/** @brief Function for configuring pins 0-7 as inputs and 8-15 as outputs.
*
*/
static void init(void)
{
// Port0 (0-7 as inputs)
nrf_gpio_range_cfg_input(BUTTON_START, BUTTON_STOP, BUTTON_PULL);
// Port1 (8-15 as outputs)
nrf_gpio_range_cfg_output(LED_START, LED_STOP);
}
/** Configure pins 0-7 as inputs and 8-15 as outputs.
*
*/
static void init(void)
{
// Port0 (0-7 as inputs)
nrf_gpio_range_cfg_input(0, 7, NRF_GPIO_PIN_NOPULL);
// Port1 (8-15 as outputs)
nrf_gpio_range_cfg_output(8, 15);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
// Start 16 MHz crystal oscillator.
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;
// Wait for the external oscillator to start up.
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
{
// Do nothing.
}
// Set Port 0 as input.
nrf_gpio_range_cfg_input(BUTTON_START, BUTTON_STOP, BUTTON_PULL);
// Set Port 1 as output.
nrf_gpio_range_cfg_output(LED_START, LED_STOP);
// Set radio configuration parameters.
radio_configure();
// Set payload pointer.
NRF_RADIO->PACKETPTR = (uint32_t)packet;
while (true)
{
// Read Data to send, button signals are default high, and low when pressed.
packet[0] = ~(nrf_gpio_port_read(NRF_GPIO_PORT_SELECT_PORT0)); // Write GPIO to payload byte 0.
NRF_RADIO->EVENTS_READY = 0U;
NRF_RADIO->TASKS_TXEN = 1; // Enable radio and wait for ready.
while (NRF_RADIO->EVENTS_READY == 0U)
{
// Do nothing.
}
// Start transmission.
NRF_RADIO->TASKS_START = 1U;
NRF_RADIO->EVENTS_END = 0U;
while (NRF_RADIO->EVENTS_END == 0U) // Wait for end of the transmission packet.
{
// Do nothing.
}
// Write sent data to port 1.
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT1, packet[0]);
NRF_RADIO->EVENTS_DISABLED = 0U;
NRF_RADIO->TASKS_DISABLE = 1U; // Disable the radio.
while (NRF_RADIO->EVENTS_DISABLED == 0U)
{
// Do nothing.
}
}
}
/*====================================================================================================*/
void NRF51_GPIO_Config( void )
{
nrf_gpio_range_cfg_output(LED_1, LED_4);
nrf_gpio_range_cfg_input(KEY_1, KEY_4, NRF_GPIO_PIN_PULLUP);
LED1_Set();
LED2_Set();
LED3_Set();
LED4_Set();
}
/** @brief Function for initializing the GPIO Tasks/Events peripheral.
*/
static void gpiote_init(void)
{
// Connect GPIO input buffers and configure PWM_OUTPUT_PIN_NUMBER as an output.
nrf_gpio_range_cfg_input(BUTTON_START, BUTTON_STOP, BUTTON_PULL);
nrf_gpio_cfg_output(PWM_OUTPUT_PIN_NUMBER);
nrf_gpio_port_clear(NRF_GPIO_PORT_SELECT_PORT0, 0xFF);
// Configure GPIOTE channel 0 to toggle the PWM pin state
// @note Only one GPIOTE task can be connected to an output pin.
nrf_gpiote_task_config(0, PWM_OUTPUT_PIN_NUMBER, \
NRF_GPIOTE_POLARITY_TOGGLE, NRF_GPIOTE_INITIAL_VALUE_LOW);
}
/**
* @brief Function for application main entry.
* @return 0. int return type required by ANSI/ISO standard.
*/
int main(void)
{
const uint8_t *key_packet;
uint8_t key_packet_size;
#ifdef USE_UART
simple_uart_config(0, SIMPLE_UART_TXD_PIN_NUMBER, 0, SIMPLE_UART_RXD_PIN_NUMBER, false); // Hardware flow control not used in this example.
#else
// Configure pins 24-30 for LEDs. Note that pin 31 is not connected.
nrf_gpio_range_cfg_output(24, 30);
#endif
// Enable pulldowns on row port, see matrix_row_port.
nrf_gpio_range_cfg_input(16, 23, NRF_GPIO_PIN_PULLDOWN);
// Column pin configuration, see matrix_column_port.
nrf_gpio_range_cfg_output(0, 15);
if (cherry8x16_init(matrix_row_port, matrix_column_port, CHERRY8x16_DEFAULT_KEY_LOOKUP_MATRIX) != CHERRY8x16_OK)
{
#ifdef USE_UART
simple_uart_putstring((const uint8_t *)"Init failed.");
#else
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT3, 0x55);
#endif
while (true)
{
// Do nothing.
}
}
while(true)
{
if (cherry8x16_new_packet(&key_packet, &key_packet_size))
{
#ifdef USE_UART
// Send the whole key packet over UART.
uart_puthidstring((char*)&key_packet[KEY_PACKET_KEY_INDEX]);
#else
// Show modifier key state using the LEDs. Note LED's use GPIO pins from 8 to 15.
nrf_gpio_port_write(NRF_GPIO_PORT_SELECT_PORT3, key_packet[KEY_PACKET_MODIFIER_KEY_INDEX]);
#endif
}
nrf_delay_ms(25);
}
}
void init(void)
{
/* Start 16 MHz crystal oscillator */
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;
/* Wait for the external oscillator to start up */
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
{
}
// Set radio configuration parameters
radio_configure();
// Set payload pointer
NRF_RADIO->PACKETPTR = (uint32_t)packet;
nrf_gpio_range_cfg_input(BUTTON_START, BUTTON_STOP, NRF_GPIO_PIN_PULLUP);
}
/*====================================================================================================*/
void GPIO_Config( void )
{
nrf_gpio_range_cfg_output(LED_1, LED_4);
nrf_gpio_range_cfg_input(KEY_1, KEY_4, NRF_GPIO_PIN_PULLUP);
}