hndrbrm/readme.md

## readme.md

      
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              readme.md
            
          
    Clone the sdk from bouffalo lab github.
git clone https://github.com/bouffalolab/bl_mcu_sdk

Use clion and open examples/helloworld as Makefile project (dont open it as cmake project).

After opening there will be error

The error happened because its use default phony rule 'all', which should be change into ''
Click the bench icon to modify it

Click the reload icon and it will shows successfull operation

Choose build mode.

And build it.

Note the build message on bottom

The second line will be used if we want to develop further on clion. For example to turn on code completion, etc.
After some time it will built successfull and theres will be file .bin


To download this firmware to the bl616, use BouffaloLabDevCube downloaded from bouffalo labs site:
https://dev.bouffalolab.com/download
Run the app, click the MCU tab, and choose the image file (use the .bin file)


Turn the UART mode on, by holding the boot button from off power then turn the power on, then release the button.
Click the refresh button, to refresh the list of uart devices.

Then the port will be populated

Then click create & download, and wait until the percentage bar turn into 100%

The next step is making a blinking led
copy the folder examples/helloworld to examples/blink
Delete the folder examples/blink/.idea and open the project as a cmake project
Replace 'CMake options' from the previous note, from '-G "Unix..." until last.
Then add environment for the path of mcu_sdk in BL_SDK_BASE

The cmake will be run and finish successfully

Then try to build it.


Next, replace the content of main.c with this:
#include "bflb_gpio.h"
#include "board.h"

struct bflb_device_s *gpio;

int main(void)
{
    board_init();

    gpio = bflb_device_get_by_name("gpio");
    printf("gpio output\r\n");
    bflb_gpio_init(gpio, GPIO_PIN_27, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0);
    bflb_gpio_init(gpio, GPIO_PIN_28, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0);

    while (1) {
        bflb_gpio_set(gpio, GPIO_PIN_27);
        bflb_gpio_reset(gpio, GPIO_PIN_28);
        bflb_mtimer_delay_ms(500);

        bflb_gpio_reset(gpio, GPIO_PIN_27);
        bflb_gpio_set(gpio, GPIO_PIN_28);
        bflb_mtimer_delay_ms(500);
    }
}

Then compile and download it to the bl616, the you see the led below the power led will be blinking.