kopia lustrzana https://github.com/micropython/micropython
133 wiersze
4.3 KiB
C
133 wiersze
4.3 KiB
C
/*
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* This file is part of the MicroPython 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) 2017-2018 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 "py/obj.h"
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#include "systick.h"
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#include "led.h"
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#include "storage.h"
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#if defined(MICROPY_HW_SPIFLASH_SIZE_BITS)
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#include "drivers/memory/spiflash.h"
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#include "genhdr/pins.h"
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static uint32_t flash_tick_counter_last_write;
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#if defined(MICROPY_HW_SPIFLASH_MOSI)
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// External SPI flash uses standard SPI interface
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STATIC const mp_machine_soft_spi_obj_t spiflash_spi_bus = {
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.base = {&mp_machine_soft_spi_type},
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.spi = {
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.delay_half = MICROPY_HW_SOFTSPI_MIN_DELAY,
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.polarity = 0,
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.phase = 0,
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.sck = &MICROPY_HW_SPIFLASH_SCK,
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.mosi = &MICROPY_HW_SPIFLASH_MOSI,
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.miso = &MICROPY_HW_SPIFLASH_MISO,
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}
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};
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STATIC const mp_spiflash_config_t spiflash_config = {
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.bus_kind = MP_SPIFLASH_BUS_SPI,
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.bus.u_spi.cs = &MICROPY_HW_SPIFLASH_CS,
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.bus.u_spi.data = (void*)&spiflash_spi_bus,
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.bus.u_spi.proto = &mp_machine_soft_spi_p,
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};
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#elif defined(MICROPY_HW_SPIFLASH_IO0)
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// External SPI flash uses quad SPI interface
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#include "drivers/bus/qspi.h"
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STATIC const mp_soft_qspi_obj_t soft_qspi_bus = {
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.cs = &MICROPY_HW_SPIFLASH_CS,
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.clk = &MICROPY_HW_SPIFLASH_SCK,
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.io0 = &MICROPY_HW_SPIFLASH_IO0,
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.io1 = &MICROPY_HW_SPIFLASH_IO1,
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.io2 = &MICROPY_HW_SPIFLASH_IO2,
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.io3 = &MICROPY_HW_SPIFLASH_IO3,
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};
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STATIC const mp_spiflash_config_t spiflash_config = {
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.bus_kind = MP_SPIFLASH_BUS_QSPI,
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.bus.u_qspi.data = (void*)&soft_qspi_bus,
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.bus.u_qspi.proto = &mp_soft_qspi_proto,
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};
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#endif
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STATIC mp_spiflash_t spiflash;
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void spi_bdev_init(void) {
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spiflash.config = &spiflash_config;
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mp_spiflash_init(&spiflash);
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flash_tick_counter_last_write = 0;
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}
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void spi_bdev_irq_handler(void) {
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if ((spiflash.flags & 1) && sys_tick_has_passed(flash_tick_counter_last_write, 1000)) {
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mp_spiflash_flush(&spiflash);
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led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off
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}
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}
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void spi_bdev_flush(void) {
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if (spiflash.flags & 1) {
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// we must disable USB irqs to prevent MSC contention with SPI flash
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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mp_spiflash_flush(&spiflash);
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led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off
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restore_irq_pri(basepri);
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}
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}
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int spi_bdev_readblocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
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// we must disable USB irqs to prevent MSC contention with SPI flash
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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mp_spiflash_read(&spiflash, block_num * FLASH_BLOCK_SIZE, num_blocks * FLASH_BLOCK_SIZE, dest);
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restore_irq_pri(basepri);
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return 0;
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}
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int spi_bdev_writeblocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
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// we must disable USB irqs to prevent MSC contention with SPI flash
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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int ret = mp_spiflash_write(&spiflash, block_num * FLASH_BLOCK_SIZE, num_blocks * FLASH_BLOCK_SIZE, src);
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if (spiflash.flags & 1) {
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led_state(PYB_LED_RED, 1); // indicate a dirty cache with LED on
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flash_tick_counter_last_write = HAL_GetTick();
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}
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restore_irq_pri(basepri);
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return ret;
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}
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#endif // defined(MICROPY_HW_SPIFLASH_SIZE_BITS)
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