diff options
| author | Damien George <damien@micropython.org> | 2020-12-17 16:59:54 +1100 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2020-12-18 13:39:32 +1100 |
| commit | e43a74a4db484ac1bfef191a8aa19b58b519efc6 (patch) | |
| tree | bc8176ff47db092ff8dd88a1e80c3c5df08a94ab /ports/stm32/spibdev.c | |
| parent | 061cb1a73a4ecbf69a4e036053664b4f84754b34 (diff) | |
| download | micropython-e43a74a4db484ac1bfef191a8aa19b58b519efc6.tar.gz micropython-e43a74a4db484ac1bfef191a8aa19b58b519efc6.zip | |
drivers/memory/spiflash: Add MICROPY_HW_SPIFLASH_ENABLE_CACHE option.
This only needs to be enabled if a board uses FAT FS on external SPI flash.
When disabled (and using external SPI flash) 4k of RAM can be saved.
Signed-off-by: Damien George <damien@micropython.org>
Diffstat (limited to 'ports/stm32/spibdev.c')
| -rw-r--r-- | ports/stm32/spibdev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ports/stm32/spibdev.c b/ports/stm32/spibdev.c index 05c8819a77..5090b43b1c 100644 --- a/ports/stm32/spibdev.c +++ b/ports/stm32/spibdev.c @@ -41,19 +41,23 @@ int32_t spi_bdev_ioctl(spi_bdev_t *bdev, uint32_t op, uint32_t arg) { return 0; case BDEV_IOCTL_IRQ_HANDLER: + #if MICROPY_HW_SPIFLASH_ENABLE_CACHE if ((bdev->spiflash.flags & 1) && HAL_GetTick() - bdev->flash_tick_counter_last_write >= 1000) { mp_spiflash_cache_flush(&bdev->spiflash); led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off } + #endif return 0; case BDEV_IOCTL_SYNC: + #if MICROPY_HW_SPIFLASH_ENABLE_CACHE if (bdev->spiflash.flags & 1) { uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access mp_spiflash_cache_flush(&bdev->spiflash); led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off restore_irq_pri(basepri); } + #endif return 0; case BDEV_IOCTL_BLOCK_ERASE: { @@ -66,6 +70,7 @@ int32_t spi_bdev_ioctl(spi_bdev_t *bdev, uint32_t op, uint32_t arg) { return -MP_EINVAL; } +#if MICROPY_HW_SPIFLASH_ENABLE_CACHE int spi_bdev_readblocks(spi_bdev_t *bdev, uint8_t *dest, uint32_t block_num, uint32_t num_blocks) { uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access mp_spiflash_cached_read(&bdev->spiflash, block_num * FLASH_BLOCK_SIZE, num_blocks * FLASH_BLOCK_SIZE, dest); @@ -85,6 +90,7 @@ int spi_bdev_writeblocks(spi_bdev_t *bdev, const uint8_t *src, uint32_t block_nu return ret; } +#endif // MICROPY_HW_SPIFLASH_ENABLE_CACHE int spi_bdev_readblocks_raw(spi_bdev_t *bdev, uint8_t *dest, uint32_t block_num, uint32_t block_offset, uint32_t num_bytes) { uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access |