pins marked as GPIO + DAC + ADC can be used in the same ways as known from any other arduino environments.

KLST_TINY--schematics--pin-map

on the KLST_TINY board there are two sections of 2×10 pin rows ( marked 05–08 + 11–14 on the schematic drawing ) incorporating in addition to GPIO + DAC + ADC several additional peripherals like SERIAL, I2C, SPI, audio in- + output and power supply1.

GPIO pins

Klangstrom provides 8 GPIO pins, named GPIO_00 to GPIO_07. these pins can be used as digital in- and outputs via the known arduino idiom digitalRead() + digitalWrite():

pinMode(GPIO_00, OUTPUT);
digitalWrite(GPIO_00, HIGH);

pinMode(GPIO_01, INPUT);
int mState = digitalRead(GPIO_01);

note that all pins markes as ADC, DAC, SERIAL, I2C, and SPI can also be used as GPIO pins if need be2.

the table below shows all available GPIO pin with 3 different naming conventions for the same physical pins:

KLST STM32 ARDUINO
GPIO_00 PC13 D23
GPIO_01 PC14 D24
GPIO_02 PC15 D25
GPIO_03 PC2 D28
GPIO_04 PC3 D29
GPIO_05 PA2 D1
GPIO_06 PA3 D0
GPIO_07 PC5 D35

ADC + DAC pins

Klangstrom provides 2 analog input ( named ADC_00 + ADC_01 ) and 2 analog output ( named DAC_00 + DAC_01 ) pins. these pins can be used as analog in- and outputs via the known arduino idiom analogRead() + analogWrite():

int mValue = analogRead(ADC_00);

pinMode(DAC_00, OUTPUT);
analogWrite(DAC_00, mValue);

note that 5 of the GPIO pins can also be used ADC pins.

the table below shows all available ADC capable pins with 3 different naming conventions for the same physical pins:

KLST STM32 ARDUINO
ADC_00 PB0 A3
ADC_01 PB1 A12
     
GPIO_03 PC2 A9
GPIO_04 PC3 A10
GPIO_07 PC5 A11
GPIO_05 PA2 D1*
GPIO_06 PA3 D0*

*) not tested

note that non of the GPIO pins can be used as an additional DAC. the board is limited to just the two.

  1. note, that due to the nature of the KLST_TINY MCU ( STM32F446RET ) most pins can be configured to have multiple functions e.g some GPIO pin can act as ADC pins, while other can also act as serial ports or I2C interfaces. consult the STM32F446RET manual for further information of pin functionalities. ↩

  2. technically ↩