147 lines
7.2 KiB
C
147 lines
7.2 KiB
C
// #################################################################################################
|
|
// # << NEORV32 - Newlib Demo/Test Program >> #
|
|
// # ********************************************************************************************* #
|
|
// # BSD 3-Clause License #
|
|
// # #
|
|
// # Copyright (c) 2023, 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 demo_newlib/main.c
|
|
* @author Stephan Nolting
|
|
* @brief Demo/test program for NEORV32's newlib C standard library support.
|
|
**************************************************************************/
|
|
#include <neorv32.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
|
|
/**********************************************************************//**
|
|
* @name User configuration
|
|
**************************************************************************/
|
|
/**@{*/
|
|
/** UART BAUD rate */
|
|
#define BAUD_RATE 19200
|
|
/**@}*/
|
|
|
|
|
|
/**********************************************************************//**
|
|
* @name Max heap size (from linker script's "__neorv32_heap_size")
|
|
**************************************************************************/
|
|
extern char __crt0_max_heap[];
|
|
|
|
|
|
/**********************************************************************//**
|
|
* Main function: Check some of newlib's core functions.
|
|
*
|
|
* @note This program requires UART0.
|
|
*
|
|
* @return 0 if execution was successful
|
|
**************************************************************************/
|
|
int main() {
|
|
|
|
// setup NEORV32 runtime environment to keep us safe
|
|
// -> catch all traps and give debug information via UART0
|
|
neorv32_rte_setup();
|
|
|
|
// setup UART at default baud rate, no interrupts
|
|
neorv32_uart0_setup(BAUD_RATE, 0);
|
|
|
|
// check if UART0 is implemented at all
|
|
if (neorv32_uart0_available() == 0) {
|
|
neorv32_uart0_printf("Error! UART0 not synthesized!\n");
|
|
return 1;
|
|
}
|
|
|
|
|
|
// say hello
|
|
neorv32_uart0_printf("<<< Newlib demo/test program >>>\n\n");
|
|
|
|
// heap size definition
|
|
volatile uint32_t max_heap = (uint32_t)__crt0_max_heap;
|
|
if (max_heap > 0){
|
|
neorv32_uart0_printf("MAX heap size: %u bytes\n", max_heap);
|
|
}
|
|
else {
|
|
neorv32_uart0_printf("ERROR! No heap size defined (USER_FLAGS+='-Wl,--defsym,__neorv32_heap_size=1024')!\n");
|
|
return -1;
|
|
}
|
|
|
|
// check if newlib is really available
|
|
#ifndef __NEWLIB__
|
|
neorv32_uart0_printf("ERROR! Seems like the compiler toolchain does not support newlib...\n");
|
|
return -1;
|
|
#endif
|
|
|
|
neorv32_uart0_printf("newlib version %i.%i\n\n", (int32_t)__NEWLIB__, (int32_t)__NEWLIB_MINOR__);
|
|
|
|
neorv32_uart0_printf("<rand> test... ");
|
|
srand(neorv32_cpu_csr_read(CSR_CYCLE)); // set random seed
|
|
neorv32_uart0_printf("%i, %i, %i, %i\n", rand() % 100, rand() % 100, rand() % 100, rand() % 100);
|
|
|
|
|
|
char *char_buffer; // pointer for dynamic memory allocation
|
|
|
|
neorv32_uart0_printf("<malloc> test...\n");
|
|
char_buffer = (char *) malloc(4 * sizeof(char)); // 4 bytes
|
|
|
|
// do not test read & write in simulation as there would be no UART RX input
|
|
if (neorv32_cpu_csr_read(CSR_MXISA) & (1 << CSR_MXISA_IS_SIM)) {
|
|
neorv32_uart0_printf("Skipping <read> & <write> tests as this seems to be a simulation.\n");
|
|
}
|
|
else {
|
|
neorv32_uart0_printf("<read> test (waiting for 4 chars via UART0)... ");
|
|
read((int)STDIN_FILENO, char_buffer, 4 * sizeof(char)); // get 4 chars from "STDIN" (UART0.RX)
|
|
neorv32_uart0_printf("ok\n");
|
|
|
|
neorv32_uart0_printf("<write> test to 'STDOUT'... (outputting the chars you have send)\n");
|
|
write((int)STDOUT_FILENO, char_buffer, 4 * sizeof(char)); // send 4 chars to "STDOUT" (UART0.TX)
|
|
neorv32_uart0_printf("\nok\n");
|
|
|
|
neorv32_uart0_printf("<write> test to 'STDERR'... (outputting the chars you have send)\n");
|
|
write((int)STDERR_FILENO, char_buffer, 4 * sizeof(char)); // send 4 chars to "STDERR" (UART0.TX)
|
|
neorv32_uart0_printf("\nok\n");
|
|
}
|
|
|
|
neorv32_uart0_printf("<free> test...\n");
|
|
free(char_buffer);
|
|
|
|
|
|
// NOTE: exit is highly over-sized as it also includes clean-up functions (destructors), which
|
|
// are not required for bare-metal or RTOS applications... better use the simple 'return' or even better
|
|
// make sure main never returns. Anyway, let's check if 'exit' works.
|
|
neorv32_uart0_printf("terminating via <exit> ");
|
|
exit(0);
|
|
|
|
// should never be reached
|
|
neorv32_uart0_printf("failed!n");
|
|
return 0;
|
|
}
|