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sys/arduino: add assertion to gpio handling

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Not all boards that provide a Arduino pin layout break out all GPIOs. A good example are Adafruit `feather-m0` boards. GPIOs that are not broken out have to be defined as `GPIO_UNDEF` to preserve the Arduino pin layout. However, GPIO functions lead to a complete system lock on `feather-m0` boards if a pin is used that is defined as `GPIO_UNDEF`. Therefore, at least an assert should blow up in this case.
This commit is contained in:
Gunar Schorcht 2021-12-27 11:37:57 +01:00
parent 3053b87a5e
commit ede5f9ebab
1 changed files with 3 additions and 0 deletions
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3
sys/arduino/base.cpp
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@ -32,6 +32,7 @@ extern "C" {
void pinMode(int pin, int mode) void pinMode(int pin, int mode)
{ {
assert(gpio_is_valid(arduino_pinmap[pin]));
gpio_mode_t m = GPIO_OUT; gpio_mode_t m = GPIO_OUT;
if (mode == INPUT) { if (mode == INPUT) {
@ -46,11 +47,13 @@ void pinMode(int pin, int mode)
void digitalWrite(int pin, int state) void digitalWrite(int pin, int state)
{ {
assert(gpio_is_valid(arduino_pinmap[pin]));
gpio_write(arduino_pinmap[pin], state); gpio_write(arduino_pinmap[pin], state);
} }
int digitalRead(int pin) int digitalRead(int pin)
{ {
assert(gpio_is_valid(arduino_pinmap[pin]));
if (gpio_read(arduino_pinmap[pin])) { if (gpio_read(arduino_pinmap[pin])) {
return HIGH; return HIGH;
} }