Added block device test for SD driver

Author: Deepika

TESTS/block_device/basic/basic.cpp

@@ -0,0 +1,179 @@
+/*
+ * mbed Microcontroller Library
+ * Copyright (c) 2006-2016 ARM Limited
+ *
+ * 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.
+ *
+ */
+
+/* The following copyright notice is reproduced from the glibc project
+ * REF_LICENCE_GLIBC
+ *
+ * Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the GNU C Library; see the file COPYING.LIB.  If
+ * not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+ * Cambridge, MA 02139, USA.
+ */
+
+
+/** @file main.cpp Basic SD Driver Test
+ */
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+
+#include "SDBlockDevice.h"
+#include <stdlib.h>
+
+using namespace utest::v1;
+
+#define TEST_BLOCK_COUNT        10
+#define TEST_ERROR_MASK         16
+#define TEST_BLOCK_SIZE         2048
+
+const struct {
+    const char *name;
+    bd_size_t (BlockDevice::*method)() const;
+} ATTRS[] = {
+    {"read size",    &BlockDevice::get_read_size},
+    {"program size", &BlockDevice::get_program_size},
+    {"erase size",   &BlockDevice::get_erase_size},
+    {"total size",   &BlockDevice::size},
+};
+
+void test_read_write() {
+    SDBlockDevice sd(MBED_CONF_SD_SPI_MOSI, MBED_CONF_SD_SPI_MISO, MBED_CONF_SD_SPI_CLK, MBED_CONF_SD_SPI_CS);
+
+    int err = sd.init();
+    TEST_ASSERT_EQUAL(0, err);
+
+    err = sd.frequency(25000000);
+    TEST_ASSERT_EQUAL(0, err);
+
+    for (unsigned a = 0; a < sizeof(ATTRS)/sizeof(ATTRS[0]); a++) {
+        static const char *prefixes[] = {"", "k", "M", "G"};
+        for (int i = 3; i >= 0; i--) {
+            bd_size_t size = (sd.*ATTRS[a].method)();
+            if (size >= (1ULL << 10*i)) {
+                printf("%s: %llu%sbytes (%llubytes)\n",
+                    ATTRS[a].name, size >> 10*i, prefixes[i], size);
+                break;
+            }
+        }
+    }
+
+    bd_size_t erase_size = sd.get_erase_size();
+    bd_size_t block_size = erase_size > TEST_BLOCK_SIZE ? erase_size : TEST_BLOCK_SIZE;
+
+    uint8_t *write_block = new uint8_t[block_size];
+    uint8_t *read_block = new uint8_t[block_size];
+    uint8_t *error_mask = new uint8_t[TEST_ERROR_MASK];
+    unsigned addrwidth = ceil(log(float(sd.size()-1)) / log(float(16)))+1;
+
+    for (int b = 0; b < TEST_BLOCK_COUNT; b++) {
+        // Find a random block
+        bd_addr_t block = (rand()*block_size) % sd.size();
+
+        // Use next random number as temporary seed to keep
+        // the address progressing in the pseudorandom sequence
+        unsigned seed = rand();
+
+        // Fill with random sequence
+        srand(seed);
+        for (bd_size_t i = 0; i < block_size; i++) {
+            write_block[i] = 0xff & rand();
+        }
+
+        // Write, sync, and read the block
+        printf("test  %0*llx:%llu...\n", addrwidth, block, block_size);
+
+        err = sd.erase(block, block_size);
+        TEST_ASSERT_EQUAL(0, err);
+
+        err = sd.program(write_block, block, block_size);
+        TEST_ASSERT_EQUAL(0, err);
+
+        printf("write %0*llx:%llu ", addrwidth, block, block_size);
+        for (int i = 0; i < 16; i++) {
+            printf("%02x", write_block[i]);
+        }
+        printf("...\n");
+
+        err = sd.read(read_block, block, block_size);
+        TEST_ASSERT_EQUAL(0, err);
+
+        printf("read  %0*llx:%llu ", addrwidth, block, block_size);
+        for (int i = 0; i < 16; i++) {
+            printf("%02x", read_block[i]);
+        }
+        printf("...\n");
+
+        // Find error mask for debugging
+        memset(error_mask, 0, TEST_ERROR_MASK);
+        bd_size_t error_scale = block_size / (TEST_ERROR_MASK*8);
+
+        srand(seed);
+        for (bd_size_t i = 0; i < TEST_ERROR_MASK*8; i++) {
+            for (bd_size_t j = 0; j < error_scale; j++) {
+                if ((0xff & rand()) != read_block[i*error_scale + j]) {
+                    error_mask[i/8] |= 1 << (i%8);
+                }
+            }
+        }
+
+        printf("error %0*llx:%llu ", addrwidth, block, block_size);
+        for (int i = 0; i < 16; i++) {
+            printf("%02x", error_mask[i]);
+        }
+        printf("\n");
+
+        // Check that the data was unmodified
+        srand(seed);
+        for (bd_size_t i = 0; i < block_size; i++) {
+            TEST_ASSERT_EQUAL(0xff & rand(), read_block[i]);
+        }
+    }
+
+    err = sd.deinit();
+    TEST_ASSERT_EQUAL(0, err);
+}
+
+// Test setup
+utest::v1::status_t test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(30, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("Testing read write random blocks", test_read_write),
+};
+
+Specification specification(test_setup, cases);
+
+int main() {
+    return !Harness::run(specification);
+}