#include "hardware/gpio.h"
// Must declare the main assembly entry point before use.
void main_asm();
/**
* @brief Wrapper to allow the assembly code to call the gpio_init()
* SDK function.
*
* @param pin The GPIO pin number to initialise.
*/
void asm_gpio_init(int pin) {
gpio_init(pin);
}
/**
* @brief Wrapper to allow the assembly code to call the gpio_set_dir()
* SDK function.
*
* @param pin The GPIO pin number of which to set the direction.
* @param dir Specify the direction that the pin should be set to (0=input/1=output).
*/
void asm_gpio_set_dir(int pin, int dir) {
gpio_set_dir(pin, dir);
}
/**
* @brief Wrapper to allow the assembly code to call the gpio_get()
* SDK function.
*
* @param pin The GPIO pin number to read from.
* @return int Returns the current value of the GPIO pin.
*/
int asm_gpio_get(int pin) {
return gpio_get(pin);
}
/**
* @brief Wrapper to allow the assembly code to call the gpio_put()
* SDK function.
*
* @param pin The GPIO pin number to write to.
* @param value Specify the value that the pin should be set to (0/1).
*/
void asm_gpio_put(int pin, int value) {
gpio_put(pin, value);
}
/**
* @brief EXAMPLE - BLINK_ASM
* Simple example that uses assembly code to initialise
* the built-in LED on Raspberry Pi Pico and then flash
* it forever using a sleep routine to set the period of
* the flash.
*
* @return int Returns exit-status zero on completion.
*/
int main() {
// Jump into the main assembly code subroutine.
main_asm();
// Returning zero indicates everything went okay.
return 0;
}