rtc, keeping time

1 files changed, 143 insertions, 0 deletions

diff --git a/drivers_nrf/hal/nrf_nvmc.c b/drivers_nrf/hal/nrf_nvmc.c
new file mode 100644
index 0000000..5eb5f68
--- /dev/null
+++ b/drivers_nrf/hal/nrf_nvmc.c
@@ -0,0 +1,143 @@
+/**
+ * Copyright (c) 2012 - 2017, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+/**
+ *@file
+ *@brief NMVC driver implementation
+ */
+
+#include <stdbool.h>
+#include "nrf.h"
+#include "nrf_nvmc.h"
+
+
+void nrf_nvmc_page_erase(uint32_t address)
+{
+    // Enable erase.
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+
+    // Erase the page
+    NRF_NVMC->ERASEPAGE = address;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+}
+
+
+void nrf_nvmc_write_byte(uint32_t address, uint8_t value)
+{
+    uint32_t byte_shift = address & (uint32_t)0x03;
+    uint32_t address32 = address & ~byte_shift; // Address to the word this byte is in.
+    uint32_t value32 = (*(uint32_t*)address32 & ~((uint32_t)0xFF << (byte_shift << (uint32_t)3)));
+    value32 = value32 + ((uint32_t)value << (byte_shift << 3));
+
+    // Enable write.
+    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+
+    *(uint32_t*)address32 = value32;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+
+    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
+    {
+    }
+}
+
+void nrf_nvmc_write_word(uint32_t address, uint32_t value)
+{
+    // Enable write.
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
+    }
+
+    *(uint32_t*)address = value;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
+    }
+
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+}
+
+void nrf_nvmc_write_bytes(uint32_t address, const uint8_t * src, uint32_t num_bytes)
+{
+    uint32_t i;
+    for (i=0;i<num_bytes;i++)
+    {
+       nrf_nvmc_write_byte(address + i,src[i]);
+    }
+}
+
+void nrf_nvmc_write_words(uint32_t address, const uint32_t * src, uint32_t num_words)
+{
+    uint32_t i;
+
+    // Enable write.
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+
+    for (i=0;i<num_words;i++)
+    {
+        ((uint32_t*)address)[i] = src[i];
+        while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+        {
+        }
+    }
+
+    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
+    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
+    {
+    }
+}
+