mirror of
https://bitbucket.org/librepilot/librepilot.git
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f4 usb cdc: implement CDC class driver for STM32 F4 SoCs
This commit is contained in:
Stacey Sheldon
Alessio Morale
parent
19714d2316
commit
f4bed187f4
@ -35,7 +35,9 @@
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#include "pios_usb_cdc_priv.h"
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#include "pios_usb_board_data.h" /* PIOS_BOARD_*_DATA_LENGTH */
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#include "pios_usbhook.h" /* PIOS_USBHOOK_* */
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/* Implement COM layer driver API */
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static void PIOS_USB_CDC_RegisterTxCallback(uint32_t usbcdc_id, pios_com_callback tx_out_cb, uint32_t context);
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static void PIOS_USB_CDC_RegisterRxCallback(uint32_t usbcdc_id, pios_com_callback rx_in_cb, uint32_t context);
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static void PIOS_USB_CDC_TxStart(uint32_t usbcdc_id, uint16_t tx_bytes_avail);
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@ -64,11 +66,25 @@ struct pios_usb_cdc_dev {
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pios_com_callback tx_out_cb;
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uint32_t tx_out_context;
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bool usb_ctrl_if_enabled;
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bool usb_data_if_enabled;
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uint8_t rx_packet_buffer[PIOS_USB_BOARD_CDC_DATA_LENGTH];
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volatile bool rx_active;
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uint8_t tx_packet_buffer[PIOS_USB_BOARD_CDC_DATA_LENGTH];
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volatile bool tx_active;
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uint8_t ctrl_tx_packet_buffer[PIOS_USB_BOARD_CDC_MGMT_LENGTH];
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uint32_t rx_dropped;
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uint32_t rx_oversize;
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/*
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* Used to hold the current state of the simulated UART. Changes to this
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* variable may trigger new USB CDC Notification packets to be sent to the host.
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*/
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volatile uint16_t prev_uart_state;
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};
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static bool PIOS_USB_CDC_validate(struct pios_usb_cdc_dev * usb_cdc_dev)
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@ -105,16 +121,34 @@ static struct pios_usb_cdc_dev * PIOS_USB_CDC_alloc(void)
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}
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#endif
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static void PIOS_USB_CDC_DATA_EP_IN_Callback(void);
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static void PIOS_USB_CDC_DATA_EP_OUT_Callback(void);
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static void PIOS_USB_CDC_CTRL_EP_IN_Callback(void);
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/* Implement USB_IFOPS for CDC Control Interface */
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static void PIOS_USB_CDC_CTRL_IF_Init(uint32_t usb_cdc_id);
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static void PIOS_USB_CDC_CTRL_IF_DeInit(uint32_t usb_cdc_id);
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static bool PIOS_USB_CDC_CTRL_IF_Setup(uint32_t usb_cdc_id, struct usb_setup_request *req);
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static void PIOS_USB_CDC_CTRL_IF_CtrlDataOut(uint32_t usb_cdc_id, const struct usb_setup_request *req);
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static struct pios_usb_ifops usb_cdc_ctrl_ifops = {
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.init = PIOS_USB_CDC_CTRL_IF_Init,
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.deinit = PIOS_USB_CDC_CTRL_IF_DeInit,
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.setup = PIOS_USB_CDC_CTRL_IF_Setup,
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.ctrl_data_out = PIOS_USB_CDC_CTRL_IF_CtrlDataOut,
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};
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/* Implement USB_IFOPS for CDC Data Interface */
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static void PIOS_USB_CDC_DATA_IF_Init(uint32_t usb_cdc_id);
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static void PIOS_USB_CDC_DATA_IF_DeInit(uint32_t usb_cdc_id);
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static bool PIOS_USB_CDC_DATA_IF_Setup(uint32_t usb_cdc_id, struct usb_setup_request *req);
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static void PIOS_USB_CDC_DATA_IF_CtrlDataOut(uint32_t usb_cdc_id, const struct usb_setup_request *req);
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static struct pios_usb_ifops usb_cdc_data_ifops = {
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.init = PIOS_USB_CDC_DATA_IF_Init,
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.deinit = PIOS_USB_CDC_DATA_IF_DeInit,
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.setup = PIOS_USB_CDC_DATA_IF_Setup,
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.ctrl_data_out = PIOS_USB_CDC_DATA_IF_CtrlDataOut,
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};
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static uint32_t pios_usb_cdc_id;
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/* Need a better way to pull these in */
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extern void (*pEpInt_IN[7])(void);
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extern void (*pEpInt_OUT[7])(void);
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int32_t PIOS_USB_CDC_Init(uint32_t * usbcdc_id, const struct pios_usb_cdc_cfg * cfg, uint32_t lower_id)
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{
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PIOS_Assert(usbcdc_id);
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@ -131,10 +165,24 @@ int32_t PIOS_USB_CDC_Init(uint32_t * usbcdc_id, const struct pios_usb_cdc_cfg *
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pios_usb_cdc_id = (uint32_t) usb_cdc_dev;
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/* Bind lower level callbacks into the USB infrastructure */
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pEpInt_OUT[cfg->ctrl_tx_ep - 1] = PIOS_USB_CDC_CTRL_EP_IN_Callback;
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pEpInt_IN[cfg->data_tx_ep - 1] = PIOS_USB_CDC_DATA_EP_IN_Callback;
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pEpInt_OUT[cfg->data_rx_ep - 1] = PIOS_USB_CDC_DATA_EP_OUT_Callback;
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/* Rx and Tx are not active yet */
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usb_cdc_dev->rx_active = false;
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usb_cdc_dev->tx_active = false;
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/* Clear stats */
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usb_cdc_dev->rx_dropped = 0;
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usb_cdc_dev->rx_oversize = 0;
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/* Initialize the uart state */
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usb_cdc_dev->prev_uart_state = 0;
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/* Register class specific interface callbacks with the USBHOOK layer */
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usb_cdc_dev->usb_ctrl_if_enabled = false;
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PIOS_USBHOOK_RegisterIfOps(cfg->ctrl_if, &usb_cdc_ctrl_ifops, (uint32_t) usb_cdc_dev);
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/* Register class specific interface callbacks with the USBHOOK layer */
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usb_cdc_dev->usb_data_if_enabled = false;
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PIOS_USBHOOK_RegisterIfOps(cfg->data_if, &usb_cdc_data_ifops, (uint32_t) usb_cdc_dev);
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*usbcdc_id = (uint32_t) usb_cdc_dev;
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@ -144,7 +192,88 @@ out_fail:
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return -1;
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}
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static bool PIOS_USB_CDC_SendData(struct pios_usb_cdc_dev * usb_cdc_dev)
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{
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uint16_t bytes_to_tx;
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if (!usb_cdc_dev->tx_out_cb) {
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return false;
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}
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bool need_yield = false;
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bytes_to_tx = (usb_cdc_dev->tx_out_cb)(usb_cdc_dev->tx_out_context,
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usb_cdc_dev->tx_packet_buffer,
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sizeof(usb_cdc_dev->tx_packet_buffer),
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NULL,
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&need_yield);
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if (bytes_to_tx == 0) {
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return false;
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}
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/*
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* Mark this endpoint as being tx active _before_ actually transmitting
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* to make sure we don't race with the Tx completion interrupt
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*/
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usb_cdc_dev->tx_active = true;
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PIOS_USBHOOK_EndpointTx(usb_cdc_dev->cfg->data_tx_ep,
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usb_cdc_dev->tx_packet_buffer,
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bytes_to_tx);
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#if defined(PIOS_INCLUDE_FREERTOS)
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if (need_yield) {
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vPortYieldFromISR();
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}
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#endif /* PIOS_INCLUDE_FREERTOS */
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return true;
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}
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static void PIOS_USB_CDC_RxStart(uint32_t usbcdc_id, uint16_t rx_bytes_avail) {
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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/* Make sure this USB interface has been initialized */
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if (!usb_cdc_dev->usb_data_if_enabled) {
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return;
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}
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if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
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return;
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}
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// If endpoint was stalled and there is now space make it valid
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if (!usb_cdc_dev->rx_active && (rx_bytes_avail >= PIOS_USB_BOARD_CDC_DATA_LENGTH)) {
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PIOS_USBHOOK_EndpointRx(usb_cdc_dev->cfg->data_rx_ep,
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usb_cdc_dev->rx_packet_buffer,
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sizeof(usb_cdc_dev->rx_packet_buffer));
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usb_cdc_dev->rx_active = true;
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}
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}
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static void PIOS_USB_CDC_TxStart(uint32_t usbcdc_id, uint16_t tx_bytes_avail)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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/* Make sure this USB interface has been initialized */
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if (!usb_cdc_dev->usb_data_if_enabled) {
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return;
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}
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if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
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return;
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}
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if (!usb_cdc_dev->tx_active) {
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/* Transmitter is not currently active, send a report */
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PIOS_USB_CDC_SendData(usb_cdc_dev);
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}
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}
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static void PIOS_USB_CDC_RegisterRxCallback(uint32_t usbcdc_id, pios_com_callback rx_in_cb, uint32_t context)
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{
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@ -176,158 +305,37 @@ static void PIOS_USB_CDC_RegisterTxCallback(uint32_t usbcdc_id, pios_com_callbac
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usb_cdc_dev->tx_out_cb = tx_out_cb;
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}
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static void PIOS_USB_CDC_RxStart(uint32_t usbcdc_id, uint16_t rx_bytes_avail) {
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
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static bool PIOS_USB_CDC_CTRL_EP_IN_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len);
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
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return;
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}
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// If endpoint was stalled and there is now space make it valid
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PIOS_IRQ_Disable();
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if ((GetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep) != EP_RX_VALID) &&
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(rx_bytes_avail >= sizeof(usb_cdc_dev->rx_packet_buffer))) {
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SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_VALID);
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}
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PIOS_IRQ_Enable();
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}
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static void PIOS_USB_CDC_SendData(struct pios_usb_cdc_dev * usb_cdc_dev)
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static void PIOS_USB_CDC_CTRL_IF_Init(uint32_t usb_cdc_id)
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{
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uint16_t bytes_to_tx;
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
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if (!usb_cdc_dev->tx_out_cb) {
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if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
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return;
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}
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bool need_yield = false;
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bytes_to_tx = (usb_cdc_dev->tx_out_cb)(usb_cdc_dev->tx_out_context,
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usb_cdc_dev->tx_packet_buffer,
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sizeof(usb_cdc_dev->tx_packet_buffer),
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NULL,
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&need_yield);
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if (bytes_to_tx == 0) {
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return;
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}
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UserToPMABufferCopy(usb_cdc_dev->tx_packet_buffer,
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GetEPTxAddr(usb_cdc_dev->cfg->data_tx_ep),
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bytes_to_tx);
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SetEPTxCount(usb_cdc_dev->cfg->data_tx_ep, bytes_to_tx);
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SetEPTxValid(usb_cdc_dev->cfg->data_tx_ep);
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#if defined(PIOS_INCLUDE_FREERTOS)
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if (need_yield) {
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vPortYieldFromISR();
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}
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#endif /* PIOS_INCLUDE_FREERTOS */
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/* Register endpoint specific callbacks with the USBHOOK layer */
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PIOS_USBHOOK_RegisterEpInCallback(usb_cdc_dev->cfg->ctrl_tx_ep,
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sizeof(usb_cdc_dev->ctrl_tx_packet_buffer),
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PIOS_USB_CDC_CTRL_EP_IN_Callback,
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(uint32_t) usb_cdc_dev);
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usb_cdc_dev->usb_ctrl_if_enabled = true;
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}
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static void PIOS_USB_CDC_TxStart(uint32_t usbcdc_id, uint16_t tx_bytes_avail)
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static void PIOS_USB_CDC_CTRL_IF_DeInit(uint32_t usb_cdc_id)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
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if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
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return;
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}
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if (GetEPTxStatus(usb_cdc_dev->cfg->data_tx_ep) == EP_TX_VALID) {
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/* Endpoint is already transmitting */
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return;
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}
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PIOS_USB_CDC_SendData(usb_cdc_dev);
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}
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static void PIOS_USB_CDC_DATA_EP_IN_Callback(void)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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PIOS_USB_CDC_SendData(usb_cdc_dev);
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}
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static void PIOS_USB_CDC_DATA_EP_OUT_Callback(void)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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uint32_t DataLength;
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/* Get the number of received data on the selected Endpoint */
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DataLength = GetEPRxCount(usb_cdc_dev->cfg->data_rx_ep);
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if (DataLength > sizeof(usb_cdc_dev->rx_packet_buffer)) {
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usb_cdc_dev->rx_oversize++;
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DataLength = sizeof(usb_cdc_dev->rx_packet_buffer);
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}
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/* Use the memory interface function to read from the selected endpoint */
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PMAToUserBufferCopy((uint8_t *) usb_cdc_dev->rx_packet_buffer,
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GetEPRxAddr(usb_cdc_dev->cfg->data_rx_ep),
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DataLength);
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if (!usb_cdc_dev->rx_in_cb) {
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/* No Rx call back registered, disable the receiver */
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SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_NAK);
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return;
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}
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uint16_t headroom;
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bool need_yield = false;
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uint16_t rc;
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rc = (usb_cdc_dev->rx_in_cb)(usb_cdc_dev->rx_in_context,
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usb_cdc_dev->rx_packet_buffer,
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DataLength,
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&headroom,
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&need_yield);
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if (rc < DataLength) {
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/* Lost bytes on rx */
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usb_cdc_dev->rx_dropped += (DataLength - rc);
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}
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if (headroom >= sizeof(usb_cdc_dev->rx_packet_buffer)) {
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/* We have room for a maximum length message */
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SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_VALID);
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} else {
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/* Not enough room left for a message, apply backpressure */
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SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_NAK);
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}
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#if defined(PIOS_INCLUDE_FREERTOS)
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if (need_yield) {
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vPortYieldFromISR();
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}
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#endif /* PIOS_INCLUDE_FREERTOS */
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}
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RESULT PIOS_USB_CDC_SetControlLineState(void)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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static uint16_t control_line_state;
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uint8_t wValue0 = pInformation->USBwValue0;
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uint8_t wValue1 = pInformation->USBwValue1;
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control_line_state = wValue1 << 8 | wValue0;
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return USB_SUCCESS;
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/* DeRegister endpoint specific callbacks with the USBHOOK layer */
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usb_cdc_dev->usb_data_if_enabled = false;
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}
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static uint8_t cdc_altset;
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static struct usb_cdc_line_coding line_coding = {
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.dwDTERate = htousbl(57600),
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.bCharFormat = USB_CDC_LINE_CODING_STOP_1,
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@ -335,41 +343,124 @@ static struct usb_cdc_line_coding line_coding = {
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.bDataBits = 8,
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};
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RESULT PIOS_USB_CDC_SetLineCoding(void)
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static uint16_t control_line_state;
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static bool PIOS_USB_CDC_CTRL_IF_Setup(uint32_t usb_cdc_id, struct usb_setup_request *req)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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return USB_SUCCESS;
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}
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const uint8_t *PIOS_USB_CDC_GetLineCoding(uint16_t Length)
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{
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struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
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bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
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PIOS_Assert(valid);
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if (Length == 0) {
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pInformation->Ctrl_Info.Usb_wLength = sizeof(line_coding);
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return NULL;
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} else {
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return ((uint8_t *) &line_coding);
|
||||
if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Make sure this is a request for an interface we know about */
|
||||
uint8_t ifnum = req->wIndex & 0xFF;
|
||||
if (ifnum != usb_cdc_dev->cfg->ctrl_if) {
|
||||
return (false);
|
||||
}
|
||||
|
||||
switch (req->bmRequestType & (USB_REQ_TYPE_MASK | USB_REQ_RECIPIENT_MASK)) {
|
||||
case (USB_REQ_TYPE_STANDARD | USB_REQ_RECIPIENT_INTERFACE):
|
||||
switch (req->bRequest) {
|
||||
case USB_REQ_GET_INTERFACE:
|
||||
PIOS_USBHOOK_CtrlTx(&cdc_altset, 1);
|
||||
break;
|
||||
case USB_REQ_SET_INTERFACE:
|
||||
cdc_altset = (uint8_t)(req->wValue);
|
||||
break;
|
||||
default:
|
||||
/* Unhandled standard request */
|
||||
return false;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case (USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE):
|
||||
switch (req->bRequest) {
|
||||
case USB_CDC_REQ_SET_LINE_CODING:
|
||||
PIOS_USBHOOK_CtrlRx((uint8_t *)&line_coding, sizeof(line_coding));
|
||||
break;
|
||||
case USB_CDC_REQ_GET_LINE_CODING:
|
||||
PIOS_USBHOOK_CtrlTx((uint8_t *)&line_coding, sizeof(line_coding));
|
||||
break;
|
||||
case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
|
||||
control_line_state = req->wValue;
|
||||
break;
|
||||
default:
|
||||
/* Unhandled class request */
|
||||
return false;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/* Unhandled request */
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
struct usb_cdc_serial_state_report uart_state = {
|
||||
/**
|
||||
* Called *after* the data has been written to the buffer provided in the setup stage. The
|
||||
* setup request is passed in here again so we know *which* EP0 data out has just completed.
|
||||
*/
|
||||
static void PIOS_USB_CDC_CTRL_IF_CtrlDataOut(uint32_t usb_cdc_id, const struct usb_setup_request *req)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
|
||||
|
||||
if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Make sure this is a request for an interface we know about */
|
||||
uint8_t ifnum = req->wIndex & 0xFF;
|
||||
if (ifnum != usb_cdc_dev->cfg->ctrl_if) {
|
||||
return;
|
||||
}
|
||||
|
||||
switch (req->bmRequestType & (USB_REQ_TYPE_MASK | USB_REQ_RECIPIENT_MASK)) {
|
||||
case (USB_REQ_TYPE_STANDARD | USB_REQ_RECIPIENT_INTERFACE):
|
||||
switch (req->bRequest) {
|
||||
default:
|
||||
/* Unhandled standard request */
|
||||
return;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case (USB_REQ_TYPE_CLASS | USB_REQ_RECIPIENT_INTERFACE):
|
||||
switch (req->bRequest) {
|
||||
case USB_CDC_REQ_SET_LINE_CODING:
|
||||
/*
|
||||
* If we cared to, this is where we would apply the new line coding
|
||||
* that is now stored in the line_coding struct. This could be used
|
||||
* to notify the upper COM layer that the baud rate has changed. This
|
||||
* may be useful in the case of a COM USB bridge where we would
|
||||
* auto-adjust the USART baud rate based on the line coding set here.
|
||||
*/
|
||||
break;
|
||||
default:
|
||||
/* Unhandled class request */
|
||||
return;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/* Unhandled request */
|
||||
return;
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static struct usb_cdc_serial_state_report uart_state = {
|
||||
.bmRequestType = 0xA1,
|
||||
.bNotification = USB_CDC_NOTIFICATION_SERIAL_STATE,
|
||||
.wValue = 0,
|
||||
.wIndex = htousbs(1),
|
||||
.wLength = htousbs(2),
|
||||
.bmUartState = htousbs(0),
|
||||
.bmUartState = htousbs(0),
|
||||
};
|
||||
|
||||
static void PIOS_USB_CDC_CTRL_EP_IN_Callback(void)
|
||||
static bool PIOS_USB_CDC_CTRL_EP_IN_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
|
||||
|
||||
@ -387,13 +478,159 @@ static void PIOS_USB_CDC_CTRL_EP_IN_Callback(void)
|
||||
* 1: bTxCarrier DSR
|
||||
* 0: bRxCarrier DCD
|
||||
*/
|
||||
uart_state.bmUartState = htousbs(0x0003);
|
||||
|
||||
UserToPMABufferCopy((uint8_t *) &uart_state,
|
||||
GetEPTxAddr(usb_cdc_dev->cfg->data_tx_ep),
|
||||
sizeof(uart_state));
|
||||
SetEPTxCount(usb_cdc_dev->cfg->data_tx_ep, PIOS_USB_BOARD_CDC_MGMT_LENGTH);
|
||||
SetEPTxValid(usb_cdc_dev->cfg->data_tx_ep);
|
||||
/* Currently, we only handle TxCarrier and RxCarrier reporting */
|
||||
uint16_t new_uart_state = 0;
|
||||
if (usb_cdc_dev->tx_out_cb) {
|
||||
/* Someone is going to providing FC->PC data, advertise an RxCarrier to the host */
|
||||
new_uart_state |= 0x1;
|
||||
}
|
||||
if (usb_cdc_dev->rx_in_cb) {
|
||||
/* Someone is consuming PC->FC data, advertise a TxCarrier to the host */
|
||||
new_uart_state |= 0x2;
|
||||
}
|
||||
|
||||
/* Has anything changed since we last sent a notification? */
|
||||
if ((new_uart_state ^ usb_cdc_dev->prev_uart_state) & 0x3) {
|
||||
usb_cdc_dev->prev_uart_state = new_uart_state;
|
||||
|
||||
uart_state.bmUartState = htousbs(new_uart_state);
|
||||
|
||||
PIOS_USBHOOK_EndpointTx(usb_cdc_dev->cfg->ctrl_tx_ep,
|
||||
(uint8_t *)&uart_state,
|
||||
sizeof(uart_state));
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool PIOS_USB_CDC_DATA_EP_IN_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len);
|
||||
static bool PIOS_USB_CDC_DATA_EP_OUT_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len);
|
||||
|
||||
static void PIOS_USB_CDC_DATA_IF_Init(uint32_t usb_cdc_id)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
|
||||
|
||||
if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Register endpoint specific callbacks with the USBHOOK layer */
|
||||
PIOS_USBHOOK_RegisterEpInCallback(usb_cdc_dev->cfg->data_tx_ep,
|
||||
sizeof(usb_cdc_dev->tx_packet_buffer),
|
||||
PIOS_USB_CDC_DATA_EP_IN_Callback,
|
||||
(uint32_t) usb_cdc_dev);
|
||||
PIOS_USBHOOK_RegisterEpOutCallback(usb_cdc_dev->cfg->data_rx_ep,
|
||||
sizeof(usb_cdc_dev->rx_packet_buffer),
|
||||
PIOS_USB_CDC_DATA_EP_OUT_Callback,
|
||||
(uint32_t) usb_cdc_dev);
|
||||
usb_cdc_dev->usb_data_if_enabled = true;
|
||||
}
|
||||
|
||||
static void PIOS_USB_CDC_DATA_IF_DeInit(uint32_t usb_cdc_id)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usb_cdc_id;
|
||||
|
||||
if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* DeRegister endpoint specific callbacks with the USBHOOK layer */
|
||||
usb_cdc_dev->usb_data_if_enabled = false;
|
||||
PIOS_USBHOOK_DeRegisterEpInCallback(usb_cdc_dev->cfg->data_tx_ep);
|
||||
PIOS_USBHOOK_DeRegisterEpOutCallback(usb_cdc_dev->cfg->data_rx_ep);
|
||||
}
|
||||
|
||||
static bool PIOS_USB_CDC_DATA_IF_Setup(uint32_t usb_cdc_id, struct usb_setup_request *req)
|
||||
{
|
||||
/* There are no valid EP0 transactions for CDC DATA interfaces */
|
||||
PIOS_Assert(0);
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Called *after* the data has been written to the buffer provided in the setup stage. The
|
||||
* setup request is passed in here again so we know *which* EP0 data out has just completed.
|
||||
*/
|
||||
static void PIOS_USB_CDC_DATA_IF_CtrlDataOut(uint32_t usb_cdc_id, const struct usb_setup_request *req)
|
||||
{
|
||||
/* CDC DATA interfaces don't have any OUT data stages on the control endpoint */
|
||||
PIOS_Assert(0);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Callback used to indicate a transmission from device INto host completed
|
||||
* Checks if any data remains, pads it into HID packet and sends.
|
||||
*/
|
||||
static bool PIOS_USB_CDC_DATA_EP_IN_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
|
||||
|
||||
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
|
||||
PIOS_Assert(valid);
|
||||
|
||||
bool rc = PIOS_USB_CDC_SendData(usb_cdc_dev);
|
||||
if (!rc) {
|
||||
/* No additional data was transmitted, note that tx is no longer active */
|
||||
usb_cdc_dev->tx_active = false;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static bool PIOS_USB_CDC_DATA_EP_OUT_Callback(uint32_t usb_cdc_id, uint8_t epnum, uint16_t len)
|
||||
{
|
||||
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
|
||||
|
||||
if (!PIOS_USB_CDC_validate(usb_cdc_dev)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (len > sizeof(usb_cdc_dev->rx_packet_buffer)) {
|
||||
len = sizeof(usb_cdc_dev->rx_packet_buffer);
|
||||
}
|
||||
|
||||
if (!usb_cdc_dev->rx_in_cb) {
|
||||
/* No Rx call back registered, disable the receiver */
|
||||
usb_cdc_dev->rx_active = false;
|
||||
return false;
|
||||
}
|
||||
|
||||
uint16_t headroom;
|
||||
bool need_yield = false;
|
||||
uint16_t bytes_rxed;
|
||||
bytes_rxed = (usb_cdc_dev->rx_in_cb)(usb_cdc_dev->rx_in_context,
|
||||
usb_cdc_dev->rx_packet_buffer,
|
||||
len,
|
||||
&headroom,
|
||||
&need_yield);
|
||||
|
||||
if (bytes_rxed < len) {
|
||||
/* Lost bytes on rx */
|
||||
usb_cdc_dev->rx_dropped += (len - bytes_rxed);
|
||||
}
|
||||
|
||||
bool rc;
|
||||
if (headroom >= sizeof(usb_cdc_dev->rx_packet_buffer)) {
|
||||
/* We have room for a maximum length message */
|
||||
PIOS_USBHOOK_EndpointRx(usb_cdc_dev->cfg->data_rx_ep,
|
||||
usb_cdc_dev->rx_packet_buffer,
|
||||
sizeof(usb_cdc_dev->rx_packet_buffer));
|
||||
rc = true;
|
||||
} else {
|
||||
/* Not enough room left for a message, apply backpressure */
|
||||
usb_cdc_dev->rx_active = false;
|
||||
rc = false;
|
||||
}
|
||||
|
||||
#if defined(PIOS_INCLUDE_FREERTOS)
|
||||
if (need_yield) {
|
||||
vPortYieldFromISR();
|
||||
}
|
||||
#endif /* PIOS_INCLUDE_FREERTOS */
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
#endif /* PIOS_INCLUDE_USB_CDC */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user