92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
#include <_ansi.h>
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#include <_syslist.h>
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#include <errno.h>
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#include <sys/time.h>
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#include <sys/times.h>
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#include <retarget.h>
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#include <stdint.h>
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#if !defined(OS_USE_SEMIHOSTING)
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#define STDIN_FILENO 0
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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UART_HandleTypeDef *gHuart;
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void RetargetInit(UART_HandleTypeDef *huart)
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{
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gHuart = huart;
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/* Disable I/O buffering for STDOUT stream, so that
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* chars are sent out as soon as they are printed. */
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setvbuf(stdout, NULL, _IONBF, 0);
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}
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int _isatty(int fd)
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{
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if (fd >= STDIN_FILENO && fd <= STDERR_FILENO)
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return 1;
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errno = EBADF;
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return 0;
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}
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int _write(int fd, char *ptr, int len)
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{
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HAL_StatusTypeDef hstatus;
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if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
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{
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hstatus = HAL_UART_Transmit(gHuart, (uint8_t *) ptr, len, HAL_MAX_DELAY);
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if (hstatus == HAL_OK)
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return len;
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else
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return EIO;
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}
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errno = EBADF;
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return -1;
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}
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int _close(int fd)
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{
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if (fd >= STDIN_FILENO && fd <= STDERR_FILENO)
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return 0;
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errno = EBADF;
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return -1;
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}
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int _lseek(int fd, int ptr, int dir)
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{
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(void) fd;
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(void) ptr;
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(void) dir;
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errno = EBADF;
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return -1;
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}
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int _read(int fd, char *ptr, int len)
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{
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HAL_StatusTypeDef hstatus;
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if (fd == STDIN_FILENO)
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{
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hstatus = HAL_UART_Receive(gHuart, (uint8_t *) ptr, 1, HAL_MAX_DELAY);
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if (hstatus == HAL_OK)
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return 1;
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else
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return EIO;
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}
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errno = EBADF;
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return -1;
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}
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int _fstat(int fd, struct stat *st)
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{
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if (fd >= STDIN_FILENO && fd <= STDERR_FILENO)
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{
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st->st_mode = S_IFCHR;
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return 0;
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}
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errno = EBADF;
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return 0;
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}
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#endif //#if !defined(OS_USE_SEMIHOSTING)
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