ccbb5e84f9
Docs are here: http://tannewt-micropython.readthedocs.io/en/microcontroller/ It differs from upstream's machine in the following ways: * Python API is identical across ports due to code structure. (Lives in shared-bindings) * Focuses on abstracting common functionality (AnalogIn) and not representing structure (ADC). * Documentation lives with code making it easy to ensure they match. * Pin is split into references (board.D13 and microcontroller.pin.PA17) and functionality (DigitalInOut). * All nativeio classes claim underlying hardware resources when inited on construction, support Context Managers (aka with statements) and have deinit methods which release the claimed hardware. * All constructors take pin references rather than peripheral ids. Its up to the implementation to find hardware or throw and exception.
663 lines
24 KiB
C
663 lines
24 KiB
C
/*
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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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#include "spi_flash.h"
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#include <stdint.h>
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#include <string.h>
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#include "asf/sam0/drivers/sercom/spi/spi.h"
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#include "py/gc.h"
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#include "py/obj.h"
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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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#include "neopixel_status.h"
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#define SPI_FLASH_PART1_START_BLOCK (0x1)
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#define NO_SECTOR_LOADED 0xFFFFFFFF
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#define CMD_READ_JEDEC_ID 0x9f
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#define CMD_READ_DATA 0x03
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#define CMD_SECTOR_ERASE 0x20
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// #define CMD_SECTOR_ERASE CMD_READ_JEDEC_ID
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#define CMD_ENABLE_WRITE 0x06
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#define CMD_PAGE_PROGRAM 0x02
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// #define CMD_PAGE_PROGRAM CMD_READ_JEDEC_ID
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#define CMD_READ_STATUS 0x05
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static bool spi_flash_is_initialised = false;
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struct spi_module spi_flash_instance;
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// The total size of the flash.
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static uint32_t flash_size;
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// The erase sector size.
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static uint32_t sector_size;
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// The page size. Its the maximum number of bytes that can be written at once.
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static uint32_t page_size;
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// The currently cached sector in the cache, ram or flash based.
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static uint32_t current_sector;
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// Track which blocks (up to 32) in the current sector currently live in the
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// cache.
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static uint32_t dirty_mask;
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// We use this when we can allocate the whole cache in RAM.
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static uint8_t** ram_cache;
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// Address of the scratch flash sector.
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#define SCRATCH_SECTOR (flash_size - sector_size)
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// Enable the flash over SPI.
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static void flash_enable(void) {
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port_pin_set_output_level(SPI_FLASH_CS, false);
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}
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// Disable the flash over SPI.
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static void flash_disable(void) {
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port_pin_set_output_level(SPI_FLASH_CS, true);
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}
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// Wait until both the write enable and write in progress bits have cleared.
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static bool wait_for_flash_ready(void) {
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uint8_t status_request[2] = {CMD_READ_STATUS, 0x00};
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uint8_t response[2] = {0x00, 0x01};
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enum status_code status = STATUS_OK;
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// Both the write enable and write in progress bits should be low.
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while (status == STATUS_OK && ((response[1] & 0x1) == 1 || (response[1] & 0x2) == 2)) {
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flash_enable();
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status = spi_transceive_buffer_wait(&spi_flash_instance, status_request, response, 2);
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flash_disable();
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}
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return status == STATUS_OK;
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}
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// Turn on the write enable bit so we can program and erase the flash.
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static bool write_enable(void) {
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flash_enable();
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uint8_t command = CMD_ENABLE_WRITE;
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enum status_code status = spi_write_buffer_wait(&spi_flash_instance, &command, 1);
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flash_disable();
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return status == STATUS_OK;
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}
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// Pack the low 24 bits of the address into a uint8_t array.
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static void address_to_bytes(uint32_t address, uint8_t* bytes) {
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bytes[0] = (address >> 16) & 0xff;
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bytes[1] = (address >> 8) & 0xff;
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bytes[2] = address & 0xff;
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}
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// Read data_length's worth of bytes starting at address into data.
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static bool read_flash(uint32_t address, uint8_t* data, uint32_t data_length) {
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wait_for_flash_ready();
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enum status_code status;
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// We can read as much as we want sequentially.
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uint8_t read_request[4] = {CMD_READ_DATA, 0x00, 0x00, 0x00};
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address_to_bytes(address, read_request + 1);
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flash_enable();
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status = spi_write_buffer_wait(&spi_flash_instance, read_request, 4);
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if (status == STATUS_OK) {
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status = spi_read_buffer_wait(&spi_flash_instance, data, data_length, 0x00);
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}
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flash_disable();
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return status == STATUS_OK;
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}
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// Writes data_length's worth of bytes starting at address from data. Assumes
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// that the sector that address resides in has already been erased. So make sure
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// to run erase_sector.
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static bool write_flash(uint32_t address, const uint8_t* data, uint32_t data_length) {
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if (page_size == 0) {
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return false;
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}
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for (uint32_t bytes_written = 0;
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bytes_written < data_length;
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bytes_written += page_size) {
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if (!wait_for_flash_ready() || !write_enable()) {
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return false;
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}
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flash_enable();
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uint8_t command[4] = {CMD_PAGE_PROGRAM, 0x00, 0x00, 0x00};
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address_to_bytes(address + bytes_written, command + 1);
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enum status_code status;
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status = spi_write_buffer_wait(&spi_flash_instance, command, 4);
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if (status == STATUS_OK) {
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status = spi_write_buffer_wait(&spi_flash_instance, data + bytes_written, page_size);
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}
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flash_disable();
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if (status != STATUS_OK) {
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return false;
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}
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}
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return true;
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}
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// Erases the given sector. Make sure you copied all of the data out of it you
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// need! Also note, sector_address is really 24 bits.
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static bool erase_sector(uint32_t sector_address) {
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// Before we erase the sector we need to wait for any writes to finish and
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// and then enable the write again.
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if (!wait_for_flash_ready() || !write_enable()) {
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return false;
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}
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uint8_t erase_request[4] = {CMD_SECTOR_ERASE, 0x00, 0x00, 0x00};
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address_to_bytes(sector_address, erase_request + 1);
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flash_enable();
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enum status_code status = spi_write_buffer_wait(&spi_flash_instance, erase_request, 4);
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flash_disable();
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return status == STATUS_OK;
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}
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// Sector is really 24 bits.
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static bool copy_block(uint32_t src_address, uint32_t dest_address) {
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// Copy page by page to minimize RAM buffer.
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uint8_t buffer[page_size];
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for (uint32_t i = 0; i < FLASH_BLOCK_SIZE / page_size; i++) {
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if (!read_flash(src_address + i * page_size, buffer, page_size)) {
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return false;
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}
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if (!write_flash(dest_address + i * page_size, buffer, page_size)) {
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return false;
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}
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}
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return true;
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}
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void spi_flash_init(void) {
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if (!spi_flash_is_initialised) {
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struct spi_config config_spi_master;
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spi_get_config_defaults(&config_spi_master);
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config_spi_master.mux_setting = SPI_FLASH_MUX_SETTING;
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config_spi_master.pinmux_pad0 = SPI_FLASH_PAD0_PINMUX;
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config_spi_master.pinmux_pad1 = SPI_FLASH_PAD1_PINMUX;
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config_spi_master.pinmux_pad2 = SPI_FLASH_PAD2_PINMUX;
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config_spi_master.pinmux_pad3 = SPI_FLASH_PAD3_PINMUX;
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config_spi_master.mode_specific.master.baudrate = SPI_FLASH_BAUDRATE;
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spi_init(&spi_flash_instance, SPI_FLASH_SERCOM, &config_spi_master);
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spi_enable(&spi_flash_instance);
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// Manage chip select ourselves.
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struct port_config pin_conf;
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port_get_config_defaults(&pin_conf);
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pin_conf.direction = PORT_PIN_DIR_OUTPUT;
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port_pin_set_config(SPI_FLASH_CS, &pin_conf);
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flash_disable();
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// Activity LED for flash writes.
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#ifdef MICROPY_HW_LED_MSC
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port_pin_set_config(MICROPY_HW_LED_MSC, &pin_conf);
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port_pin_set_output_level(MICROPY_HW_LED_MSC, false);
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#endif
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uint8_t jedec_id_request[4] = {CMD_READ_JEDEC_ID, 0x00, 0x00, 0x00};
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uint8_t response[4] = {0x00, 0x00, 0x00, 0x00};
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flash_enable();
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volatile enum status_code status = spi_transceive_buffer_wait(&spi_flash_instance, jedec_id_request, response, 4);
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flash_disable();
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(void) status;
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if (response[1] == 0x01 && response[2] == 0x40 && response[3] == 0x15) {
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flash_size = 1 << 21; // 2 MiB
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sector_size = 1 << 12; // 4 KiB
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page_size = 256; // 256 bytes
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} else {
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// Unknown flash chip!
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flash_size = 0;
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}
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current_sector = NO_SECTOR_LOADED;
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dirty_mask = 0;
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ram_cache = NULL;
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spi_flash_is_initialised = true;
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}
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}
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// The size of each individual block.
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uint32_t spi_flash_get_block_size(void) {
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return FLASH_BLOCK_SIZE;
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}
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// The total number of available blocks.
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uint32_t spi_flash_get_block_count(void) {
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// We subtract one erase sector size because we may use it as a staging area
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// for writes.
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return SPI_FLASH_PART1_START_BLOCK + (flash_size - sector_size) / FLASH_BLOCK_SIZE;
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}
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// Flush the cache that was written to the scratch portion of flash. Only used
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// when ram is tight.
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static bool flush_scratch_flash(void) {
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// First, copy out any blocks that we haven't touched from the sector we've
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// cached.
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bool copy_to_scratch_ok = true;
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for (uint8_t i = 0; i < sector_size / FLASH_BLOCK_SIZE; i++) {
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if ((dirty_mask & (1 << i)) == 0) {
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copy_to_scratch_ok = copy_to_scratch_ok &&
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copy_block(current_sector + i * FLASH_BLOCK_SIZE,
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SCRATCH_SECTOR + i * FLASH_BLOCK_SIZE);
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}
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}
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if (!copy_to_scratch_ok) {
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// TODO(tannewt): Do more here. We opted to not erase and copy bad data
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// in. We still risk losing the data written to the scratch sector.
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return false;
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}
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// Second, erase the current sector.
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erase_sector(current_sector);
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// Finally, copy the new version into it.
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for (uint8_t i = 0; i < sector_size / FLASH_BLOCK_SIZE; i++) {
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copy_block(SCRATCH_SECTOR + i * FLASH_BLOCK_SIZE,
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current_sector + i * FLASH_BLOCK_SIZE);
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}
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return true;
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}
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// Attempts to allocate a new set of page buffers for caching a full sector in
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// ram. Each page is allocated separately so that the GC doesn't need to provide
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// one huge block. We can free it as we write if we want to also.
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static bool allocate_ram_cache(void) {
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uint8_t blocks_per_sector = sector_size / FLASH_BLOCK_SIZE;
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uint8_t pages_per_block = FLASH_BLOCK_SIZE / page_size;
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ram_cache = gc_alloc(blocks_per_sector * pages_per_block * sizeof(uint32_t), false);
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if (ram_cache == NULL) {
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return false;
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}
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// Declare i and j outside the loops in case we fail to allocate everything
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// we need. In that case we'll give it back.
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uint8_t i = 0;
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uint8_t j = 0;
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bool success = true;
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for (i = 0; i < blocks_per_sector; i++) {
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for (j = 0; j < pages_per_block; j++) {
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uint8_t *page_cache = gc_alloc(page_size, false);
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if (page_cache == NULL) {
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success = false;
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break;
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}
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ram_cache[i * pages_per_block + j] = page_cache;
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}
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if (!success) {
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break;
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}
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}
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// We couldn't allocate enough so give back what we got.
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if (!success) {
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// We add 1 so that we delete 0 when i is 1. Going to zero (i >= 0)
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// would never stop because i is unsigned.
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i++;
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for (; i > 0; i--) {
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for (; j > 0; j--) {
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gc_free(ram_cache[(i - 1) * pages_per_block + (j - 1)]);
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}
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j = pages_per_block;
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}
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gc_free(ram_cache);
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ram_cache = NULL;
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}
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return success;
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}
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// Flush the cached sector from ram onto the flash. We'll free the cache unless
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// keep_cache is true.
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static bool flush_ram_cache(bool keep_cache) {
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// First, copy out any blocks that we haven't touched from the sector
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// we've cached. If we don't do this we'll erase the data during the sector
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// erase below.
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bool copy_to_ram_ok = true;
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uint8_t pages_per_block = FLASH_BLOCK_SIZE / page_size;
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for (uint8_t i = 0; i < sector_size / FLASH_BLOCK_SIZE; i++) {
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if ((dirty_mask & (1 << i)) == 0) {
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for (uint8_t j = 0; j < pages_per_block; j++) {
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copy_to_ram_ok = read_flash(
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current_sector + (i * pages_per_block + j) * page_size,
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ram_cache[i * pages_per_block + j],
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page_size);
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if (!copy_to_ram_ok) {
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break;
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}
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}
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}
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if (!copy_to_ram_ok) {
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break;
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}
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}
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if (!copy_to_ram_ok) {
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return false;
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}
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// Second, erase the current sector.
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erase_sector(current_sector);
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// Lastly, write all the data in ram that we've cached.
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for (uint8_t i = 0; i < sector_size / FLASH_BLOCK_SIZE; i++) {
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for (uint8_t j = 0; j < pages_per_block; j++) {
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write_flash(current_sector + (i * pages_per_block + j) * page_size,
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ram_cache[i * pages_per_block + j],
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page_size);
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if (!keep_cache) {
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gc_free(ram_cache[i * pages_per_block + j]);
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}
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}
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}
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// We're done with the cache for now so give it back.
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if (!keep_cache) {
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gc_free(ram_cache);
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ram_cache = NULL;
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}
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return true;
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}
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// Delegates to the correct flash flush method depending on the existing cache.
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static void spi_flash_flush_keep_cache(bool keep_cache) {
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if (current_sector == NO_SECTOR_LOADED) {
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return;
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}
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#ifdef MICROPY_HW_LED_MSC
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port_pin_set_output_level(MICROPY_HW_LED_MSC, true);
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#endif
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#ifdef MICROPY_HW_NEOPIXEL
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temp_status_color(0x8f, 0x00, 0x00);
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#endif
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// If we've cached to the flash itself flush from there.
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if (ram_cache == NULL) {
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flush_scratch_flash();
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} else {
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flush_ram_cache(keep_cache);
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}
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current_sector = NO_SECTOR_LOADED;
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#ifdef MICROPY_HW_NEOPIXEL
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clear_temp_status();
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#endif
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#ifdef MICROPY_HW_LED_MSC
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port_pin_set_output_level(MICROPY_HW_LED_MSC, false);
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#endif
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}
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// External flash function used. If called externally we assume we won't need
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// the cache after.
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void spi_flash_flush(void) {
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spi_flash_flush_keep_cache(false);
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}
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// Builds a partition entry for the MBR.
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static void build_partition(uint8_t *buf, int boot, int type,
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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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static int32_t convert_block_to_flash_addr(uint32_t block) {
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if (SPI_FLASH_PART1_START_BLOCK <= block && block < spi_flash_get_block_count()) {
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// a block in partition 1
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block -= SPI_FLASH_PART1_START_BLOCK;
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return block * FLASH_BLOCK_SIZE;
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}
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// bad block
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return -1;
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}
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bool spi_flash_read_block(uint8_t *dest, uint32_t block) {
|
|
if (block == 0) {
|
|
// Fake the MBR so we can decide on our own partition table
|
|
for (int i = 0; i < 446; i++) {
|
|
dest[i] = 0;
|
|
}
|
|
|
|
build_partition(dest + 446, 0, 0x01 /* FAT12 */,
|
|
SPI_FLASH_PART1_START_BLOCK,
|
|
spi_flash_get_block_count() - SPI_FLASH_PART1_START_BLOCK);
|
|
build_partition(dest + 462, 0, 0, 0, 0);
|
|
build_partition(dest + 478, 0, 0, 0, 0);
|
|
build_partition(dest + 494, 0, 0, 0, 0);
|
|
|
|
dest[510] = 0x55;
|
|
dest[511] = 0xaa;
|
|
|
|
return true;
|
|
} else if (block < SPI_FLASH_PART1_START_BLOCK) {
|
|
memset(dest, 0, FLASH_BLOCK_SIZE);
|
|
return true;
|
|
} else {
|
|
// Non-MBR block, get data from flash memory.
|
|
int32_t address = convert_block_to_flash_addr(block);
|
|
if (address == -1) {
|
|
// bad block number
|
|
return false;
|
|
}
|
|
|
|
// Mask out the lower bits that designate the address within the sector.
|
|
uint32_t this_sector = address & (~(sector_size - 1));
|
|
uint8_t block_index = (address / FLASH_BLOCK_SIZE) % (sector_size / FLASH_BLOCK_SIZE);
|
|
uint8_t mask = 1 << (block_index);
|
|
// We're reading from the currently cached sector.
|
|
if (current_sector == this_sector && (mask & dirty_mask) > 0) {
|
|
if (ram_cache != NULL) {
|
|
uint8_t pages_per_block = FLASH_BLOCK_SIZE / page_size;
|
|
for (int i = 0; i < pages_per_block; i++) {
|
|
memcpy(dest + i * page_size,
|
|
ram_cache[block_index * pages_per_block + i],
|
|
page_size);
|
|
}
|
|
return true;
|
|
} else {
|
|
uint32_t scratch_address = SCRATCH_SECTOR + block_index * FLASH_BLOCK_SIZE;
|
|
return read_flash(scratch_address, dest, FLASH_BLOCK_SIZE);
|
|
}
|
|
}
|
|
return read_flash(address, dest, FLASH_BLOCK_SIZE);
|
|
}
|
|
}
|
|
|
|
bool spi_flash_write_block(const uint8_t *data, uint32_t block) {
|
|
if (block < SPI_FLASH_PART1_START_BLOCK) {
|
|
// Fake writing below the flash partition.
|
|
return true;
|
|
} else {
|
|
// Non-MBR block, copy to cache
|
|
int32_t address = convert_block_to_flash_addr(block);
|
|
if (address == -1) {
|
|
// bad block number
|
|
return false;
|
|
}
|
|
// Wait for any previous writes to finish.
|
|
wait_for_flash_ready();
|
|
// Mask out the lower bits that designate the address within the sector.
|
|
uint32_t this_sector = address & (~(sector_size - 1));
|
|
uint8_t block_index = (address / FLASH_BLOCK_SIZE) % (sector_size / FLASH_BLOCK_SIZE);
|
|
uint8_t mask = 1 << (block_index);
|
|
// Flush the cache if we're moving onto a sector our we're writing the
|
|
// same block again.
|
|
if (current_sector != this_sector || (mask & dirty_mask) > 0) {
|
|
if (current_sector != NO_SECTOR_LOADED) {
|
|
spi_flash_flush_keep_cache(true);
|
|
}
|
|
if (ram_cache == NULL && !allocate_ram_cache()) {
|
|
erase_sector(SCRATCH_SECTOR);
|
|
wait_for_flash_ready();
|
|
}
|
|
current_sector = this_sector;
|
|
dirty_mask = 0;
|
|
}
|
|
dirty_mask |= mask;
|
|
// Copy the block to the appropriate cache.
|
|
if (ram_cache != NULL) {
|
|
uint8_t pages_per_block = FLASH_BLOCK_SIZE / page_size;
|
|
for (int i = 0; i < pages_per_block; i++) {
|
|
memcpy(ram_cache[block_index * pages_per_block + i],
|
|
data + i * page_size,
|
|
page_size);
|
|
}
|
|
return true;
|
|
} else {
|
|
uint32_t scratch_address = SCRATCH_SECTOR + block_index * FLASH_BLOCK_SIZE;
|
|
return write_flash(scratch_address, data, FLASH_BLOCK_SIZE);
|
|
}
|
|
}
|
|
}
|
|
|
|
mp_uint_t spi_flash_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
if (!spi_flash_read_block(dest + i * FLASH_BLOCK_SIZE, block_num + i)) {
|
|
return 1; // error
|
|
}
|
|
}
|
|
return 0; // success
|
|
}
|
|
|
|
mp_uint_t spi_flash_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
|
|
for (size_t i = 0; i < num_blocks; i++) {
|
|
if (!spi_flash_write_block(src + i * FLASH_BLOCK_SIZE, block_num + i)) {
|
|
return 1; // error
|
|
}
|
|
}
|
|
return 0; // success
|
|
}
|
|
|
|
void mark_flash_cache_for_gc(void) {
|
|
if (current_sector != NO_SECTOR_LOADED && ram_cache != NULL) {
|
|
gc_mark_block(ram_cache);
|
|
uint8_t blocks_per_sector = sector_size / FLASH_BLOCK_SIZE;
|
|
uint8_t pages_per_block = FLASH_BLOCK_SIZE / page_size;
|
|
for (uint8_t i = 0; i < blocks_per_sector; i++) {
|
|
for (uint8_t j = 0; j < pages_per_block; j++) {
|
|
gc_mark_block(ram_cache[i * pages_per_block + j]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// MicroPython bindings
|
|
//
|
|
// Expose the flash as an object with the block protocol.
|
|
|
|
// there is a singleton Flash object
|
|
STATIC const mp_obj_base_t spi_flash_obj = {&spi_flash_type};
|
|
|
|
STATIC mp_obj_t spi_flash_obj_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)&spi_flash_obj;
|
|
}
|
|
|
|
STATIC mp_obj_t spi_flash_obj_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 = spi_flash_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(spi_flash_obj_readblocks_obj, spi_flash_obj_readblocks);
|
|
|
|
STATIC mp_obj_t spi_flash_obj_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 = spi_flash_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(spi_flash_obj_writeblocks_obj, spi_flash_obj_writeblocks);
|
|
|
|
STATIC mp_obj_t spi_flash_obj_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) {
|
|
case BP_IOCTL_INIT: spi_flash_init(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
case BP_IOCTL_DEINIT: spi_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0); // TODO properly
|
|
case BP_IOCTL_SYNC: spi_flash_flush(); return MP_OBJ_NEW_SMALL_INT(0);
|
|
case BP_IOCTL_SEC_COUNT: return MP_OBJ_NEW_SMALL_INT(spi_flash_get_block_count());
|
|
case BP_IOCTL_SEC_SIZE: return MP_OBJ_NEW_SMALL_INT(spi_flash_get_block_size());
|
|
default: return mp_const_none;
|
|
}
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_3(spi_flash_obj_ioctl_obj, spi_flash_obj_ioctl);
|
|
|
|
STATIC const mp_map_elem_t spi_flash_obj_locals_dict_table[] = {
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_readblocks), (mp_obj_t)&spi_flash_obj_readblocks_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_writeblocks), (mp_obj_t)&spi_flash_obj_writeblocks_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_ioctl), (mp_obj_t)&spi_flash_obj_ioctl_obj },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(spi_flash_obj_locals_dict, spi_flash_obj_locals_dict_table);
|
|
|
|
const mp_obj_type_t spi_flash_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_SPIFlash,
|
|
.make_new = spi_flash_obj_make_new,
|
|
.locals_dict = (mp_obj_t)&spi_flash_obj_locals_dict,
|
|
};
|
|
|
|
void flash_init_vfs(fs_user_mount_t *vfs) {
|
|
vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL | FSUSER_USB_WRITEABLE;
|
|
vfs->readblocks[0] = (mp_obj_t)&spi_flash_obj_readblocks_obj;
|
|
vfs->readblocks[1] = (mp_obj_t)&spi_flash_obj;
|
|
vfs->readblocks[2] = (mp_obj_t)spi_flash_read_blocks; // native version
|
|
vfs->writeblocks[0] = (mp_obj_t)&spi_flash_obj_writeblocks_obj;
|
|
vfs->writeblocks[1] = (mp_obj_t)&spi_flash_obj;
|
|
vfs->writeblocks[2] = (mp_obj_t)spi_flash_write_blocks; // native version
|
|
vfs->u.ioctl[0] = (mp_obj_t)&spi_flash_obj_ioctl_obj;
|
|
vfs->u.ioctl[1] = (mp_obj_t)&spi_flash_obj;
|
|
}
|