ret_code_t nrf_drv_csense_sample(void)
{
ASSERT(m_csense.module_state == NRF_DRV_STATE_POWERED_ON);
if(m_csense.adc_channels_input_mask != 0)
{
if(m_csense.channels_to_read == 0)
{
#if USE_COMP == 0 && defined(SAADC_PRESENT)
nrf_saadc_enable();
#endif
if(nrf_drv_csense_is_busy() == true)
{
return NRF_ERROR_BUSY;
}
m_csense.busy = true;
m_csense.channels_to_read = m_csense.adc_channels_input_mask;
calculate_next_channel();
}
#if USE_COMP
if (!m_csense.timers_powered_on)
{
nrf_drv_timer_enable(&m_timer0);
nrf_drv_timer_enable(&m_timer1);
m_csense.timers_powered_on = true;
}
else
{
nrf_drv_timer_resume(&m_timer0);
nrf_drv_timer_resume(&m_timer1);
}
nrf_drv_comp_pin_select((nrf_comp_input_t)m_csense.cur_chann_idx);
nrf_drv_comp_start(0, 0);
#else
ret_code_t err_code;
#ifdef ADC_PRESENT
adc_channel.config.config.ain = (nrf_adc_config_input_t)(1<<m_csense.cur_chann_idx);
nrf_gpio_pin_clear(m_csense.output_pin);
err_code = nrf_drv_adc_sample_convert(&adc_channel, NULL);
#elif defined(SAADC_PRESENT)
saadc_channel.pin_p = (nrf_saadc_input_t)(m_csense.cur_chann_idx + 1);
nrf_saadc_channel_input_set(0, saadc_channel.pin_p, NRF_SAADC_INPUT_DISABLED);
nrf_gpio_pin_clear(m_csense.output_pin);
err_code = nrf_drv_saadc_sample();
#endif //ADC_PRESENT
if(err_code != NRF_SUCCESS)
{
return err_code;
}
#endif //USE_COMP
}
return NRF_SUCCESS;
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
timer0_init(); // Timer used to blink the LEDs.
timer1_init(); // Timer to generate events on even number of seconds.
timer2_init(); // Timer to generate events on odd number of seconds.
ppi_init(); // PPI to redirect the event to timer start/stop tasks.
uint32_t err_code;
const app_uart_comm_params_t comm_params =
{
RX_PIN_NUMBER,
TX_PIN_NUMBER,
RTS_PIN_NUMBER,
CTS_PIN_NUMBER,
APP_UART_FLOW_CONTROL_ENABLED,
false,
UART_BAUDRATE_BAUDRATE_Baud115200
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_error_handle,
APP_IRQ_PRIORITY_LOW,
err_code);
APP_ERROR_CHECK(err_code);
// Enabling constant latency as indicated by PAN 11 "HFCLK: Base current with HFCLK
// running is too high" found at Product Anomaly document found at
// https://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF51822/#Downloads
//
// @note This example does not go to low power mode therefore constant latency is not needed.
// However this setting will ensure correct behaviour when routing TIMER events through
// PPI (shown in this example) and low power mode simultaneously.
NRF_POWER->TASKS_CONSTLAT = 1;
// Start clock.
nrf_drv_timer_enable(&timer0);
nrf_drv_timer_enable(&timer1);
nrf_drv_timer_enable(&timer2);
// Loop and increment the timer count value and capture value into LEDs. @note counter is only incremented between TASK_START and TASK_STOP.
while (true)
{
printf("Current count: %d\n\r", (int)nrf_drv_timer_capture(&timer0,NRF_TIMER_CC_CHANNEL0));
/* increment the counter */
nrf_drv_timer_increment(&timer0);
nrf_delay_ms(100);
}
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
ret_code_t err_code;
err_code = nrf_drv_ppi_init();
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
err_code = nrf_drv_timer_init(&timer, &timer_cfg, timer_dummy_handler);
APP_ERROR_CHECK(err_code);
#ifdef NRF51
//Workaround for PAN-73.
*(uint32_t *)0x40008C0C = 1;
#endif
// Setup PPI channel with event from TIMER compare and task GPIOTE pin toggle.
led_blinking_setup();
// Enable timer
nrf_drv_timer_enable(&timer);
while (true)
{
// Do Nothing - GPIO can be toggled without software intervention.
}
}
uint32_t app_simple_timer_start(app_simple_timer_mode_t mode,
app_simple_timer_timeout_handler_t timeout_handler,
uint16_t timeout_ticks,
void * p_context)
{
uint32_t err_code = NRF_SUCCESS;
nrf_timer_short_mask_t timer_short;
VERIFY_PARAM_NOT_NULL(timeout_handler);
if (APP_SIMPLE_TIMER_MODE_REPEATED == mode)
{
timer_short = NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK;
}
else if (APP_SIMPLE_TIMER_MODE_SINGLE_SHOT == mode)
{
timer_short = NRF_TIMER_SHORT_COMPARE0_STOP_MASK;
}
else
{
return NRF_ERROR_INVALID_PARAM;
}
if (SIMPLE_TIMER_STATE_IDLE == m_simple_timer_state)
{
return NRF_ERROR_INVALID_STATE;
}
if (SIMPLE_TIMER_STATE_STARTED == m_simple_timer_state)
{
err_code = app_simple_timer_stop();
APP_ERROR_CHECK(err_code);
}
if (SIMPLE_TIMER_STATE_STOPPED == m_simple_timer_state)
{
nrf_drv_timer_clear(&SIMPLE_TIMER);
}
m_mode = mode;
m_timeout_handler = timeout_handler;
mp_timeout_handler_context = p_context;
nrf_drv_timer_extended_compare(
&SIMPLE_TIMER, NRF_TIMER_CC_CHANNEL0, (uint32_t)timeout_ticks, timer_short, true);
if (m_simple_timer_state == SIMPLE_TIMER_STATE_STOPPED)
{
nrf_drv_timer_resume(&SIMPLE_TIMER);
}
else
{
nrf_drv_timer_enable(&SIMPLE_TIMER);
}
m_simple_timer_state = SIMPLE_TIMER_STATE_STARTED;
return NRF_SUCCESS;
}
void saadc_sampling_event_init(void)
{
ret_code_t err_code;
err_code = nrf_drv_ppi_init();
APP_ERROR_CHECK(err_code);
nrf_drv_timer_config_t timer_config = NRF_DRV_TIMER_DEFAULT_CONFIG;
timer_config.frequency = NRF_TIMER_FREQ_31250Hz;
err_code = nrf_drv_timer_init(&m_timer, &timer_config, timer_handler);
APP_ERROR_CHECK(err_code);
/* setup m_timer for compare event */
uint32_t ticks = nrf_drv_timer_ms_to_ticks(&m_timer,SAADC_SAMPLE_RATE);
nrf_drv_timer_extended_compare(&m_timer, NRF_TIMER_CC_CHANNEL0, ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false);
nrf_drv_timer_enable(&m_timer);
uint32_t timer_compare_event_addr = nrf_drv_timer_compare_event_address_get(&m_timer, NRF_TIMER_CC_CHANNEL0);
uint32_t saadc_sample_event_addr = nrf_drv_saadc_sample_task_get();
/* setup ppi channel so that timer compare event is triggering sample task in SAADC */
err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_assign(m_ppi_channel, timer_compare_event_addr, saadc_sample_event_addr);
APP_ERROR_CHECK(err_code);
}
/** @brief Function initialization and configuration of timer driver instance.
*/
static void timer_config(void) {
uint32_t time_in_ms = 1000; //Time(in miliseconds) between consecutive compare events.
// see
uint32_t time2ticks;
uint32_t err_code;
err_code = nrf_drv_timer_init(&mytimer1, NULL, timer1_handler);
APP_ERROR_CHECK(err_code);
time2ticks = nrf_drv_timer_ms_to_ticks(&mytimer1, time_in_ms);
/*
|----| |----|
| | | |
____| |______________________..._____| |____...
1s 1s 8s 1s 1s
*/
nrf_drv_timer_extended_compare(&mytimer1, NRF_TIMER_CC_CHANNEL0, time2ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
nrf_drv_timer_enable(&mytimer1);
}
/** @brief Function for initializing PPI used in infrared signal decoding
* The PPI is needed to convert the timer event into a task.
*/
uint32_t ir_ppi_init(void)
{
uint32_t gpiote_event_addr;
uint32_t timer_task_addr;
nrf_ppi_channel_t ppi_channel;
ret_code_t err_code;
nrf_drv_gpiote_in_config_t config;
config.sense = NRF_GPIOTE_POLARITY_HITOLO;
config.pull = NRF_GPIO_PIN_PULLUP;
config.hi_accuracy = false;
config.is_watcher = false;
nrf_drv_timer_config_t timer_config;
timer_config.frequency = NRF_TIMER_FREQ_1MHz;
timer_config.mode = NRF_TIMER_MODE_TIMER;
timer_config.bit_width = NRF_TIMER_BIT_WIDTH_32;
timer_config.interrupt_priority = 3;
err_code = nrf_drv_timer_init(&ir_timer, &timer_config, timer_dummy_handler);
APP_ERROR_CHECK(err_code);
// Set up GPIOTE
err_code = nrf_drv_gpiote_in_init(IR_RECEIVER_PIN_1, &config, ir_in_pin_handler);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_in_init(IR_RECEIVER_PIN_2, &config, ir_in_pin_handler);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_in_init(IR_RECEIVER_PIN_3, &config, ir_in_pin_handler);
APP_ERROR_CHECK(err_code);
// Set up timer for capturing
nrf_drv_timer_capture_get(&ir_timer, NRF_TIMER_CC_CHANNEL0);
// Set up PPI channel
err_code = nrf_drv_ppi_channel_alloc(&ppi_channel);
APP_ERROR_CHECK(err_code);
timer_task_addr = nrf_drv_timer_capture_task_address_get(&ir_timer, NRF_TIMER_CC_CHANNEL0);
gpiote_event_addr = nrf_drv_gpiote_in_event_addr_get(IR_RECEIVER_PIN_1);
//err_code = nrf_drv_ppi_channel_assign(ppi_channel, gpiote_event_addr, timer_task_addr);
//APP_ERROR_CHECK(err_code);
//err_code = nrf_drv_ppi_channel_enable(ppi_channel);
//APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(IR_RECEIVER_PIN_1, true);
nrf_drv_gpiote_in_event_enable(IR_RECEIVER_PIN_2, true);
nrf_drv_gpiote_in_event_enable(IR_RECEIVER_PIN_3, true);
// Enable timer
nrf_drv_timer_enable(&ir_timer);
return 0;
}
/* QF callbacks ============================================================*/
void QF_onStartup(void) {
nrf_drv_timer_enable(&TIMER1);
void advertising_start(); advertising_start();
}
