Fix the bug that HAL_NAND_Read_Page_8b and HAL_NAND_Read_SpareArea_8b cannot read data normally.

Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_hal_nand.c

@@ -635,7 +635,7 @@ HAL_StatusTypeDef HAL_NAND_Read_Page_8b(NAND_HandleTypeDef *hnand, NAND_AddressT
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.PageSize; index++)
       {
-        *buff = *(uint8_t *)deviceaddress;
+        *buff = *(__IO uint8_t *)deviceaddress;
         buff++;
       }
 
@@ -1285,7 +1285,7 @@ HAL_StatusTypeDef HAL_NAND_Read_SpareArea_8b(NAND_HandleTypeDef *hnand, NAND_Add
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.SpareAreaSize; index++)
       {
-        *buff = *(uint8_t *)deviceaddress;
+        *buff = *(__IO uint8_t *)deviceaddress;
         buff++;
       }
 

Projects/STM32746G-Discovery/Examples/UART/UART_TwoBoards_ComDMA/SW4STM32/STM32746G_DISCOVERY/.project

@@ -68,6 +68,10 @@
 			<name>Example/User/main.c</name>
 			<type>1</type>
 			<location>PARENT-2-PROJECT_LOC/Src/main.c</location>
+		</link><link>
+			<name>Example/SW4STM32/syscalls.c</name>
+			<type>1</type>
+			<locationURI>PARENT-1-PROJECT_LOC/syscalls.c</locationURI>
 		</link><link>
 			<name>Drivers/CMSIS/system_stm32f7xx.c</name>
 			<type>1</type>

Projects/STM32746G-Discovery/Examples/UART/UART_TwoBoards_ComDMA/SW4STM32/syscalls.c

@@ -0,0 +1,186 @@
+/**
+*****************************************************************************
+**
+**  File        : syscalls.c
+**
+**  Abstract    : System Workbench Minimal System calls file
+**
+** 		          For more information about which c-functions
+**                need which of these lowlevel functions
+**                please consult the Newlib libc-manual
+**
+**  Environment : System Workbench for MCU
+**
+**  Distribution: The file is distributed �as is,� without any warranty
+**                of any kind.
+**
+**  (c)Copyright System Workbench for MCU.
+**  You may use this file as-is or modify it according to the needs of your
+**  project. Distribution of this file (unmodified or modified) is not
+**  permitted. System Workbench for MCU permit registered System Workbench(R) users the
+**  rights to distribute the assembled, compiled & linked contents of this
+**  file as part of an application binary file, provided that it is built
+**  using the System Workbench for MCU toolchain.
+**
+*****************************************************************************
+*/
+
+/* Includes */
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/times.h>
+
+
+/* Variables */
+//#undef errno
+extern int errno;
+extern int __io_putchar(int ch) __attribute__((weak));
+extern int __io_getchar(void) __attribute__((weak));
+
+register char * stack_ptr asm("sp");
+
+char *__env[1] = { 0 };
+char **environ = __env;
+
+
+/* Functions */
+void initialise_monitor_handles()
+{
+}
+
+int _getpid(void)
+{
+	return 1;
+}
+
+int _kill(int pid, int sig)
+{
+	errno = EINVAL;
+	return -1;
+}
+
+void _exit (int status)
+{
+	_kill(status, -1);
+	while (1) {}		/* Make sure we hang here */
+}
+
+int _read (int file, char *ptr, int len)
+{
+	int DataIdx;
+
+	for (DataIdx = 0; DataIdx < len; DataIdx++)
+	{
+		*ptr++ = __io_getchar();
+	}
+
+return len;
+}
+
+int _write(int file, char *ptr, int len)
+{
+	int DataIdx;
+
+	for (DataIdx = 0; DataIdx < len; DataIdx++)
+	{
+		__io_putchar(*ptr++);
+	}
+	return len;
+}
+
+caddr_t _sbrk(int incr)
+{
+	extern char end asm("end");
+	static char *heap_end;
+	char *prev_heap_end;
+
+	if (heap_end == 0)
+		heap_end = &end;
+
+	prev_heap_end = heap_end;
+	if (heap_end + incr > stack_ptr)
+	{
+//		write(1, "Heap and stack collision\n", 25);
+//		abort();
+		errno = ENOMEM;
+		return (caddr_t) -1;
+	}
+
+	heap_end += incr;
+
+	return (caddr_t) prev_heap_end;
+}
+
+int _close(int file)
+{
+	return -1;
+}
+
+
+int _fstat(int file, struct stat *st)
+{
+	st->st_mode = S_IFCHR;
+	return 0;
+}
+
+int _isatty(int file)
+{
+	return 1;
+}
+
+int _lseek(int file, int ptr, int dir)
+{
+	return 0;
+}
+
+int _open(char *path, int flags, ...)
+{
+	/* Pretend like we always fail */
+	return -1;
+}
+
+int _wait(int *status)
+{
+	errno = ECHILD;
+	return -1;
+}
+
+int _unlink(char *name)
+{
+	errno = ENOENT;
+	return -1;
+}
+
+int _times(struct tms *buf)
+{
+	return -1;
+}
+
+int _stat(char *file, struct stat *st)
+{
+	st->st_mode = S_IFCHR;
+	return 0;
+}
+
+int _link(char *old, char *new)
+{
+	errno = EMLINK;
+	return -1;
+}
+
+int _fork(void)
+{
+	errno = EAGAIN;
+	return -1;
+}
+
+int _execve(char *name, char **argv, char **env)
+{
+	errno = ENOMEM;
+	return -1;
+}

Projects/STM32746G-Discovery/Examples/UART/UART_TwoBoards_ComIT/SW4STM32/STM32746G_DISCOVERY/.project

@@ -68,6 +68,10 @@
 			<name>Example/User/main.c</name>
 			<type>1</type>
 			<location>PARENT-2-PROJECT_LOC/Src/main.c</location>
+		</link><link>
+			<name>Example/SW4STM32/syscalls.c</name>
+			<type>1</type>
+			<locationURI>PARENT-1-PROJECT_LOC/syscalls.c</locationURI>
 		</link><link>
 			<name>Drivers/CMSIS/system_stm32f7xx.c</name>
 			<type>1</type>