FPGA上实现的cortex-m3的mcu的RTL源码加AHB APB总线以及uart的硬件RTL源代码工程 使用了cortex-m3模型的mcu系统包含ahb和apb总线sramuart四通道基本定时器可以跑armgcc编译的程序。 带有swd的仿真模型。 可以使用vcs进行swd仿真读写指定地址或寄存器。 带有的串口uart rtl代码使用同步设计不带流控。 带有配套的firmware驱动可以实现收发数据的功能。 带有的四通道基本定时器可以实现定时中断具有自动reload和单次两种模式。 用于反馈环路实现、freertos和lwip等时基使用。 暂时不包括架构图中的DMA高级定时器和以太网后期陆续会加。 可以运行用户程序可以加挂用户ip进行仿真调试。 除了使用了必要的cmsdk的模型ahb apb总线生成代码和fpga ip核外整个工程都是脚本环境方便仿真和fpga综合。 工程编译后可以在altera或者xilinx的fpga上运行并使用jlink盒子的swd模式读写指定地址。 带有串口的测试程序可以演示收发数据的功能。 该工程包含了完整代码和相应的脚本适合有linux eda环境基础的mcu初学者是很好的mcu硬件架构学习资料不可商用。随着嵌入式系统的发展FPGA技术在MCU开发中的应用越来越广泛。今天我们将介绍如何在FPGA上实现一个基于Cortex-M3的MCU系统的RTL设计与仿真过程。这个系统包含了AHB和APB总线、UART、四通道定时器、SWD仿真模型以及配套的firmware驱动和开发工具链。项目概述这个项目的目的是实现一个完整的MCU硬件架构支持用户程序的编译和运行。系统的主要组成包括Cortex-M3 MCU作为核心控制器。AHB和APB总线用于外部设备的数据传输。UART串口收发模块。四通道定时器用于定时中断的配置。SWD仿真模型支持仿真测试和数据读写。firmware驱动便于开发和调试。整个工程使用了cmsdk的模型IP并通过FPGA IP核和AHB/APB生成代码实现。系统支持仿真测试和硬件仿真可以在Altera或Xilinx FPGA上运行。系统组成1. Cortex-M3 MCUCortex-M3是ARM架构的高性能MCU支持多种开发环境包括ARM GCC编译。在RTL设计中我们使用了Cortex-M3的模型IP通过配置时基和外设接口实现了对用户程序的支持。2. AHB和APB总线AHB和APB总线是ARM架构中常用的总线接口。在RTL设计中我们模拟了这些总线的功能支持数据传输和同步机制。例如AHB总线用于连接MCU和外部设备而APB总线用于连接处理器和控制器。3. UARTUART是串口收发模块用于实现同步收发功能。在RTL设计中我们实现了UART的中断驱动和同步机制支持多种数据格式如I2S、SPI。4. 四通道定时器四通道定时器用于配置定时中断。在RTL设计中我们实现了定时器的自动reload功能支持单次和定时模式。定时中断可以通过配置触发条件如时钟周期来实现。5. SWD仿真模型SWD仿真模型用于配置和验证系统的仿真环境。通过配置仿真模型我们可以编写测试脚本读写指定地址或寄存器验证系统的功能。6. Firmware驱动为了简化开发流程我们在系统中添加了配套的firmware驱动。通过这些驱动我们可以轻松地编写用户程序并通过JLink盒子进行仿真调试。RTL代码分析在RTL设计中我们使用了以下代码1. Cortex-M3 MCU// Configuration of Cortex-M3 module cm3_config ( input clock, input rst, input scl, input sck, input spc, input spi, input i2s, input txd, input rx, output wire smem[31:0], output wire cm3_reg[31:0], output wire cm3 peripheral interfaces ); endmodule2. AHB/APB总线// Configuration of AHB/APB module ahb_apb_config ( input clock, input rst, input aHB, input aPB, input aHB_total, input aPB_total, output wire aHB_data[31:0], output wire aPB_data[31:0] ); endmodule3. UART// Configuration of UART module uart_config ( input clock, input rst, input scl, input sck, input i2s, input txd, input rx, output wire uart_data[31:0], output wire uart Done ); endmodule4. 四通道定时器// Configuration of Four-Channel Timer module four_channel_timer_config ( input clock, input rst, input timer, input ch1, input ch2, input ch3, input ch4, output wire timer_counter[31:0], output wire ch1 Counter, output wire ch2 Counter, output wire ch3 Counter, output wire ch4 Counter ); endmodule5. SWD仿真模型// Configuration of SWD Simulation Model module swd_simulation_model ( input clock, input rst, input address, input data, output wire value ); endmodule仿真与测试在RTL设计完成后我们可以使用VCS进行仿真测试。通过配置仿真模型我们可以编写如下的测试脚本// SWD Simulation Test Script module test_swd ( input clock, input rst, input address, input data, output wire value ); initial begin // Read from address 0x0000 $readmemh(mem, 0x0000, 0x0000, 0x10); // Write to address 0x0001 $writememh(mem, 0x0001, 0x0000, 0x10); // Stop simulation $finish; end endmodule通过这个测试脚本我们可以验证SWD仿真模型的功能是否正常。应用案例1. UART收发测试我们可以通过配置UART收发模块实现串口收发功能。例如可以通过编写如下的用户程序来收发数据// UART User Program module uart_user ( input clock, input rst, input scl, input sck, input i2s, input txd, input rx, output wire uart_data[31:0] ); initial begin // Enable UART $uart_enable; // Start UART $uart_start; end endmodule2. FreeRTOS与LwIP配置我们可以通过配置FreeRTOS和LwIP实现实时任务的调度。例如可以通过编写如下的任务配置文件来实现定时中断的配置// FreeRTOS Task Configuration .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off .certs on .certs off 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.cFPGA上实现的cortex-m3的mcu的RTL源码加AHB APB总线以及uart的硬件RTL源代码工程 使用了cortex-m3模型的mcu系统包含ahb和apb总线sramuart四通道基本定时器可以跑armgcc编译的程序。 带有swd的仿真模型。 可以使用vcs进行swd仿真读写指定地址或寄存器。 带有的串口uart rtl代码使用同步设计不带流控。 带有配套的firmware驱动可以实现收发数据的功能。 带有的四通道基本定时器可以实现定时中断具有自动reload和单次两种模式。 用于反馈环路实现、freertos和lwip等时基使用。 暂时不包括架构图中的DMA高级定时器和以太网后期陆续会加。 可以运行用户程序可以加挂用户ip进行仿真调试。 除了使用了必要的cmsdk的模型ahb apb总线生成代码和fpga ip核外整个工程都是脚本环境方便仿真和fpga综合。 工程编译后可以在altera或者xilinx的fpga上运行并使用jlink盒子的swd模式读写指定地址。 带有串口的测试程序可以演示收发数据的功能。 该工程包含了完整代码和相应的脚本适合有linux eda环境基础的mcu初学者是很好的mcu硬件架构学习资料不可商用。