Symbols not found in PeriphreralPins.c in custom target using STM32_gen_PeripheralPins.py

Mbed OS
1

Hello all, I have created a custom target (STM32F103VDT) using STM32_gen_PeripheralPins.py. In the generated PeriphreralPins.c are some definitions that can not be found in Mbed Studio (compiler error), the AFIO_TIMx_ENABLE and others, I had to comment the related entries (last lines) to be able to compile, but in my application I need to use pins PD_12 to PD_15 as pwms, see what I did:

MBED_WEAK const PinMap PinMap_PWM[] = {
    {PA_0,       PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM2_CH1
//  {PA_0,       PWM_5,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM5_CH1
    {PA_1,       PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM2_CH2
//  {PA_1,       PWM_5,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM5_CH2
    {PA_2,       PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM2_CH3
//  {PA_2,       PWM_5,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM5_CH3
    {PA_3,       PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM2_CH4
//  {PA_3,       PWM_5,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM5_CH4
    {PA_6,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM3_CH1
    {PA_7,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 6, 1, 1)}, // TIM1_CH1N
    {PA_7_ALT0,  PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM3_CH2
    {PA_7_ALT1,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 1)}, // TIM8_CH1N
    {PA_8,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM1_CH1
    {PA_9,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM1_CH2
    {PA_10,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM1_CH3
    {PA_11,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM1_CH4
    {PA_15,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 8, 1, 0)}, // TIM2_CH1
    {PB_0,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 6, 2, 1)}, // TIM1_CH2N
    {PB_0_ALT0,  PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM3_CH3
    {PB_0_ALT1,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 1)}, // TIM8_CH2N
    {PB_1,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 6, 3, 1)}, // TIM1_CH3N
    {PB_1_ALT0,  PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM3_CH4
    {PB_1_ALT1,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 1)}, // TIM8_CH3N
    {PB_3,       PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 8, 2, 0)}, // TIM2_CH2
    {PB_4,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 7, 1, 0)}, // TIM3_CH1
    {PB_5,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 7, 2, 0)}, // TIM3_CH2
    {PB_6,       PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM4_CH1
    {PB_7,       PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM4_CH2
    {PB_8,       PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM4_CH3
    {PB_9,       PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM4_CH4
    {PB_10,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 8, 3, 0)}, // TIM2_CH3
    {PB_11,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 8, 4, 0)}, // TIM2_CH4
    {PB_13,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 1)}, // TIM1_CH1N
    {PB_14,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 1)}, // TIM1_CH2N
    {PB_15,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 1)}, // TIM1_CH3N
    {PC_6,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 9, 1, 0)}, // TIM3_CH1
    {PC_6_ALT0,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 1, 0)}, // TIM8_CH1
    {PC_7,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 9, 2, 0)}, // TIM3_CH2
    {PC_7_ALT0,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 2, 0)}, // TIM8_CH2
    {PC_8,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 9, 3, 0)}, // TIM3_CH3
    {PC_8_ALT0,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 3, 0)}, // TIM8_CH3
    {PC_9,       PWM_3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 9, 4, 0)}, // TIM3_CH4
    {PC_9_ALT0,  PWM_8,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, 0, 4, 0)}, // TIM8_CH4
    //{PD_12,      PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM4_ENABLE, 1, 0)}, // TIM4_CH1
    //{PD_13,      PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM4_ENABLE, 2, 0)}, // TIM4_CH2
    //{PD_14,      PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM4_ENABLE, 3, 0)}, // TIM4_CH3
    //{PD_15,      PWM_4,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM4_ENABLE, 4, 0)}, // TIM4_CH4
    //{PE_8,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 1, 1)}, // TIM1_CH1N
    //{PE_9,       PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 1, 0)}, // TIM1_CH1
    //{PE_10,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 2, 1)}, // TIM1_CH2N
    //{PE_11,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 2, 0)}, // TIM1_CH2
    //{PE_12,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 3, 1)}, // TIM1_CH3N
    //{PE_13,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 3, 0)}, // TIM1_CH3
    //{PE_14,      PWM_1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_NOPULL, AFIO_TIM1_ENABLE, 4, 0)}, // TIM1_CH4
    {NC, NC, 0}
};

Do you think I missed something?, where those defines ( AFIO_TIMx_ENABLE) should be located?
Thank you very much.

2

PD_12 and PD_15 are connected to TIM4, but TIM4 is reserved for a ticker under Mbed for whole STM32F1 family.

BR, Jan

3

Good point thank you, I guess I could change that timer but the problem still there. What about the AFIO_TIM1_ENABLE symbol?, I just put the example regarding the PinMap_PWM array but this issue appears in other arrays in PeripheralPins.c (ex in uart, can , I put here a snip, the commented lines are the offenders). Why the STM32_gen_PeripheralPins.py is generating symbols that are not recognized?

MBED_WEAK 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)},
    {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)},
    {PC_10_ALT0, UART_4,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 0)},
    {PC_12,      UART_5,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, 0)},
    //{PD_5,       UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART2_ENABLE)},
    //{PD_8,       UART_3,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, AFIO_USART3_ENABLE)},
    {NC, NC, 0}
};

MBED_WEAK const PinMap PinMap_CAN_RD[] = {
    {PA_11,      CAN_1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)},
    {PB_8,       CAN_1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 10)},
    //{PD_0,       CAN_1, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, AFIO_CAN1_3)},
    {NC, NC, 0}
};

Thank you very much

4

I found macros like this one only in repo of ArduinoCoreSTM32, there is an enum. But if you look to any other targets, then you will see these macros are not used anywhere. So from my point of view you need to change these macros to coresponding number.

We can try to ask Autor/Maintainer of this script.

Hello @jeromecoutant, could you explain us why STM32_gen_PeripheralPins.py ganerates AFIO_TIM1_ENABLE macro when they are nowhere in the source please?

BR, Jan

5

Good idea , maybe Jerome could unravel the mystery.
I will follow your suggestion to identify the appropiate numbers.
Thank you very much

Miguel Angel

6

The problem regarding the missing symbols is solved. In the stm32customtargets repository, under the GENERIC_TARGET branch there is the updated PeripheralPins.c with correct definitions. I could check the functionality related with the previous bad definitions, now corrected, and works as expected. The only thing is not working is the PWMs that I need in my app (PD_12,13,14,15 PWM_4 with timer4). I’ve tryed to change us_ticker as per Jan Kamidra suggestion from TIM4 to TIM5 (I halve also tryed TIM 2) and no pwm is generated at any of the mentioned pins. Here you are what I have changed in us_ticker_data.h:

#include "stm32f1xx.h"
#include "stm32f1xx_ll_tim.h"
#include "cmsis_nvic.h"

/*
#define TIM_MST      TIM4
#define TIM_MST_IRQ  TIM4_IRQn
#define TIM_MST_RCC  __HAL_RCC_TIM4_CLK_ENABLE()
#define TIM_MST_DBGMCU_FREEZE  __HAL_DBGMCU_FREEZE_TIM4()

#define TIM_MST_RESET_ON   __HAL_RCC_TIM4_FORCE_RESET()
#define TIM_MST_RESET_OFF  __HAL_RCC_TIM4_RELEASE_RESET()

*/
#define TIM_MST      TIM5
#define TIM_MST_IRQ  TIM5_IRQn
#define TIM_MST_RCC  __HAL_RCC_TIM5_CLK_ENABLE()
#define TIM_MST_DBGMCU_FREEZE  __HAL_DBGMCU_FREEZE_TIM5()

#define TIM_MST_RESET_ON   __HAL_RCC_TIM5_FORCE_RESET()
#define TIM_MST_RESET_OFF  __HAL_RCC_TIM5_RELEASE_RESET()

#define TIM_MST_BIT_WIDTH  16 // 16 or 32

#define TIM_MST_PCLK  1 // Select the peripheral clock number (1 or 2)

Do I miss something?, maybe I need to do something more to free TIM4 for PWM?

Thank you very much

Regards

Miguel Angel