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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,32 @@ | ||
| // All credit to Carmine Noviello for this code | ||
| // https://github.com/cnoviello/mastering-stm32/blob/master/nucleo-f030R8/system/include/retarget/retarget.h | ||
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| #ifndef _RETARGET_H__ | ||
| #define _RETARGET_H__ | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| #include "stm32f4xx_hal.h" | ||
| #include <sys/stat.h> | ||
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| void RetargetInit(UART_HandleTypeDef *huart); | ||
| int _isatty(int fd); | ||
| int _write(int fd, char* ptr, int len); | ||
| int _close(int fd); | ||
| int _lseek(int fd, int ptr, int dir); | ||
| int _read(int fd, char* ptr, int len); | ||
| int _fstat(int fd, struct stat* st); | ||
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| // These three functions must be implemented when enabling printf with foating point values | ||
| int _kill(int pid, int sig); | ||
| int _getpid(); | ||
| void _exit(int); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif //#ifndef _RETARGET_H__ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // All credit to Carmine Noviello for this code | ||
| // https://github.com/cnoviello/mastering-stm32/blob/master/nucleo-f030R8/system/src/retarget/retarget.c | ||
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| #include <_ansi.h> | ||
| #include <_syslist.h> | ||
| #include <errno.h> | ||
| #include <sys/time.h> | ||
| #include <sys/times.h> | ||
| #include <limits.h> | ||
| #include <signal.h> | ||
| #include <../Inc/retarget.h> | ||
| #include <stdint.h> | ||
| #include <stdio.h> | ||
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| #if !defined(OS_USE_SEMIHOSTING) | ||
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| #define STDIN_FILENO 0 | ||
| #define STDOUT_FILENO 1 | ||
| #define STDERR_FILENO 2 | ||
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| UART_HandleTypeDef *gHuart; | ||
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| void RetargetInit(UART_HandleTypeDef *huart) { | ||
| gHuart = huart; | ||
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| /* Disable I/O buffering for STDOUT stream, so that | ||
| * chars are sent out as soon as they are printed. */ | ||
| setvbuf(stdout, NULL, _IONBF, 0); | ||
| } | ||
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| int _isatty(int fd) { | ||
| if (fd >= STDIN_FILENO && fd <= STDERR_FILENO) | ||
| return 1; | ||
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| errno = EBADF; | ||
| return 0; | ||
| } | ||
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| int _write(int fd, char* ptr, int len) { | ||
| HAL_StatusTypeDef hstatus; | ||
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| if (fd == STDOUT_FILENO || fd == STDERR_FILENO) { | ||
| hstatus = HAL_UART_Transmit(gHuart, (uint8_t *) ptr, len, HAL_MAX_DELAY); | ||
| if (hstatus == HAL_OK) | ||
| return len; | ||
| else | ||
| return EIO; | ||
| } | ||
| errno = EBADF; | ||
| return -1; | ||
| } | ||
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| int _close(int fd) { | ||
| if (fd >= STDIN_FILENO && fd <= STDERR_FILENO) | ||
| return 0; | ||
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| errno = EBADF; | ||
| return -1; | ||
| } | ||
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| int _lseek(int fd, int ptr, int dir) { | ||
| (void) fd; | ||
| (void) ptr; | ||
| (void) dir; | ||
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| errno = EBADF; | ||
| return -1; | ||
| } | ||
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| int _read(int fd, char* ptr, int len) { | ||
| HAL_StatusTypeDef hstatus; | ||
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| if (fd == STDIN_FILENO) { | ||
| hstatus = HAL_UART_Receive(gHuart, (uint8_t *) ptr, 1, HAL_MAX_DELAY); | ||
| if (hstatus == HAL_OK) | ||
| return 1; | ||
| else | ||
| return EIO; | ||
| } | ||
| errno = EBADF; | ||
| return -1; | ||
| } | ||
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| int _fstat(int fd, struct stat* st) { | ||
| if (fd >= STDIN_FILENO && fd <= STDERR_FILENO) { | ||
| st->st_mode = S_IFCHR; | ||
| return 0; | ||
| } | ||
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| errno = EBADF; | ||
| return 0; | ||
| } | ||
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| int _kill(int pid, int sig) { return 0; } | ||
| int _getpid() { return 0; } | ||
| // Added a forever loop to supress warning: "the 'noreturn' function does return" | ||
| void _exit(int) { for(;;) { } } | ||
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| #endif //#if !defined(OS_USE_SEMIHOSTING) |
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