Contributed by End, curated by Ai-Thinker

04 - Lighting an LED from Scratch on the Ai-M61-32S

Reference Posts

Code compilation and flashing https://bbs.ai-thinker.com/forum.php?mod=viewthread&tid=43739

Environment setup https://bbs.ai-thinker.com/forum.php?mod=viewthread&tid=520

Software and hardware platform

Operation Steps

1

Set up the environment

Set up the environment Most people joining this activity have already set up the environment; basically, as long as make succeeds, you’re good. The post above also provides a tutorial, so I won’t repeat it. The key next step is finding the SDK — that’s the most important thing for development.

2

Choose an example

Choose an example In Ai-M6X-SDK, find the gpio peripheral files under examples. The examples provide rich development cases worth learning.

3

Write the code

Write the code Copy gpio_input_output and rename it gpio_input_output_rgb. Of course, you can directly use the provided example without creating a new one; I just did this for clarity.

Modify cmakelist.txt: project(gpio_input_output_rgb) Write the code:

#include "bflb_gpio.h"
#include "board.h"

struct bflb_device_s *gpio;

uint32_t gpio_group[] = {GPIO_PIN_12, GPIO_PIN_14, GPIO_PIN_15};
int main(void)
{
    board_init();

    gpio = bflb_device_get_by_name("gpio"); // get gpio device

    // set gpio pin mode
    bflb_gpio_init(gpio, GPIO_PIN_12, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0);
    bflb_gpio_init(gpio, GPIO_PIN_14, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0);
    bflb_gpio_init(gpio, GPIO_PIN_15, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0);

    
    bflb_gpio_reset(gpio, GPIO_PIN_12);
    bflb_gpio_reset(gpio, GPIO_PIN_14);
    bflb_gpio_reset(gpio, GPIO_PIN_15);
    uint8_t i = 0;
    while (1) {
        for(uint8_t j = 0; j < 2; j++) {
            bflb_gpio_set(gpio, gpio_group);
            bflb_mtimer_delay_ms(200);
            bflb_gpio_reset(gpio, gpio_group);
            bflb_mtimer_delay_ms(200);
        }
        bflb_gpio_set(gpio, gpio_group);
        bflb_mtimer_delay_ms(500);
        bflb_gpio_reset(gpio, gpio_group);
        i = (i + 1) % 3;
    }
}

4

Download the code

Download the code Connect the board to the computer with a Type-C cable, open Device Manager, and check the ports. Since the board has an onboard CH340 chip, no other tools are needed. Open a terminal and run make clean to clear any build files from previous compilations, then run make again. Ready to download. First hold the IO2 button to enter flash mode — keep holding it. Then press the EN button and release, and enter make flash COMX=COM16 in the command line to start flashing. After flashing, press EN to reset and you can see the RGB LED blinking.

5

Observe the result

Observe the result

Have questions?

For other questions, please visit the unified discussion area: Ai-Thinker Discussions