M058S的485主机模式通信

/****************************************************************************

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V3.00

 * $Revision: 3 $

 * $Date: 15/02/06 10:22a $

 * @brief

 *           Transmit and receive data in UART RS485 mode.

 *           This sample code needs to work with UART_RS485_Slave.

 * @note

 * Copyright (C) 2011 Nuvoton Technology Corp. All rights reserved.

 *

 ******************************************************************************/

#include <stdio.h>

#include "M058S.h"





#define PLL_CLOCK       50000000





#define RXBUFSIZE       128



#define MATCH_ADDRSS    0xC0

#define UNMATCH_ADDRSS  0xB1





/*---------------------------------------------------------------------------------------------------------*/

/* Define functions prototype                                                                              */

/*---------------------------------------------------------------------------------------------------------*/

extern char GetChar(void);

int32_t main(void);

void RS485_SendAddressByte(uint8_t u8data);

void RS485_SendDataByte(uint8_t *pu8TxBuf, uint32_t u32WriteBytes);

void RS485_9bitModeMaster(void);





/*---------------------------------------------------------------------------------------------------------*/

/*  RS485 Transmit Control  (Address Byte: Parity Bit =1 , Data Byte:Parity Bit =0)                        */

/*---------------------------------------------------------------------------------------------------------*/

void RS485_SendAddressByte(uint8_t u8data)

{

    /* Set UART parity as MARK and ship baud rate setting */

    UART_SetLine_Config(UART0, 0, UART_WORD_LEN_8, UART_PARITY_MARK, UART_STOP_BIT_1);



    /* Send data */

    UART_WRITE(UART0, u8data);



    /* Wait Tx empty */

    UART_WAIT_TX_EMPTY(UART0);

}



void RS485_SendDataByte(uint8_t *pu8TxBuf, uint32_t u32WriteBytes)

{

    /* Set UART parity as SPACE and ship baud rate setting */

    UART_SetLine_Config(UART0, 0, UART_WORD_LEN_8, UART_PARITY_SPACE, UART_STOP_BIT_1);



    /* Send data */

    UART_Write(UART0, pu8TxBuf, u32WriteBytes);

}



/*---------------------------------------------------------------------------------------------------------*/

/*  RS485 Transmit Test                                                                                    */

/*---------------------------------------------------------------------------------------------------------*/

void RS485_9bitModeMaster()

{

    int32_t i32;

    uint8_t g_u8SendData[RXBUFSIZE] = {0};



    printf("\n");

    printf("+-------------------------------------------------------------+\n");

    printf("|     Pin Configure                                           |\n");

    printf("+-------------------------------------------------------------+\n");

    printf("|     _______                                    _______      |\n");

    printf("|    |       |                                  |       |     |\n");

    printf("|    |Master |--- TXD(P3.1) <====> RXD(P3.0) ---| Slave |     |\n");

    printf("|    |       |--- RTS(P0.3) <====> RTS(P0.3) ---|       |     |\n");

    printf("|    |_______|                                  |_______|     |\n");

    printf("|                                                             |\n");

    printf("+-------------------------------------------------------------+\n");

    printf("|  Please enable semihosted to show messages on debug session.|\n");

    printf("|  Keil users must define DEBUG_ENABLE_SEMIHOST in both C/C++ |\n");

    printf("|  and Asm preprocessor symbols.                              |\n");

    printf("|  IAR users must define DEBUG_ENABLE_SEMIHOST in both C/C++  |\n");

    printf("|  Compiler and Assembler preprocessor symbols.               |\n");

    printf("+-------------------------------------------------------------+\n");



    /*

        The sample code is used to test RS485 9-bit mode and needs

        two Module test board to complete the test.

        Master:

            1.Set AUD mode and HW will control RTS pin. LEV_RTS is set to '0'.

            2.Master will send four different address with 10 bytes data to test Slave.

            3.Address bytes : the parity bit should be '1'. (Set UA_LCR = 0x2B)

            4.Data bytes : the parity bit should be '0'. (Set UA_LCR = 0x3B)

            5.RTS pin is low in idle state. When master is sending,

              RTS pin will be pull high.



        Slave:

            1.Set AAD and AUD mode firstly. LEV_RTS is set to '0'.

            2.The received byte, parity bit is '1' , is considered "ADDRESS".

            3.The received byte, parity bit is '0' , is considered "DATA".  (Default)

            4.AAD: The slave will ignore any data until ADDRESS match ADDR_MATCH value.

              When RLS and RDA interrupt is happened,it means the ADDRESS is received.

              Check if RS485_ADD_DETF is set and read UA_RBR to clear ADDRESS stored in rx_fifo.



              NMM: The slave will ignore data byte until disable RX_DIS.

              When RLS and RDA interrupt is happened,it means the ADDRESS is received.

              Check the ADDRESS is match or not by user in UART_IRQHandler.

              If the ADDRESS is match,clear RX_DIS bit to receive data byte.

              If the ADDRESS is not match,set RX_DIS bit to avoid data byte stored in FIFO.

    */



    printf("\n");

    printf("+-------------------------------------------------------------+\n");

    printf("|            RS485  Function Test (9-bit Master)              |\n");

    printf("+-------------------------------------------------------------+\n");

    printf("| The function will send address with 128 data bytes to test  |\n");

    printf("| RS485 9-bit mode. Please connect TX/RX to another board and |\n");

    printf("| wait its ready to receive.                                  |\n");

    printf("| Press any key to start...                                   |\n");

    printf("+-------------------------------------------------------------+\n\n");

    GetChar();



    /* Set RS485-Master as AUD mode */

    /* Enable AUD mode to HW control RTS pin automatically */

    /* You also can use GPIO to control RTS pin for replacing AUD mode*/

    UART_SelectRS485Mode(UART0, UART_ALT_CSR_RS485_AUD_Msk, 0);



    /* Set RTS pin active level as high level active */

    UART0->MCR &= ~UART_MCR_LEV_RTS_Msk;

    UART0->MCR |= UART_RTS_IS_HIGH_LEV_ACTIVE;



    /* Set TX delay time */

    UART0->TOR = 0x2000;



    /* Prepare Data to transmit */

    for(i32 = 0; i32 < RXBUFSIZE; i32++)

    {

        g_u8SendData[i32] = i32 & 0xFF;

    }



    /* Send address and data for test */

    printf("Send Address 0x%x and data 0~127\n", MATCH_ADDRSS);

    RS485_SendAddressByte(MATCH_ADDRSS);

    RS485_SendDataByte(g_u8SendData, RXBUFSIZE);



    printf("Transfer Done\n");



}



void SYS_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/



    /* Enable Internal RC 22.1184MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);



    /* Waiting for Internal RC clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);



    /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));



    /* Enable external XTAL 12MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);



    /* Waiting for external XTAL clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);



    /* Set core clock as PLL_CLOCK from PLL */

    CLK_SetCoreClock(PLL_CLOCK);



    /* Enable UART module clock */

    CLK_EnableModuleClock(UART0_MODULE);



    /* Select UART module clock source */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));



    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/



    /* Set P3 multi-function pins for UART0 RXD and TXD */

    SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk);

    SYS->P3_MFP |= (SYS_MFP_P30_RXD | SYS_MFP_P31_TXD);



    /* Set P0 multi-function pins for UART0 RTS */

    SYS->P0_MFP = SYS->P0_MFP & (~SYS_MFP_P03_Msk) | SYS_MFP_P03_RTS;



}



void UART0_Init()

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init UART                                                                                               */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Reset UART0 */

    SYS_ResetModule(UART0_RST);



    /* Configure UART0 and set UART0 Baudrate */

    UART_Open(UART0, 115200);

}



/*---------------------------------------------------------------------------------------------------------*/

/* MAIN function                                                                                           */

/*---------------------------------------------------------------------------------------------------------*/

int main(void)

{

    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Init System, peripheral clock and multi-function I/O */

    SYS_Init();



    /* Lock protected registers */

    SYS_LockReg();



    /* Init UART0 for testing */

    UART0_Init();



    /*---------------------------------------------------------------------------------------------------------*/

    /* SAMPLE CODE                                                                                             */

    /*---------------------------------------------------------------------------------------------------------*/



    printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);



    printf("\n\nUART Sample Program\n");



    /* UART RS485 sample master function */

    RS485_9bitModeMaster();



    while(1);



}