diff options
| author | Pavol Rusnak | 2017-01-17 20:17:15 +0100 |
|---|---|---|
| committer | Damien George | 2017-01-19 12:35:09 +1100 |
| commit | 0883a7e72f7122b307798205441c96120446bf75 (patch) | |
| tree | c7c2f164ed8ee1f013cadccf21f4eb44968d9cd3 /stmhal/usbdev | |
| parent | 6ace84b08962baff5baae09443e9d4f968d11e84 (diff) | |
stmhal: Implement SNAK/CNAK mechanism for USB HID receive.
This implements flow control in case user does not call recv method often
enough (it tells host side to stop sending more data).
Diffstat (limited to 'stmhal/usbdev')
| -rw-r--r-- | stmhal/usbdev/class/inc/usbd_cdc_msc_hid.h | 2 | ||||
| -rw-r--r-- | stmhal/usbdev/class/src/usbd_cdc_msc_hid.c | 18 |
2 files changed, 20 insertions, 0 deletions
diff --git a/stmhal/usbdev/class/inc/usbd_cdc_msc_hid.h b/stmhal/usbdev/class/inc/usbd_cdc_msc_hid.h index 7cb64fd84..5f0502766 100644 --- a/stmhal/usbdev/class/inc/usbd_cdc_msc_hid.h +++ b/stmhal/usbdev/class/inc/usbd_cdc_msc_hid.h @@ -116,5 +116,7 @@ uint8_t USBD_HID_SetRxBuffer(USBD_HandleTypeDef *pdev, uint8_t *pbuff); uint8_t USBD_HID_ReceivePacket(USBD_HandleTypeDef *pdev); int USBD_HID_CanSendReport(USBD_HandleTypeDef *pdev); uint8_t USBD_HID_SendReport(USBD_HandleTypeDef *pdev, uint8_t *report, uint16_t len); +uint8_t USBD_HID_SetNAK(USBD_HandleTypeDef *pdev); +uint8_t USBD_HID_ClearNAK(USBD_HandleTypeDef *pdev); #endif // _USB_CDC_MSC_CORE_H_ diff --git a/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c b/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c index 3ebc7d828..cfae7224d 100644 --- a/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c +++ b/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c @@ -1093,6 +1093,24 @@ uint8_t USBD_HID_SendReport(USBD_HandleTypeDef *pdev, uint8_t *report, uint16_t return USBD_OK; } +uint8_t USBD_HID_SetNAK(USBD_HandleTypeDef *pdev) { + // get USBx object from pdev (needed for USBx_OUTEP macro below) + PCD_HandleTypeDef *hpcd = pdev->pData; + USB_OTG_GlobalTypeDef *USBx = hpcd->Instance; + // set NAK on HID OUT endpoint + USBx_OUTEP(HID_OUT_EP_WITH_CDC)->DOEPCTL |= USB_OTG_DOEPCTL_SNAK; + return USBD_OK; +} + +uint8_t USBD_HID_ClearNAK(USBD_HandleTypeDef *pdev) { + // get USBx object from pdev (needed for USBx_OUTEP macro below) + PCD_HandleTypeDef *hpcd = pdev->pData; + USB_OTG_GlobalTypeDef *USBx = hpcd->Instance; + // clear NAK on HID OUT endpoint + USBx_OUTEP(HID_OUT_EP_WITH_CDC)->DOEPCTL |= USB_OTG_DOEPCTL_CNAK; + return USBD_OK; +} + // CDC/MSC/HID interface class callback structure USBD_ClassTypeDef USBD_CDC_MSC_HID = { USBD_CDC_MSC_HID_Init, |