diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/nuvoton/nuc505/dcd_nuc505.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/src/portable/nuvoton/nuc505/dcd_nuc505.c b/src/portable/nuvoton/nuc505/dcd_nuc505.c index e05e73eff..8457e686b 100644 --- a/src/portable/nuvoton/nuc505/dcd_nuc505.c +++ b/src/portable/nuvoton/nuc505/dcd_nuc505.c @@ -33,12 +33,6 @@ nomenclature of EPA through EPL. */ -/* - Note on OPT_MCU_NUC505_USB_DMA: the author suggests against using this option. - The DMA functionality of the USBD peripheral does not appear to succeed with - transfer lengths that are longer (> 64 bytes) and are not a multiple of 4. -*/ - #include "tusb_option.h" #if TUSB_OPT_DEVICE_ENABLED && (CFG_TUSB_MCU == OPT_MCU_NUC505) @@ -46,6 +40,13 @@ #include "device/dcd.h" #include "NUC505Series.h" +/* + * The DMA functionality of the USBD peripheral does not appear to succeed with + * transfer lengths that are longer (> 64 bytes) and are not a multiple of 4. + * Keep disabled for now. + */ +#define USE_DMA 0 + /* rather important info unfortunately not provided by device include files */ #define USBD_BUF_SIZE 2048 /* how much USB buffer space there is */ #define USBD_MAX_DMA_LEN 0x1000 /* max bytes that can be DMAed at one time */ @@ -217,7 +218,7 @@ static void bus_reset(void) current_dma_xfer = NULL; } -#ifdef OPT_MCU_NUC505_USB_DMA +#if USE_DMA /* this must only be called by the ISR; it does its best to share the single DMA engine across all user EPs (IN and OUT) */ static void service_dma(void) { @@ -473,7 +474,7 @@ void USBD_IRQHandler(void) if (bus_state & USBD_BUSINTSTS_DMADONEIF_Msk) { -#ifdef OPT_MCU_NUC505_USB_DMA +#if USE_DMA if (current_dma_xfer) { current_dma_xfer->dma_requested = false; @@ -607,7 +608,7 @@ void USBD_IRQHandler(void) if (out_ep) { -#ifdef OPT_MCU_NUC505_USB_DMA +#if USE_DMA xfer->dma_requested = true; service_dma(); #else |