samples: A test app for WinBond spi flash

Add a test app for WinBond spi flash.

Change-Id: I2c274d1c2842bbe029a41fdfbc7ab8f59949eec2
Signed-off-by: Baohong Liu <baohong.liu@intel.com>

samples/drivers/spi_flash/Makefile

@@ -0,0 +1,6 @@
+MDEF_FILE = prj.mdef
+KERNEL_TYPE = micro
+BOARD ?= arduino_101
+CONF_FILE = prj.conf
+
+include ${ZEPHYR_BASE}/Makefile.inc

samples/drivers/spi_flash/README.txt

@@ -0,0 +1,35 @@
+Title: SPI flash read and write
+
+Description:
+
+A simple spi flash example using the microkernel.
+
+--------------------------------------------------------------------------------
+
+Building and Running Project:
+
+This microkernel project outputs to the console.  It can be built and executed
+on arduino_101 as follows:
+
+    make BOARD=arduino_101
+
+--------------------------------------------------------------------------------
+
+Troubleshooting:
+
+Problems caused by out-dated project information can be addressed by
+issuing one of the following commands then rebuilding the project:
+
+    make clean          # discard results of previous builds
+                        # but keep existing configuration info
+or
+    make pristine       # discard results of previous builds
+                        # and restore pre-defined configuration info
+
+--------------------------------------------------------------------------------
+
+Sample Output:
+
+SPI flash testing!
+data sent ..
+data received ...

samples/drivers/spi_flash/prj.conf

@@ -0,0 +1,7 @@
+# Use standard security profile. (=> no need for a random number generator)
+CONFIG_STDOUT_CONSOLE=y
+CONFIG_FLASH=y
+CONFIG_SPI=y
+CONFIG_GPIO=y
+CONFIG_SPI_DW_CS_GPIO=y
+CONFIG_SPI_DW_PORT_0_CS_GPIO_PIN=24

samples/drivers/spi_flash/prj.mdef

@@ -0,0 +1,5 @@
+% Application       : SPI flash demo
+
+% TASK NAME  PRIO ENTRY STACK GROUPS
+% ==================================
+  TASK TASKA    7 main  2048 [EXE]

samples/drivers/spi_flash/src/Makefile

@@ -0,0 +1 @@
+obj-y = main.o

samples/drivers/spi_flash/src/main.c

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <zephyr.h>
+#include <flash.h>
+#include <device.h>
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define PRINT           printf
+#else
+#include <misc/printk.h>
+#define PRINT           printk
+#endif
+
+#define FLASH_TEST_REGION_OFFSET 0xff000
+#define FLASH_SECTOR_SIZE        4096
+#define TEST_DATA_BYTE_0         0x55
+#define TEST_DATA_BYTE_1         0xaa
+#define TEST_DATA_LEN            2
+
+void main(void)
+{
+	PRINT("SPI flash testing!\n");
+
+	struct device *dev;
+	uint8_t buf[TEST_DATA_LEN];
+
+	dev = device_get_binding("W25QXXDV");
+
+	if (!dev) {
+		PRINT("SPI flash driver was not found!\n");
+		return;
+	}
+
+	flash_write_protected(dev, false);
+
+	flash_erase(dev, FLASH_TEST_REGION_OFFSET, FLASH_SECTOR_SIZE);
+
+	flash_write_protected(dev, false);
+
+	buf[0] = TEST_DATA_BYTE_0;
+	buf[1] = TEST_DATA_BYTE_1;
+	if (flash_write(dev, FLASH_TEST_REGION_OFFSET,
+	    TEST_DATA_LEN, buf) != DEV_OK) {
+		PRINT("SPI flash did not work as expected!\n");
+		return;
+	}
+	PRINT("data sent %x %x\n", buf[0], buf[1]);
+
+	if (flash_read(dev, FLASH_TEST_REGION_OFFSET,
+	    TEST_DATA_LEN, buf) != DEV_OK) {
+		PRINT("SPI flash did not work as expected!\n");
+		return;
+	}
+	PRINT("data received %x %x\n", buf[0], buf[1]);
+
+	if ((buf[0] == TEST_DATA_BYTE_0) && (buf[1] == TEST_DATA_BYTE_1)) {
+		PRINT("data received matches with data sent. Good!!\n");
+	} else {
+		PRINT("data received does not match with data sent!!\n");
+	}
+}