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/**************************************************************************//**
* @file uart.c
* @brief UART driver source file
*
* SPDX-License-Identifier: Apache-2.0
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include "NuMicro.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup UART_Driver UART Driver
@{
*/
/** @addtogroup UART_EXPORTED_FUNCTIONS UART Exported Functions
@{
*/
static void UART_GetSrcClkSetting(UART_T *uart, uint32_t *pu32ClkSrcFreq, uint32_t *pu32ClkDivNum);
/**
* @brief This function make UART module be ready to transfer.
* @param[in] pu32ClkSrcFreq will return UART source clock frequency(In HZ).
* @param[in] pu32ClkSrcFreq will return UART source clock frequency(In HZ).
* @param[in] pu32ClkDivNum will return UART source clock divider.
* @return None.
* @details
* 0: HXT
* 1: SYSCLK1
* 2: LXT
* 3: HIRC
* @note If u32BusClock = 0, DIVIDER setting will be set to the maximum value.
*/
static void UART_GetSrcClkSetting(UART_T *uart, uint32_t *pu32ClkSrcFreq, uint32_t *pu32ClkDivNum)
{
uint32_t u32UartClkSrcSel = 0u, u32UartClkDivNum = 0u;
uint32_t u32SrcClkFreq = 0u;
uint32_t u32UartPort;
if (uart == (UART_T *)UART16)
{
u32UartPort = 16;
}
else
{
u32UartPort = ((uint32_t)uart & 0xf0000) >> 16;
}
if (u32UartPort < 8)
{
u32UartClkSrcSel = ((CLK->CLKSEL2 >> (16 + u32UartPort * 2)) & 0x3ul);
if (u32UartPort < 4)
{
u32UartClkDivNum = ((CLK->CLKDIV1 >> ((u32UartPort + 4) * 4)) & 0xful);
}
else
{
u32UartClkDivNum = ((CLK->CLKDIV2 >> ((u32UartPort - 4) * 4)) & 0xful);
}
}
else if (u32UartPort <= 16)
{
u32UartClkSrcSel = ((CLK->CLKSEL3 >> ((u32UartPort - 8) * 2)) & 0x3ul);
if (u32UartPort < 12)
{
u32UartClkDivNum = ((CLK->CLKDIV2 >> ((u32UartPort - 4) * 4)) & 0xful);
}
else
{
u32UartClkDivNum = ((CLK->CLKDIV3 >> ((u32UartPort - 12) * 4)) & 0xful);
}
}
/* Get PLL clock frequency if UART clock source selection is PLL */
switch (u32UartClkSrcSel)
{
case 0u:
u32SrcClkFreq = __HXT;
break;
case 1u:
u32SrcClkFreq = CLK_GetSYSCLK1Freq(); //TODO
break;
default:
u32SrcClkFreq = 0;
break;
}
if (pu32ClkSrcFreq)
*pu32ClkSrcFreq = u32SrcClkFreq;
if (pu32ClkDivNum)
*pu32ClkDivNum = u32UartClkDivNum;
}
/**
* @brief Clear UART specified interrupt flag
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module.
* - \ref UART_INTSTS_WKIF_Msk : Wake-up interrupt
* - \ref UART_INTSTS_BUFEINT_Msk : Buffer Error interrupt
* - \ref UART_INTSTS_MODEMINT_Msk : Modem Status interrupt
* - \ref UART_INTSTS_RLSINT_Msk : Receive Line Status interrupt
*
* @return None
*
* @details The function is used to clear UART specified interrupt flag.
*/
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 Status Interrupt */
{
uart->MODEMSTS |= UART_MODEMSTS_CTSDETF_Msk;
}
else
{
}
if (u32InterruptFlag & UART_INTSTS_BUFEINT_Msk) /* Clear Buffer Error Interrupt */
{
uart->FIFOSTS = UART_FIFOSTS_RXOVIF_Msk | UART_FIFOSTS_TXOVIF_Msk;
}
if (u32InterruptFlag & UART_INTSTS_WKINT_Msk) /* Clear Wake-up Interrupt */
{
uart->WKSTS = UART_WKSTS_CTSWKF_Msk | UART_WKSTS_DATWKF_Msk |
UART_WKSTS_RFRTWKF_Msk | UART_WKSTS_RS485WKF_Msk |
UART_WKSTS_TOUTWKF_Msk;
}
}
/**
* @brief Disable UART interrupt
*
* @param[in] uart The pointer of the specified UART module.
*
* @return None
*
* @details The function is used to disable UART interrupt.
*/
void UART_Close(UART_T *uart)
{
uart->INTEN = 0ul;
}
/**
* @brief Disable UART auto flow control function
*
* @param[in] uart The pointer of the specified UART module.
*
* @return None
*
* @details The function is used to disable UART auto flow control.
*/
void UART_DisableFlowCtrl(UART_T *uart)
{
uart->INTEN &= ~(UART_INTEN_ATORTSEN_Msk | UART_INTEN_ATOCTSEN_Msk);
}
/**
* @brief Disable UART specified interrupt
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module.
* - \ref UART_INTEN_WKIEN_Msk : Wake-up interrupt
* - \ref UART_INTEN_BUFEIEN_Msk : Buffer Error interrupt
* - \ref UART_INTEN_RXTOIEN_Msk : Rx time-out interrupt
* - \ref UART_INTEN_MODEMIEN_Msk : Modem status interrupt
* - \ref UART_INTEN_RLSIEN_Msk : Receive Line status interrupt
* - \ref UART_INTEN_THREIEN_Msk : Tx empty interrupt
* - \ref UART_INTEN_RDAIEN_Msk : Rx ready interrupt *
*
* @return None
*
* @details The function is used to disable UART specified interrupt and disable NVIC UART IRQ.
*/
void UART_DisableInt(UART_T *uart, uint32_t u32InterruptFlag)
{
/* Disable UART specified interrupt */
UART_DISABLE_INT(uart, u32InterruptFlag);
}
/**
* @brief Enable UART auto flow control function
*
* @param[in] uart The pointer of the specified UART module.
*
* @return None
*
* @details The function is used to Enable UART auto flow control.
*/
void UART_EnableFlowCtrl(UART_T *uart)
{
/* Set RTS pin output is low level active */
uart->MODEM |= UART_MODEM_RTSACTLV_Msk;
/* Set CTS pin input is low level active */
uart->MODEMSTS |= UART_MODEMSTS_CTSACTLV_Msk;
/* Set RTS and CTS auto flow control enable */
uart->INTEN |= UART_INTEN_ATORTSEN_Msk | UART_INTEN_ATOCTSEN_Msk;
}
/**
* @brief The function is used to enable UART specified interrupt and enable NVIC UART IRQ.
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32InterruptFlag The specified interrupt of UART module:
* - \ref UART_INTEN_WKIEN_Msk : Wake-up interrupt
* - \ref UART_INTEN_BUFEIEN_Msk : Buffer Error interrupt
* - \ref UART_INTEN_RXTOIEN_Msk : Rx time-out interrupt
* - \ref UART_INTEN_MODEMIEN_Msk : Modem status interrupt
* - \ref UART_INTEN_RLSIEN_Msk : Receive Line status interrupt
* - \ref UART_INTEN_THREIEN_Msk : Tx empty interrupt
* - \ref UART_INTEN_RDAIEN_Msk : Rx ready interrupt *
*
* @return None
*
* @details The function is used to enable UART specified interrupt and enable NVIC UART IRQ.
*/
void UART_EnableInt(UART_T *uart, uint32_t u32InterruptFlag)
{
/* Enable UART specified interrupt */
UART_ENABLE_INT(uart, u32InterruptFlag);
}
/**
* @brief Open and set UART function
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32baudrate The baudrate of UART module.
*
* @return None
*
* @details This function use to enable UART function and set baud-rate.
*/
void UART_Open(UART_T *uart, uint32_t u32baudrate)
{
uint32_t u32UartSrcClkFreq = 0ul, u32UartClkDivNum = 0ul;
uint32_t u32Baud_Div = 0ul;
/* Select UART function */
uart->FUNCSEL = UART_FUNCSEL_UART;
/* Set UART line configuration */
uart->LINE = UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1;
/* Set UART Rx and RTS trigger level */
uart->FIFO &= ~(UART_FIFO_RFITL_Msk | UART_FIFO_RTSTRGLV_Msk);
/* Get Source clock frequency and its divider of curret setting */
UART_GetSrcClkSetting(uart, &u32UartSrcClkFreq, &u32UartClkDivNum);
/* Set UART baud rate */
if (u32baudrate != 0ul)
{
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32UartSrcClkFreq / (u32UartClkDivNum + 1ul), u32baudrate);
if (u32Baud_Div > 0xFFFFul)
{
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32UartSrcClkFreq / (u32UartClkDivNum + 1ul), u32baudrate));
}
else
{
uart->BAUD = (UART_BAUD_MODE2 | u32Baud_Div);
}
}
}
/**
* @brief Read UART data
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] 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
*
* @details The function is used to read Rx data from RX FIFO and the data will be stored in pu8RxBuf.
*/
uint32_t UART_Read(UART_T *uart, uint8_t pu8RxBuf[], uint32_t u32ReadBytes)
{
uint32_t u32Count, u32delayno;
uint32_t u32Exit = 0ul;
for (u32Count = 0ul; u32Count < u32ReadBytes; u32Count++)
{
u32delayno = 0ul;
while (uart->FIFOSTS & UART_FIFOSTS_RXEMPTY_Msk) /* Check RX empty => failed */
{
u32delayno++;
if (u32delayno >= 0x40000000ul)
{
u32Exit = 1ul;
break;
}
else
{
}
}
if (u32Exit == 1ul)
{
break;
}
else
{
pu8RxBuf[u32Count] = (uint8_t)uart->DAT; /* Get Data from UART RX */
}
}
return u32Count;
}
/**
* @brief Set UART line configuration
*
* @param[in] uart The pointer of the specified 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 (none/odd/even/mark/space) 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
*
* @details This function use to config UART line setting.
*/
void UART_SetLineConfig(UART_T *uart, uint32_t u32baudrate, uint32_t u32data_width, uint32_t u32parity, uint32_t u32stop_bits)
{
uint32_t u32UartSrcClkFreq = 0ul, u32UartClkDivNum = 0ul;
uint32_t u32Baud_Div = 0ul;
/* Get Source clock frequency and its divider of curret setting */
UART_GetSrcClkSetting(uart, &u32UartSrcClkFreq, &u32UartClkDivNum);
/* Set UART baud rate */
if (u32baudrate != 0ul)
{
u32Baud_Div = UART_BAUD_MODE2_DIVIDER(u32UartSrcClkFreq / (u32UartClkDivNum + 1ul), u32baudrate);
if (u32Baud_Div > 0xFFFFul)
{
uart->BAUD = (UART_BAUD_MODE0 | UART_BAUD_MODE0_DIVIDER(u32UartSrcClkFreq / (u32UartClkDivNum + 1ul), u32baudrate));
}
else
{
uart->BAUD = (UART_BAUD_MODE2 | u32Baud_Div);
}
}
/* Set UART line configuration */
uart->LINE = u32data_width | u32parity | u32stop_bits;
}
/**
* @brief Set Rx timeout count
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32TOC Rx timeout counter.
*
* @return None
*
* @details This function use to set Rx timeout count.
*/
void UART_SetTimeoutCnt(UART_T *uart, uint32_t u32TOC)
{
/* Set time-out interrupt comparator */
uart->TOUT = (uart->TOUT & ~UART_TOUT_TOIC_Msk) | (u32TOC);
/* Set time-out counter enable */
uart->INTEN |= UART_INTEN_TOCNTEN_Msk;
}
/**
* @brief Select and configure IrDA function
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32Buadrate The baudrate of UART module.
* @param[in] u32Direction The direction of UART module in IrDA mode:
* - \ref UART_IRDA_TXEN
* - \ref UART_IRDA_RXEN
*
* @return None
*
* @details The function is used to configure IrDA relative settings. It consists of TX or RX mode and baudrate.
*/
void UART_SelectIrDAMode(UART_T *uart, uint32_t u32Buadrate, uint32_t u32Direction)
{
uint32_t u32UartSrcClkFreq = 0ul, u32UartClkDivNum = 0ul;
uint32_t u32Baud_Div;
/* Select IrDA function mode */
uart->FUNCSEL = UART_FUNCSEL_IrDA;
/* Get Source clock frequency and its divider of curret setting */
UART_GetSrcClkSetting(uart, &u32UartSrcClkFreq, &u32UartClkDivNum);
/* Set UART IrDA baud rate in mode 0 */
if (u32Buadrate != 0ul)
{
u32Baud_Div = UART_BAUD_MODE0_DIVIDER(u32UartSrcClkFreq / (u32UartClkDivNum + 1ul), u32Buadrate);
if (u32Baud_Div < 0xFFFFul)
{
uart->BAUD = (UART_BAUD_MODE0 | u32Baud_Div);
}
else
{
}
}
/* Configure IrDA relative settings */
if (u32Direction == UART_IRDA_RXEN)
{
uart->IRDA |= UART_IRDA_RXINV_Msk; /*Rx signal is inverse*/
uart->IRDA &= ~UART_IRDA_TXEN_Msk;
}
else
{
uart->IRDA &= ~UART_IRDA_TXINV_Msk; /*Tx signal is not inverse*/
uart->IRDA |= UART_IRDA_TXEN_Msk;
}
}
/**
* @brief Select and configure RS485 function
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] u32Mode The operation mode(NMM/AUD/AAD).
* - \ref UART_ALTCTL_RS485NMM_Msk
* - \ref UART_ALTCTL_RS485AUD_Msk
* - \ref UART_ALTCTL_RS485AAD_Msk
* @param[in] u32Addr The RS485 address.
*
* @return None
*
* @details The function is used to set RS485 relative setting.
*/
void UART_SelectRS485Mode(UART_T *uart, uint32_t u32Mode, uint32_t u32Addr)
{
/* Select UART RS485 function mode */
uart->FUNCSEL = UART_FUNCSEL_RS485;
/* Set RS585 configuration */
uart->ALTCTL &= ~(UART_ALTCTL_RS485NMM_Msk | UART_ALTCTL_RS485AUD_Msk | UART_ALTCTL_RS485AAD_Msk | UART_ALTCTL_ADDRMV_Msk);
uart->ALTCTL |= (u32Mode | (u32Addr << UART_ALTCTL_ADDRMV_Pos));
}
/**
* @brief Write UART data
*
* @param[in] uart The pointer of the specified UART module.
* @param[in] pu8TxBuf The buffer to send the data to UART transmission FIFO.
* @param[out] u32WriteBytes The byte number of data.
*
* @return u32Count transfer byte count
*
* @details The function is to write data into TX buffer to transmit data by UART.
*/
uint32_t UART_Write(UART_T *uart, uint8_t pu8TxBuf[], uint32_t u32WriteBytes)
{
uint32_t u32Count, u32delayno;
uint32_t u32Exit = 0ul;
for (u32Count = 0ul; u32Count != u32WriteBytes; u32Count++)
{
u32delayno = 0ul;
while (uart->FIFOSTS & UART_FIFOSTS_TXFULL_Msk) /* Check Tx Full */
{
u32delayno++;
if (u32delayno >= 0x40000000ul)
{
u32Exit = 1ul;
break;
}
else
{
}
}
if (u32Exit == 1ul)
{
break;
}
else
{
uart->DAT = pu8TxBuf[u32Count]; /* Send UART Data from buffer */
}
}
return u32Count;
}
/*@}*/ /* end of group UART_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group UART_Driver */
/*@}*/ /* end of group Standard_Driver */
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