stm32 blue pill not reporting analog pins

[ale-novo]

Hello, i have a stm32 blue pill, when connecting its not reporting any analog pins however the pinout shows there are several analog pins. my firmata sketch includes analog with #define ENABLE_ANALOG

2023-04-01 21:00:13,003 [INFO ] Connected to USB board devkit_io_serial, baudrate 115200
2023-04-01 21:00:13,607 [INFO ] ConfigurableFirmata: V_3_00, FirmataProtocol: V_2_06, SketchName: ConfigurableFirmata
2023-04-01 21:00:13,608 [INFO ] Input pins board devkit_io_serial: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]
2023-04-01 21:00:13,608 [INFO ] Output pins board devkit_io_serial: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]
2023-04-01 21:00:13,608 [INFO ] Analog pins board devkit_io_serial: []
2023-04-01 21:00:13,608 [INFO ] Pullup pins board devkit_io_serial: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]
2023-04-01 21:00:13,608 [INFO ] Stepper pins board devkit_io_serial: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34]
2023-04-01 21:00:13,608 [INFO ] Encoder pins board devkit_io_serial: []
2023-04-01 21:00:13,608 [INFO ] Servo pins board devkit_io_serial: []
2023-04-01 21:00:13,608 [INFO ] Pwm pins board devkit_io_serial: [0, 1, 2, 3, 4, 5, 6, 7, 9, 12, 13, 14, 15, 20, 21, 22, 23, 26, 27, 28, 29, 30, 31]
2023-04-01 21:00:13,609 [INFO ] Firmata device connected True board devkit_io_serial

im looking at boards.h and seems there is consideration for analog. is there anything wrong with that configuration? cheers.

[pgrawehr]

Not easy to know without looking at the board toolkit.

I would however guess that

#define TOTAL_PINS              NUM_DIGITAL_PINS

is probably wrong. This should probably be

#define TOTAL_PINS              NUM_DIGITAL_PINS + NUM_ANALOG_INPUTS

for this board. But to be sure, I would need to know what the value of A0 is and whether the digital pins include the analog ones on this board or not. Most boards can use the analog inputs also as digital pins, but maybe not this one.

[ale-novo]

Hi, thanks for your response. i also noted that the stm32 blue pill pins do not match a logical order in firmata. The stm32 blue pill pins are separated in 3 ports, port a, port b and port c. i had to test one by one and found these are the pins:

firmata pin	stm32 port
0	b9
1	b8
2	b7
3	b6
4	b5
5	b4
6	b3
7	a15
12	a8
13	b15
14	b14
15	b13
16	b12
17	c13 LED
18	c14
19	c15
20	a0
21	a1
22	a2
23	a3
24	a4
25	a5
26	a6
27	a7
28	b0
29	b1
30	b10
31	b11

Analog pins should be:

Analog Pins: PA0-PA7, PB0-PB1

pinout for reference: https://components101.com/sites/default/files/component_pin/STM32-Blue-Pill-Development-Board-Pinout.jpg

[pgrawehr]

I can't see directly what's wrong then. The analog pins are within the digital pin range, so they should be reported correctly.

I'm assuming you got a wrong pinout diagram there. The development boards for these chips are (unlike with Arduinos) not standardized, so different vendors could make different layouts.

[ale-novo]

Hi, the table ive posted before ive constructed myself from testing one pin at a time, so its the right one however configurable firmata is reporting that the board has no analog capable pins