UART Parity bit missing

[shih91]

Hey guys,

I have been playing with ESP32 module for the past few days. I have gotten around activating UART1 using IO 9 (RX) and IO 10 (TX). The following code is my UART setting:

Code: Select all

        int uart_num = 1;                                       //uart port number
        uart_config_t uart_config = {
                .baud_rate = 19200,                    //baudrate
                .data_bits = UART_DATA_8_BITS,                       //data bit mode
                .parity = UART_PARITY_EVEN,                       //parity mode
                .stop_bits = UART_STOP_BITS_1,                       //stop bit mode
                .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,               //hardware flow control(cts/rts)
                .rx_flow_ctrl_thresh = 120,                          //flow control threshold
        };
        uart_param_config(uart_num, &uart_config);
        //QueueHandle_t uart_queue;
        if(uart_driver_install(uart_num, 1024 * 2, 1024 * 2, 0, UART_INTR_NUM, NULL) != ESP_OK){
                puts("uart driver install failed");
        }

        uart_set_pin(uart_num, 10, 9, 15, 13);
        uart_set_word_length(uart_num, UART_DATA_8_BITS);
        uart_set_parity(uart_num, UART_PARITY_EVEN);

But when I sent data through WiFi to ESP32:

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                if((recv(client_sock2, &recvbuffer,32,0))>0){
                        uart_write_bytes(uart_num, (const char*) recvbuffer, 32);
                }

And after I checked the oscilloscope on the TX line, I found out that the parity bit is missing.

Anybody has any idea if I did anything wrong?

[ESP_Sprite]

Seems like a small bug in the uart driver. We're working on a fix, should arrive in master somewhere this week.

[shih91]

May I know if the bug has been fixed?? I don't see it in the commits.

[ESP_Sprite]

Was fixed here, sorry for not updating you:
https://github.com/espressif/esp-idf/co ... 402845322f

[shih91]

sweet! thank you so much!