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hal: renesas: ra: Fix zero length packets not being sent for pipe0 #165

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hal: renesas: ra: Fix zero length packets not being sent for pipe0 #165

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9 changes: 8 additions & 1 deletion drivers/ra/fsp/src/r_usb_device/r_usb_device.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1133,9 +1133,11 @@ static inline fsp_err_t process_pipe0_xfer (usbd_instance_ctrl_t * const p_ctrl,
bool hs_module = USB_IS_USBHS(p_ctrl->p_cfg->module_number);
volatile uint16_t * cfifosel = hs_module ? &R_USB_HS0->CFIFOSEL : &R_USB_FS0->CFIFOSEL;
volatile uint16_t * dcpctr = hs_module ? &R_USB_HS0->DCPCTR : &R_USB_FS0->DCPCTR;
volatile uint16_t * cfifoctr = hs_module ? &R_USB_HS0->CFIFOCTR : &R_USB_FS0->CFIFOCTR;
#else
volatile uint16_t * cfifosel = &R_USB_FS0->CFIFOSEL;
volatile uint16_t * dcpctr = &R_USB_FS0->DCPCTR;
volatile uint16_t * cfifoctr = &R_USB_FS0->CFIFOCTR;
#endif

const uint8_t dir = USB_GET_EP_DIR(ep_addr);
Expand Down Expand Up @@ -1174,7 +1176,12 @@ static inline fsp_err_t process_pipe0_xfer (usbd_instance_ctrl_t * const p_ctrl,
{
/* ZLP */
pipe->buf = NULL;
*dcpctr = R_USB_DCPCTR_CCPL_Msk | R_USB_PIPE_CTR_PID_BUF;
if (USB_EP_CONTROL_IN == ep_addr)
{
*cfifoctr = R_USB_CFIFOCTR_BVAL_Msk;
}

*dcpctr = R_USB_DCPCTR_CCPL_Msk | R_USB_PIPE_CTR_PID_BUF;
}

return FSP_SUCCESS;
Expand Down