49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
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#include <errno.h>
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#include <sys/time.h>
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#include <target.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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#ifdef HAL
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UART_HandleTypeDef *gHuart;
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void RetargetInit(UART_HandleTypeDef *huart) {
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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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__attribute__((unused)) int _write(int fd, char *ptr, int len) {
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HAL_StatusTypeDef hstatus;
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if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
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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 _read(int fd, char *ptr, int len) {
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HAL_StatusTypeDef hstatus;
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if (fd == STDIN_FILENO) {
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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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#endif
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#endif //#if !defined(OS_USE_SEMIHOSTING)
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