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[Components][Drivers][USB]vcom dma_tx模式下根据bulk in提交能力限制tx_ringbuffer的填充长度,避免对下次bulk in传输造成影响.

This commit is contained in:
ChunfengMu 2018-02-06 01:49:59 +08:00
parent 0979e30caa
commit a499c18072
1 changed files with 11 additions and 5 deletions
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16
components/drivers/usb/usbdevice/class/cdc_vcom.c
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@ -69,6 +69,7 @@ static struct rt_thread vcom_thread;
static struct ucdc_line_coding line_coding;
#define CDC_TX_BUFSIZE 1024
#define CDC_BULKIN_MAXSIZE (CDC_TX_BUFSIZE / 8)
#define CDC_TX_HAS_DATE 0x01
@ -255,12 +256,14 @@ static void _vcom_reset_state(ufunction_t func)
static rt_err_t _ep_in_handler(ufunction_t func, rt_size_t size)
{
struct vcom *data;
rt_size_t request_size;
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_in_handler %d\n", size));
data = (struct vcom*)func->user_data;
if ((size != 0) && ((size % EP_MAXPACKET(data->ep_in)) == 0))
request_size = data->ep_in->request.size;
RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_in_handler %d\n", request_size));
if ((request_size != 0) && ((request_size % EP_MAXPACKET(data->ep_in)) == 0))
{
/* don't have data right now. Send a zero-length-packet to
* terminate the transaction.
@ -677,7 +680,7 @@ static rt_size_t _vcom_tx(struct rt_serial_device *serial, rt_uint8_t *buf, rt_s
struct ufunction *func;
struct vcom *data;
rt_uint32_t baksize = size;
rt_uint32_t baksize;
rt_size_t ptr = 0;
int empty = 0;
rt_uint8_t crlf[2] = {'\r', '\n',};
@ -685,6 +688,9 @@ static rt_size_t _vcom_tx(struct rt_serial_device *serial, rt_uint8_t *buf, rt_s
func = (struct ufunction*)serial->parent.user_data;
data = (struct vcom*)func->user_data;
size = (size >= CDC_BULKIN_MAXSIZE) ? CDC_BULKIN_MAXSIZE : size;
baksize = size;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(buf != RT_NULL);
@ -805,7 +811,7 @@ static void vcom_tx_thread_entry(void* parameter)
rt_uint32_t res;
struct ufunction *func = (struct ufunction *)parameter;
struct vcom *data = (struct vcom*)func->user_data;
rt_uint8_t ch[64];
rt_uint8_t ch[CDC_BULKIN_MAXSIZE];
while (1)
{
@ -826,7 +832,7 @@ static void vcom_tx_thread_entry(void* parameter)
while(rt_ringbuffer_data_len(&data->tx_ringbuffer))
{
level = rt_hw_interrupt_disable();
res = rt_ringbuffer_get(&data->tx_ringbuffer, ch, 64);
res = rt_ringbuffer_get(&data->tx_ringbuffer, ch, CDC_BULKIN_MAXSIZE);
rt_hw_interrupt_enable(level);
if(!res)