github-mirrors/neorv32
1
0
Fork 0
mirror of https://github.com/stnolting/neorv32.git synced 2025-04-23 13:47:33 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Added tiny C++ demo that shows that constructors are called pre-main.

Browse source
This commit is contained in:
GideonZ 2022-05-21 09:11:11 +02:00
parent 3f4dafaafb
commit 4ccec18728
2 changed files with 147 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

107
sw/example/hello_cpp/main.cpp Normal file
View file

@ -0,0 +1,107 @@
// #################################################################################################
// # << NEORV32 - "Hello World" Demo Program >> #
// # ********************************************************************************************* #
// # BSD 3-Clause License #
// # #
// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
// # #
// # Redistribution and use in source and binary forms, with or without modification, are #
// # permitted provided that the following conditions are met: #
// # #
// # 1. Redistributions of source code must retain the above copyright notice, this list of #
// # conditions and the following disclaimer. #
// # #
// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
// # conditions and the following disclaimer in the documentation and/or other materials #
// # provided with the distribution. #
// # #
// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
// # endorse or promote products derived from this software without specific prior written #
// # permission. #
// # #
// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
// # OF THE POSSIBILITY OF SUCH DAMAGE. #
// # ********************************************************************************************* #
// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
// #################################################################################################
/**********************************************************************//**
* @file hello_cpp/main.cpp
* @author Gideon Zweijtzer
* @brief Simple 'hello world' type of demo with static C++ constructors
**************************************************************************/
#include <neorv32.h>
/**********************************************************************//**
* @name User configuration
**************************************************************************/
/**@{*/
/** UART BAUD rate */
#define BAUD_RATE 19200
/**@}*/
/**********************************************************************//**
* DemoClass: Just a simple C++ class that holds one constant and can
* be asked to print it.
*
* @note This class will only successfully reveal its ID if the
* constructors are called prior to the main function.
**************************************************************************/
class DemoClass
{
const int identity;
public:
DemoClass(int id) : identity(id) { }
void print_id(void)
{
// In order to demonstrate just how constructors are called pre-main,
// it is not necessary to use the C++ type streams to print something.
neorv32_uart0_printf("I am DemoClass with instance ID: %d\n", identity);
}
};
static DemoClass demo1(1);
static DemoClass demo2(2);
/**********************************************************************//**
* Main function; prints some fancy stuff via UART.
*
* @note This program requires the UART interface to be synthesized.
*
* @return 0 if execution was successful
**************************************************************************/
int main() {
// capture all exceptions and give debug info via UART
// this is not required, but keeps us safe
neorv32_rte_setup();
// init UART at default baud rate, no parity bits, ho hw flow control
neorv32_uart0_setup(BAUD_RATE, PARITY_NONE, FLOW_CONTROL_NONE);
// check available hardware extensions and compare with compiler flags
neorv32_rte_check_isa(0); // silent = 0 -> show message if isa mismatch
// print project logo via UART
neorv32_rte_print_logo();
// say hello
neorv32_uart0_print("Hello world! :)\n");
// print the IDs of the two statically declared instances of DemoClass
demo1.print_id();
demo2.print_id();
return 0;
}

40
sw/example/hello_cpp/makefile Normal file
View file

@ -0,0 +1,40 @@
#################################################################################################
# << NEORV32 - Application Makefile >> #
# ********************************************************************************************* #
# Make sure to add the RISC-V GCC compiler's bin folder to your PATH environment variable. #
# ********************************************************************************************* #
# BSD 3-Clause License #
# #
# Copyright (c) 2021, Stephan Nolting. All rights reserved. #
# #
# Redistribution and use in source and binary forms, with or without modification, are #
# permitted provided that the following conditions are met: #
# #
# 1. Redistributions of source code must retain the above copyright notice, this list of #
# conditions and the following disclaimer. #
# #
# 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
# conditions and the following disclaimer in the documentation and/or other materials #
# provided with the distribution. #
# #
# 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
# endorse or promote products derived from this software without specific prior written #
# permission. #
# #
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
# OF THE POSSIBILITY OF SUCH DAMAGE. #
# ********************************************************************************************* #
# The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
#################################################################################################
# Modify this variable to fit your NEORV32 setup (neorv32 home folder)
NEORV32_HOME ?= ../../..
include $(NEORV32_HOME)/sw/common/common.mk