diff options
Diffstat (limited to 'stmhal/sdcard.c')
| -rw-r--r-- | stmhal/sdcard.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/stmhal/sdcard.c b/stmhal/sdcard.c index a2aa4c84d..f7cf15343 100644 --- a/stmhal/sdcard.c +++ b/stmhal/sdcard.c @@ -30,6 +30,7 @@ #include "py/runtime.h" #include "lib/fatfs/ff.h" #include "extmod/fsusermount.h" +#include "mphalport.h" #include "sdcard.h" #include "pin.h" @@ -221,6 +222,10 @@ mp_uint_t sdcard_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blo dma_init(&sd_rx_dma, &dma_SDIO_0_RX, &sd_handle); sd_handle.hdmarx = &sd_rx_dma; + // make sure cache is flushed and invalidated so when DMA updates the RAM + // from reading the peripheral the CPU then reads the new data + MP_HAL_CLEANINVALIDATE_DCACHE(dest, num_blocks * SDCARD_BLOCK_SIZE); + err = HAL_SD_ReadBlocks_BlockNumber_DMA(&sd_handle, (uint32_t*)dest, block_num, SDCARD_BLOCK_SIZE, num_blocks); if (err == SD_OK) { // wait for DMA transfer to finish, with a large timeout @@ -277,6 +282,9 @@ mp_uint_t sdcard_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t n dma_init(&sd_tx_dma, &dma_SDIO_0_TX, &sd_handle); sd_handle.hdmatx = &sd_tx_dma; + // make sure cache is flushed to RAM so the DMA can read the correct data + MP_HAL_CLEAN_DCACHE(src, num_blocks * SDCARD_BLOCK_SIZE); + err = HAL_SD_WriteBlocks_BlockNumber_DMA(&sd_handle, (uint32_t*)src, block_num, SDCARD_BLOCK_SIZE, num_blocks); if (err == SD_OK) { // wait for DMA transfer to finish, with a large timeout |