Wio Lite RISC-V digitalRead()

Voltaic · June 12, 2020, 8:36pm

Attempting to use my new Wio Lite Risc-V board attached to a DHT-22 temperature/humidity sensor. After importing the library to the blink project (without any code added to the blink application except #include “DHT.h”) the project will not compile and has a red collect2.exe: error: ld returned 1 exit status *** [.pio\build\wio_lite_risc-v\firmware.elf] Error 1 error with a yellow main.cpp:(.text.setup+0x14): undefined reference to digitalRead’` above it.

I am using “DHT by Mark Ruys” specifically.

My platformio.ini:
[env:wio_lite_risc-v]
platform = gd32v
board = gd32vf103v-eval
framework = arduino
upload_protocol = dfu
monitor_speed = 115200
lib_deps =
1671

How do I get the digitalRead() function to work with this?

Baozhu · June 15, 2020, 12:46am

Here is the definition given by digitalRead.

github.com

sipeed/Longduino/blob/master/cores/arduino/wiring_digital.c#L74


    if (LOW != status) {
        //gpio_bit_set(PIN_MAP[pinNumber].gpio_device->gpio_port, PIN_MAP[pinNumber].gpio_bit);
        GPIO_BOP(digitalPinToPort(pinNumber)) = digitalPinToBitMask(pinNumber);
    } else {
       //gpio_bit_reset(PIN_MAP[pinNumber].gpio_device->gpio_port, PIN_MAP[pinNumber].gpio_bit);
        GPIO_BC(digitalPinToPort(pinNumber)) = digitalPinToBitMask(pinNumber);
    }
    return;
}


PinStatus digitalRead(pin_size_t pinNumber)
{
    if (pinNumber >= VARIANT_GPIO_NUM) return LOW;


    if ((uint32_t) LOW != (GPIO_ISTAT(digitalPinToPort(pinNumber)) & digitalPinToBitMask(pinNumber))) {
        return HIGH;
    } else {
        return LOW;
    }
}

Voltaic · June 15, 2020, 12:51am

Thank you so much! That is very different from the content of my wiring_digital.c but now it compiles without issue!

PinStatus digitalRead(pin_map_t ulPin)
// {
//     if ((uint32_t) LOW != (GPIO_ISTAT(pinToPort(ulPin)) & (pinToGpioPin(ulPin)))) {
//         return HIGH;
//     } else {
//         return LOW;
//     }
// }