Mouse code for the MacroRat
mbed-dev/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_ps2.c
- Committer:
- sahilmgandhi
- Date:
- 2017-06-03
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
File content as of revision 46:b156ef445742:
/****************************************************************************** * @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. ***/