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/*
Copyright (c) 2015 Arduino LLC. All right reserved.
Copyright (c) 2016 Sandeep Mistry All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "nrf.h"
#include "Arduino.h"
#ifdef __cplusplus
extern "C" {
#endif
void pinMode( uint32_t ulPin, uint32_t ulMode )
{
if (ulPin >= PINS_COUNT) {
return;
}
ulPin = g_ADigitalPinMap[ulPin];
NRF_GPIO_Type * port = nrf_gpio_pin_port_decode(&ulPin);
// Set pin mode according to chapter '22.6.3 I/O Pin Configuration'
switch ( ulMode )
{
case INPUT:
// Set pin to input mode
port->PIN_CNF[ulPin] = ((uint32_t)GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)
| ((uint32_t)GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| ((uint32_t)GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
| ((uint32_t)GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| ((uint32_t)GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
break;
case INPUT_PULLUP:
// Set pin to input mode with pull-up resistor enabled
port->PIN_CNF[ulPin] = ((uint32_t)GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)
| ((uint32_t)GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| ((uint32_t)GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos)
| ((uint32_t)GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| ((uint32_t)GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
break;
case INPUT_PULLDOWN:
// Set pin to input mode with pull-down resistor enabled
port->PIN_CNF[ulPin] = ((uint32_t)GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos)
| ((uint32_t)GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| ((uint32_t)GPIO_PIN_CNF_PULL_Pulldown << GPIO_PIN_CNF_PULL_Pos)
| ((uint32_t)GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| ((uint32_t)GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
break;
case OUTPUT:
// Set pin to output mode
port->PIN_CNF[ulPin] = ((uint32_t)GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos)
| ((uint32_t)GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
| ((uint32_t)GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
| ((uint32_t)GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| ((uint32_t)GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
break;
default:
// do nothing
break ;
}
}
void digitalWrite( uint32_t ulPin, uint32_t ulVal )
{
if (ulPin >= PINS_COUNT) {
return;
}
ulPin = g_ADigitalPinMap[ulPin];
NRF_GPIO_Type * port = nrf_gpio_pin_port_decode(&ulPin);
switch ( ulVal )
{
case LOW:
port->OUTCLR = (1UL << ulPin);
break ;
default:
port->OUTSET = (1UL << ulPin);
break ;
}
}
int digitalRead( uint32_t ulPin )
{
if (ulPin >= PINS_COUNT) {
return 0;
}
ulPin = g_ADigitalPinMap[ulPin];
NRF_GPIO_Type * port = nrf_gpio_pin_port_decode(&ulPin);
uint32_t const bm = (1UL << ulPin);
// Return bit in OUT or IN depending on configured direction
return (bm & ((port->DIR & bm) ? port->OUT : port->IN)) ? 1 : 0;
}
void digitalToggle( uint32_t pin )
{
int state = 1 - digitalRead(pin);
digitalWrite(pin, state);
}
void ledOn(uint32_t pin)
{
digitalWrite(pin, LED_STATE_ON);
}
void ledOff(uint32_t pin)
{
digitalWrite(pin, 1-LED_STATE_ON);
}
#ifdef __cplusplus
}
#endif
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