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【简介】

感谢社区活动有机会试用MAX78000 FEATHER 的开发板，板卡相关介绍及资料可以从此链接获取，https://www.maximintegrated.com/en/products/ MAX78000FTHR 对应的板子特性如下

Benefits and Features

● Dual Core Ultra-Low-Power Microcontroller

• Arm Cortex-M4 Processor with FPU up to 100MHz

• 512KB Flash and 128KB SRAM

• Optimized Performance with 16KB Instruction Cache

• Optional Error Correction Code (ECC-SEC-DED) for SRAM

• 32-Bit RISC-V Coprocessor up to 60MHz

• Up to 52 General-Purpose I/O Pins

• 12-Bit Parallel Camera Interface

• One I2S Master/Slave for Digital Audio Interface

● Neural Network Accelerator

• Highly Optimized for Deep Convolutional Neural Networks

• 442k 8-Bit Weight Capacity with 1,2,4,8-Bit Weights

• Programmable Input Image Size up to 1024 x 1024 pixels

• Programmable Network Depth up to 64 Layers

• Programmable per Layer Network Channel Widths up to 1024 Channels

• 1 and 2 Dimensional Convolution Processing

• Streaming Mode

• Flexibility to Support Other Network Types,Including MLP and Recurrent Neural Networks

● Power Management Maximizes Operating Time for Battery Applications

• Integrated Single-Inductor Multiple-Output (SIMO) Switch-Mode Power Supply (SMPS)

• 2.0V to 3.6V SIMO Supply Voltage Range

• Dynamic Voltage Scaling Minimizes Active Core Power Consumption

• 22.2μA/MHz While Loop Execution at 3.0V from Cache (CM4 Only)

• Selectable SRAM Retention in Low-Power Modes with Real-Time Clock (RTC) Enabled

● Security and Integrity

• Available Secure Boot

• AES 128/192/256 Hardware Acceleration Engine

• True Random Number Generator (TRNG) Seed Generator

对应板MAX78000的功能框图如下

板卡资源信息如下：

下载板子的资源软件包后，我们运行 C:\MaximSDK\Tools\MSYS2\msys.bat  来运行MSYS2 环境来编译hello world demo 程序。

# cd /c/MaximSDK/Examples/MAX78000/Hello_World

在目录下执行 make  BOARD=FTHR_RevA 进行编译

编译后将程序下载到板子中，板子已经按照下述的代码运行

int main(void)
{
    int count = 0;

    printf("Hello World!\n");

    while (1) {
        LED_On(LED1);
        MXC_Delay(500000);
        LED_Off(LED1);
        MXC_Delay(500000);
        printf("count : %d\n", count++);
    }
}