John Karatka / mbed

mbed

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32L0/flash_api.c@175:b96e65c34a4d, 2017-10-02 (annotated)

Committer:
AnnaBridge
Date:
Mon Oct 02 15:33:19 2017 +0100
Revision:
175:b96e65c34a4d
Parent:
168:9672193075cf
Child:
176:af195413fb11
This updates the lib to the mbed lib v 152

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 167:e84263d55307 1 /* mbed Microcontroller Library
AnnaBridge 167:e84263d55307 2 * Copyright (c) 2017 ARM Limited
AnnaBridge 167:e84263d55307 3 *
AnnaBridge 167:e84263d55307 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 167:e84263d55307 5 * you may not use this file except in compliance with the License.
AnnaBridge 167:e84263d55307 6 * You may obtain a copy of the License at
AnnaBridge 167:e84263d55307 7 *
AnnaBridge 167:e84263d55307 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 167:e84263d55307 9 *
AnnaBridge 167:e84263d55307 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 167:e84263d55307 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 167:e84263d55307 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 167:e84263d55307 13 * See the License for the specific language governing permissions and
AnnaBridge 167:e84263d55307 14 * limitations under the License.
AnnaBridge 167:e84263d55307 15 */
AnnaBridge 167:e84263d55307 16
AnnaBridge 167:e84263d55307 17 #include "flash_api.h"
AnnaBridge 167:e84263d55307 18 #include "mbed_critical.h"
AnnaBridge 167:e84263d55307 19
AnnaBridge 167:e84263d55307 20 #if DEVICE_FLASH
AnnaBridge 167:e84263d55307 21 #include "mbed_assert.h"
AnnaBridge 167:e84263d55307 22 #include "cmsis.h"
AnnaBridge 167:e84263d55307 23
AnnaBridge 167:e84263d55307 24 /* L0 targets embed 32 pages sectors */
AnnaBridge 167:e84263d55307 25 #define NUM_PAGES_IN_SECTOR 32
AnnaBridge 167:e84263d55307 26
AnnaBridge 167:e84263d55307 27 int32_t flash_init(flash_t *obj)
AnnaBridge 167:e84263d55307 28 {
AnnaBridge 167:e84263d55307 29 /* Unlock the Flash to enable the flash control register access *************/
AnnaBridge 167:e84263d55307 30 HAL_FLASH_Unlock();
AnnaBridge 167:e84263d55307 31 return 0;
AnnaBridge 167:e84263d55307 32 }
AnnaBridge 167:e84263d55307 33
AnnaBridge 167:e84263d55307 34 int32_t flash_free(flash_t *obj)
AnnaBridge 167:e84263d55307 35 {
AnnaBridge 167:e84263d55307 36 /* Lock the Flash to disable the flash control register access (recommended
AnnaBridge 167:e84263d55307 37 * to protect the FLASH memory against possible unwanted operation) *********/
AnnaBridge 167:e84263d55307 38 HAL_FLASH_Lock();
AnnaBridge 167:e84263d55307 39 return 0;
AnnaBridge 167:e84263d55307 40 }
AnnaBridge 167:e84263d55307 41
AnnaBridge 167:e84263d55307 42 int32_t flash_erase_sector(flash_t *obj, uint32_t address)
AnnaBridge 167:e84263d55307 43 {
AnnaBridge 167:e84263d55307 44 uint32_t FirstPage = 0;
AnnaBridge 167:e84263d55307 45 uint32_t PAGEError = 0;
AnnaBridge 167:e84263d55307 46 FLASH_EraseInitTypeDef EraseInitStruct;
AnnaBridge 167:e84263d55307 47
AnnaBridge 167:e84263d55307 48 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 49
AnnaBridge 167:e84263d55307 50 return -1;
AnnaBridge 167:e84263d55307 51 }
AnnaBridge 167:e84263d55307 52
AnnaBridge 167:e84263d55307 53 /* Clear OPTVERR bit set on virgin samples */
AnnaBridge 167:e84263d55307 54 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);
AnnaBridge 167:e84263d55307 55
AnnaBridge 167:e84263d55307 56 /* MBED HAL erases 1 sector at a time */
AnnaBridge 167:e84263d55307 57 /* Fill EraseInit structure*/
AnnaBridge 167:e84263d55307 58 EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
AnnaBridge 167:e84263d55307 59 EraseInitStruct.PageAddress = address;
AnnaBridge 167:e84263d55307 60 EraseInitStruct.NbPages = NUM_PAGES_IN_SECTOR;
AnnaBridge 167:e84263d55307 61
AnnaBridge 167:e84263d55307 62 /* Note: If an erase operation in Flash memory also concerns data in the data or instruction cache,
AnnaBridge 167:e84263d55307 63 you have to make sure that these data are rewritten before they are accessed during code
AnnaBridge 167:e84263d55307 64 execution. If this cannot be done safely, it is recommended to flush the caches by setting the
AnnaBridge 167:e84263d55307 65 DCRST and ICRST bits in the FLASH_CR register. */
AnnaBridge 167:e84263d55307 66
AnnaBridge 167:e84263d55307 67 if (HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError) != HAL_OK) {
AnnaBridge 167:e84263d55307 68 return -1;
AnnaBridge 167:e84263d55307 69 } else {
AnnaBridge 167:e84263d55307 70 return 0;
AnnaBridge 167:e84263d55307 71 }
AnnaBridge 167:e84263d55307 72 }
AnnaBridge 167:e84263d55307 73
AnnaBridge 167:e84263d55307 74 int32_t flash_program_page(flash_t *obj, uint32_t address,
AnnaBridge 167:e84263d55307 75 const uint8_t *data, uint32_t size)
AnnaBridge 167:e84263d55307 76 {
AnnaBridge 167:e84263d55307 77 uint32_t StartAddress = 0;
AnnaBridge 167:e84263d55307 78
AnnaBridge 167:e84263d55307 79 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 80 return -1;
AnnaBridge 167:e84263d55307 81 }
AnnaBridge 167:e84263d55307 82
AnnaBridge 167:e84263d55307 83 if ((size % 4) != 0) {
AnnaBridge 167:e84263d55307 84 /* L4 flash devices can only be programmed 64bits/8 bytes at a time */
AnnaBridge 167:e84263d55307 85 return -1;
AnnaBridge 167:e84263d55307 86 }
AnnaBridge 167:e84263d55307 87
AnnaBridge 167:e84263d55307 88 /* Program the user Flash area word by word */
AnnaBridge 167:e84263d55307 89 StartAddress = address;
AnnaBridge 167:e84263d55307 90
AnnaBridge 167:e84263d55307 91 /* HW needs an aligned address to program flash, which data
AnnaBridge 167:e84263d55307 92 * parameters doesn't ensure */
AnnaBridge 167:e84263d55307 93 if ((uint32_t) data % 4 != 0) {
AnnaBridge 167:e84263d55307 94 volatile uint32_t data32;
AnnaBridge 167:e84263d55307 95 while (address < (StartAddress + size)) {
AnnaBridge 167:e84263d55307 96 for (uint8_t i =0; i < 4; i++) {
AnnaBridge 167:e84263d55307 97 *(((uint8_t *) &data32) + i) = *(data + i);
AnnaBridge 167:e84263d55307 98 }
AnnaBridge 167:e84263d55307 99
AnnaBridge 167:e84263d55307 100 if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data32) == HAL_OK) {
AnnaBridge 167:e84263d55307 101 address = address + 4;
AnnaBridge 167:e84263d55307 102 data = data + 4;
AnnaBridge 167:e84263d55307 103 } else {
AnnaBridge 167:e84263d55307 104 return -1;
AnnaBridge 167:e84263d55307 105 }
AnnaBridge 167:e84263d55307 106 }
AnnaBridge 167:e84263d55307 107 } else { /* case where data is aligned, so let's avoid any copy */
AnnaBridge 167:e84263d55307 108 while (address < (StartAddress + size)) {
AnnaBridge 167:e84263d55307 109 if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, *((uint32_t*) data)) == HAL_OK) {
AnnaBridge 167:e84263d55307 110 address = address + 4;
AnnaBridge 167:e84263d55307 111 data = data + 4;
AnnaBridge 167:e84263d55307 112 } else {
AnnaBridge 167:e84263d55307 113 return -1;
AnnaBridge 167:e84263d55307 114 }
AnnaBridge 167:e84263d55307 115 }
AnnaBridge 167:e84263d55307 116 }
AnnaBridge 167:e84263d55307 117
AnnaBridge 167:e84263d55307 118 return 0;
AnnaBridge 167:e84263d55307 119 }
AnnaBridge 167:e84263d55307 120
AnnaBridge 167:e84263d55307 121 uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address) {
AnnaBridge 167:e84263d55307 122 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 123 return MBED_FLASH_INVALID_SIZE;
AnnaBridge 167:e84263d55307 124 } else {
AnnaBridge 168:9672193075cf 125 /* sector composed of N pages */
AnnaBridge 167:e84263d55307 126 return (NUM_PAGES_IN_SECTOR * FLASH_PAGE_SIZE);
AnnaBridge 167:e84263d55307 127 }
AnnaBridge 167:e84263d55307 128 }
AnnaBridge 167:e84263d55307 129
AnnaBridge 167:e84263d55307 130 uint32_t flash_get_page_size(const flash_t *obj) {
AnnaBridge 175:b96e65c34a4d 131 /* Page size is the minimum programable size, which 4 bytes */
AnnaBridge 175:b96e65c34a4d 132 return 4;
AnnaBridge 167:e84263d55307 133 }
AnnaBridge 167:e84263d55307 134
AnnaBridge 167:e84263d55307 135 uint32_t flash_get_start_address(const flash_t *obj) {
AnnaBridge 167:e84263d55307 136 return FLASH_BASE;
AnnaBridge 167:e84263d55307 137 }
AnnaBridge 167:e84263d55307 138
AnnaBridge 167:e84263d55307 139 uint32_t flash_get_size(const flash_t *obj) {
AnnaBridge 167:e84263d55307 140 return FLASH_SIZE;
AnnaBridge 167:e84263d55307 141 }
AnnaBridge 167:e84263d55307 142
AnnaBridge 167:e84263d55307 143 #endif