SWM050: Finishes GPIO, IAP flash, sysclock, sleep/stop, and the sysctl memory map.

Updates the main memory map and the makefile.
Adds the SWM050 to devices.data, so that a linker script can be automatically generated.

Reviewed-by: Karl Palsson <karlp@tweak.net.au>

lib/swm050/flash.c

@@ -0,0 +1,96 @@
+/** @addtogroup flash_file Flash peripheral API
+ * @ingroup peripheral_apis
+ * LGPL License Terms @ref lgpl_license
+ * @author @htmlonly © @endhtmlonly 2019
+ * Caleb Szalacinski <contact@skiboy.net>
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/**@{*/
+#include <libopencm3/swm050/flash.h>
+
+/* Internal function pointers to the ROM flash API */
+#define IAP_WR	(void *)(0x1000AB)
+#define IAP_E	(void *)(0x100127)
+
+uint32_t (*iap_write_read)(uint32_t *, uint32_t *, uint8_t, uint8_t) = IAP_WR;
+uint32_t (*iap_erase)(void) = IAP_E;
+
+/*---------------------------------------------------------------------------*/
+/** @brief Write to the user flash
+
+Writes words to the 0.5k user flash area.
+Must be performed only when the system clock is 18Mhz.
+
+@param[in] dest Destination address
+	The memory area to copy to.
+	From 0x00 - 0x1FC, as long as it is word-aligned
+
+@param[in] src Source address
+	The memory area to copy from.
+
+@param[in] cnt Number of words to write
+	From 1-128 as long as (dest + (cnt * 4)) < 0x200
+
+@return 1 if successful, 0 if error
+
+*/
+uint32_t flash_write(uint32_t *dest, uint32_t *src, uint8_t cnt)
+{
+	return iap_write_read(dest, src, cnt, 1);
+}
+
+/*---------------------------------------------------------------------------*/
+/** @brief Read from the user flash
+
+Reads words from the 0.5k user flash area.
+Must be performed only when the system clock is 18Mhz.
+
+@param[in] src Source address
+	The memory area to copy from.
+	From 0x00 - 0x1FC, as long as it is word-aligned
+
+@param[out] dest Destination address
+	The memory area to copy to.
+
+@param[in] cnt Number of words to read
+	From 1 - 128 as long as (src + (cnt * 4)) < 0x200
+
+@return 1 if successful, 0 if error
+
+*/
+uint32_t flash_read(uint32_t *src, uint32_t *dest, uint8_t cnt)
+{
+	return iap_write_read(src, dest, cnt, 0);
+}
+
+/*---------------------------------------------------------------------------*/
+/** @brief Erase the user flash
+
+Erases the entire 0.5k user flash area.
+Must be performed only when the system clock is 18Mhz.
+
+@return 1 if successful, 0 if error
+
+*/
+uint32_t flash_erase(void)
+{
+	return iap_erase();
+}
+/**@}*/