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Diff: targets/cmsis/TARGET_NUVOTON/TARGET_NUC472/StdDriver/nuc472_ps2.c
- Revision:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_NUVOTON/TARGET_NUC472/StdDriver/nuc472_ps2.c Fri Sep 02 15:07:44 2016 +0100 @@ -0,0 +1,183 @@ +/****************************************************************************** + * @file ps2.c + * @version V1.00 + * $Revision: 5 $ + * $Date: 14/10/03 11:59a $ + * @brief NUC472/NUC442 PS2 driver source file + * + * @note + * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved. +*****************************************************************************/ + +#include <stdio.h> +#include "NUC472_442.h" + +/*---------------------------------------------------------------------------------------------------------*/ +/* Includes of local headers */ +/*---------------------------------------------------------------------------------------------------------*/ +//#include "ps2.h" + + +/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver + @{ +*/ + +/** @addtogroup NUC472_442_PS2_Driver PS2 Driver + @{ +*/ + + +/** @addtogroup NUC472_442_PS2_EXPORTED_FUNCTIONS PS2 Exported Functions + @{ +*/ + + +/** + * @brief The function is used to enable PS2 specified interrupt. + * + * @param[in] u32Mask The specified interrupt of PS2 module: + * - \ref PS2_CTL_TXIEN_Msk : PS2 Tx interrupt + * - \ref PS2_CTL_RXIEN_Msk : PS2 Rx interrupt + * + * @return None + */ +void PS2_EnableInt(uint32_t u32Mask) +{ + PS2->CTL |= u32Mask; +} + +/** + * @brief The function is used to disable PS2 specified interrupt. + * + * @param[in] u32Mask The specified interrupt of PS2 module: + * - \ref PS2_CTL_TXIEN_Msk : PS2 Tx interrupt + * - \ref PS2_CTL_RXIEN_Msk : PS2 Rx interrupt + * + * @return None + */ +void PS2_DisableInt(uint32_t u32Mask) +{ + PS2->CTL &= ~u32Mask; +} + +/** + * @brief This function use to enable PS2 function and set one byte per trnasfer. + * + * @param None + * + * @return None + */ +void PS2_Open(void) +{ + /* Reset PS2 device */ + SYS->IPRST1 |= SYS_IPRST1_PS2RST_Msk; + SYS->IPRST1 &= ~SYS_IPRST1_PS2RST_Msk; + + /* Enable PS2 module */ + PS2->CTL |= PS2_CTL_PS2EN_Msk; + + /* Set One byte per trnasfer */ + PS2->CTL &= ~PS2_CTL_TXFDEPTH_Msk; + + /* Clear Tx FIFO */ + PS2->CTL |= PS2_CTL_CLRFIFO_Msk; + PS2->CTL &= (~PS2_CTL_CLRFIFO_Msk); +} + +/** + * @brief This function use to disable PS2 function. + * + * @param None + * + * @return None + */ +void PS2_Close(void) +{ + /* Enable PS2 module */ + PS2->CTL &= ~PS2_CTL_PS2EN_Msk; +} + +/** + * @brief This function use to read PS2 Rx data. + * + * @param None + * + * @return Rx data + */ +uint8_t PS2_Read(void) +{ + return (uint8_t)(PS2->RXDAT & PS2_RXDAT_DAT_Msk); +} + +/** + * @brief This function use to transmit PS2 data. + * + * @param[in] pu32Buf The buffer to send the data to PS2 transmission FIFO. + * @param[in] u32ByteCount The byte number of data. + * + * @return FALSE: transmit data time-out + * TRUE: transmit data successful + */ +int32_t PS2_Write(uint32_t *pu32Buf, uint32_t u32ByteCount) +{ + uint32_t u32TxFIFO_Depth = 16; + uint32_t u32delayno, txcnt, remainder; + uint8_t i=0; + + txcnt = u32ByteCount / u32TxFIFO_Depth; + + remainder = u32ByteCount % u32TxFIFO_Depth; + if(remainder) txcnt++; + + u32delayno = 0; + while (!(PS2->STATUS & PS2_STATUS_TXEMPTY_Msk)) { + u32delayno++; + if (u32delayno >= 0xF0000000) + return FALSE; // Time Out + } + + if(u32ByteCount >= u32TxFIFO_Depth)//Tx fifo is 16 bytes + PS2_SET_TX_BYTE_CNT(u32TxFIFO_Depth); + + do { + u32delayno = 0; + while (!(PS2->STATUS & PS2_STATUS_TXEMPTY_Msk)) { + u32delayno++; + if(u32delayno >= 0xF0000000) + return FALSE; // Time Out + } + + if((txcnt == 1) && (remainder != 0)) + PS2_SET_TX_BYTE_CNT(u32ByteCount); + + PS2->TXDAT0 = pu32Buf[i]; + PS2->TXDAT1 = pu32Buf[i+1]; + PS2->TXDAT2 = pu32Buf[i+2]; + PS2->TXDAT3 = pu32Buf[i+3]; + + i = i + 4; + + } while(--txcnt); + + u32delayno = 0; + while(!(PS2->STATUS & PS2_STATUS_TXEMPTY_Msk)) { + u32delayno++; + if(u32delayno >= 0xF0000000) + return FALSE; // Time Out + } + + return TRUE; + +} + + +/*@}*/ /* end of group NUC472_442_PS2_EXPORTED_FUNCTIONS */ + +/*@}*/ /* end of group NUC472_442_PS2_Driver */ + +/*@}*/ /* end of group NUC472_442_Device_Driver */ + +/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/ + + +