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[demo_newlib] minor updates

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define max heap size via makefile
⚠️ define USER_FLAGS in console _before_ invoking make
This commit is contained in:
stnolting 2022-07-26 13:10:58 +02:00
parent 4eb170d594
commit 5dbb49d005
2 changed files with 9 additions and 6 deletions
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12
sw/example/demo_newlib/main.c
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@ -53,7 +53,7 @@
/**********************************************************************//**
* @name Max heap size (from linker script)
* @name Max heap size (from linker script's "__neorv32_heap_size")
**************************************************************************/
extern const unsigned __crt0_max_heap;
@ -90,7 +90,7 @@ int main() {
neorv32_uart0_printf("MAX heap size: %u bytes\n", max_heap);
}
else {
neorv32_uart0_printf("ERROR! No heap size defined (linker script -> '__heap_size')!\n");
neorv32_uart0_printf("ERROR! No heap size defined (linker script -> '__neorv32_heap_size')!\n");
return -1;
}
@ -104,7 +104,7 @@ int main() {
neorv32_uart0_printf("<rand> test... ");
srand(neorv32_cpu_csr_read(CSR_CYCLE)); // set random seed
neorv32_uart0_printf("%i, %i, %i, %i ", rand() % 100, rand() % 100, rand() % 100, rand() % 100);
neorv32_uart0_printf("%i, %i, %i, %i\n", rand() % 100, rand() % 100, rand() % 100, rand() % 100);
char *char_buffer; // pointer for dynamic memory allocation
@ -134,9 +134,9 @@ int main() {
free(char_buffer);
// NOTE: exit is highly oversized as it also includes clean-up functions (destructors), which
// is not required for bare-metal or RTOS applications... better use the simple 'return' or even better
// make sure main never returns. however, let's test that 'exit' works.
// 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("<exit> test...");
exit(0);

3
sw/example/demo_newlib/makefile
View file

@ -34,6 +34,9 @@
# The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
#################################################################################################
# Configure max HEAP size
USER_FLAGS+="-Wl,--defsym,__neorv32_heap_size=1024"
# Modify this variable to fit your NEORV32 setup (neorv32 home folder)
NEORV32_HOME ?= ../../..