diff options
Diffstat (limited to 'stmhal/usbd_hid_interface.c')
| -rw-r--r-- | stmhal/usbd_hid_interface.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/stmhal/usbd_hid_interface.c b/stmhal/usbd_hid_interface.c deleted file mode 100644 index 11b3a3acd..000000000 --- a/stmhal/usbd_hid_interface.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * This file is part of the MicroPython project, http://micropython.org/ - * - * Taken from ST Cube library and heavily modified. See below for original - * copyright header. - */ - -/** - ****************************************************************************** - * @file USB_Device/CDC_Standalone/Src/usbd_cdc_interface.c - * @author MCD Application Team - * @version V1.0.1 - * @date 26-February-2014 - * @brief Source file for USBD CDC interface - ****************************************************************************** - * @attention - * - * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> - * - * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); - * You may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.st.com/software_license_agreement_liberty_v2 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - ****************************************************************************** - */ - -/* Includes ------------------------------------------------------------------*/ - -#include <stdint.h> - -#include "usbd_cdc_msc_hid.h" -#include "usbd_hid_interface.h" - -#include "py/obj.h" -#include "irq.h" -#include "usb.h" - -/* Private variables ---------------------------------------------------------*/ - -static uint8_t buffer[2][HID_DATA_FS_MAX_PACKET_SIZE]; // pair of buffers to read individual packets into -static int8_t current_read_buffer = 0; // which buffer to read from -static uint32_t last_read_len = 0; // length of last read -static int8_t current_write_buffer = 0; // which buffer to write to - -/* Private function prototypes -----------------------------------------------*/ -static int8_t HID_Itf_Init (USBD_HandleTypeDef *pdev); -static int8_t HID_Itf_Receive (USBD_HandleTypeDef *pdev, uint8_t* pbuf, uint32_t Len); - -const USBD_HID_ItfTypeDef USBD_HID_fops = { - HID_Itf_Init, - HID_Itf_Receive -}; - -/** - * @brief HID_Itf_Init - * Initializes the HID media low layer - * @param None - * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL - */ -static int8_t HID_Itf_Init(USBD_HandleTypeDef *pdev) -{ - current_read_buffer = 0; - last_read_len = 0; - current_write_buffer = 0; - USBD_HID_SetRxBuffer(pdev, buffer[current_write_buffer]); - return USBD_OK; -} - -/** - * @brief HID_Itf_Receive - * Data received over USB OUT endpoint is processed here. - * @param Buf: Buffer of data received - * @param Len: Number of data received (in bytes) - * @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL - * @note The buffer we are passed here is just UserRxBuffer, so we are - * free to modify it. - */ -static int8_t HID_Itf_Receive(USBD_HandleTypeDef *pdev, uint8_t* Buf, uint32_t Len) { - current_write_buffer = !current_write_buffer; - last_read_len = Len; - // initiate next USB packet transfer, to append to existing data in buffer - USBD_HID_SetRxBuffer(pdev, buffer[current_write_buffer]); - USBD_HID_ReceivePacket(pdev); - // Set NAK to indicate we need to process read buffer - USBD_HID_SetNAK(pdev); - return USBD_OK; -} - -// Returns number of ready rx buffers. -int USBD_HID_RxNum(void) { - return (current_read_buffer != current_write_buffer); -} - -// timout in milliseconds. -// Returns number of bytes read from the device. -int USBD_HID_Rx(USBD_HandleTypeDef *pdev, uint8_t *buf, uint32_t len, uint32_t timeout) { - // Wait until we have buffer to read - uint32_t start = HAL_GetTick(); - while (current_read_buffer == current_write_buffer) { - // Wraparound of tick is taken care of by 2's complement arithmetic. - if (HAL_GetTick() - start >= timeout) { - // timeout - return 0; - } - if (query_irq() == IRQ_STATE_DISABLED) { - // IRQs disabled so buffer will never be filled; return immediately - return 0; - } - __WFI(); // enter sleep mode, waiting for interrupt - } - - // There is not enough space in buffer - if (len < last_read_len) { - return 0; - } - - // Copy bytes from device to user buffer - memcpy(buf, buffer[current_read_buffer], last_read_len); - current_read_buffer = !current_read_buffer; - - // Clear NAK to indicate we are ready to read more data - USBD_HID_ClearNAK(pdev); - - // Success, return number of bytes read - return last_read_len; -} |