/****************************************************************************
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 9 $
* $Date: 15/09/02 10:04a $
* @brief
* Show how to use auto baud rate detection function.
* This sample code needs to work with UART_AutoBaudRate_Slave.
* @note
* Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "M451Series.h"
#define PLLCTL_SETTING CLK_PLLCTL_72MHz_HXT
#define PLL_CLOCK 72000000
#define RXBUFSIZE 1024
/*---------------------------------------------------------------------------------------------------------*/
/* Define functions prototype */
/*---------------------------------------------------------------------------------------------------------*/
extern char GetChar(void);
int32_t main(void);
void AutoBaudRate_TestItem(void);
void AutoBaudRate_TxTest(void);
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable HIRC clock (Internal RC 22.1184MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
/* Wait for HIRC clock ready */
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
/* Select HCLK clock source as HIRC and and HCLK source divider as 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
/* Enable HXT clock (external XTAL 12MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
/* Wait for HXT clock ready */
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
/* Set core clock as PLL_CLOCK from PLL */
CLK_SetCoreClock(PLL_CLOCK);
/* Enable UART module clock */
CLK_EnableModuleClock(UART0_MODULE);
CLK_EnableModuleClock(UART1_MODULE);
/* Select UART module clock source as HIRC and UART module clock divider as 1 */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
CLK_SetModuleClock(UART1_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set PD multi-function pins for UART0 RXD(PD.0) and TXD(PD.1) */
SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD0MFP_Msk | SYS_GPD_MFPL_PD1MFP_Msk);
SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD0MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD);
/* Set PB multi-function pins for UART1 RXD(PB.2) and TXD(PB.3) */
SYS->GPB_MFPL &= ~(SYS_GPB_MFPL_PB2MFP_Msk | SYS_GPB_MFPL_PB3MFP_Msk);
SYS->GPB_MFPL |= (SYS_GPB_MFPL_PB2MFP_UART1_RXD | SYS_GPB_MFPL_PB3MFP_UART1_TXD);
}
void UART0_Init()
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART0 module */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 Baudrate */
UART_Open(UART0, 115200);
}
void UART1_Init()
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART1 module */
SYS_ResetModule(UART1_RST);
/* Configure UART1 and set UART1 Baudrate */
UART_Open(UART1, 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 printf */
UART0_Init();
/* Init UART1 for testing */
UART1_Init();
/*---------------------------------------------------------------------------------------------------------*/
/* SAMPLE CODE */
/*---------------------------------------------------------------------------------------------------------*/
printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);
printf("\nUART Sample Program\n");
/* UART auto baud rate sample master function */
AutoBaudRate_TxTest();
while(1);
}
/*---------------------------------------------------------------------------------------------------------*/
/* Auto Baud Rate Function Test Menu */
/*---------------------------------------------------------------------------------------------------------*/
void AutoBaudRate_TestItem()
{
printf("\n");
printf("+-----------------------------------------------------------+\n");
printf("| Auto Baud Rate Function Test (Master) |\n");
printf("+-----------------------------------------------------------+\n");
printf("| [1] baud rate 38400 bps |\n");
printf("| [2] baud rate 57600 bps |\n");
printf("| [3] baud rate 115200 bps |\n");
printf("| |\n");
printf("| Select baud rate and master will send 0x1 to slave ... |\n");
printf("+-----------------------------------------------------------+\n");
printf("| Quit - [ESC] |\n");
printf("+-----------------------------------------------------------+\n\n");
}
/*---------------------------------------------------------------------------------------------------------*/
/* Auto Baud Rate Function Tx Test */
/*---------------------------------------------------------------------------------------------------------*/
void AutoBaudRate_TxTest()
{
uint32_t u32Item;
printf("\n");
printf("+-----------------------------------------------------------+\n");
printf("| Pin Configure |\n");
printf("+-----------------------------------------------------------+\n");
printf("| ______ _____ |\n");
printf("| | | | | |\n");
printf("| |Master|--UART1_TXD(PB.3) <==> UART1_RXD(PB.2)--|Slave| |\n");
printf("| | | | | |\n");
printf("| |______| |_____| |\n");
printf("| |\n");
printf("+-----------------------------------------------------------+\n");
printf("\n");
printf("+-----------------------------------------------------------+\n");
printf("| Auto Baud Rate Function Test |\n");
printf("+-----------------------------------------------------------+\n");
printf("| Description : |\n");
printf("| The sample code needs two boards. One is Master and |\n");
printf("| the other is slave. Master will send input pattern |\n");
printf("| 0x1 with different baud rate. It can check if Slave |\n");
printf("| calculates correct baud rate. |\n");
printf("+-----------------------------------------------------------+\n");
do
{
AutoBaudRate_TestItem();
u32Item = getchar();
printf("%c\n", u32Item);
/* Set different baud rate */
switch(u32Item)
{
case '1':
UART1->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HIRC, 38400);
break;
case '2':
UART1->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HIRC, 57600);
break;
default:
UART1->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HIRC, 115200);
break;
}
/* Send input pattern 0x1 for auto baud rate detection bit length is 1-bit */
UART_WRITE(UART1, 0x1);
}
while(u32Item != 27);
}
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