HWCDC sometimes failed to write bytes data at once if length larger than 64. #10212
Description
Board
YD-ESP32-S3
Device Description
YD-ESP32-S3 http://vcc-gnd.cn/vcc_gnd/YD-ESP32-S3
Hardware Configuration
USB and Serial0 connected to pc.
Version
v3.0.3
IDE Name
Arduino IDE
Operating System
Windows 10
Flash frequency
80Hz
PSRAM enabled
no
Upload speed
115200
Description
HWCDC failed to write 64 bytes data at once, It didn't send it immediately, the data still in buffer.
If the data is smaller than 64 bytes, It also failed randomly, but I haven't find a way to repeat it.
Sketch
#define TEST_BUFFER_SIZE (8192)
static uint8_t test_buffer[TEST_BUFFER_SIZE];
void setup()
{
Serial0.begin(115200);
HWCDCSerial.begin();
Serial0.print("setup done");
}
void loop()
{
static int sent_size = 0;
int avaliable = HWCDCSerial.available();
if (avaliable <= 0) {
delay(3);
return;
}
avaliable = min(avaliable, TEST_BUFFER_SIZE);
HWCDCSerial.readBytes(test_buffer, avaliable);
sent_size += HWCDCSerial.write(test_buffer, avaliable);
Serial0.printf("sent_size: %d\n", sent_size);
}import serial
import argparse
def echo_client(ser:serial.Serial, block_size=64):
received_len = 0
tx_data = b"H" * block_size
# while True:
for i in range(1000):
ser.write(tx_data)
rx_data = ser.read(len(tx_data))
received_len += len(rx_data)
if rx_data == tx_data:
print("OK")
else:
raise Exception(f"NG, len(rx_data)={len(rx_data)}, received_len={received_len}, rx_data={rx_data}")
def main():
parser = argparse.ArgumentParser(description="Serial echo")
parser.add_argument("port", help="Serial port")
parser.add_argument("--baudrate", help="Baudrate", type=int, default=115200)
parser.add_argument("--dtr", help="DTR", action="store_true")
parser.add_argument("--rts", help="RTS", action="store_true")
parser.add_argument("--timeout", help="Timeout", type=float, default=5.0)
parser.add_argument("--block_size", help="Block size", type=int, default=64)
args = parser.parse_args()
print(args)
ser = serial.Serial(None)
ser.port = args.port
ser.baudrate = args.baudrate
ser.dtr = args.dtr
ser.rts = args.rts
ser.timeout = args.timeout
ser.open()
echo_client(ser, args.block_size)
if __name__ == "__main__":
main()Debug Message
serial0 output
setup done
sent_size: 64
python stdout
PS D:\repo\python-utils> python .\serial_echo_client.py COM15 --block_size 64
Namespace(port='COM15', baudrate=115200, dtr=False, rts=False, timeout=5.0, block_size=64)
Traceback (most recent call last):
File "D:\repo\python-utils\serial_echo_client.py", line 41, in <module>
main()
File "D:\repo\python-utils\serial_echo_client.py", line 38, in main
echo_client(ser, args.block_size)
File "D:\repo\python-utils\serial_echo_client.py", line 15, in echo_client
raise Exception(f"NG, len(rx_data)={len(rx_data)}, received_len={received_len}, rx_data={rx_data}")
Exception: NG, len(rx_data)=0, received_len=0, rx_data=b''
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.