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Diff: targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_scuart.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
diff -r 9a67f0b066fc -r 9398a535854b targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_scuart.c --- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_scuart.c Thu Dec 15 11:48:27 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,206 +0,0 @@ -/**************************************************************************//** - * @file scuart.c - * @version V1.00 - * $Revision: 6 $ - * $Date: 14/08/12 7:25p $ - * @brief NUC472/NUC442 Smartcard UART mode (SCUART) driver source file - * - * @note - * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved. -*****************************************************************************/ -#include "NUC472_442.h" - -/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver - @{ -*/ - -/** @addtogroup NUC472_442_SCUART_Driver SCUART Driver - @{ -*/ - - -/** @addtogroup NUC472_442_SCUART_EXPORTED_FUNCTIONS SCUART Exported Functions - @{ -*/ - -/** - * @brief The function is used to disable smartcard interface UART mode. - * @param sc The base address of smartcard module. - * @return None - */ -void SCUART_Close(SC_T* sc) -{ - sc->INTEN = 0; - sc->UARTCTL = 0; - sc->CTL = 0; - -} -/// @cond HIDDEN_SYMBOLS -/** - * @brief This function returns module clock of specified SC interface - * @param[in] sc The base address of smartcard module. - * @return Module clock of specified SC interface - */ -static uint32_t SCUART_GetClock(SC_T *sc) -{ - uint32_t u32ClkSrc, u32Num, u32Clk; - - if(sc == SC0) - u32Num = 0; - else if(sc == SC1) - u32Num = 1; - else if(sc == SC2) - u32Num = 2; - else if(sc == SC3) - u32Num = 3; - else if(sc == SC4) - u32Num = 4; - else - u32Num = 5; - - u32ClkSrc = (CLK->CLKSEL3 >> (2 * u32Num)) & CLK_CLKSEL3_SC0SEL_Msk; - - // Get smartcard module clock - if(u32ClkSrc == 0) - u32Clk = __HXT; - else if(u32ClkSrc == 1) - u32Clk = CLK_GetPLLClockFreq(); - else if(u32ClkSrc == 2) - u32Clk = CLK_GetPCLKFreq(); - else - u32Clk = __HIRC; - - if(u32Num < 4) { - u32Clk /= (((CLK->CLKDIV1 >> (8 * u32Num)) & CLK_CLKDIV1_SC0DIV_Msk) + 1); - } else { - u32Clk /= (((CLK->CLKDIV2 >> (8 * (u32Num - 4))) & CLK_CLKDIV2_SC4DIV_Msk) + 1); - } - - return u32Clk; -} - -/// @endcond HIDDEN_SYMBOLS - -/** - * @brief This function use to enable smartcard module UART mode and set baudrate. - * @param[in] sc The base address of smartcard module. - * @param[in] u32baudrate Target baudrate of smartcard module. - * @return Actual baudrate of smartcard mode - * @note This function configures character width to 8 bits, 1 stop bit, and no parity. - * And can use \ref SCUART_SetLineConfig function to update these settings - */ -uint32_t SCUART_Open(SC_T* sc, uint32_t u32baudrate) -{ - uint32_t u32Clk = SCUART_GetClock(sc), u32Div; - - // Calculate divider for target baudrate - u32Div = (u32Clk + (u32baudrate >> 1) - 1) / u32baudrate - 1; - - sc->CTL = SC_CTL_SCEN_Msk | SC_CTL_NSB_Msk; // Enable smartcard interface and stop bit = 1 - sc->UARTCTL = SCUART_CHAR_LEN_8 | SCUART_PARITY_NONE | SC_UARTCTL_UARTEN_Msk; // Enable UART mode, disable parity and 8 bit per character - sc->ETUCTL = u32Div; - - return(u32Clk / u32Div); -} - -/** - * @brief The function is used to read Rx data from RX FIFO. - * @param[in] sc The base address of smartcard module. - * @param[in] pu8RxBuf The buffer to store receive the data - * @param[in] u32ReadBytes Target number of characters to receive - * @return Actual character number reads to buffer - * @note This function does not block and return immediately if there's no data available - */ -uint32_t SCUART_Read(SC_T* sc, uint8_t *pu8RxBuf, uint32_t u32ReadBytes) -{ - uint32_t u32Count; - - for(u32Count = 0; u32Count < u32ReadBytes; u32Count++) { - if(SCUART_GET_RX_EMPTY(sc)) { // no data available - break; - } - pu8RxBuf[u32Count] = SCUART_READ(sc); // get data from FIFO - } - - return u32Count; -} - -/** - * @brief This function use to config smartcard UART mode line setting. - * @param[in] sc The base address of smartcard module. - * @param[in] u32Baudrate Target baudrate of smartcard module. If this value is 0, UART baudrate will not change. - * @param[in] u32DataWidth The data length, could be - * - \ref SCUART_CHAR_LEN_5 - * - \ref SCUART_CHAR_LEN_6 - * - \ref SCUART_CHAR_LEN_7 - * - \ref SCUART_CHAR_LEN_8 - * @param[in] u32Parity The parity setting, could be - * - \ref SCUART_PARITY_NONE - * - \ref SCUART_PARITY_ODD - * - \ref SCUART_PARITY_EVEN - * @param[in] u32StopBits The stop bit length, could be - * - \ref SCUART_STOP_BIT_1 - * - \ref SCUART_STOP_BIT_2 - * @return Actual baudrate of smartcard - */ -uint32_t SCUART_SetLineConfig(SC_T* sc, uint32_t u32Baudrate, uint32_t u32DataWidth, uint32_t u32Parity, uint32_t u32StopBits) -{ - - uint32_t u32Clk = SCUART_GetClock(sc), u32Div; - - if(u32Baudrate == 0) { // keep original baudrate setting - u32Div = sc->ETUCTL & SC_ETUCTL_ETURDIV_Msk; - } else { - // Calculate divider for target baudrate - u32Div = (u32Clk + (u32Baudrate >> 1) - 1)/ u32Baudrate - 1; - sc->ETUCTL = u32Div; - } - - sc->CTL = u32StopBits | SC_CTL_SCEN_Msk; // Set stop bit - sc->UARTCTL = u32Parity | u32StopBits | SC_UARTCTL_UARTEN_Msk; // Set character width and parity - - return(u32Clk / u32Div); -} - -/** - * @brief This function use to set receive timeout count. - * @param[in] sc The base address of smartcard module. - * @param[in] u32TOC Rx timeout counter, using baudrate as counter unit. Valid range are 0~0x1FF, - * set this value to 0 will disable timeout counter - * @return None - * @details The time-out counter resets and starts counting whenever the RX buffer received a - * new data word. Once the counter decrease to 1 and no new data is received or CPU - * does not read any data from FIFO, a receiver time-out interrupt will be generated. - */ -void SCUART_SetTimeoutCnt(SC_T* sc, uint32_t u32TOC) -{ - sc->RXTOUT= u32TOC; -} - - -/** - * @brief This function is to write data into transmit FIFO to send data out. - * @param[in] sc The base address of smartcard module. - * @param[in] pu8TxBuf The buffer containing data to send to transmit FIFO. - * @param[in] u32WriteBytes Number of data to send. - * @return None - * @note This function blocks until all data write into FIFO - */ -void SCUART_Write(SC_T* sc,uint8_t *pu8TxBuf, uint32_t u32WriteBytes) -{ - uint32_t u32Count; - - for(u32Count = 0; u32Count != u32WriteBytes; u32Count++) { - while(SCUART_GET_TX_FULL(sc)); // Wait 'til FIFO not full - sc->DAT = pu8TxBuf[u32Count]; // Write 1 byte to FIFO - } -} - - -/*@}*/ /* end of group NUC472_442_SCUART_EXPORTED_FUNCTIONS */ - -/*@}*/ /* end of group NUC472_442_SCUART_Driver */ - -/*@}*/ /* end of group NUC472_442_Device_Driver */ - -/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/