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Code Issues Releases Activity

LP-602 Improvement to usb_dcd. Activate rx handler always, even if it seems unneeded. Otherwise reading from DCD will fail if a module tries to read data before USB is connected.

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This commit is contained in:
Eric Price 2018-10-19 16:25:27 +02:00
parent 4c9b17903e
commit f162bbf331
1 changed files with 5 additions and 12 deletions
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17
flight/pios/stm32f4xx/pios_usb_cdc.c
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@ -91,9 +91,8 @@ struct pios_usb_cdc_dev {
* that are strictly < maxPacketSize for this interface which means we never have
* to bother with zero length packets (ZLP).
*/
uint8_t tx_packet_buffer[PIOS_USB_BOARD_CDC_DATA_LENGTH - 1] __attribute__((aligned(4)));
uint8_t tx_packet_buffer[PIOS_USB_BOARD_CDC_DATA_LENGTH - 1] __attribute__((aligned(4)));
volatile bool tx_active;
volatile bool rx_active;
uint8_t ctrl_tx_packet_buffer[PIOS_USB_BOARD_CDC_MGMT_LENGTH] __attribute__((aligned(4)));
@ -194,7 +193,6 @@ int32_t PIOS_USB_CDC_Init(uint32_t *usbcdc_id, const struct pios_usb_cdc_cfg *cf
/* Tx and Rx are not active yet */
usb_cdc_dev->tx_active = false;
usb_cdc_dev->rx_active = false;
/* Clear stats */
usb_cdc_dev->rx_dropped = 0;
@ -281,7 +279,6 @@ static void PIOS_USB_CDC_RxStart(uint32_t usbcdc_id, uint16_t rx_bytes_avail)
PIOS_USBHOOK_EndpointRx(usb_cdc_dev->cfg->data_rx_ep,
usb_cdc_dev->rx_packet_buffer,
sizeof(usb_cdc_dev->rx_packet_buffer));
usb_cdc_dev->rx_active = true;
}
}
@ -611,12 +608,10 @@ static void PIOS_USB_CDC_DATA_IF_Init(uint32_t usb_cdc_id)
(uint32_t)usb_cdc_dev);
usb_cdc_dev->usb_data_if_enabled = true;
usb_cdc_dev->tx_active = false;
/* Check if rx was previously active, if so we need to reactivate */
if (usb_cdc_dev->rx_active) {
PIOS_USBHOOK_EndpointRx(usb_cdc_dev->cfg->data_rx_ep,
usb_cdc_dev->rx_packet_buffer,
sizeof(usb_cdc_dev->rx_packet_buffer));
}
/* Activate rx prophylactically */
PIOS_USBHOOK_EndpointRx(usb_cdc_dev->cfg->data_rx_ep,
usb_cdc_dev->rx_packet_buffer,
sizeof(usb_cdc_dev->rx_packet_buffer));
}
static void PIOS_USB_CDC_DATA_IF_DeInit(uint32_t usb_cdc_id)
@ -720,11 +715,9 @@ static bool PIOS_USB_CDC_DATA_EP_OUT_Callback(
usb_cdc_dev->rx_packet_buffer,
sizeof(usb_cdc_dev->rx_packet_buffer));
rc = true;
usb_cdc_dev->rx_active = true;
} else {
/* Not enough room left for a message, apply backpressure */
rc = false;
usb_cdc_dev->rx_active = false;
}
#if defined(PIOS_INCLUDE_FREERTOS)