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[refactor][examples/usb_cdc] simplify usb out and in tranfer process

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This commit is contained in:
jzlv 2021-07-06 16:26:10 +08:00
parent f93a4898e3
commit 838c1881c4
1 changed files with 5 additions and 49 deletions
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54
examples/usb/usb_cdc_loopback/main.c
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@ -110,56 +110,24 @@ USB_DESC_SECTION const uint8_t cdc_descriptor[] = {
0x00
};
bool zlp_flag = false;
uint32_t actual_write_length = 0;
uint32_t total_recv_length = 0;
uint32_t rx_pos = 0;
uint8_t tx_pos = 0;
uint8_t out_buffer[4096];
void usbd_cdc_acm_bulk_out(uint8_t ep)
{
uint32_t actual_read_length = 0;
uint8_t out_buffer[64];
if (usbd_ep_read(ep, &out_buffer[rx_pos], 64, &actual_read_length) < 0) {
if (usbd_ep_read(ep, out_buffer, 64, &actual_read_length) < 0) {
USBD_LOG_DBG("Read DATA Packet failed\r\n");
usbd_ep_set_stall(ep);
return;
}
usbd_ep_read(ep, NULL, 0, NULL);
rx_pos += actual_read_length;
total_recv_length += actual_read_length;
actual_write_length = total_recv_length;
if (rx_pos > 4096) {
rx_pos = 0;
}
usbd_ep_write(CDC_IN_EP, out_buffer, actual_read_length, NULL);
}
void usbd_cdc_acm_bulk_in(uint8_t ep)
{
if ((zlp_flag == false) && actual_write_length) {
if (actual_write_length > 64) {
usbd_ep_write(ep, (uint8_t *)&out_buffer[tx_pos], 64, NULL);
actual_write_length -= 64;
tx_pos += 64;
} else {
usbd_ep_write(ep, (uint8_t *)&out_buffer[tx_pos], actual_write_length, NULL);
actual_write_length = 0;
tx_pos = 0;
total_recv_length = 0;
}
if (!actual_write_length && !(total_recv_length % 64)) {
MSG("zlp\r\n");
zlp_flag = true;
}
} else if (zlp_flag) {
usbd_ep_write(ep, NULL, 0, NULL);
zlp_flag = false;
}
}
usbd_class_t cdc_class;
@ -173,11 +141,9 @@ usbd_endpoint_t cdc_out_ep = {
usbd_endpoint_t cdc_in_ep = {
.ep_addr = CDC_IN_EP,
.ep_cb = usbd_cdc_acm_bulk_in
.ep_cb = NULL
};
#define USING_POLL_RTX
struct device *usb_fs;
extern struct device *usb_dc_init(void);
@ -195,22 +161,12 @@ int main(void)
usb_fs = usb_dc_init();
if (usb_fs) {
#ifndef USING_POLL_RTX
device_control(usb_fs, DEVICE_CTRL_SET_INT, (void *)(USB_EP1_DATA_OUT_IT | USB_EP2_DATA_IN_IT));
#endif
device_control(usb_fs, DEVICE_CTRL_SET_INT, (void *)(USB_EP1_DATA_OUT_IT));
}
while (!usb_device_is_configured()) {
}
while (1) {
#ifdef USING_POLL_RTX
if (usb_device_is_configured()) {
device_read(usb_fs, 0x01, out_buffer, 64);
device_write(usb_fs, 0x82, out_buffer, 64);
}
#endif
}
}