有人知道如何使用libusb_control_transfer读取CH340的CTS引脚吗?我可以使用以下代码写到RTS:
libusb_control_transfer( handle, // libusb_device_handle * dev_handle
CTRL_OUT, // uint8_t bmRequestType
0xA4, // uint8_t bRequest
1<<6, // uint16_t wValue
0, // uint16_t wIndex
NULL, // unsigned char *data
0, // uint16_t wLength
1000); // unsigned int timeout
所以我认为也许可以做同样的事情来读取CTS引脚的状态?
libusb_control_transfer( handle,
CTRL_IN,
0x95,
0x0706,
0,
&ind[0],
2,
1000);