2014-05-03 23:27:38 +01:00
|
|
|
/*
|
|
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
|
|
*
|
|
|
|
* Taken from ST Cube library and heavily modified. See below for original
|
|
|
|
* copyright header.
|
|
|
|
*/
|
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
/**
|
|
|
|
******************************************************************************
|
|
|
|
* @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 ------------------------------------------------------------------*/
|
2014-07-31 10:30:42 +01:00
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
#include <stdbool.h>
|
2014-07-31 10:30:42 +01:00
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
#include "stm32f4xx_hal.h"
|
2014-03-30 00:00:15 +00:00
|
|
|
#include "usbd_cdc_msc_hid.h"
|
2014-03-15 16:54:23 +00:00
|
|
|
#include "usbd_cdc_interface.h"
|
|
|
|
#include "pendsv.h"
|
2014-07-31 10:30:42 +01:00
|
|
|
|
2014-03-22 12:46:23 +00:00
|
|
|
// CDC control commands
|
|
|
|
#define CDC_SEND_ENCAPSULATED_COMMAND 0x00
|
|
|
|
#define CDC_GET_ENCAPSULATED_RESPONSE 0x01
|
|
|
|
#define CDC_SET_COMM_FEATURE 0x02
|
|
|
|
#define CDC_GET_COMM_FEATURE 0x03
|
|
|
|
#define CDC_CLEAR_COMM_FEATURE 0x04
|
|
|
|
#define CDC_SET_LINE_CODING 0x20
|
|
|
|
#define CDC_GET_LINE_CODING 0x21
|
|
|
|
#define CDC_SET_CONTROL_LINE_STATE 0x22
|
|
|
|
#define CDC_SEND_BREAK 0x23
|
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
|
|
/* Private define ------------------------------------------------------------*/
|
2014-03-23 18:54:48 +00:00
|
|
|
#define APP_RX_DATA_SIZE 1024 // I think this must be at least CDC_DATA_FS_OUT_PACKET_SIZE=64 (APP_RX_DATA_SIZE was 2048)
|
2014-03-15 16:54:23 +00:00
|
|
|
#define APP_TX_DATA_SIZE 1024 // I think this can be any value (was 2048)
|
|
|
|
|
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
|
|
/* Private variables ---------------------------------------------------------*/
|
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
static __IO uint8_t dev_is_connected = 0; // indicates if we are connected
|
2014-03-22 13:21:58 +00:00
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
static uint8_t UserRxBuffer[APP_RX_DATA_SIZE]; // received data from USB OUT endpoint is stored in this buffer
|
|
|
|
static uint16_t UserRxBufCur = 0; // points to next available character in UserRxBuffer
|
|
|
|
static uint16_t UserRxBufLen = 0; // counts number of valid characters in UserRxBuffer
|
|
|
|
|
|
|
|
static uint8_t UserTxBuffer[APP_TX_DATA_SIZE]; // data for USB IN endpoind is stored in this buffer
|
|
|
|
static uint16_t UserTxBufPtrIn = 0; // increment this pointer modulo APP_TX_DATA_SIZE when new data is available
|
2014-04-14 01:46:25 +01:00
|
|
|
static __IO uint16_t UserTxBufPtrOut = 0; // increment this pointer modulo APP_TX_DATA_SIZE when data is drained
|
2014-04-16 15:51:27 +01:00
|
|
|
static uint16_t UserTxBufPtrOutShadow = 0; // shadow of above
|
|
|
|
static uint8_t UserTxBufPtrWaitCount = 0; // used to implement a timeout waiting for low-level USB driver
|
2014-04-17 00:12:07 +01:00
|
|
|
static uint8_t UserTxNeedEmptyPacket = 0; // used to flush the USB IN endpoint if the last packet was exactly the endpoint packet size
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-11-27 16:58:31 +00:00
|
|
|
static int user_interrupt_char = -1;
|
2014-03-15 16:54:23 +00:00
|
|
|
static void *user_interrupt_data = NULL;
|
|
|
|
|
|
|
|
/* USB handler declaration */
|
|
|
|
extern USBD_HandleTypeDef hUSBDDevice;
|
|
|
|
|
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
|
|
static int8_t CDC_Itf_Init (void);
|
|
|
|
static int8_t CDC_Itf_DeInit (void);
|
|
|
|
static int8_t CDC_Itf_Control (uint8_t cmd, uint8_t* pbuf, uint16_t length);
|
|
|
|
static int8_t CDC_Itf_Receive (uint8_t* pbuf, uint32_t *Len);
|
|
|
|
|
|
|
|
const USBD_CDC_ItfTypeDef USBD_CDC_fops = {
|
|
|
|
CDC_Itf_Init,
|
|
|
|
CDC_Itf_DeInit,
|
|
|
|
CDC_Itf_Control,
|
|
|
|
CDC_Itf_Receive
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Private functions ---------------------------------------------------------*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief CDC_Itf_Init
|
|
|
|
* Initializes the CDC media low layer
|
|
|
|
* @param None
|
|
|
|
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
|
|
|
|
*/
|
|
|
|
static int8_t CDC_Itf_Init(void)
|
|
|
|
{
|
|
|
|
#if 0
|
|
|
|
/*##-1- Configure the UART peripheral ######################################*/
|
|
|
|
/* Put the USART peripheral in the Asynchronous mode (UART Mode) */
|
|
|
|
/* USART configured as follow:
|
|
|
|
- Word Length = 8 Bits
|
|
|
|
- Stop Bit = One Stop bit
|
|
|
|
- Parity = No parity
|
|
|
|
- BaudRate = 115200 baud
|
|
|
|
- Hardware flow control disabled (RTS and CTS signals) */
|
|
|
|
UartHandle.Instance = USARTx;
|
|
|
|
UartHandle.Init.BaudRate = 115200;
|
|
|
|
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
|
|
|
|
UartHandle.Init.StopBits = UART_STOPBITS_1;
|
|
|
|
UartHandle.Init.Parity = UART_PARITY_NONE;
|
|
|
|
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
|
|
|
|
UartHandle.Init.Mode = UART_MODE_TX_RX;
|
|
|
|
|
|
|
|
if(HAL_UART_Init(&UartHandle) != HAL_OK)
|
|
|
|
{
|
|
|
|
/* Initialization Error */
|
|
|
|
Error_Handler();
|
|
|
|
}
|
|
|
|
|
|
|
|
/*##-2- Put UART peripheral in IT reception process ########################*/
|
|
|
|
/* Any data received will be stored in "UserTxBuffer" buffer */
|
|
|
|
if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)UserTxBuffer, 1) != HAL_OK)
|
|
|
|
{
|
|
|
|
/* Transfer error in reception process */
|
|
|
|
Error_Handler();
|
|
|
|
}
|
|
|
|
|
|
|
|
/*##-3- Configure the TIM Base generation #################################*/
|
2014-03-22 23:54:13 +00:00
|
|
|
now done in HAL_MspInit
|
2014-03-15 16:54:23 +00:00
|
|
|
TIM_Config();
|
2014-03-22 23:54:13 +00:00
|
|
|
#endif
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-03-22 23:54:13 +00:00
|
|
|
/*##-4- Start the TIM Base generation in interrupt mode ####################*/
|
|
|
|
/* Start Channel1 */
|
|
|
|
__HAL_TIM_ENABLE_IT(&TIM3_Handle, TIM_IT_UPDATE);
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-03-22 23:54:13 +00:00
|
|
|
/*##-5- Set Application Buffers ############################################*/
|
|
|
|
USBD_CDC_SetTxBuffer(&hUSBDDevice, UserTxBuffer, 0);
|
|
|
|
USBD_CDC_SetRxBuffer(&hUSBDDevice, UserRxBuffer);
|
2014-03-15 16:54:23 +00:00
|
|
|
|
|
|
|
UserRxBufCur = 0;
|
|
|
|
UserRxBufLen = 0;
|
|
|
|
|
2014-03-23 18:54:48 +00:00
|
|
|
/* NOTE: we cannot reset these here, because USBD_CDC_SetInterrupt
|
|
|
|
* may be called before this init function to set these values.
|
|
|
|
* This can happen if the USB enumeration occurs after the call to
|
|
|
|
* USBD_CDC_SetInterrupt.
|
2014-11-27 16:58:31 +00:00
|
|
|
user_interrupt_char = -1;
|
2014-03-15 16:54:23 +00:00
|
|
|
user_interrupt_data = NULL;
|
2014-03-23 18:54:48 +00:00
|
|
|
*/
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-03-22 23:54:13 +00:00
|
|
|
return (USBD_OK);
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief CDC_Itf_DeInit
|
|
|
|
* DeInitializes the CDC media low layer
|
|
|
|
* @param None
|
|
|
|
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
|
|
|
|
*/
|
|
|
|
static int8_t CDC_Itf_DeInit(void)
|
|
|
|
{
|
|
|
|
#if 0
|
|
|
|
/* DeInitialize the UART peripheral */
|
|
|
|
if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
|
|
|
|
{
|
|
|
|
/* Initialization Error */
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return (USBD_OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief CDC_Itf_Control
|
|
|
|
* Manage the CDC class requests
|
|
|
|
* @param Cmd: Command code
|
|
|
|
* @param Buf: Buffer containing command data (request parameters)
|
|
|
|
* @param Len: Number of data to be sent (in bytes)
|
|
|
|
* @retval Result of the opeartion: USBD_OK if all operations are OK else USBD_FAIL
|
|
|
|
*/
|
2014-03-22 13:21:58 +00:00
|
|
|
static int8_t CDC_Itf_Control(uint8_t cmd, uint8_t* pbuf, uint16_t length) {
|
|
|
|
switch (cmd) {
|
|
|
|
case CDC_SEND_ENCAPSULATED_COMMAND:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_GET_ENCAPSULATED_RESPONSE:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_SET_COMM_FEATURE:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_GET_COMM_FEATURE:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_CLEAR_COMM_FEATURE:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_SET_LINE_CODING:
|
|
|
|
#if 0
|
|
|
|
LineCoding.bitrate = (uint32_t)(pbuf[0] | (pbuf[1] << 8) |\
|
|
|
|
(pbuf[2] << 16) | (pbuf[3] << 24));
|
|
|
|
LineCoding.format = pbuf[4];
|
|
|
|
LineCoding.paritytype = pbuf[5];
|
|
|
|
LineCoding.datatype = pbuf[6];
|
|
|
|
/* Set the new configuration */
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_GET_LINE_CODING:
|
|
|
|
#if 0
|
|
|
|
pbuf[0] = (uint8_t)(LineCoding.bitrate);
|
|
|
|
pbuf[1] = (uint8_t)(LineCoding.bitrate >> 8);
|
|
|
|
pbuf[2] = (uint8_t)(LineCoding.bitrate >> 16);
|
|
|
|
pbuf[3] = (uint8_t)(LineCoding.bitrate >> 24);
|
|
|
|
pbuf[4] = LineCoding.format;
|
|
|
|
pbuf[5] = LineCoding.paritytype;
|
|
|
|
pbuf[6] = LineCoding.datatype;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Add your code here */
|
|
|
|
pbuf[0] = (uint8_t)(115200);
|
|
|
|
pbuf[1] = (uint8_t)(115200 >> 8);
|
|
|
|
pbuf[2] = (uint8_t)(115200 >> 16);
|
|
|
|
pbuf[3] = (uint8_t)(115200 >> 24);
|
|
|
|
pbuf[4] = 0; // stop bits (1)
|
|
|
|
pbuf[5] = 0; // parity (none)
|
|
|
|
pbuf[6] = 8; // number of bits (8)
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_SET_CONTROL_LINE_STATE:
|
|
|
|
dev_is_connected = length & 1; // wValue is passed in Len (bit of a hack)
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CDC_SEND_BREAK:
|
|
|
|
/* Add your code here */
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return USBD_OK;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief TIM period elapsed callback
|
|
|
|
* @param htim: TIM handle
|
|
|
|
* @retval None
|
|
|
|
*/
|
2014-03-22 18:34:16 +00:00
|
|
|
void USBD_CDC_HAL_TIM_PeriodElapsedCallback(void) {
|
2014-04-16 15:51:27 +01:00
|
|
|
if (!dev_is_connected) {
|
|
|
|
// CDC device is not connected to a host, so we are unable to send any data
|
|
|
|
return;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
2014-04-16 15:51:27 +01:00
|
|
|
|
2014-04-17 00:12:07 +01:00
|
|
|
if (UserTxBufPtrOut == UserTxBufPtrIn && !UserTxNeedEmptyPacket) {
|
2014-04-16 15:51:27 +01:00
|
|
|
// No outstanding data to send
|
|
|
|
return;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
2014-04-16 15:51:27 +01:00
|
|
|
|
|
|
|
if (UserTxBufPtrOut != UserTxBufPtrOutShadow) {
|
|
|
|
// We have sent data and are waiting for the low-level USB driver to
|
|
|
|
// finish sending it over the USB in-endpoint.
|
2014-04-16 23:17:29 +01:00
|
|
|
// We have a 15 * 10ms = 150ms timeout
|
|
|
|
if (UserTxBufPtrWaitCount < 15) {
|
2014-04-16 15:51:27 +01:00
|
|
|
PCD_HandleTypeDef *hpcd = hUSBDDevice.pData;
|
|
|
|
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
|
2014-04-16 23:17:29 +01:00
|
|
|
if (USBx_INEP(CDC_IN_EP & 0x7f)->DIEPTSIZ & USB_OTG_DIEPTSIZ_XFRSIZ) {
|
2014-04-16 15:51:27 +01:00
|
|
|
// USB in-endpoint is still reading the data
|
|
|
|
UserTxBufPtrWaitCount++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
UserTxBufPtrOut = UserTxBufPtrOutShadow;
|
2014-04-14 01:46:25 +01:00
|
|
|
}
|
2014-04-16 15:51:27 +01:00
|
|
|
|
2014-04-17 00:12:07 +01:00
|
|
|
if (UserTxBufPtrOutShadow != UserTxBufPtrIn || UserTxNeedEmptyPacket) {
|
2014-04-16 15:51:27 +01:00
|
|
|
uint32_t buffptr;
|
|
|
|
uint32_t buffsize;
|
|
|
|
|
|
|
|
if (UserTxBufPtrOutShadow > UserTxBufPtrIn) { // rollback
|
|
|
|
buffsize = APP_TX_DATA_SIZE - UserTxBufPtrOutShadow;
|
|
|
|
} else {
|
|
|
|
buffsize = UserTxBufPtrIn - UserTxBufPtrOutShadow;
|
|
|
|
}
|
|
|
|
|
|
|
|
buffptr = UserTxBufPtrOutShadow;
|
|
|
|
|
|
|
|
USBD_CDC_SetTxBuffer(&hUSBDDevice, (uint8_t*)&UserTxBuffer[buffptr], buffsize);
|
|
|
|
|
|
|
|
if (USBD_CDC_TransmitPacket(&hUSBDDevice) == USBD_OK) {
|
|
|
|
UserTxBufPtrOutShadow += buffsize;
|
|
|
|
if (UserTxBufPtrOutShadow == APP_TX_DATA_SIZE) {
|
|
|
|
UserTxBufPtrOutShadow = 0;
|
|
|
|
}
|
|
|
|
UserTxBufPtrWaitCount = 0;
|
2014-04-17 00:12:07 +01:00
|
|
|
|
|
|
|
// According to the USB specification, a packet size of 64 bytes (CDC_DATA_FS_MAX_PACKET_SIZE)
|
|
|
|
// gets held at the USB host until the next packet is sent. This is because a
|
|
|
|
// packet of maximum size is considered to be part of a longer chunk of data, and
|
|
|
|
// the host waits for all data to arrive (ie, waits for a packet < max packet size).
|
|
|
|
// To flush a packet of exactly max packet size, we need to send a zero-size packet.
|
|
|
|
// See eg http://www.cypress.com/?id=4&rID=92719
|
2014-05-10 18:56:16 +01:00
|
|
|
UserTxNeedEmptyPacket = (buffsize > 0 && buffsize % CDC_DATA_FS_MAX_PACKET_SIZE == 0 && UserTxBufPtrOutShadow == UserTxBufPtrIn);
|
2014-04-16 15:51:27 +01:00
|
|
|
}
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief CDC_Itf_DataRx
|
|
|
|
* 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 CDC_Itf_Receive(uint8_t* Buf, uint32_t *Len) {
|
|
|
|
#if 0
|
|
|
|
// this sends the data over the UART using DMA
|
|
|
|
HAL_UART_Transmit_DMA(&UartHandle, Buf, *Len);
|
|
|
|
#endif
|
|
|
|
|
2014-03-23 18:54:48 +00:00
|
|
|
// TODO improve this function to implement a circular buffer
|
|
|
|
|
|
|
|
// if we have processed all the characters, reset the buffer counters
|
|
|
|
if (UserRxBufCur > 0 && UserRxBufCur >= UserRxBufLen) {
|
|
|
|
memmove(UserRxBuffer, UserRxBuffer + UserRxBufLen, *Len);
|
|
|
|
UserRxBufCur = 0;
|
|
|
|
UserRxBufLen = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
uint32_t delta_len;
|
|
|
|
|
2014-11-27 16:58:31 +00:00
|
|
|
if (user_interrupt_char == -1) {
|
2014-03-15 16:54:23 +00:00
|
|
|
// no special interrupt character
|
2014-03-23 18:54:48 +00:00
|
|
|
delta_len = *Len;
|
2014-03-15 16:54:23 +00:00
|
|
|
|
|
|
|
} else {
|
|
|
|
// filter out sepcial interrupt character from the buffer
|
|
|
|
bool char_found = false;
|
|
|
|
uint8_t *dest = Buf;
|
|
|
|
uint8_t *src = Buf;
|
|
|
|
uint8_t *buf_top = Buf + *Len;
|
|
|
|
for (; src < buf_top; src++) {
|
|
|
|
if (*src == user_interrupt_char) {
|
|
|
|
char_found = true;
|
2014-10-26 15:39:22 +00:00
|
|
|
// raise exception when interrupts are finished
|
|
|
|
pendsv_nlr_jump(user_interrupt_data);
|
2014-03-15 16:54:23 +00:00
|
|
|
} else {
|
|
|
|
if (char_found) {
|
|
|
|
*dest = *src;
|
|
|
|
}
|
|
|
|
dest++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-23 18:54:48 +00:00
|
|
|
// length of remaining characters
|
|
|
|
delta_len = dest - Buf;
|
|
|
|
}
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-03-23 18:54:48 +00:00
|
|
|
if (UserRxBufLen + delta_len + CDC_DATA_FS_MAX_PACKET_SIZE > APP_RX_DATA_SIZE) {
|
|
|
|
// if we keep this data then the buffer can overflow on the next USB rx
|
|
|
|
// so we don't increment the length, and throw this data away
|
|
|
|
} else {
|
|
|
|
// data fits, leaving room for another CDC_DATA_FS_OUT_PACKET_SIZE
|
|
|
|
UserRxBufLen += delta_len;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
|
|
|
|
2014-03-23 18:54:48 +00:00
|
|
|
// initiate next USB packet transfer, to append to existing data in buffer
|
|
|
|
USBD_CDC_SetRxBuffer(&hUSBDDevice, UserRxBuffer + UserRxBufLen);
|
|
|
|
USBD_CDC_ReceivePacket(&hUSBDDevice);
|
|
|
|
|
|
|
|
return USBD_OK;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
|
|
|
|
2014-03-22 13:21:58 +00:00
|
|
|
int USBD_CDC_IsConnected(void) {
|
|
|
|
return dev_is_connected;
|
|
|
|
}
|
|
|
|
|
2014-03-15 16:54:23 +00:00
|
|
|
void USBD_CDC_SetInterrupt(int chr, void *data) {
|
|
|
|
user_interrupt_char = chr;
|
|
|
|
user_interrupt_data = data;
|
|
|
|
}
|
|
|
|
|
2014-10-31 00:12:02 +00:00
|
|
|
int USBD_CDC_TxHalfEmpty(void) {
|
|
|
|
int32_t tx_waiting = (int32_t)UserTxBufPtrIn - (int32_t)UserTxBufPtrOut;
|
|
|
|
if (tx_waiting < 0) {
|
|
|
|
tx_waiting += APP_TX_DATA_SIZE;
|
|
|
|
}
|
|
|
|
return tx_waiting <= APP_TX_DATA_SIZE / 2;
|
|
|
|
}
|
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
// timout in milliseconds.
|
|
|
|
// Returns number of bytes written to the device.
|
|
|
|
int USBD_CDC_Tx(const uint8_t *buf, uint32_t len, uint32_t timeout) {
|
|
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
|
|
// Wait until the device is connected and the buffer has space, with a given timeout
|
|
|
|
uint32_t start = HAL_GetTick();
|
|
|
|
while (!dev_is_connected || ((UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1)) == UserTxBufPtrOut) {
|
|
|
|
// Wraparound of tick is taken care of by 2's complement arithmetic.
|
|
|
|
if (HAL_GetTick() - start >= timeout) {
|
|
|
|
// timeout
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
__WFI(); // enter sleep mode, waiting for interrupt
|
|
|
|
}
|
|
|
|
|
|
|
|
// Write data to device buffer
|
|
|
|
UserTxBuffer[UserTxBufPtrIn] = buf[i];
|
|
|
|
UserTxBufPtrIn = (UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Success, return number of bytes read
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Always write all of the data to the device tx buffer, even if the
|
|
|
|
// device is not connected, or if the buffer is full. Has a small timeout
|
|
|
|
// to wait for the buffer to be drained, in the case the device is connected.
|
|
|
|
void USBD_CDC_TxAlways(const uint8_t *buf, uint32_t len) {
|
2014-03-15 16:54:23 +00:00
|
|
|
for (int i = 0; i < len; i++) {
|
2014-04-16 15:51:27 +01:00
|
|
|
// If the CDC device is not connected to the host then we don't have anyone to receive our data.
|
|
|
|
// The device may become connected in the future, so we should at least try to fill the buffer
|
|
|
|
// and hope that it doesn't overflow by the time the device connects.
|
|
|
|
// If the device is not connected then we should go ahead and fill the buffer straight away,
|
|
|
|
// ignoring overflow. Otherwise, we should make sure that we have enough room in the buffer.
|
|
|
|
if (dev_is_connected) {
|
|
|
|
// If the buffer is full, wait until it gets drained, with a timeout of 500ms
|
|
|
|
// (wraparound of tick is taken care of by 2's complement arithmetic).
|
|
|
|
uint32_t start = HAL_GetTick();
|
|
|
|
while (((UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1)) == UserTxBufPtrOut && HAL_GetTick() - start <= 500) {
|
|
|
|
__WFI(); // enter sleep mode, waiting for interrupt
|
|
|
|
}
|
|
|
|
|
|
|
|
// Some unused code that makes sure the low-level USB buffer is drained.
|
|
|
|
// Waiting for low-level is handled in USBD_CDC_HAL_TIM_PeriodElapsedCallback.
|
|
|
|
/*
|
|
|
|
start = HAL_GetTick();
|
|
|
|
PCD_HandleTypeDef *hpcd = hUSBDDevice.pData;
|
|
|
|
if (hpcd->IN_ep[0x83 & 0x7f].is_in) {
|
|
|
|
//volatile uint32_t *xfer_count = &hpcd->IN_ep[0x83 & 0x7f].xfer_count;
|
|
|
|
//volatile uint32_t *xfer_len = &hpcd->IN_ep[0x83 & 0x7f].xfer_len;
|
|
|
|
USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
|
|
|
|
while (
|
|
|
|
// *xfer_count < *xfer_len // using this works
|
|
|
|
// (USBx_INEP(3)->DIEPTSIZ & USB_OTG_DIEPTSIZ_XFRSIZ) // using this works
|
|
|
|
&& HAL_GetTick() - start <= 2000) {
|
|
|
|
__WFI(); // enter sleep mode, waiting for interrupt
|
|
|
|
}
|
|
|
|
}
|
|
|
|
*/
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|
2014-04-16 15:51:27 +01:00
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
UserTxBuffer[UserTxBufPtrIn] = buf[i];
|
2014-03-15 16:54:23 +00:00
|
|
|
UserTxBufPtrIn = (UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
// Returns number of bytes in the rx buffer.
|
2014-03-15 16:54:23 +00:00
|
|
|
int USBD_CDC_RxNum(void) {
|
|
|
|
return UserRxBufLen - UserRxBufCur;
|
|
|
|
}
|
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
// timout in milliseconds.
|
|
|
|
// Returns number of bytes read from the device.
|
|
|
|
int USBD_CDC_Rx(uint8_t *buf, uint32_t len, uint32_t timeout) {
|
|
|
|
// loop to read bytes
|
|
|
|
for (uint32_t i = 0; i < len; i++) {
|
|
|
|
// Wait until we have at least 1 byte to read
|
|
|
|
uint32_t start = HAL_GetTick();
|
|
|
|
while (!dev_is_connected || UserRxBufLen == UserRxBufCur) {
|
|
|
|
// Wraparound of tick is taken care of by 2's complement arithmetic.
|
|
|
|
if (HAL_GetTick() - start >= timeout) {
|
|
|
|
// timeout
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
__WFI(); // enter sleep mode, waiting for interrupt
|
|
|
|
}
|
2014-03-15 16:54:23 +00:00
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
// Copy byte from device to user buffer
|
|
|
|
buf[i] = UserRxBuffer[UserRxBufCur++];
|
|
|
|
}
|
2014-03-23 18:54:48 +00:00
|
|
|
|
2014-07-31 10:30:42 +01:00
|
|
|
// Success, return number of bytes read
|
|
|
|
return len;
|
2014-03-15 16:54:23 +00:00
|
|
|
}
|