[bsp][stm32] add f0 flash driver

bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f0.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-12-22     zylx         first version
+ */
+
+#include "board.h"
+
+#ifdef BSP_USING_ON_CHIP_FLASH
+#include "drv_config.h"
+#include "drv_flash.h"
+
+#if defined(PKG_USING_FAL)
+#include "fal.h"
+#endif
+
+//#define DRV_DEBUG
+#define LOG_TAG                "drv.flash"
+#include <drv_log.h>
+
+/**
+  * @brief  Gets the page of a given address
+  * @param  Addr: Address of the FLASH Memory
+  * @retval The page of a given address
+  */
+static uint32_t GetPage(uint32_t addr)
+{
+    uint32_t page = 0;
+    page = RT_ALIGN_DOWN(addr, FLASH_PAGE_SIZE);
+    return page;
+}
+
+/**
+ * Read data from flash.
+ * @note This operation's units is word.
+ *
+ * @param addr flash address
+ * @param buf buffer to store read data
+ * @param size read bytes size
+ *
+ * @return result
+ */
+int stm32_flash_read(long offset, rt_uint8_t *buf, size_t size)
+{
+    size_t i;
+    rt_uint32_t addr = STM32_FLASH_START_ADRESS + offset;
+
+    if ((addr + size) > STM32_FLASH_END_ADDRESS)
+    {
+        LOG_E("read outrange flash size! addr is (0x%p)", (void *)(addr + size));
+        return -RT_EINVAL;
+    }
+
+    for (i = 0; i < size; i++, buf++, addr++)
+    {
+        *buf = *(rt_uint8_t *) addr;
+    }
+
+    return size;
+}
+
+/**
+ * Write data to flash.
+ * @note This operation's units is word.
+ * @note This operation must after erase. @see flash_erase.
+ *
+ * @param addr flash address
+ * @param buf the write data buffer
+ * @param size write bytes size
+ *
+ * @return result
+ */
+int stm32_flash_write(long offset, const rt_uint8_t *buf, size_t size)
+{
+    rt_err_t result        = RT_EOK;
+    rt_uint32_t addr       = STM32_FLASH_START_ADRESS + offset;
+    rt_uint32_t end_addr   = addr + size;
+
+    if (addr % 4 != 0)
+    {
+        LOG_E("write addr must be 4-byte alignment");
+        return -RT_EINVAL;
+    }
+
+    if (size % 4 != 0)
+    {
+        LOG_E("write size must be 4-byte alignment");
+        return -RT_EINVAL;
+    }
+
+    if ((end_addr) > STM32_FLASH_END_ADDRESS)
+    {
+        LOG_E("write outrange flash size! addr is (0x%p)", (void *)(addr + size));
+        return -RT_EINVAL;
+    }
+
+    HAL_FLASH_Unlock();
+
+    while (addr < end_addr)
+    {
+        if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, addr, *((rt_uint32_t *)buf)) == HAL_OK)
+        {
+            if (*(rt_uint32_t *)addr != *(rt_uint32_t *)buf)
+            {
+                result = -RT_ERROR;
+                break;
+            }
+            addr += 4;
+            buf  += 4;
+        }
+        else
+        {
+            result = -RT_ERROR;
+            break;
+        }
+    }
+
+    HAL_FLASH_Lock();
+
+    if (result != RT_EOK)
+    {
+        return result;
+    }
+
+    return size;
+}
+
+/**
+ * Erase data on flash.
+ * @note This operation is irreversible.
+ * @note This operation's units is different which on many chips.
+ *
+ * @param addr flash address
+ * @param size erase bytes size
+ *
+ * @return result
+ */
+int stm32_flash_erase(long offset, size_t size)
+{
+    rt_err_t result = RT_EOK;
+    rt_uint32_t addr = STM32_FLASH_START_ADRESS + offset;
+    uint32_t PAGEError = 0;
+
+    /*Variable used for Erase procedure*/
+    FLASH_EraseInitTypeDef EraseInitStruct;
+
+    if ((addr + size) > STM32_FLASH_END_ADDRESS)
+    {
+        LOG_E("ERROR: erase outrange flash size! addr is (0x%p)\n", (void *)(addr + size));
+        return -RT_EINVAL;
+    }
+
+    HAL_FLASH_Unlock();
+
+    /* Fill EraseInit structure*/
+    EraseInitStruct.TypeErase   = FLASH_TYPEERASE_PAGES;
+    EraseInitStruct.PageAddress = GetPage(addr);
+    EraseInitStruct.NbPages     = (size + FLASH_PAGE_SIZE - 1) / FLASH_PAGE_SIZE;
+
+    if (HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError) != HAL_OK)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+__exit:
+    HAL_FLASH_Lock();
+
+    if (result != RT_EOK)
+    {
+        return result;
+    }
+
+    LOG_D("erase done: addr (0x%p), size %d", (void *)addr, size);
+    return result;
+}
+
+#if defined(PKG_USING_FAL)
+const struct fal_flash_dev stm32_onchip_flash = { "onchip_flash", STM32_FLASH_START_ADRESS, STM32_FLASH_SIZE, FLASH_PAGE_SIZE, {NULL, stm32_flash_read, stm32_flash_write, stm32_flash_erase} };
+#endif
+#endif /* BSP_USING_ON_CHIP_FLASH */