Arduino for STM32

Posted: **Sat Aug 07, 2021 8:32 pm**

I manually added a stm32f105x based board and I cant seem to get the blink example to complie/upload. I am using an stmlink v2 clone.

the board is a can bus filter found on aliexpress.

variant.h

Code: Select all

/*
 *******************************************************************************
 * Copyright (c) 2019, STMicroelectronics
 * All rights reserved.
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *                        opensource.org/licenses/BSD-3-Clause
 *
 *******************************************************************************
 */

#ifndef ARDUINO_CANFILTER_STM32
#define ARDUINO_CANFILTER_STM32

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus


#define HSE_VALUE 25000000U

//#define STM32F105xC
//#define DWT_DELAY_DISABLED

/*----------------------------------------------------------------------------
 *        Pins
 *----------------------------------------------------------------------------*/

// Define pin names to match digital pin number --> Dx
// It could be used with preprocessor tests (e.g. #if PXn == 3)
// so an enum will not work.
// !!!
// !!! Copy the digitalPin[] array from the variant.cpp
// !!! and remove all '_': PX_n --> PXn
// !!! For NC, comment the line to warn x pin number is NC
// !!! // x is NC
// !!! For duplicated pin name, comment the line to warn x pin number
// !!! is PXn which is already defined with y pin number
// !!! // x is PXn (y)
// !!! Ex:
// !!! ...
// !!! #define PA4  20 // A14 <-- if NUM_ANALOG_FIRST not defined
// !!! or
// !!! #define PA4  A14 // 20 <-- if NUM_ANALOG_FIRST defined
// !!! #define PB4  21
// !!! #define PB5  22
// !!! #define PB3  23
// !!! // 24 is PA4 (20)
// !!! // 25 is PB4 (21)
// !!! #define PA2  26 // A15 <-- if NUM_ANALOG_FIRST not defined
// !!! or
// !!! #define PA2  A15 // 26 <-- if NUM_ANALOG_FIRST defined
// !!! ...
//#define PXn x

#define  PA15  0
#define  PC10  1
#define  PC11  2
#define  PC12  3

// This must be a literal
// It is used with preprocessor tests (e.g. #if NUM_DIGITAL_PINS > 3)
// so an enum will not work.
#define NUM_DIGITAL_PINS        3

// Allow to define Arduino style alias for analog input pin number --> Ax
// If no analog pin required then NUM_ANALOG_INPUTS could not be defined
// or set to `0`
// All pins are digital, analog inputs are a subset of digital pins.
// This must be a literal
// It is used with preprocessor tests (e.g. #if NUM_ANALOG_INPUTS > 3)
// so an enum will not work.
// !!!
// !!! It must be aligned with the number of analog PinName
// !!! defined in digitalPin[] array in variant.cpp
// !!!
#define NUM_ANALOG_INPUTS       0

// They are 2 possibles way to define analog pins:
//-------------------------------------------------------------------------------------------
//   - If they are contiguous in the digitalPin array:
//     Simply defined `NUM_ANALOG_FIRST` and all pins Ax will be automatically defined.
//     It define the digital pin number of the first analog input  (i.e. which digital pin is A0)
//     First analog pin value (A0) must be greater than or equal to NUM_ANALOG_INPUTS
//     This must be a literal with a value less than or equal to MAX_ANALOG_INPUTS
//     defined in pin_arduino.h
#define NUM_ANALOG_FIRST        0
//------------------------------------OR------------------------------------------------------
//   - If they are not contiguous in the digitalPin array:
//     Add an analogInputPin array in the variant.cpp without defining NUM_ANALOG_FIRST
//     In that case the defined PYn for analog pin have to define the Ax definition instead of
//     index in digitalPin[] array:
//     #define PA4  A14
//-------------------------------------------------------------------------------------------


// Below ADC and PWM definitions already done in the core
// Could be redefined here if needed
// ADC resolution is 10 bits
//#define ADC_RESOLUTION          10

// PWM resolution
//#define PWM_RESOLUTION          8
//#define PWM_FREQUENCY           1000
//#define PWM_MAX_DUTY_CYCLE      255

// On-board LED pin number
#define LED_BUILTIN             PC10
#define LED_GREEN               LED_GREEN

// On-board user button
#define USER_BTN                0

// Below SPI and I2C definitions already done in the core
// Could be redefined here if differs from the default one
// SPI Definitions
//#define PIN_SPI_SS              10 // Default for Arduino connector compatibility
//#define PIN_SPI_MOSI            11 // Default for Arduino connector compatibility
//#define PIN_SPI_MISO            12 // Default for Arduino connector compatibility
//#define PIN_SPI_SCK             13 // Default for Arduino connector compatibility

// I2C Definitions
//#define PIN_WIRE_SDA            14 // Default for Arduino connector compatibility
//#define PIN_WIRE_SCL            15 // Default for Arduino connector compatibility

// I2C timing definitions (optional), avoid time spent to compute if defined
// * I2C_TIMING_SM for Standard Mode (100kHz)
// * I2C_TIMING_FM for Fast Mode (400kHz)
// * I2C_TIMING_FMP for Fast Mode Plus (1000kHz)
//#define I2C_TIMING_SM           0x00000000
//#define I2C_TIMING_FM           0x00000000
//#define I2C_TIMING_FMP          0x00000000

// Timer Definitions (optional)
// Use TIM6/TIM7 when possible as servo and tone don't need GPIO output pin
#define TIMER_TONE              TIM6
#define TIMER_SERVO             TIM7

// UART Definitions
// Define here Serial instance number to map on Serial generic name
#define SERIAL_UART_INSTANCE    0 //ex: 2 for Serial2 (USART2)
// DEBUG_UART could be redefined to print on another instance than 'Serial'
//#define DEBUG_UART              ((USART_TypeDef *) U(S)ARTX) // ex: USART3
// DEBUG_UART baudrate, default: 9600 if not defined
//#define DEBUG_UART_BAUDRATE     x
// DEBUG_UART Tx pin name, default: the first one found in PinMap_UART_TX for DEBUG_UART
//#define DEBUG_PINNAME_TX        PX_n // PinName used for TX

// Default pin used for 'Serial' instance (ex: ST-Link)
// Mandatory for Firmata
#define PIN_SERIAL_RX           x
#define PIN_SERIAL_TX           x

// Optional PIN_SERIALn_RX and PIN_SERIALn_TX where 'n' is the U(S)ART number
// Used when user instanciate a hardware Serial using its peripheral name.
// Example: HardwareSerial mySerial(USART3);
// will use PIN_SERIAL3_RX and PIN_SERIAL3_TX if defined.
//#define PIN_SERIALn_RX          x // For U(S)ARTn RX
//#define PIN_SERIALn_TX          x // For U(S)ARTn TX
//#define PIN_SERIALLP1_RX        x // For LPUART1 RX
//#define PIN_SERIALLP1_TX        x // For LPUART1 TX

// SD card slot Definitions
// SD detect signal can be defined if required
//#define SD_DETECT_PIN           x
// SD Read/Write timeout, default value defined in STM32SD library
//#define SD_DATATIMEOUT          x

#ifdef __cplusplus
} // extern "C"
#endif
/*----------------------------------------------------------------------------
 *        Arduino objects - C++ only
 *----------------------------------------------------------------------------*/

#ifdef __cplusplus
// These serial port names are intended to allow libraries and architecture-neutral
// sketches to automatically default to the correct port name for a particular type
// of use.  For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
// the first hardware serial port whose RX/TX pins are not dedicated to another use.
//
// SERIAL_PORT_MONITOR        Port which normally prints to the Arduino Serial Monitor
//
// SERIAL_PORT_USBVIRTUAL     Port which is USB virtual serial
//
// SERIAL_PORT_LINUXBRIDGE    Port which connects to a Linux system via Bridge library
//
// SERIAL_PORT_HARDWARE       Hardware serial port, physical RX & TX pins.
//
// SERIAL_PORT_HARDWARE_OPEN  Hardware serial ports which are open for use.  Their RX & TX
//                            pins are NOT connected to anything by default.
#define SERIAL_PORT_MONITOR     Serial
#define SERIAL_PORT_HARDWARE    Serial
#endif

#endif /* _VARIANT_ARDUINO_STM32_ */

variant.cpp

Code: Select all

/*
 *******************************************************************************
 * Copyright (c) 2019, STMicroelectronics
 * All rights reserved.
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 *                        opensource.org/licenses/BSD-3-Clause
 *
 *******************************************************************************
 */

#include "pins_arduino.h"

#ifdef __cplusplus
extern "C" {
#endif

// Digital PinName array
// This array allows to wrap Arduino pin number(Dx or x)
// to STM32 PinName (PX_n)
const PinName digitalPin[] = {
    //PX_n, //Dx
    PA_15, //D0
    PC_10, //D1
    PC_11, //D2
    PC_12 //D3
};

#ifdef __cplusplus
}
#endif

// ----------------------------------------------------------------------------

#ifdef __cplusplus
extern "C" {
#endif


/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    /** Initializes the CPU, AHB and APB busses clocks
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV5;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.Prediv1Source = RCC_PREDIV1_SOURCE_PLL2;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    RCC_OscInitStruct.PLL2.PLL2State = RCC_PLL2_ON;
    RCC_OscInitStruct.PLL2.PLL2MUL = RCC_PLL2_MUL8;
    RCC_OscInitStruct.PLL2.HSEPrediv2Value = RCC_HSE_PREDIV2_DIV5;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
    /** Initializes the CPU, AHB and APB busses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                                  |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        Error_Handler();
    }
    /** Configure the Systick interrupt time
    */
    __HAL_RCC_PLLI2S_ENABLE();
}

#ifdef __cplusplus
}
#endif

when i load up the blink example it complains that 'LED_BUILTIN' was not declared in this scope but when i explicitly define it in the sketch as PC_10 or '1', I receive:

Code: Select all

/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c: In function 'pinNametoDigitalPin':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c:27:16: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
   27 |   uint32_t i = NUM_DIGITAL_PINS;
      |                ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c:27:16: note: each undeclared identifier is reported only once for each function it appears in
In file included from /Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c:19:
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c: In function 'analogInputToPinName':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:119:38: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  119 | #define analogInputToDigitalPin(p)  (NUM_DIGITAL_PINS)
      |                                      ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:51: note: in definition of macro 'digitalPinToPinName'
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                   ^
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.c:41:36: note: in expansion of macro 'analogInputToDigitalPin'
   41 |   PinName pn = digitalPinToPinName(analogInputToDigitalPin(pin));
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~
In file included from /Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/Arduino.h:56,
                 from /Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:19:
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c: In function 'pinMode':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:31:15: note: in expansion of macro 'digitalPinToPinName'
   31 |   PinName p = digitalPinToPinName(ulPin);
      |               ^~~~~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: note: each undeclared identifier is reported only once for each function it appears in
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:31:15: note: in expansion of macro 'digitalPinToPinName'
   31 |   PinName p = digitalPinToPinName(ulPin);
      |               ^~~~~~~~~~~~~~~~~~~
In file included from /Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/Arduino.h:56,
                 from /Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_analog.c:19:
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_analog.c: In function 'analogWrite':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_analog.c:187:15: note: in expansion of macro 'digitalPinToPinName'
  187 |   PinName p = digitalPinToPinName(ulPin);
      |               ^~~~~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: note: each undeclared identifier is reported only once for each function it appears in
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_analog.c:187:15: note: in expansion of macro 'digitalPinToPinName'
  187 |   PinName p = digitalPinToPinName(ulPin);
      |               ^~~~~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c: In function 'digitalWrite':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:81:20: note: in expansion of macro 'digitalPinToPinName'
   81 |   digitalWriteFast(digitalPinToPinName(ulPin), ulVal);
      |                    ^~~~~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c: In function 'digitalRead':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:86:26: note: in expansion of macro 'digitalPinToPinName'
   86 |   return digitalReadFast(digitalPinToPinName(ulPin));
      |                          ^~~~~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c: In function 'digitalToggle':
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/pins_arduino.h:103:69: error: 'NUM_DIGITAL_PINS' undeclared (first use in this function)
  103 | #define digitalPinToPinName(p)      ((((uint32_t)(p) & PNUM_MASK) < NUM_DIGITAL_PINS) ? \
      |                                                                     ^~~~~~~~~~~~~~~~
/Users/marric.murray/Library/Arduino15/packages/STMicroelectronics/hardware/stm32/2.0.0/cores/arduino/wiring_digital.c:91:21: note: in expansion of macro 'digitalPinToPinName'
   91 |   digitalToggleFast(digitalPinToPinName(ulPin));
      |                     ^~~~~~~~~~~~~~~~~~~
exit status 1
Error compiling for board Generic STM32F1 series.

what am I missing here?

i found a schematic for the board on https://dangerouspayload.com/2020/03/10 ... er-device/

Posted: **Mon Aug 09, 2021 7:42 am**

Hi @RCP1990,
As you defined NUM_DIGITAL_PINS in variant.h, I can guess that:
* either your variant.h is not included at all (maybe another variant.h file is included, not yours)
* or you didn't defined ARDUINO_CANFILTER_STM32 (which prevent definition ofNUM_DIGITAL_PINS )
this is the name of board in boards.txt.

In both cases I think the problem is in boards.txt.

Did you follow this wiki to create your custom board ?
https://github.com/stm32duino/wiki/wiki ... nt-(board)
did you follow step : "4 - Declare the variant" ?
Can you share the board.txt part you added ?

Posted: **Tue Aug 10, 2021 6:31 pm**

thanks for the reply!

here is my boards.txt excerpt:

Code: Select all

# CAN_FILTER
GenF1.menu.pnum.CANFILTER=CAN Filter
GenF1.menu.pnum.CANFILTER.upload.maximum_size=131072
GenF1.menu.pnum.CANFILTER.upload.maximum_data_size=65536
GenF1.menu.pnum.CANFILTER.build.board=CANFILTER
GenF1.menu.pnum.CANFILTER.build.product_line=STM32F105xC
GenF1.menu.pnum.CANFILTER.build.variant=STM32F1xx/CAN_FILTER
GenF1.menu.pnum.CANFILTER.build.variant_h=variant.h
GenF1.menu.pnum.CANFILTER.build.mcu=cortex-m3
GenF1.menu.pnum.CANFILTER.build.cmsis_lib_gcc=arm_cortexM3l_math
GenF1.menu.pnum.CANFILTER.build.series=STM32F1xx

likewise my file directory is:
variants/STM32F1xx/CAN_FILTER:
PeripheralPins.c boards_entry.txt variant.cpp
PinNamesVar.h ldscript.ld variant.h

Posted: **Tue Aug 10, 2021 6:47 pm**

Your issue is that you used variant.h name. It already exists in the core. Rename it and change it in the boards.txt.

Arduino for STM32

cant get blink to work with variant

cant get blink to work with variant

Re: cant get blink to work with variant

Re: cant get blink to work with variant

Re: cant get blink to work with variant