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use dummy for all ZLP for ip3511, fix lpc55 build with DEBUG=1

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hathach
2022-10-24 18:43:21 +07:00
parent 35e1a27c95
commit e3b7ed9ae9
2 changed files with 9 additions and 2 deletions
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10
src/portable/nxp/lpc_ip3511/dcd_lpc_ip3511.c
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@@ -178,7 +178,9 @@ typedef struct
// For example: LPC55s69 port1 Highspeed must be USB_RAM (0x40100000)
// Use CFG_TUSB_MEM_SECTION to place it accordingly.
CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(256) static dcd_data_t _dcd;
CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(256) static volatile uint8_t dummy[8] = { 0 }; // a fix for EP0 OUT ZLPs overwriting the buffer
// Dummy buffer to fix ZLPs overwriting the buffer (probably an USB/DMA controller bug)
CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(64) static uint8_t dummy[8];
//--------------------------------------------------------------------+
// Multiple Controllers
@@ -405,10 +407,14 @@ bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t to
tu_memclr(&_dcd.dma[ep_id], sizeof(xfer_dma_t));
_dcd.dma[ep_id].total_bytes = total_bytes;
if (!buffer && !ep_id) // for EP0 OUT ZLPs to prevent overwrites to buffer
if (!buffer)
{
// Although having no data, ZLPs can cause buffer overwritten to zeroes.
// Probably due to USB/DMA controller side effect/bug.
// Assigned buffer offset to (valid) dummy to prevent overwriting to DATABUFSTART
buffer = (uint8_t*)(uint32_t)dummy;
}
prepare_ep_xfer(rhport, ep_id, get_buf_offset(buffer), total_bytes);
return true;