- /****************************************************************************
- * [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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