Added wrapper to NVM device API for Zephyr flash API.

Wrapped Zephyr flash API calls for OpenRTX interface, added
additional settings specific to T-TWR Plus.

TG-553

platform/drivers/NVM/flash_zephyr.c

@@ -0,0 +1,72 @@
+/***************************************************************************
+ *   Copyright (C) 2023 by Federico Amedeo Izzo IU2NUO,                    *
+ *                         Niccolò Izzo IU2KIN                             *
+ *                         Frederik Saraci IU2NRO                          *
+ *                         Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <stdio.h>
+#include <zephyr/drivers/flash.h>
+#include "flash_zephyr.h"
+
+static int nvm_api_read(const struct nvmDevice *dev, uint32_t offset,
+                        void *data, size_t len)
+{
+    const struct device *fDev = (const struct device *)(dev->config);
+
+    return flash_read(fDev, offset, data, len);
+}
+
+static int nvm_api_write(const struct nvmDevice *dev, uint32_t offset,
+                         const void *data, size_t len)
+{
+    const struct device *fDev = (const struct device *)(dev->config);
+
+    return flash_write(fDev, offset, data, len);
+}
+
+static int nvm_api_erase(const struct nvmDevice *dev, uint32_t offset, size_t size)
+{
+    const struct device *fDev = (const struct device *)(dev->config);
+
+    return flash_erase(fDev, offset, size);
+}
+
+static const struct nvmParams *nvm_api_params(const struct nvmDevice *dev)
+{
+    struct nvmParams    *params = (struct nvmParams *)(dev->priv);
+    const struct device *fDev   = (const struct device *)(dev->config);
+
+    // Retrieve write size
+    const struct flash_parameters *info = flash_get_parameters(fDev);
+    params->write_size = info->write_block_size;
+
+    // TODO: erase size and erase cycles to be retrieved from the real device.
+    params->erase_size   = 4096;
+    params->erase_cycles = 100000;
+    params->type         = NVM_FLASH;
+
+    return params;
+}
+
+const struct nvmApi zephyr_flash_api =
+{
+    .read   = nvm_api_read,
+    .write  = nvm_api_write,
+    .erase  = nvm_api_erase,
+    .sync   = NULL,
+    .params = nvm_api_params
+};

platform/drivers/NVM/flash_zephyr.h

@@ -0,0 +1,52 @@
+/***************************************************************************
+ *   Copyright (C) 2023 by Federico Amedeo Izzo IU2NUO,                    *
+ *                         Niccolò Izzo IU2KIN                             *
+ *                         Frederik Saraci IU2NRO                          *
+ *                         Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#ifndef FLASH_ZEPHYR_H
+#define FLASH_ZEPHYR_H
+
+#include <interfaces/nvmem.h>
+
+/**
+ * Wrapper interface for the Zephyr RTOS flash memory device driver.
+ */
+
+/**
+ *  Device driver API for Zephyr RTOS flash memory.
+ */
+extern const struct nvmApi zephyr_flash_api;
+
+
+/**
+ * Instantiate a nonvolatile memory device based on Zephyr RTOS flash device
+ * driver.
+ *
+ * @param name: device name.
+ * @param alias: devicetree alias of the flash device.
+ */
+#define ZEPHYR_FLASH_DEVICE_DEFINE(name, alias) \
+static struct nvmParams flash_params_##name;    \
+static const struct nvmDevice name =            \
+{                                               \
+    .config = DEVICE_DT_GET(DT_ALIAS(alias)),   \
+    .priv   = &flash_params_##name,             \
+    .api    = &zephyr_flash_api                 \
+};
+
+#endif /* FLASH_ZEPHYR_H */

platform/targets/ttwrplus/CMakeLists.txt

@@ -19,6 +19,7 @@ target_sources(app
     ${OPENRTX_ROOT}/platform/drivers/baseband/SA8x8.c
     ${OPENRTX_ROOT}/platform/drivers/GPS/GPS_ttwrplus.c
     ${OPENRTX_ROOT}/platform/drivers/audio/audio_ttwrplus.c
+    ${OPENRTX_ROOT}/platform/drivers/NVM/flash_zephyr.c
 
     ${OPENRTX_ROOT}/platform/drivers/stubs/cps_io_stub.c
     ${OPENRTX_ROOT}/platform/drivers/stubs/nvmem_stub.c

platform/targets/ttwrplus/ttwrplus_defconfig

@@ -21,3 +21,6 @@ CONFIG_WS2812_STRIP=y
 CONFIG_WS2812_STRIP_SPI=y
 CONFIG_PICOLIBC_IO_FLOAT=y
 CONFIG_POSIX_API=y
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_SOC_FLASH_ESP32=y