Diff: nordic/bootloader_dfu/dfu_app_handler.c

Revision:

66:b3680699d9a4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/bootloader_dfu/dfu_app_handler.c	Mon Sep 22 11:19:51 2014 +0100
@@ -0,0 +1,81 @@
+/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+#include "dfu_app_handler.h"
+#include "bootloader_util.h"
+#include "nrf_sdm.h"
+#include "app_error.h"
+
+#define IRQ_ENABLED             0x01                                            /**< Field identifying if an interrupt is enabled. */
+#define MAX_NUMBER_INTERRUPTS   32                                              /**< Maximum number of interrupts available. */
+
+static void                     dfu_app_reset_prepare(void);                    /**< Forward declare of default reset handler. */
+static dfu_app_reset_prepare_t  m_reset_prepare = dfu_app_reset_prepare;        /**< Callback function to application to prepare for system reset. Allows application to cleanup of service and memory prior to reset. */
+
+
+/**@brief Default reset prepare handler if application hasn't registered a handler.
+ */
+static void dfu_app_reset_prepare(void)
+{
+    // Reset prepare should be handled by application.
+    // This function can be extended to include default handling if application does not implement
+    // own handler.
+}
+
+
+/**@brief Function for disabling all interrupts before jumping from bootloader to application.
+ */
+static void interrupts_disable(void)
+{
+    uint32_t interrupt_setting_mask;
+    uint32_t irq = 0; // We start from first interrupt, i.e. interrupt 0.
+
+    // Fetch the current interrupt settings.
+    interrupt_setting_mask = NVIC->ISER[0];
+
+    for (; irq < MAX_NUMBER_INTERRUPTS; irq++)
+    {
+        if (interrupt_setting_mask & (IRQ_ENABLED << irq))
+        {
+            // The interrupt was enabled, and hence disable it.
+            NVIC_DisableIRQ((IRQn_Type)irq);
+        }
+    }
+}
+
+
+/**@brief Function for preparing the reset, disabling SoftDevice and jump to the bootloader.
+ */
+void bootloader_start(void)
+{
+    m_reset_prepare();
+
+    uint32_t err_code = sd_power_gpregret_set(BOOTLOADER_DFU_START);
+    APP_ERROR_CHECK(err_code);
+
+    err_code = sd_softdevice_disable();
+    APP_ERROR_CHECK(err_code);
+
+    interrupts_disable();
+
+    err_code = sd_softdevice_vector_table_base_set(NRF_UICR->BOOTLOADERADDR);
+    APP_ERROR_CHECK(err_code);
+
+    bootloader_util_app_start(NRF_UICR->BOOTLOADERADDR);
+}
+
+
+
+void dfu_app_reset_prepare_set(dfu_app_reset_prepare_t reset_prepare_func)
+{
+    m_reset_prepare = reset_prepare_func;
+}