###### tags: `火神板`

# 火神板(NuMaker_Valcano) / Keil IDE

#### 參考文章
* [【新唐 NuMaker-Volcano 评测】1、开箱及开发环境搭建](https://bbs.21ic.com/icview-3128418-1-1.html)
* [新唐火神板開箱實作（一）：NuMaker-Volcano與NuEclipse IDE入門篇](https://danchouzhou.blogspot.com/2021/03/numaker-volcanonueclipse-ide.html)
* [官方介紹](https://www.nuvoton.com/board/numaker-volcano/)
* [官方教學](https://www.nuvoton.com/board/numaker-volcano/?index=2)

## 本文開始

### Spec
* MCU: M0A23EC1AC
* [官方說明](https://www.nuvoton.com/products/microcontrollers/arm-cortex-m0-mcus/m0a23-series/m0a23ec1ac/)
* 賣點應該是耐高溫125度，所以叫火神
* 內建[CANBUS](https://zh.wikipedia.org/wiki/%E6%8E%A7%E5%88%B6%E5%99%A8%E5%8D%80%E5%9F%9F%E7%B6%B2%E8%B7%AF)，主打車用？

### 安裝開發環境
* 下載與安裝 [KEIL MDK Nuvoton edition M0 / M23](http://www2.keil.com/nuvoton/M0-M23)，輸入email等資料後，網頁上才會出現載點
* 下載與安裝 [Nuvoton Nu-Link Driver](https://www.nuvoton.com.cn/export/resource-files/Nu-Link_Keil_Driver_V3.07.7246r.zip)，要裝在與Keil一樣的位置，如 C:\Keil_v5
* [新唐-IDE & 驅動程式-下載頁面](https://www.nuvoton.com/tool-and-software/ide-and-compiler/)
* 下載與安裝 [開發板支援套裝軟體 (Board Support Package, BSP)](https://github.com/OpenNuvoton/M0A21BSP/archive/refs/heads/master.zip)
* [新唐-開發板支援套件 (BSP)-下載頁面](https://www.nuvoton.com/tool-and-software/bsp/)
* 建議所有東西都裝在同一個目錄，包含USB Driver
* 在Win10環境下正常安裝的情況

### 指撥開關
* 上傳程式到板子上時 (注意指撥開關)
* 需要用到UART0時 (注意指撥開關)

### Hello World
* 開啟範例程式 (若Keil安裝順利，點兩下就會自動以Keil開啟)
* 更新Nu-Link的韌體 (第一次才需要這個步驟)
:::danger
按下Settings後，請跟著指示操作，我沒有截到圖。
:::
* 編譯
* 上傳 (記得指撥開關)
* 用Putty查看結果 (記得指撥開關再撥回來)
* Baud Rate: 115200
* 每按一次板子上的按紐，會印一次Hello World

### Hello World Code (不用改)

/******************************************************************************
 * @file     main.c
 * @version  V1.00
 * @brief    A project template for M0A21 MCU.
 *
 * SPDX-License-Identifier: Apache-2.0
 * @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include "NuMicro.h"

void UART_Open(UART_T *uart, uint32_t u32baudrate);

void SYS_Init(void)
{
    /* Unlock protected registers */
    SYS_UnlockReg();

    /* Enable HIRC clock (Internal RC 48MHz) */
    CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);

    /* Wait for HIRC clock ready */
    CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);

    /* Select HCLK clock source as HIRC and HCLK source divider as 1 */
    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));

    /* Enable UART0 clock */
    CLK_EnableModuleClock(UART0_MODULE);

    /* Switch UART0 clock source to HIRC */
    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));

    /* Update System Core Clock */
    SystemCoreClockUpdate();

    /* Set PB multi-function pins for UART0 RXD=PB.6 and TXD=PB.4 */
    SYS->GPB_MFP1 = (SYS->GPB_MFP1 & ~(SYS_GPB_MFP1_PB4MFP_Msk | SYS_GPB_MFP1_PB6MFP_Msk)) |        \
                    (SYS_GPB_MFP1_PB4MFP_UART0_TXD | SYS_GPB_MFP1_PB6MFP_UART0_RXD);

    /* Lock protected registers */
    SYS_LockReg();
}

/*
 * This is a template project for M0A21 series MCU. Users could based on this project to create their
 * own application without worry about the IAR/Keil project settings.
 *
 * This template application uses external crystal as HCLK source and configures UART0 to print out
 * "Hello World", users may need to do extra system configuration based on their system design.
 */

int main()
{
    SYS_Init();

    /* Init UART0 to 115200-8n1 for print message */
    UART_Open(UART0, 115200);

    /* Connect UART to PC, and open a terminal tool to receive following message */
    printf("Hello World\n");

    /* Got no where to go, just loop forever */
    while(1);
}

/*** (C) COPYRIGHT 2017 Nuvoton Technology Corp. ***/