INTSTS_RXTOINT_Msk) /* clear Modem Interrupt */
uart->INTSTS |= UART_INTSTS_RXTOIF_Msk;
}
/**
* @brief The function is used to disable UART.
*
* @param[in] uart The base address of UART module.
*
* @return None
*/
void UART_Close(UART_T* uart)
{
uart->INTEN = 0;
}
/**
* @brief The function is used to disable UART auto flow control.
*
* @param[in] uart The base address of UART module.
*
* @return None
*/
void UART_DisableFlowCtrl(UART_T* uart)
{
uart->INTEN &= ~(UART_INTEN_ATORTSEN_Msk | UART_INTEN_ATOCTSEN_Msk);
}
/**
* @brief The function is used to disable UART specified interrupt and disable NVIC UART IRQ.
*
* @param[in] uart The base address of UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module.
* - \ref UART_INTEN_TOCNTEN_Msk : Rx Time Out interrupt
* - \ref UART_INTEN_WKCTSIEN_Msk : Wakeup interrupt
* - \ref UART_INTEN_BUFERRIEN_Msk : Buffer Error interrupt
* - \ref UART_INTEN_RXTOIEN_Msk : Rx time-out interrupt
* - \ref UART_INTEN_MODEMIEN_Msk : Modem interrupt
* - \ref UART_INTEN_RLSIEN_Msk : Rx Line status interrupt
* - \ref UART_INTEN_THREIEN_Msk : Tx empty interrupt
* - \ref UART_INTEN_RDAIEN_Msk : Rx ready interrupt
*
* @return None
*/
void UART_DisableInt(UART_T* uart, uint32_t u32InterruptFlag )
{
uart->INTEN &= ~ u32InterruptFlag;
}
/**
* @brief The function is used to Enable UART auto flow control.
*
* @param[in] uart The base address of UART module.
*
* @return None
*/
void UART_EnableFlowCtrl(UART_T* uart )
{
uart->MODEM |= UART_MODEM_RTSACTLV_Msk;
uart->MODEM &= ~UART_MODEM_RTS_Msk;
uart->MODEMSTS |= UART_MODEMSTS_CTSACTLV_Msk;
uart->INTEN |= UART_INTEN_ATORTSEN_Msk | UART_INTEN_ATOCTSEN_Msk;
}
/**
* @brief The function is used to enable UART specified interrupt and disable NVIC UART IRQ.
*
* @param[in] uart The base address of UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module:
* - \ref UART_INTEN_TOCNTEN_Msk : Rx Time Out interrupt
* - \ref UART_INTEN_WKCTSIEN_Msk : Wakeup interrupt
* - \ref UART_INTEN_BUFERRIEN_Msk : Buffer Error interrupt
* - \ref UART_INTEN_RXTOIEN_Msk : Rx time-out interrupt
* - \ref UART_INTEN_MODEMIEN_Msk : Modem interrupt
* - \ref UART_INTEN_RLSIEN_Msk : Rx Line status interrupt
* - \ref UART_INTEN_THREIEN_Msk : Tx empty interrupt
* - \ref UART_INTEN_RDAIEN_Msk : Rx ready interrupt
*
* @return None
*/
void UART_EnableInt(UART_T* uart, uint32_t u32InterruptFlag )
{
uart->INTEN |= u32InterruptFlag;
}
/**
* @brief This function use to enable UART function and set baud-rate.
*
* @param[in] uart The base address of UART module.
* @param[in] 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, __HIRC, __HIRC};
uint32_t u32Clk;
uint32_t u32Baud_Div;
u32ClkTbl[1] = CLK_GetPLLClockFreq();
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UARTSEL_Msk) >> CLK_CLKSEL1_UARTSEL_Pos;
uart->FUNCSEL = UART_FUNCSEL_UART;
uart->LINE = UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1;
uart->FIFO = UART_FIFO_RFITL_1BYTE | UART_FIFO_RTSTRGLV_1BYTE;
u32Clk = (u32ClkTbl[u8UartClkSrcSel]) / (((CLK->CLKDIV0 & CLK_CLKDIV0_UARTDIV_Msk) >> CLK_CLKDIV0_UARTDIV_Pos) + 1);
if(u32baudrate != 0) {
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32Clk, u32baudrate);
if(u32Baud_Div > 0xFFFF)
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32Clk, 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[in] uart The base address of UART module.
* @param[out] pu8RxBuf The buffer to receive the data of receive FIFO.
* @param[in] 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;
for(u32Count=0; u32Count < u32ReadBytes; u32Count++) {
if(uart->FIFOSTS & UART_FIFOSTS_RXEMPTY_Msk) { /* Check RX empty => failed */
return u32Count;
}
pu8RxBuf[u32Count] = uart->DAT; /* Get Data from UART RX */
}
return u32Count;
}
/**
* @brief This function use to config UART line setting.
*
* @param[in] uart The base address of UART module.
* @param[in] u32baudrate The register value of baudrate of UART module.
* if u32baudrate = 0, UART baudrate will not change.
* @param[in] u32data_width The data length of UART module. [ \ref UART_WORD_LEN_5 / \ref UART_WORD_LEN_6 / \ref UART_WORD_LEN_7 / \ref UART_WORD_LEN_8]
* @param[in] u32parity The parity setting (odd/even/none) of UART module. [ \ref UART_PARITY_NONE / \ref UART_PARITY_ODD /
* \ref UART_PARITY_EVEN / \ref UART_PARITY_MARK / \ref UART_PARITY_SPACE]
* @param[in] u32stop_bits The stop bit length (1/1.5/2 bit) of UART module. [ \ref UART_STOP_BIT_1 / \ref UART_STOP_BIT_1_5 / \ref 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, __HIRC, __HIRC};
uint32_t u32Clk;
uint32_t u32Baud_Div = 0;
u32ClkTbl[1] = CLK_GetPLLClockFreq();
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UARTSEL_Msk) >> CLK_CLKSEL1_UARTSEL_Pos;
u32Clk = (u32ClkTbl[u8UartClkSrcSel]) / (((CLK->CLKDIV0 & CLK_CLKDIV0_UARTDIV_Msk) >> CLK_CLKDIV0_UARTDIV_Pos) + 1);
if(u32baudrate != 0) {
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32Clk, u32baudrate);
if(u32Baud_Div > 0xFFFF)
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32Clk, u32baudrate));
else
uart->BAUD = (UART_BAUD_MODE2 | u32Baud_Div);
}
uart->LINE = u32data_width | u32parity | u32stop_bits;
}
/**
* @brief This function use to set Rx timeout count.
*
* @param[in] uart The base address of UART module.
* @param[in] u32TOC Rx timeout counter.
*
* @return None
*/
void UART_SetTimeoutCnt(UART_T* uart, uint32_t u32TOC)
{
uart->TOUT = (uart->TOUT & ~UART_TOUT_TOIC_Msk)| (u32TOC);
uart->INTEN |= UART_INTEN_TOCNTEN_Msk;
}
/**
* @brief The function is used to configure IrDA relative settings. It consists of TX or RX mode and baudrate.
*
* @param[in] uart The base address of UART module.
* @param[in] u32Buadrate The baudrate of UART module.
* @param[in] u32Direction The direction(transmit:1/receive:0) of UART module in IrDA mode.
*
* @return None
*/
void UART_SelectIrDAMode(UART_T* uart, uint32_t u32Buadrate, uint32_t u32Direction)
{
uint8_t u8UartClkSrcSel;
uint32_t u32ClkTbl[4] = {__HXT, 0, __HIRC, __HIRC};
uint32_t u32Clk;
u32ClkTbl[1] = CLK_GetPLLClockFreq();
u8UartClkSrcSel = (CLK->CLKSEL1 & CLK_CLKSEL1_UARTSEL_Msk) >> CLK_CLKSEL1_UARTSEL_Pos;
u32Clk = (u32ClkTbl[u8UartClkSrcSel]) / (((CLK->CLKDIV0 & CLK_CLKDIV0_UARTDIV_Msk) >> CLK_CLKDIV0_UARTDIV_Pos) + 1);
uart->BAUD = UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32Clk, u32Buadrate);
uart->IRDA &= ~UART_IRDA_TXINV_Msk;
uart->IRDA |= UART_IRDA_RXINV_Msk;
uart->IRDA = u32Direction ? uart->IRDA | UART_IRDA_TXEN_Msk : uart->IRDA &~ UART_IRDA_TXEN_Msk;
uart->FUNCSEL = (0x2 << UART_FUNCSEL_FUNCSEL_Pos);
}
/**
* @brief The function is used to set RS485 relative setting.
*
* @param[in] uart The base address of UART module.
* @param[in] u32Mode The operation mode( \ref UART_ALTCTL_RS485NMM_Msk / \ref UART_ALTCTL_RS485AUD_Msk / \ref UART_ALTCTL_RS485AAD_Msk).
* @param[in] u32Addr The RS485 address.
*
* @return None
*/
void UART_SelectRS485Mode(UART_T* uart, uint32_t u32Mode, uint32_t u32Addr)
{
uart->FUNCSEL = UART_FUNCSEL_RS485;
uart->ALTCTL = 0;
uart->ALTCTL |= u32Mode | (u32Addr << UART_ALTCTL_ADDRMV_Pos);
}
/**
* @brief The function is to write data into TX buffer to transmit data by UART.
*
* @param[in] uart The base address of UART module.
* @param[in] pu8TxBuf The buffer to send the data to UART transmission FIFO.
* @param[in] 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;
for(u32Count=0; u32Count != u32WriteBytes; u32Count++) {
if(uart->FIFOSTS & UART_FIFOSTS_TXFULL_Msk) { /* Wait Tx empty and Time-out manner */
return u32Count;
}
uart->DAT = pu8TxBuf[u32Count]; /* Send UART Data from buffer */
}
return u32Count;
}
/*@}*/ /* end of group NUC472_442_UART_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group NUC472_442_UART_Driver */
/*@}*/ /* end of group NUC472_442_Device_Driver */
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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