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stm32/sdcard: Move temporary DMA state from BSS to stack.

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This commit is contained in:
Damien George 2018-09-11 17:23:03 +10:00
parent e4f7001d9c
commit c26516d40f
1 changed files with 6 additions and 7 deletions
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13
ports/stm32/sdcard.c
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@ -129,9 +129,6 @@
// if an sd card is detected. This will save approx 260 bytes of RAM
// when no sdcard was being used.
static SD_HandleTypeDef sd_handle;
#if SDIO_USE_GPDMA
static DMA_HandleTypeDef sd_rx_dma, sd_tx_dma;
#endif
void sdcard_init(void) {
// invalidate the sd_handle
@ -334,8 +331,9 @@ mp_uint_t sdcard_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blo
uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
#if SDIO_USE_GPDMA
dma_init(&sd_rx_dma, &SDMMC_DMA, DMA_PERIPH_TO_MEMORY, &sd_handle);
sd_handle.hdmarx = &sd_rx_dma;
DMA_HandleTypeDef sd_dma;
dma_init(&sd_dma, &SDMMC_DMA, DMA_PERIPH_TO_MEMORY, &sd_handle);
sd_handle.hdmarx = &sd_dma;
#endif
// make sure cache is flushed and invalidated so when DMA updates the RAM
@ -400,8 +398,9 @@ mp_uint_t sdcard_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t n
uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
#if SDIO_USE_GPDMA
dma_init(&sd_tx_dma, &SDMMC_DMA, DMA_MEMORY_TO_PERIPH, &sd_handle);
sd_handle.hdmatx = &sd_tx_dma;
DMA_HandleTypeDef sd_dma;
dma_init(&sd_dma, &SDMMC_DMA, DMA_MEMORY_TO_PERIPH, &sd_handle);
sd_handle.hdmatx = &sd_dma;
#endif
// make sure cache is flushed to RAM so the DMA can read the correct data