/****************************************************************************
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 4 $
* $Date: 15/02/06 10:22a $
* @brief
* Transmit and receive data in UART RS485 mode.
* This sample code needs to work with UART_RS485_Master.
* @note
* Copyright (C) 2011 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "M058S.h"
#define PLL_CLOCK 50000000
#define RXBUFSIZE 128
#define IS_USE_RS485NMM 1 //1:Select NMM_Mode , 0:Select AAD_Mode
#define MATCH_ADDRSS 0xC0
/*---------------------------------------------------------------------------------------------------------*/
/* Define functions prototype */
/*---------------------------------------------------------------------------------------------------------*/
extern char GetChar(void);
int32_t main(void);
void RS485_HANDLE(void);
void RS485_9bitModeSlave(void);
volatile int32_t r_pointer = 0;
uint8_t g_u8RecData[RXBUFSIZE] = {0};
/*---------------------------------------------------------------------------------------------------------*/
/* ISR to handle UART Channel 0 interrupt event */
/*---------------------------------------------------------------------------------------------------------*/
void UART0_IRQHandler(void)
{
RS485_HANDLE();
}
/*---------------------------------------------------------------------------------------------------------*/
/* RS485 Callback function */
/*---------------------------------------------------------------------------------------------------------*/
void RS485_HANDLE()
{
volatile uint32_t addr = 0;
volatile uint32_t u32IntSts = UART0->ISR;
/* RLS INT & RDA INT */ //For RS485 Detect Address
if((u32IntSts & UART_ISR_RLS_INT_Msk) && (u32IntSts & UART_ISR_RDA_INT_Msk))
{
if(UART0->FSR & UART_FSR_RS485_ADD_DETF_Msk) /* ADD_IF, RS485 mode */
{
addr = UART0->RBR;
UART_RS485_CLEAR_ADDR_FLAG(UART0); /* clear ADD_IF flag */
#if (IS_USE_RS485NMM ==1) //RS485_NMM
/* if address match, enable RX to receive data, otherwise to disable RX */
/* In NMM mode, user can decide multi-address filter */
/* In AAD mode, only one address can set */
if(addr == MATCH_ADDRSS)
{
UART0->FCR &= ~ UART_FCR_RX_DIS_Msk; /* Enable RS485 RX */
}
else
{
UART0->FCR |= UART_FCR_RX_DIS_Msk; /* Disable RS485 RX */
UART0->FCR |= UART_FCR_RFR_Msk; /* Clear data from RX FIFO */
}
#endif
}
}
else if((u32IntSts & UART_ISR_RDA_INT_Msk) || (u32IntSts & UART_ISR_TOUT_INT_Msk)) /* Rx Ready or Time-out INT*/
{
/* Handle received data */
g_u8RecData[r_pointer++] = UART0->RBR;
}
else if(u32IntSts & UART_ISR_BUF_ERR_INT_Msk) /* Buffer Error INT */
{
printf("\nBuffer Error...\n");
UART_ClearIntFlag(UART0, UART_ISR_BUF_ERR_INT_Msk);
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* RS485 Receive Test (IS_USE_RS485NMM: 0:AAD 1:NMM) */
/*---------------------------------------------------------------------------------------------------------*/
void RS485_9bitModeSlave()
{
uint32_t i;
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");
printf("| RS485 Function Test (9-bit Slave) |\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.
*/
/* Set Data Format, Only need parity enable whenever parity ODD/EVEN */
UART_SetLine_Config(UART0, 0, UART_WORD_LEN_8, UART_PARITY_EVEN, UART_STOP_BIT_1);
/* Set RTS pin active level as high level active */
UART0->MCR &= ~UART_MCR_LEV_RTS_Msk;
UART0->MCR |= UART_RTS_IS_HIGH_LEV_ACTIVE;
#if(IS_USE_RS485NMM == 1)
printf("\n");
printf("+-------------------------------------------------------------+\n");
printf("| Normal Multidrop Operation Mode |\n");
printf("+-------------------------------------------------------------+\n");
printf("| The function is used to test 9-bit slave mode. |\n");
printf("| Only Address %x data can receive |\n", MATCH_ADDRSS);
printf("+-------------------------------------------------------------+\n");
/* Set RX_DIS enable before set RS485-NMM mode */
UART0->FCR |= UART_FCR_RX_DIS_Msk;
/* Set RS485-NMM Mode */
UART_SelectRS485Mode(UART0, UART_ALT_CSR_RS485_NMM_Msk | UART_ALT_CSR_RS485_AUD_Msk, 0);
/* Set RS485 address detection enable */
UART0->ALT_CSR |= UART_ALT_CSR_RS485_ADD_EN_Msk;
#else
printf("+-------------------------------------------------------------+\n");
printf("| The function is used to test 9-bit slave mode. |\n");
printf("| Auto Address Match Operation Mode |\n");
printf("+-------------------------------------------------------------+\n");
printf("|Only Address %x, data can receive |\n", MATCH_ADDRSS);
printf("+-------------------------------------------------------------+\n");
/* Set RS485-AAD Mode and address match is 0xC0 */
UART_SelectRS485Mode(UART0, UART_ALT_CSR_RS485_AAD_Msk | UART_ALT_CSR_RS485_AUD_Msk, MATCH_ADDRSS);
/* Set RS485 address detection enable */
UART0->ALT_CSR |= UART_ALT_CSR_RS485_ADD_EN_Msk;
#endif
/* Enable RDA\RLS\Time-out Interrupt */
UART_EnableInt(UART0, (UART_IER_RDA_IEN_Msk | UART_IER_RLS_IEN_Msk | UART_IER_RTO_IEN_Msk));
r_pointer = 0;
/* Check Rx empty, otherwise read Rx */
printf("Starting to recevice %d bytes data...\n", RXBUFSIZE);
while(r_pointer < RXBUFSIZE);
/* Compare Data */
for(i = 0; i < RXBUFSIZE; i++)
{
if(g_u8RecData[i] != (i & 0xFF))
{
printf("Compare Data Failed\n");
while(1);
}
}
printf("\n Receive OK & Check OK\n");
/* Flush Rx FIFO */
UART0->FCR |= UART_FCR_RFR_Msk;
/* Disable RDA\RLS\Time-out Interrupt */
UART_DisableInt(UART0, (UART_IER_RDA_IEN_Msk | UART_IER_RLS_IEN_Msk | UART_IER_RTO_IEN_Msk));
printf("\nEnd test\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 UART 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 */
/*---------------------------------------------------------------------------------------------------------*/
int32_t 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 slave function */
RS485_9bitModeSlave();
while(1);
}
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