34 lines
709 B
C
34 lines
709 B
C
#include <stdint.h>
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#include <errno.h>
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#include "main.h"
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extern int _heap_start;
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extern int _heap_end;
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static void *_old_heap = &_heap_start;
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int _write(int handle, char *data, int size) {
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handle = handle;
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xilinx_uartlite_send(&soc_uart, (uint8_t *)data, size);
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return size;
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}
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void *_sbrk(int nbytes) {
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char *_old = _old_heap;
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if(&_heap_start == &_heap_end) {
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errno = -ENOMEM;
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return (void *)-1;
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}
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if((_old + nbytes) < (char *)&_heap_end) {
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_old += nbytes;
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} else {
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errno = -ENOMEM;
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return (void *)-1;
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}
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return _old_heap;
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}
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void _putchar(char character) {
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xilinx_uartlite_send(&soc_uart, (uint8_t *)&character, 0x01);
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} |