Diff: source/hic_hal/maxim/max32620/FlashPrg.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/maxim/max32620/FlashPrg.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,208 @@
+/* CMSIS-DAP Interface Firmware
+ * Copyright (c) 2009-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "FlashOS.h"
+#include "max32620.h"
+#include "flc_regs.h"
+
+/******************************************************************************/
+static inline int FLC_Busy(void)
+{
+    return (MXC_FLC->ctrl & (MXC_F_FLC_CTRL_WRITE | MXC_F_FLC_CTRL_MASS_ERASE | MXC_F_FLC_CTRL_PAGE_ERASE));
+}
+
+/******************************************************************************/
+uint32_t Init(uint32_t adr, uint32_t clk, uint32_t fnc)
+{
+    /* Check if the flash controller is busy */
+    if (FLC_Busy()) {
+        return 1;
+    }
+
+    /* Enable automatic calculation of the clock divider to generate a 1MHz clock from the APB clock */
+    MXC_FLC->perform |= MXC_F_FLC_PERFORM_AUTO_CLKDIV;
+
+    /* The flash controller will stall any reads while flash operations are in
+     * progress. Disable the legacy failure detection logic that would flag reads
+     * during flash operations as errors.
+     */
+    MXC_FLC->perform |= MXC_F_FLC_PERFORM_EN_PREVENT_FAIL;
+
+    return 0;
+}
+
+/******************************************************************************/
+uint32_t UnInit(uint32_t fnc)
+{
+    /* Lock flash */
+    MXC_FLC->ctrl &= ~MXC_F_FLC_CTRL_FLSH_UNLOCK;
+
+    return  0;  // Finished without Errors
+}
+
+/******************************************************************************/
+/*
+ *  Erase complete Flash Memory
+ *    Return Value:   0 - OK,  1 - Failed
+ */
+int EraseChip(void)
+{
+    /* Check if the flash controller is busy */
+    if (FLC_Busy()) {
+        return 1;
+    }
+
+    /* Clear stale errors. Interrupt flags can only be written to zero, so this is safe */
+    MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
+
+    /* Unlock flash */
+    MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) | (MXC_V_FLC_FLSH_UNLOCK_KEY << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS);
+
+    /* Write the Erase Code */
+    MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_ERASE_CODE) | (MXC_V_FLC_ERASE_CODE_MASS_ERASE << MXC_F_FLC_CTRL_ERASE_CODE_POS);
+
+    /* Start the mass erase */
+    MXC_FLC->ctrl |= MXC_F_FLC_CTRL_MASS_ERASE;
+
+    /* Wait until flash operation is complete */
+    while (FLC_Busy());
+
+    /* Lock flash */
+    MXC_FLC->ctrl &= ~(MXC_F_FLC_CTRL_FLSH_UNLOCK | MXC_F_FLC_CTRL_ERASE_CODE);
+
+    /* Check for failures */
+    if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
+        /* Interrupt flags can only be written to zero, so this is safe */
+        MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
+        return 1;
+    }
+
+    return 0;
+}
+
+/******************************************************************************/
+/*
+ *  Erase Sector in Flash Memory
+ *    Parameter:      address:  Sector Address
+ *    Return Value:   0 - OK,  1 - Failed
+ */
+int EraseSector(unsigned long address)
+{
+    /* Wait until flash operation is complete */
+    while (FLC_Busy());
+
+    /* Clear stale errors. Interrupt flags can only be written to zero, so this is safe */
+    MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
+
+    /* Unlock flash */
+    MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) | (MXC_V_FLC_FLSH_UNLOCK_KEY << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS);
+
+    /* Write page erase code */
+    MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_ERASE_CODE) | (MXC_V_FLC_ERASE_CODE_PAGE_ERASE << MXC_F_FLC_CTRL_ERASE_CODE_POS);
+
+    /* Erase the request page */
+    MXC_FLC->faddr = address;
+    MXC_FLC->ctrl |= MXC_F_FLC_CTRL_PAGE_ERASE;
+
+    /* Wait until flash operation is complete */
+    while (FLC_Busy());
+
+    /* Lock flash */
+    MXC_FLC->ctrl &= ~(MXC_F_FLC_CTRL_FLSH_UNLOCK | MXC_F_FLC_CTRL_ERASE_CODE);
+
+    /* Check for failures */
+    if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
+        /* Interrupt flags can only be written to zero, so this is safe */
+        MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
+        return 1;
+    }
+
+    return 0;
+}
+
+/******************************************************************************/
+/*
+ *  Program Page in Flash Memory
+ *    Parameter:      address:  Page Start Address
+ *                    size:     Page Size
+ *                    buffer:   Page Data
+ *    Return Value:   0 - OK,  1 - Failed
+ */
+int ProgramPage(unsigned long address, unsigned long size, unsigned char *buffer8)
+{
+    unsigned long remaining = size;
+    unsigned long *buffer = (unsigned long *)buffer8;
+
+    // Only accept 32-bit aligned pointers
+    if ((unsigned long)buffer8 & 0x3) {
+        return 1;
+    }
+    buffer = (unsigned long *)buffer8;
+
+    /* Check if the flash controller is busy */
+    if (FLC_Busy()) {
+        return 1;
+    }
+
+    /* Unlock flash */
+    MXC_FLC->ctrl = (MXC_FLC->ctrl & ~MXC_F_FLC_CTRL_FLSH_UNLOCK) | (MXC_V_FLC_FLSH_UNLOCK_KEY << MXC_F_FLC_CTRL_FLSH_UNLOCK_POS);
+
+    while (remaining >= 4) {
+        MXC_FLC->faddr = address;
+        MXC_FLC->fdata = *buffer++;
+        MXC_FLC->ctrl |= MXC_F_FLC_CTRL_WRITE_ENABLE;
+        MXC_FLC->ctrl |= MXC_F_FLC_CTRL_WRITE;
+
+        /* Wait until flash operation is complete */
+        while (FLC_Busy());
+
+        address += 4;
+        remaining -= 4;
+    }
+
+    if (remaining > 0) {
+        uint32_t last_word;
+        uint32_t mask;
+
+        last_word = 0xffffffff;
+        mask = 0xff;
+
+        while (remaining > 0) {
+            last_word &= (*buffer | ~mask);
+            mask <<= 8;
+            remaining--;
+        }
+
+        MXC_FLC->faddr = address;
+        MXC_FLC->fdata = last_word;
+        MXC_FLC->ctrl |= MXC_F_FLC_CTRL_WRITE_ENABLE;
+
+        /* Wait until flash operation is complete */
+        while (FLC_Busy());
+    }
+
+    /* Lock flash */
+    MXC_FLC->ctrl &= ~MXC_F_FLC_CTRL_FLSH_UNLOCK;
+
+    /* Check for failures */
+    if (MXC_FLC->intr & MXC_F_FLC_INTR_FAILED_IF) {
+        /* Interrupt flags can only be written to zero, so this is safe */
+        MXC_FLC->intr &= ~MXC_F_FLC_INTR_FAILED_IF;
+        return 1;
+    }
+
+    return  0;
+}