69 lines
1.1 KiB
C
69 lines
1.1 KiB
C
#include <sys/errno.h>
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#include <sys/stat.h>
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#include "stx7105.h"
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#define CONSOLE_ASC ASC2
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#define HEAP_SIZE 0x10000
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extern char _end;
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static uint32_t s_heap_size = 0U;
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caddr_t _sbrk(int incr) {
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char *heap_base = &_end;
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caddr_t ret = heap_base + s_heap_size;
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if (s_heap_size + incr >= HEAP_SIZE) {
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return (void *)(-ENOMEM);
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}
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s_heap_size += incr;
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return ret;
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}
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int _write(int file, char *ptr, int len) {
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for (int i = 0; i < len; i++) {
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while (CONSOLE_ASC->STA & 1 << 9U) {
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// wait for TX FIFO slot.
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}
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CONSOLE_ASC->TX_BUF = ptr[i];
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}
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return len;
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}
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int _open(const char *name, int flags, int mode) {
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return -1;
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}
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int _read(int file, char *ptr, int len) {
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return 0;
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}
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int _lseek(int file, int ptr, int dir) {
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return 0;
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}
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int _close(int file) {
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return -1;
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}
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int _isatty(int file) {
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return -1;
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}
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pid_t _getpid(void) {
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return -1;
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}
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void _kill(int pid, int sig) {
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return;
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}
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int _fstat(int file, struct stat *st) {
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st->st_mode = S_IFCHR;
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return 0;
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}
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