2014-05-03 22:27:38 +00:00
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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2014-03-17 13:31:35 +00:00
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#include <stdint.h>
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#include <string.h>
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2015-01-01 21:06:20 +00:00
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#include "py/obj.h"
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2016-02-10 16:21:38 +00:00
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#include "py/runtime.h"
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#include "lib/fatfs/ff.h"
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#include "extmod/fsusermount.h"
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2014-03-17 13:31:35 +00:00
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#include "systick.h"
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#include "led.h"
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#include "flash.h"
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#include "storage.h"
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2015-10-31 17:44:20 +00:00
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#include "irq.h"
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2014-03-17 13:31:35 +00:00
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2015-04-18 21:08:16 +00:00
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#if defined(STM32F405xx) || defined(STM32F407xx)
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2015-04-18 15:27:53 +00:00
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2014-03-17 13:31:35 +00:00
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#define CACHE_MEM_START_ADDR (0x10000000) // CCM data RAM, 64k
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2015-04-18 15:27:53 +00:00
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#define FLASH_SECTOR_SIZE_MAX (0x10000) // 64k max, size of CCM
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2015-06-27 22:27:23 +00:00
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#define FLASH_MEM_SEG1_START_ADDR (0x08004000) // sector 1
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#define FLASH_MEM_SEG1_NUM_BLOCKS (224) // sectors 1,2,3,4: 16k+16k+16k+64k=112k
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// enable this to get an extra 64k of storage (uses the last sector of the flash)
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#if 0
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#define FLASH_MEM_SEG2_START_ADDR (0x080e0000) // sector 11
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#define FLASH_MEM_SEG2_NUM_BLOCKS (128) // sector 11: 128k
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#endif
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2015-04-18 15:27:53 +00:00
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2015-04-18 21:15:59 +00:00
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#elif defined(STM32F401xE) || defined(STM32F411xE)
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2015-04-18 15:27:53 +00:00
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STATIC byte flash_cache_mem[0x4000] __attribute__((aligned(4))); // 16k
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#define CACHE_MEM_START_ADDR (&flash_cache_mem[0])
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#define FLASH_SECTOR_SIZE_MAX (0x4000) // 16k max due to size of cache buffer
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2015-06-27 22:27:23 +00:00
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#define FLASH_MEM_SEG1_START_ADDR (0x08004000) // sector 1
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#define FLASH_MEM_SEG1_NUM_BLOCKS (128) // sectors 1,2,3,4: 16k+16k+16k+16k(of 64k)=64k
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2015-04-18 15:27:53 +00:00
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2015-11-24 13:35:24 +00:00
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#elif defined(STM32F429xx)
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#define CACHE_MEM_START_ADDR (0x10000000) // CCM data RAM, 64k
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#define FLASH_SECTOR_SIZE_MAX (0x10000) // 64k max, size of CCM
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#define FLASH_MEM_SEG1_START_ADDR (0x08004000) // sector 1
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#define FLASH_MEM_SEG1_NUM_BLOCKS (224) // sectors 1,2,3,4: 16k+16k+16k+64k=112k
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2016-02-09 04:36:51 +00:00
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#elif defined(STM32F439xx)
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#define CACHE_MEM_START_ADDR (0x10000000) // CCM data RAM, 64k
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#define FLASH_SECTOR_SIZE_MAX (0x10000) // 64k max, size of CCM
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#define FLASH_MEM_SEG1_START_ADDR (0x08100000) // sector 12
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#define FLASH_MEM_SEG1_NUM_BLOCKS (384) // sectors 12,13,14,15,16,17: 16k+16k+16k+16k+64k+64k(of 128k)=192k
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#define FLASH_MEM_SEG2_START_ADDR (0x08140000) // sector 18
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#define FLASH_MEM_SEG2_NUM_BLOCKS (128) // sector 18: 64k(of 128k)
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2015-07-28 18:13:33 +00:00
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#elif defined(STM32F746xx)
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// The STM32F746 doesn't really have CCRAM, so we use the 64K DTCM for this.
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#define CACHE_MEM_START_ADDR (0x20000000) // DTCM data RAM, 64k
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2015-07-30 16:50:58 +00:00
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#define FLASH_SECTOR_SIZE_MAX (0x08000) // 32k max
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#define FLASH_MEM_SEG1_START_ADDR (0x08008000) // sector 1
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#define FLASH_MEM_SEG1_NUM_BLOCKS (192) // sectors 1,2,3: 32k+32k+32=96k
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2015-07-28 18:13:33 +00:00
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2016-03-22 16:49:39 +00:00
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#elif defined(STM32L476xx)
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// The STM32L476 doesn't have CCRAM, so we use the 32K SRAM2 for this.
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#define CACHE_MEM_START_ADDR (0x10000000) // SRAM2 data RAM, 32k
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#define FLASH_SECTOR_SIZE_MAX (0x00800) // 2k max
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#define FLASH_MEM_SEG1_START_ADDR (0x08000800) // sector 1
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#define FLASH_MEM_SEG1_NUM_BLOCKS (252) // 1 Block=512 Bytes Reserve 126 kBytes
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2015-04-18 15:27:53 +00:00
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#else
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#error "no storage support for this MCU"
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#endif
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2014-03-17 13:31:35 +00:00
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2015-06-27 22:27:23 +00:00
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#if !defined(FLASH_MEM_SEG2_START_ADDR)
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#define FLASH_MEM_SEG2_START_ADDR (0) // no second segment
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#define FLASH_MEM_SEG2_NUM_BLOCKS (0) // no second segment
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#endif
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#define FLASH_PART1_START_BLOCK (0x100)
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#define FLASH_PART1_NUM_BLOCKS (FLASH_MEM_SEG1_NUM_BLOCKS + FLASH_MEM_SEG2_NUM_BLOCKS)
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2014-04-16 22:08:36 +00:00
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#define FLASH_FLAG_DIRTY (1)
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#define FLASH_FLAG_FORCE_WRITE (2)
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#define FLASH_FLAG_ERASED (4)
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2014-03-17 13:31:35 +00:00
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static bool flash_is_initialised = false;
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2014-04-16 22:08:36 +00:00
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static __IO uint8_t flash_flags = 0;
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2014-03-17 13:31:35 +00:00
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static uint32_t flash_cache_sector_id;
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static uint32_t flash_cache_sector_start;
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static uint32_t flash_cache_sector_size;
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static uint32_t flash_tick_counter_last_write;
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static void flash_cache_flush(void) {
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2014-04-16 22:08:36 +00:00
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if (flash_flags & FLASH_FLAG_DIRTY) {
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flash_flags |= FLASH_FLAG_FORCE_WRITE;
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while (flash_flags & FLASH_FLAG_DIRTY) {
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NVIC->STIR = FLASH_IRQn;
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}
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2014-03-17 13:31:35 +00:00
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}
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}
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static uint8_t *flash_cache_get_addr_for_write(uint32_t flash_addr) {
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uint32_t flash_sector_start;
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uint32_t flash_sector_size;
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uint32_t flash_sector_id = flash_get_sector_info(flash_addr, &flash_sector_start, &flash_sector_size);
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2015-04-18 15:27:53 +00:00
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if (flash_sector_size > FLASH_SECTOR_SIZE_MAX) {
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flash_sector_size = FLASH_SECTOR_SIZE_MAX;
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}
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2014-03-17 13:31:35 +00:00
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if (flash_cache_sector_id != flash_sector_id) {
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flash_cache_flush();
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memcpy((void*)CACHE_MEM_START_ADDR, (const void*)flash_sector_start, flash_sector_size);
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flash_cache_sector_id = flash_sector_id;
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flash_cache_sector_start = flash_sector_start;
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flash_cache_sector_size = flash_sector_size;
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}
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2014-04-16 22:08:36 +00:00
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flash_flags |= FLASH_FLAG_DIRTY;
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led_state(PYB_LED_R1, 1); // indicate a dirty cache with LED on
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flash_tick_counter_last_write = HAL_GetTick();
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2014-03-17 13:31:35 +00:00
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return (uint8_t*)CACHE_MEM_START_ADDR + flash_addr - flash_sector_start;
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}
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static uint8_t *flash_cache_get_addr_for_read(uint32_t flash_addr) {
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uint32_t flash_sector_start;
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uint32_t flash_sector_size;
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uint32_t flash_sector_id = flash_get_sector_info(flash_addr, &flash_sector_start, &flash_sector_size);
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if (flash_cache_sector_id == flash_sector_id) {
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// in cache, copy from there
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return (uint8_t*)CACHE_MEM_START_ADDR + flash_addr - flash_sector_start;
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}
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// not in cache, copy straight from flash
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return (uint8_t*)flash_addr;
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}
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void storage_init(void) {
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if (!flash_is_initialised) {
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2014-04-16 22:08:36 +00:00
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flash_flags = 0;
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2014-03-17 13:31:35 +00:00
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flash_cache_sector_id = 0;
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flash_tick_counter_last_write = 0;
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2014-04-16 22:08:36 +00:00
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flash_is_initialised = true;
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2014-03-17 13:31:35 +00:00
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}
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2014-04-16 22:08:36 +00:00
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// Enable the flash IRQ, which is used to also call our storage IRQ handler
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// It needs to go at a higher priority than all those components that rely on
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// the flash storage (eg higher than USB MSC).
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2015-10-31 17:44:20 +00:00
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HAL_NVIC_SetPriority(FLASH_IRQn, IRQ_PRI_FLASH, IRQ_SUBPRI_FLASH);
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2014-04-16 22:08:36 +00:00
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HAL_NVIC_EnableIRQ(FLASH_IRQn);
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2014-03-17 13:31:35 +00:00
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}
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uint32_t storage_get_block_size(void) {
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return FLASH_BLOCK_SIZE;
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}
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uint32_t storage_get_block_count(void) {
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return FLASH_PART1_START_BLOCK + FLASH_PART1_NUM_BLOCKS;
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}
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2014-04-16 22:08:36 +00:00
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void storage_irq_handler(void) {
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if (!(flash_flags & FLASH_FLAG_DIRTY)) {
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return;
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}
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// This code uses interrupts to erase the flash
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/*
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if (flash_erase_state == 0) {
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flash_erase_it(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
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flash_erase_state = 1;
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return;
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}
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if (flash_erase_state == 1) {
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// wait for erase
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// TODO add timeout
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#define flash_erase_done() (__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY) == RESET)
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if (!flash_erase_done()) {
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return;
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}
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flash_erase_state = 2;
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}
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*/
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// This code erases the flash directly, waiting for it to finish
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if (!(flash_flags & FLASH_FLAG_ERASED)) {
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flash_erase(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
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flash_flags |= FLASH_FLAG_ERASED;
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return;
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}
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// If not a forced write, wait at least 5 seconds after last write to flush
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// On file close and flash unmount we get a forced write, so we can afford to wait a while
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if ((flash_flags & FLASH_FLAG_FORCE_WRITE) || sys_tick_has_passed(flash_tick_counter_last_write, 5000)) {
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// sync the cache RAM buffer by writing it to the flash page
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flash_write(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
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// clear the flash flags now that we have a clean cache
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flash_flags = 0;
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// indicate a clean cache with LED off
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led_state(PYB_LED_R1, 0);
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}
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2014-03-17 13:31:35 +00:00
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}
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void storage_flush(void) {
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flash_cache_flush();
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}
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static void build_partition(uint8_t *buf, int boot, int type, uint32_t start_block, uint32_t num_blocks) {
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buf[0] = boot;
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if (num_blocks == 0) {
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buf[1] = 0;
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buf[2] = 0;
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buf[3] = 0;
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} else {
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buf[1] = 0xff;
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buf[2] = 0xff;
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buf[3] = 0xff;
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}
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buf[4] = type;
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if (num_blocks == 0) {
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buf[5] = 0;
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buf[6] = 0;
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buf[7] = 0;
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} else {
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buf[5] = 0xff;
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buf[6] = 0xff;
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buf[7] = 0xff;
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}
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buf[8] = start_block;
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buf[9] = start_block >> 8;
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buf[10] = start_block >> 16;
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buf[11] = start_block >> 24;
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buf[12] = num_blocks;
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buf[13] = num_blocks >> 8;
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buf[14] = num_blocks >> 16;
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buf[15] = num_blocks >> 24;
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}
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2015-06-27 22:27:23 +00:00
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static uint32_t convert_block_to_flash_addr(uint32_t block) {
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if (FLASH_PART1_START_BLOCK <= block && block < FLASH_PART1_START_BLOCK + FLASH_PART1_NUM_BLOCKS) {
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// a block in partition 1
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block -= FLASH_PART1_START_BLOCK;
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if (block < FLASH_MEM_SEG1_NUM_BLOCKS) {
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return FLASH_MEM_SEG1_START_ADDR + block * FLASH_BLOCK_SIZE;
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} else if (block < FLASH_MEM_SEG1_NUM_BLOCKS + FLASH_MEM_SEG2_NUM_BLOCKS) {
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return FLASH_MEM_SEG2_START_ADDR + (block - FLASH_MEM_SEG1_NUM_BLOCKS) * FLASH_BLOCK_SIZE;
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}
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// can add more flash segments here if needed, following above pattern
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}
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// bad block
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return -1;
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}
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2014-03-17 13:31:35 +00:00
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bool storage_read_block(uint8_t *dest, uint32_t block) {
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//printf("RD %u\n", block);
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if (block == 0) {
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// fake the MBR so we can decide on our own partition table
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for (int i = 0; i < 446; i++) {
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dest[i] = 0;
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}
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build_partition(dest + 446, 0, 0x01 /* FAT12 */, FLASH_PART1_START_BLOCK, FLASH_PART1_NUM_BLOCKS);
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build_partition(dest + 462, 0, 0, 0, 0);
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build_partition(dest + 478, 0, 0, 0, 0);
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build_partition(dest + 494, 0, 0, 0, 0);
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dest[510] = 0x55;
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dest[511] = 0xaa;
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|
|
return true;
|
|
|
|
|
2015-06-27 22:27:23 +00:00
|
|
|
} else {
|
2014-03-17 13:31:35 +00:00
|
|
|
// non-MBR block, get data from flash memory, possibly via cache
|
2015-06-27 22:27:23 +00:00
|
|
|
uint32_t flash_addr = convert_block_to_flash_addr(block);
|
|
|
|
if (flash_addr == -1) {
|
|
|
|
// bad block number
|
|
|
|
return false;
|
|
|
|
}
|
2014-03-17 13:31:35 +00:00
|
|
|
uint8_t *src = flash_cache_get_addr_for_read(flash_addr);
|
|
|
|
memcpy(dest, src, FLASH_BLOCK_SIZE);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
bool storage_write_block(const uint8_t *src, uint32_t block) {
|
|
|
|
//printf("WR %u\n", block);
|
|
|
|
if (block == 0) {
|
|
|
|
// can't write MBR, but pretend we did
|
|
|
|
return true;
|
|
|
|
|
2015-06-27 22:27:23 +00:00
|
|
|
} else {
|
2014-03-17 13:31:35 +00:00
|
|
|
// non-MBR block, copy to cache
|
2015-06-27 22:27:23 +00:00
|
|
|
uint32_t flash_addr = convert_block_to_flash_addr(block);
|
|
|
|
if (flash_addr == -1) {
|
|
|
|
// bad block number
|
|
|
|
return false;
|
|
|
|
}
|
2014-03-17 13:31:35 +00:00
|
|
|
uint8_t *dest = flash_cache_get_addr_for_write(flash_addr);
|
|
|
|
memcpy(dest, src, FLASH_BLOCK_SIZE);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
2016-02-10 16:21:38 +00:00
|
|
|
|
|
|
|
mp_uint_t storage_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
|
|
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
|
|
if (!storage_read_block(dest + i * FLASH_BLOCK_SIZE, block_num + i)) {
|
|
|
|
return 1; // error
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0; // success
|
|
|
|
}
|
|
|
|
|
|
|
|
mp_uint_t storage_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
|
|
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
|
|
if (!storage_write_block(src + i * FLASH_BLOCK_SIZE, block_num + i)) {
|
|
|
|
return 1; // error
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0; // success
|
|
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
// MicroPython bindings
|
|
|
|
//
|
|
|
|
// Expose the flash as an object with the block protocol.
|
|
|
|
|
|
|
|
// there is a singleton Flash object
|
|
|
|
STATIC const mp_obj_base_t pyb_flash_obj = {&pyb_flash_type};
|
|
|
|
|
|
|
|
STATIC mp_obj_t pyb_flash_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
|
|
// check arguments
|
|
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
|
|
|
|
|
|
// return singleton object
|
|
|
|
return (mp_obj_t)&pyb_flash_obj;
|
|
|
|
}
|
|
|
|
|
|
|
|
STATIC mp_obj_t pyb_flash_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
|
|
|
|
mp_buffer_info_t bufinfo;
|
|
|
|
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
|
|
|
|
mp_uint_t ret = storage_read_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FLASH_BLOCK_SIZE);
|
|
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_flash_readblocks_obj, pyb_flash_readblocks);
|
|
|
|
|
|
|
|
STATIC mp_obj_t pyb_flash_writeblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
|
|
|
|
mp_buffer_info_t bufinfo;
|
|
|
|
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
|
|
|
|
mp_uint_t ret = storage_write_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / FLASH_BLOCK_SIZE);
|
|
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_flash_writeblocks_obj, pyb_flash_writeblocks);
|
|
|
|
|
|
|
|
STATIC mp_obj_t pyb_flash_ioctl(mp_obj_t self, mp_obj_t cmd_in, mp_obj_t arg_in) {
|
|
|
|
mp_int_t cmd = mp_obj_get_int(cmd_in);
|
|
|
|
switch (cmd) {
|
2016-02-10 23:36:19 +00:00
|
|
|
case BP_IOCTL_INIT: storage_init(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
|
|
case BP_IOCTL_DEINIT: storage_flush(); return MP_OBJ_NEW_SMALL_INT(0); // TODO properly
|
|
|
|
case BP_IOCTL_SYNC: storage_flush(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
|
|
case BP_IOCTL_SEC_COUNT: return MP_OBJ_NEW_SMALL_INT(storage_get_block_count());
|
|
|
|
case BP_IOCTL_SEC_SIZE: return MP_OBJ_NEW_SMALL_INT(storage_get_block_size());
|
2016-02-10 16:21:38 +00:00
|
|
|
default: return mp_const_none;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_flash_ioctl_obj, pyb_flash_ioctl);
|
|
|
|
|
|
|
|
STATIC const mp_map_elem_t pyb_flash_locals_dict_table[] = {
|
|
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_readblocks), (mp_obj_t)&pyb_flash_readblocks_obj },
|
|
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_writeblocks), (mp_obj_t)&pyb_flash_writeblocks_obj },
|
|
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_ioctl), (mp_obj_t)&pyb_flash_ioctl_obj },
|
|
|
|
};
|
|
|
|
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_flash_locals_dict, pyb_flash_locals_dict_table);
|
|
|
|
|
|
|
|
const mp_obj_type_t pyb_flash_type = {
|
|
|
|
{ &mp_type_type },
|
|
|
|
.name = MP_QSTR_Flash,
|
|
|
|
.make_new = pyb_flash_make_new,
|
|
|
|
.locals_dict = (mp_obj_t)&pyb_flash_locals_dict,
|
|
|
|
};
|
2016-02-10 16:32:57 +00:00
|
|
|
|
|
|
|
void pyb_flash_init_vfs(fs_user_mount_t *vfs) {
|
|
|
|
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
|
|
|
|
vfs->readblocks[0] = (mp_obj_t)&pyb_flash_readblocks_obj;
|
|
|
|
vfs->readblocks[1] = (mp_obj_t)&pyb_flash_obj;
|
|
|
|
vfs->readblocks[2] = (mp_obj_t)storage_read_blocks; // native version
|
|
|
|
vfs->writeblocks[0] = (mp_obj_t)&pyb_flash_writeblocks_obj;
|
|
|
|
vfs->writeblocks[1] = (mp_obj_t)&pyb_flash_obj;
|
|
|
|
vfs->writeblocks[2] = (mp_obj_t)storage_write_blocks; // native version
|
|
|
|
vfs->u.ioctl[0] = (mp_obj_t)&pyb_flash_ioctl_obj;
|
|
|
|
vfs->u.ioctl[1] = (mp_obj_t)&pyb_flash_obj;
|
|
|
|
}
|