[经验]

新唐ARM mbed平台

李咏琪

2019-9-18 09:05:16

2398 ARM 物联网

ARM® mbed™ 物联网设备平台基于ARM微处理器，能够最短的时间创建支持商用与互操作的互联物联网设备，同时跨细分市场的节点与云服务之间的互操作性可最大限度发挥物联网的潜力。

1.新唐ARM® mbed™ 平台页面

https://developer.mbed.org/platforms/Nuvoton-M453/
https://developer.mbed.org/platforms/Nuvoton-NUC472/

2.新唐ARM® mbed™ 特色

微控制器以Cortex®-M4为核心
Flash/SRAM: M453 256KB/32KB，NUC472 512KB/1MB
支持Arduino接脚
支持CAN、RS485、USB.NUC472支持Ethernet
提供三轴加速度计与三轴陀螺仪
以扩充板支持Wi-Fi，Bluetooth，802.15.4，Thread等.

3.NuMaker-PFM-NUC472 Components

Main Chip: NUC472JI8AE
Core
Arm® Cortex®-M4F core running up to 84 MHz
Supports DSP extension and FPU
Memory
512 Kbytes Flash memory
64 Kbytes embedded SRAM
Peripherals
SPI (x4), I2C (x5), I2S (x2), UART (x6)
PWM (x16), GPIO (x114), CAN (x2)
USB OTG / Host / Device
Smart Card (x6), SDIO, Ethernet MAC, Crypto
ADC (2x16-ch), OP (x2), Comparator (x3)
Others
Nu-Link-Me ICE bridge
1 Mbytes SRAM
3-axis Accelerometer and Gyroscope (MPU6500)
Audio Codec (NAU8822LYG)
RS232, RS485, CAN Transceivers
Ethernet
MicroSD Card socket
Buttons (x2)
Buzzer
RGB LED, Battery

4.NuMaker-PFM-NUC472 Pin-out

5.程序示例
Example: SD File System
•Access file system backed by SD card in SD bus mode
•Follow file system/block device introduced with Mbed OS 5.4
-NuMaker-mbed-SD-FileSystem-example (new)
-NuMaker-mbed-SDFileSystem-example (deprecated)

•Support target
-NuMaker-PFM-NUC472
-NuMaker-PFM-M453
•New program à Choose Template “NuMaker SD-File-System with SD mode”

Example: SD File System

// SD block device

NuSDBlockDevice bd;

// FAT file system mounted on path “/fs”

FATFileSystem fs("fs");
int main() {

  // Optional: Format SD card to FAT file system

  FATFileSystem::format(&bd);

  // Mount the SD card on “/fs” path

  fs.mount(&bd);

  // Open “/fs/test.txt” for write

  FILE* fd = fopen("/fs/test.txt", "w");

  // Write to “/fs/test.txt”

  fprintf(fd, “Hello file systemn");

  // Close “/fs/test.txt”

  fclose(fd);

  ... ...