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enable cdc auto flush on write()

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if there is enough data in the fifo
This commit is contained in:
hathach 2020-11-02 16:50:46 +07:00
parent 67ac40b98d
commit 6fcd540cb6
2 changed files with 12 additions and 10 deletions
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2
README.md
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@ -2,7 +2,7 @@
![tinyUSB_240x100](https://user-images.githubusercontent.com/249515/62646655-f9393200-b978-11e9-9c53-484862f15503.png)
[![Build Status](https://github.com/hathach/tinyusb/workflows/Build/badge.svg)](https://github.com/hathach/tinyusb/actions) [![License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT) [![Coverity](https://img.shields.io/coverity/scan/458.svg)](https://scan.coverity.com/projects/tinyusb)
[![Build Status](https://github.com/hathach/tinyusb/workflows/Build/badge.svg)](https://github.com/hathach/tinyusb/actions) [![License](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT)
TinyUSB is an open-source cross-platform USB Host/Device stack for embedded system, designed to be memory-safe with no dynamic allocation and thread-safe with all interrupt events are deferred then handled in the non-ISR task function.

20
src/class/cdc/cdc_device.c
View File

@ -34,6 +34,11 @@
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
enum
{
BULK_PACKET_SIZE = (TUD_OPT_HIGH_SPEED ? 512 : 64)
};
typedef struct
{
uint8_t itf_num;
@ -160,13 +165,11 @@ uint32_t tud_cdc_n_write(uint8_t itf, void const* buffer, uint32_t bufsize)
cdcd_interface_t* p_cdc = &_cdcd_itf[itf];
uint16_t ret = tu_fifo_write_n(&p_cdc->tx_ff, buffer, bufsize);
#if 0 // TODO issue with circuitpython's REPL
// flush if queue more than endpoint size
if ( tu_fifo_count(&p_cdc->tx_ff) >= CFG_TUD_CDC_EP_BUFSIZE )
// flush if queue more than packet size
if ( tu_fifo_count(&p_cdc->tx_ff) >= BULK_PACKET_SIZE )
{
tud_cdc_n_write_flush(itf);
}
#endif
return ret;
}
@ -250,8 +253,8 @@ void cdcd_reset(uint8_t rhport)
uint16_t cdcd_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len)
{
// Only support ACM subclass
TU_VERIFY ( TUSB_CLASS_CDC == itf_desc->bInterfaceClass &&
CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL == itf_desc->bInterfaceSubClass, 0);
TU_VERIFY( TUSB_CLASS_CDC == itf_desc->bInterfaceClass &&
CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL == itf_desc->bInterfaceSubClass, 0);
// Note: 0xFF can be used with RNDIS
TU_VERIFY(tu_within(CDC_COMM_PROTOCOL_NONE, itf_desc->bInterfaceProtocol, CDC_COMM_PROTOCOL_ATCOMMAND_CDMA), 0);
@ -446,9 +449,8 @@ bool cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_
if ( 0 == tud_cdc_n_write_flush(itf) )
{
// If there is no data left, a ZLP should be sent if
// xferred_bytes is multiple of EP size and not zero
// FIXME CFG_TUD_CDC_EP_BUFSIZE is not Endpoint packet size
if ( !tu_fifo_count(&p_cdc->tx_ff) && xferred_bytes && (0 == (xferred_bytes % CFG_TUD_CDC_EP_BUFSIZE)) )
// xferred_bytes is multiple of EP Packet size and not zero
if ( !tu_fifo_count(&p_cdc->tx_ff) && xferred_bytes && (0 == (xferred_bytes & (BULK_PACKET_SIZE-1))) )
{
if ( usbd_edpt_claim(rhport, p_cdc->ep_in) )
{