Rx not functioning

[mwolfeu]

I am on the latest SDK (pfalcon/esp-open-sdk) All lines with "PIN_PULLDWN_DIS" are commented out since the new SDK removed it. (apparently there was a question of whether the ESP even had pulldowns) compiled fine Tx works fine Rx fails

I instrumented user_main.c a bit but I don't see anything that is obviously wrong.

user_main.c

#include "softuart.h"

#define user_procTaskPrio        0
#define user_procTaskQueueLen    1
os_event_t    user_procTaskQueue[user_procTaskQueueLen];

//create global softuart instances
Softuart softuart;
Softuart softuart2;
//-------------------------------------------------------------------------------------------------
// loop function will be execute by "os" periodically
static void ICACHE_FLASH_ATTR  loop(os_event_t *events)
{
    char buffer_char;

    //print something on uart_0 to see progress
    os_printf(".");

    if (Softuart_Available(&softuart)) {
      buffer_char = Softuart_Read(&softuart);  
      if (softuart.buffer.receive_buffer_head == softuart.buffer.receive_buffer_tail)
            os_printf("Buffer empty\n");
          else
            os_printf("Buffer idx: %d %d\n", softuart.buffer.receive_buffer_head, softuart.buffer.receive_buffer_tail);

          os_printf("Softuart 1 Rx: %d\r\n", buffer_char);
          //Softuart_Putchar(&softuart,buffer_char);
    }

    //write example output to softuart 1
    Softuart_Putchar(&softuart,'1');

    //some delay until we run this task again
        os_delay_us(100000);

    // run (schedule) this loop task again 
        system_os_post(user_procTaskPrio, 0, 0 );
}

//-------------------------------------------------------------------------------------------------
//Init function
void ICACHE_FLASH_ATTR  user_init()
{
    // Initialize UART0 to use as debug
        uart_div_modify(0, UART_CLK_FREQ / 9600);
        os_delay_us(100000);

    //init software uart
    Softuart_SetPinRx(&softuart,12);    
    Softuart_SetPinTx(&softuart,14);

    //startup
    Softuart_Init(&softuart,9600);

    //Start our loop task
    system_os_task(loop, user_procTaskPrio,user_procTaskQueue, user_procTaskQueueLen);
    system_os_post(user_procTaskPrio, 0, 0 );
}

This is the output: Several contiguous dots = my loopback wire not attached otherwise when it prints, it was attached I noticed also each run of the loop seemed to put >1 chars into the Rx buffer. Is the a timing issue? New SDK issue?

�tX�BEx��z���I$b[�8��YHMC���SOFTUART initialize gpio
SOFTUART bit_time is 104
SOFTUART RX INIT DONE
SOFTUART TX INIT DONE
SOFTUART INIT DONE
mode : sta(xx:xx:xx:xx:xx:xx)
add if0
f 0, ..........................................scandone
.reconnect
f 0, ..........................................scandone
.reconnect
f -240, .Buffer idx: 1 3
Softuart 1 Rx: 0
.Buffer idx: 2 6
Softuart 1 Rx: 0
.Buffer idx: 3 9
Softuart 1 Rx: 0
.Buffer idx: 4 12
Softuart 1 Rx: 0
.Buffer idx: 5 15
Softuart 1 Rx: 0
.Buffer idx: 6 18
Softuart 1 Rx: 0
.Buffer idx: 7 21
Softuart 1 Rx: 0
.Buffer idx: 8 24
Softuart 1 Rx: 0
.Buffer idx: 9 27
Softuart 1 Rx: 0
.Buffer idx: 10 30
Softuart 1 Rx: 0
.Buffer idx: 11 33
Softuart 1 Rx: 0
.Buffer idx: 12 36
Softuart 1 Rx: 0
.Buffer idx: 13 39
Softuart 1 Rx: 0
.Buffer idx: 14 42
Softuart 1 Rx: 0
.Buffer idx: 15 45
Softuart 1 Rx: 0
.Buffer idx: 16 48
Softuart 1 Rx: 0
.Buffer idx: 17 51
Softuart 1 Rx: 0
.Buffer idx: 18 54
Softuart 1 Rx: 0
.Buffer idx: 19 57
Softuart 1 Rx: 0
.Buffer idx: 20 60
Softuart 1 Rx: 0
.Buffer idx: 21 63
Softuart 1 Rx: 0
.Buffer idx: 22 2
Softuart 1 Rx: 0
.Buffer idx: 23 5
Softuart 1 Rx: 0
.Buffer idx: 24 8
Softuart 1 Rx: 0
.Buffer idx: 25 11
Softuart 1 Rx: 0
.Buffer idx: 26 14
Softuart 1 Rx: 0
.Buffer idx: 27 17
Softuart 1 Rx: 0
.Buffer idx: 28 20
Softuart 1 Rx: 0
.Buffer idx: 29 23
Softuart 1 Rx: 0
.Buffer idx: 30 26
Softuart 1 Rx: 0
.Buffer idx: 31 29
Softuart 1 Rx: 0
.Buffer idx: 32 30
Softuart 1 Rx: 0
.Buffer idx: 33 31
Softuart 1 Rx: 0
.Buffer idx: 34 32
Softuart 1 Rx: 0
.Buffer idx: 35 32
Softuart 1 Rx: 0
.Buffer idx: 36 32
Softuart 1 Rx: 0
.Buffer idx: 37 32
Softuart 1 Rx: 0
.Buffer idx: 38 32
Softuart 1 Rx: 0
.Buffer idx: 39 32
Softuart 1 Rx: 0
.Buffer idx: 40 32
Softuart 1 Rx: 0
.Buffer idx: 41 32
Softuart 1 Rx: 0
.Buffer idx: 42 32
Softuart 1 Rx: 0
scandone
.Buffer idx: 43 32
Softuart 1 Rx: 0
reconnect
f 0, .Buffer idx: 44 32
Softuart 1 Rx: 0
.Buffer idx: 45 32
Softuart 1 Rx: 0
.Buffer idx: 46 32
Softuart 1 Rx: 0
.Buffer idx: 47 32
Softuart 1 Rx: 0
.Buffer idx: 48 32
Softuart 1 Rx: 0
.Buffer idx: 49 32
Softuart 1 Rx: 0
.Buffer idx: 50 32
Softuart 1 Rx: 0
.Buffer idx: 51 32
Softuart 1 Rx: 0
.Buffer idx: 52 32
Softuart 1 Rx: 0
.Buffer idx: 53 32
Softuart 1 Rx: 0
.Buffer idx: 54 32
Softuart 1 Rx: 0
.Buffer idx: 55 32
Softuart 1 Rx: 0
.Buffer idx: 56 32
Softuart 1 Rx: 0
.Buffer idx: 57 32
Softuart 1 Rx: 0
.Buffer idx: 58 32
Softuart 1 Rx: 0
.Buffer idx: 59 32
Softuart 1 Rx: 0
.Buffer idx: 60 32
Softuart 1 Rx: 0
.Buffer idx: 61 32
Softuart 1 Rx: 0
.Buffer idx: 62 32
Softuart 1 Rx: 0
.Buffer idx: 63 32
Softuart 1 Rx: 0
.Buffer idx: 0 32
Softuart 1 Rx: 0
.Buffer idx: 1 32
Softuart 1 Rx: 0
.Buffer idx: 2 32
Softuart 1 Rx: 0
.Buffer idx: 3 32
Softuart 1 Rx: 0
.Buffer idx: 4 32
Softuart 1 Rx: 0
.Buffer idx: 5 32
Softuart 1 Rx: 0
.Buffer idx: 6 32
Softuart 1 Rx: 0
.Buffer idx: 7 32
Softuart 1 Rx: 0
.Buffer idx: 8 32
Softuart 1 Rx: 0
.Buffer idx: 9 32
Softuart 1 Rx: 0
.Buffer idx: 10 32
Softuart 1 Rx: 0
.Buffer idx: 11 32
Softuart 1 Rx: 0
.Buffer idx: 12 32
Softuart 1 Rx: 0
.Buffer idx: 13 32
Softuart 1 Rx: 0
.Buffer idx: 14 32
Softuart 1 Rx: 0
.Buffer idx: 15 32
Softuart 1 Rx: 0
.Buffer idx: 16 32
Softuart 1 Rx: 0
.Buffer idx: 17 32
Softuart 1 Rx: 0
.Buffer idx: 18 32
Softuart 1 Rx: 0
.Buffer idx: 19 32
Softuart 1 Rx: 0
.Buffer idx: 20 32
Softuart 1 Rx: 0
.Buffer idx: 21 32
Softuart 1 Rx: 0
scandone
.Buffer idx: 22 32
Softuart 1 Rx: 0
reconnect
f -240, .Buffer idx: 23 32
Softuart 1 Rx: 0
.Buffer idx: 24 32
Softuart 1 Rx: 0
.Buffer idx: 25 32
Softuart 1 Rx: 0
.Buffer idx: 26 32
Softuart 1 Rx: 0
.Buffer idx: 27 32
Softuart 1 Rx: 0
.Buffer idx: 28 32
Softuart 1 Rx: 0
.Buffer idx: 29 32
Softuart 1 Rx: 0
.Buffer idx: 30 32
Softuart 1 Rx: 0
.Buffer idx: 31 32
Softuart 1 Rx: 0
.Buffer empty
Softuart 1 Rx: 0
................................scandone
.reconnect
f 0, .....................................

Thanks in advance mwolf

[plieningerweb]

Hey @mwolfeu ,

thanks for your issue report. I have some more questions: -How did you wire up your esp? -From where did you send data to your esp rx?

Hopefully with this information I will be able to reproduce the issue. Thanks!

[mwolfeu]

It is on a breakout board similar to this: http://g04.a.alicdn.com/kf/HTB19bIBHVXXXXbdXFXXq6xXFXXXj/ESP8266-ESP-12-Serial-WIFI-Module-Industrial-Stable-Version-Test-Board-Full-IO-Leads.jpg

I used a loopback so the data came from pin 14 -> pin 12. Other than the loopback wire, I have not connected anything else.

When connected to an external UART both Tx and Rx seem to work well.

thanks, mwolf

[mwolfeu]

I just did some more testing with the external usb uart. At 38400 soft uart Rx seems solid.
Making two soft uarts (where Rx of one goes into Tx of the other) didn't help.

I would think the goofy LEDs on my board might be screwing with the send/receive but if it makes any difference, I just tested them with a multimeter and got 3.26v.

[plieningerweb]

@mwolfeu

I am sorry to let you know that "looback" does not work. Sending data form one tx to another software rx was never able with this library.

I am even not sure, if other libraries, e.g. Arduino SoftwareSerial, can do this.

Sorry that this was not clear form the beginning. Are there any other issues? If not, I will close this one

[mwolfeu]

okay, I misunderstood your previous two software uart example. I thought it suggested loopback was possible. You are right about the Arduino. As I understand it, it polls the GPIO with interrupts off, so nothing else can happen during this time. You can close this issue. Thanks again for the code!