1. ืืืื
ืขื ืกืืจ ืืืื ืขืืื ืืืฉืืื ืฉื ืคืืชืื ืคืจืืืืงืื ืชืงืฉืืจืช ืืืืงืจื-ืืงืจ nrf52832 ืขื ืฉื ื ืืื ืืชื ืกืื ืืื ืขื ืืฆื ืืฉืจ.
ืืืฉืืื ืืชืืจืจื ืืื ืงืื, ืฉืื ืขืืืชื ืืคื ื ืืืกืจ ืื ืืืืข ืืืื. ืกืืืจ ืืืชืจ ืฉ"ืฉืืจืฉ ืืจืืข" ื ืืฆื ื-SDK ืฉื Nordic Semiconductor ืขืฆืื - ืขืืืื ื ืืจืกื ืงืืืขืื, ืืชืืจืืช ืืกืืืืช ืืคืื ืงืฆืืื ืืืืช ืืืืืืช. ืืืืชื ืฆืจืื ืืืชืื ืืื ืืืคืก.
ืื ื ืืืฉื ืฉืื ืืฉื ืืื ืื ืจืืืื ืื ืืืชืืกืก ืขื ืืขืืืื ืฉืืฉืื ืืื ืืฉ ืืืกื ืืช BLE ืืืขืจืืช ืฉืืื ืฉื "ืืืฆืจืื ืืืืื" ืืืฆื ืืืกืืื ืืื ืจืืื. ืืื ืื ื ืื ืืื ืก ืืืชืจ ืืื ืืืืง ืืืื ื, ืฉืื ืืืืจืื ืจืืื ื ืืชืื ืื ืืฉื ืื.
2. ืชืืืืจ ืืคืจืืืงื
ืืจืื:
- Adafruit Feather nRF52 Bluefruit LE (ืื ืฉืืื ืืืืฉื ืื)
- HX711 ADC
- ืืื ืืชื ืกืื ืืื 2 ืื'. (50x2 ืง"ื)
- ืืชืื ืช ST-LINK V2
Soft
- IDE VSCODE
- NRF SDK 16
- OpenOCD
- ืืชืื ืช ST-LINK V2
ืืื ื ืืฆื ืืคืจืืืงื ืืื, ืืชื ืจืง ืฆืจืื ืืฆืืื ืืช ื-Makefile (ืฆืืื ืืช ืืืืงืื ืฉื ื-SDK ืฉืื).
3. ืชืืืืจ ืืงืื
ื ืฉืชืืฉ ืืืืืื GPIOTE ืืขืืืื ืขื ืฆืืื ืืืงืคื ืืืืืกืก ืขื ืงืฉืืจื ืฉื ืืฉืืืืช ืืืืจืืขืื, ืืื ืื ืืืืืื PPI ืืืขืืจืช ื ืชืื ืื ืืฆืืื ืืืงืคื ืืื ืืืืจ ืืื ืืฉืชืชืคืืช ืฉื ืืขืื.
ret_code_t err_code;
err_code = nrf_drv_gpiote_out_init(PD_SCK, &config);//ะฝะฐัััะฐะตะฒะฐะตะผ ะฝะฐ ะฒัั
ะพะด
nrf_drv_gpiote_out_config_t config = GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);//ะฑัะดะตะผ ะฟะตัะตะดะตัะณะธะฒะฐัั ะฟะธะฝ ะดะปั ะธะผะฟัะปััะฐ
err_code = nrf_drv_gpiote_out_init(PD_SCK, &config);//ะฝะฐัััะฐะตะฒะฐะตะผ ะฝะฐ ะฒัั
ะพะด
ืื ื ืืืืืจืื ืืช ืงื ืืกื ืืจืื PD_SCL ืืืืฆื ืืื ืืืฆืืจ ืคืืืกืื ืืืืจื ืฉื 10 ืืืงืจืื.
nrf_drv_gpiote_in_config_t gpiote_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(false);// ะฟะตัะตั
ะพะด ััะพะฒะฝั ั ะฒััะพะบะพะณะพ ะฝะฐ ะฝะธะทะบะธะน
nrf_gpio_cfg_input(DOUT, NRF_GPIO_PIN_NOPULL);// ะฝะฐ ะฒั
ะพะด ะฑะตะท ะฟะพะดััะถะบะธ
err_code = nrf_drv_gpiote_in_init(DOUT, &gpiote_config, gpiote_evt_handler);
static void gpiote_evt_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
nrf_drv_gpiote_in_event_disable(DOUT);//ะพัะบะปััะฐะตะผ ะฟัะตััะฒะฐะฝะธะต
nrf_drv_timer_enable(&m_timer0);//ะฒะบะปััะฐะตะผ ัะฐะนะผะตั
}
ืื ื ืืืืืจืื ืืช ืงื ืื ืชืื ืื DOUT ืืงืจืื ืืช ืืฆื ืืืืื ืืช ืฉื ื-HX711; ืื ืืฉ ืจืื ื ืืืื, ืืืคืขื ืืืคื ืฉืื ืื ื ืืฉืืืชืื ืืช ืืืคืจืขื ืืืชืืืืื ืืืืืจ ืืืฆืืจืช ืคืืืกื ืฉืขืื ืืืืฆื PD_SCL.
err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel1);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_assign(m_ppi_channel1, nrf_drv_timer_event_address_get(&m_timer0, NRF_TIMER_EVENT_COMPARE0), nrf_drv_gpiote_out_task_addr_get(PD_SCK));// ะฟะพะดะบะปััะฐะตะผ ัะฐะนะผะตั ะบ ะฒัั
ะพะดั
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_enable(m_ppi_channel1);// ะฒะบะปััะฐะตะผ ะบะฐะฝะฐะป
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_out_task_enable(PD_SCK);
// ืืคืขื ืืช gpiote
ืืืืจ ืืื, ืื ื ืืืชืืืื ืืช ืืืืื ื-PPI ืืืืืจืื ืืช ืืืืืืจ ืฉืื ื ืืคืื PD_SCL ืืื ืืืฆืืจ ืคืืืกืื ืืืืจื ืฉื 10 ฮผs ืืืฉืจ ืืชืจืืฉ ืืืจืืข ืืฉืืืื, ืืื ืืืคืขืื ืืช ืืืืื GPIOTE.
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;// ะฟะพ ัะผะพะปัะฐะฝะธั
timer_cfg.frequency = NRF_TIMER_FREQ_1MHz;// ัะฐะบัะธััะตะผ ะฝะฐ ัะฐััะพัะต 1ะะณั
ret_code_t err_code = nrf_drv_timer_init(&m_timer0, &timer_cfg, timer0_event_handler);
APP_ERROR_CHECK(err_code);
nrf_drv_timer_extended_compare(&m_timer0,
NRF_TIMER_CC_CHANNEL0,
nrf_drv_timer_us_to_ticks(&m_timer0,
10),
NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK,
true);// ััะฐะฑะฐััะฒะฐะตั ะฟะพ ััะฐะฒะฝะตะฝะธั
ืื ื ืืืชืืืื ืืช ืืืืืจ ืืืคืก ืืืืืคื ืฉืื.
if(m_counter%2 != 0 && m_counter<=48){
buffer <<= 1;// ะฟะตัะตะผะตะฝะฝะฐั ััะธัะฐะฝะฝัั
ะดะฐะฝัั
c_counter++;// ััะตััะธะบ ะฟะพะปะพะถะธัะตะปัะฝัั
ะธะผะฟัะปััะพะฒ
if(nrf_gpio_pin_read(DOUT))buffer++;//ััะธััะฒะฐะตะผ ัะพััะพัะฝะธะต ะฒั
ะพะดะฐ
}
ืืืืจ ืืืขื ืืื ืืืืชืจ ืงืืจื ืืืืคื ืืืืืืจ. ืชืงืืคืช ืืืืคืง ืืื 20 ืืืงืจืื. ืื ื ืืขืื ืืื ืื ืืคืืืกืื ืื-ืืืืืื (ืืืืจื ืืงืฆื ืืขืืื) ืืืชื ืื ืฉืืกืคืจื ืืื ื ืขืืื ืขื 24, ืืืฉ 48 ืืืจืืขืื. ืืื ืืืจืืข ืื-ืืืื, ืงืืจืืื DOUT
ืืืืืืื ืื ืชืื ืื ืขืืื ืฉืืกืคืจ ืืคืืืกืื ืืืื ืืืืืช ืืคืืืช 25, ืื ืฉืืชืืื ืืืืืจ ืฉื 128 (ืืงืื ืืฉืชืืฉืชื ื-25 ืคืืืกืื), ืื ืฉืืื ืขืจื ื-50 ืืืจืืขื ืืืืืจ, ืื ืฉืืฆืืื ืืช ืกืืฃ ืืกืืจืช ืื ืชืื ืื.
++m_counter;// ััะตััะธะบ ัะพะฑััะธะน
if(m_counter==50){
nrf_drv_timer_disable(&m_timer0);// ะพัะบะปััะฐะตะผ ัะฐะนะผะตั
m_simple_timer_state = SIMPLE_TIMER_STATE_STOPPED;//
buffer = buffer ^ 0x800000;
hx711_stop();//jะพัะบะปััะฐะตะผ hx711
}
ืืืืจ ืืื, ืื ื ืืืืื ืืช ืืืืืืจ ืืืขืืืื ืืช ืื ืชืื ืื (ืืคื ืืืืืื ืื ืชืื ืื) ืืืขืืืจืื ืืช ื-HX711 ืืืฆื ืฆืจืืืช ืืฉืื ื ืืืื.
static void repeated_timer_handler(void * p_context)
{
nrf_drv_gpiote_out_toggle(LED_2);
if(m_simple_timer_state == SIMPLE_TIMER_STATE_STOPPED){
hx711_start();// ะฒะบะปััะฐะตะผ hx711
nrf_drv_gpiote_out_toggle(LED_1);
m_simple_timer_state = SIMPLE_TIMER_STATE_STARTED;
}
}
/**@brief Create timers.
*/
static void create_timers()
{
ret_code_t err_code;
// Create timers
err_code = app_timer_create(&m_repeated_timer_id,
APP_TIMER_MODE_REPEATED,
repeated_timer_handler);
APP_ERROR_CHECK(err_code);
}
ืื ื ืืฆืคืื ืืืืจืืขืื ืืืืืืจ RTC ืืืจืืื ืฉื 10 ืฉื ืืืช (ืื ืืคื ืฉืืงืื ืืขืชื) ืืืฉืืงืื ืืช ื-HX711 ืืืืคื, ืื ืฉืืืจื ืืืคืจืขื ืืงื DOUT.
ืืฉ ืขืื ื ืงืืื ืืืช, ืืืืื ืื ืืืคืงืื ืืืืฆืขืืช UART (ืงืฆื ืฉืืืืจ 115200, TX - 6 ืคืื ืื, RX - 8 ืคืื ืื) ืื ืืืืืจืืช ื ืืฆืืืช ื-sdk_config.h
ืืืฆืืื
ืชืืื ืืืืื ืขื ืชืฉืืืช ืืื, ืื ื ืืงืืื ืฉืืืืจ ืื ืืืื ืฉืืืืฉื ืืืงืืื ืืื ืืงืจ ืืืคืชืืื ืืืฆืื ืคืชืจืื. ืื ื ืจืืฆื ืืืืจ ืฉืืืืฉื ืืืื ืืช ืฉืื ืืฉืชืืฉืช Nordic ืืคืืืคืืจืืืช ืฉืื ืืื ืื ืืขื ืืื ืช ืื ืงืืืช ืืื ืฉื ืืขืืืืช ืื ืจืืืืช.
ื .ื.
ืืคืจืืืงื ืขืืืื ืืคืืชืื, ืื ืื ืื ืืฉื ืืื ืืขื ืืื, ืืืืืจ ืืื ืื ืกื ืืชืืจ ืืช ืืืืืืจืืชื ืืืืื ืืืืฉื ื ืืฉืงื, ืืื ืื ืืืืืจ ืืืกื ืืช BLE.
ืืืืจืื
ืงืื ืคืจืืืงื -
ืืืืืื ื ืชืื ืื ืขืืืจ HX711 ืืื ืืืืช -
ืชืืืืจ ืคืขืืืชื ืฉื ืืื ืืชื
ืืงืืจ: www.habr.com