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8 years ago.

3 x serial with Nucleo-F103RB

Hello, I try to use 3 serial port with the Nucleo F103RB:

Serial pc(PA_2,PA_3); USART2

Serial bt(PA_9, PA_10); USART1

Serial osd(PB_10, PB_11); USART3 - Problem!

The ports are defined for serial use (see https://developer.mbed.org/platforms/ST-Nucleo-F103RB/). It works fine if I use only the first 2 serials. If I add the third one, the program does not start. After reset it send a message "pinmap not found for peripheral". What is wrong? I've also tried the alternative pins for the usart3, the same result.

Best Regards , Markus

Edit:

3 Serial s are defined for the Nuleo Board in PeripheralPins.c:

* SERIAL *

const PinMap PinMap_UART_TX[] = { {PA_2, UART_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 0)},

{PA_9, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 0)},

{PB_6, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 3)}, GPIO_Remap_USART1

{PB_10, UART_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 0)},

{PC_10, UART_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 5)}, GPIO_PartialRemap_USART3

{NC, NC, 0} };

const PinMap PinMap_UART_RX[] = { {PA_3, UART_2, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, 0)},

{PA_10, UART_1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, 0)},

{PB_7, UART_1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, 3)}, GPIO_Remap_USART1

{PB_11, UART_3, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, 0)},

{PC_11, UART_3, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLUP, 5)}, GPIO_PartialRemap_USART3

{NC, NC, 0}

};

Question relating to:

Last updated: 20 Apr 2021
Affordable and flexible platform to ease prototyping using a STM32F103RBT6 microcontroller.

1 Answer

Zoltan Hudak
8 years ago.

Hello Markus,
According to the User Manual, Chapter 6.8 - USART communication, USART3 is connected to PC_10 (Serial3TX) and PC_11 (Serial3RX).

The following code forks fine with my NUCLEO-F103RB. No "pinmap not found for peripheral" error is reported after reset. The terminal program running on my PC displays just the coming "Tick" messages:

#include "mbed.h"

DigitalOut  myled(LED1);

Serial bt(PA_9, PA_10);
Serial pc(PA_2, PA_3);
Serial osd(PC_10, PC_11);

int main()
{
    while(1) {
        myled = 1; // LED is ON
        wait(0.2); // 200 ms
        myled = 0; // LED is OFF
        wait(1.0); // 1 sec
        pc.printf("Tick\r\n");
    }
}

Accepted Answer

Hello Zoltan, thank you for the fast response. PC10 and 11 was my first try (I forgot to mention it - sorry) with the same result. To be sure I've testet it again.

Serial pc(PA_2,PA_3); USART2

Serial bt(PA_9, PA_10); USART1

Serial osd(PB_10, PB_11); USART3 - Problem!

Serial osd(PC_10, PC_11); USART3 - Problem, other pins does not change the result.

Still "pinmap not found for peripheral".

posted by m d 17 Apr 2016