- some explanatory comments added

2024-04-20 10:54:27 +02:00 · 2024-04-20 10:54:27 +02:00 · 3e67079427
commit 3e67079427
parent db4e59cfd9
1 changed files with 1 additions and 1 deletions
--- a/usb_driver.c
+++ b/usb_driver.c
@ -345,7 +345,7 @@ void usbdrv_configure_endpoint(uint8_t ep, uint8_t dir, const USBDRV_EpConfig *c
        // program FIFO corresponding FIFO number
        WRITE_FIELD(USBINEP[ep].DIEPCTL, USB_OTG_DIEPCTL_TXFNUM, ep);

-        // store Tx FIFO size
+        // store Tx FIFO size (both fields are WORD units, NOT bytes, this RM is missing this information!)
        uint32_t tx_fifo_config = ((cfg->fifo_size >> 2) << USB_OTG_DIEPTXF_INEPTXFD_Pos) | (cfg->fifo_address >> 2); // combine size in DWORDs and address
        *(USB_pDIEPTXF[ep]) = tx_fifo_config;                                                                         // save