Arduino Changes - PalouseRobosub/SUBLIBinal GitHub Wiki
#Arduino Differences Due to the inherent construction differences between the PIC32MX2xx1xx series and the AVR ATMega328P, there are a number of differences to be known. Please refer to the list below to see the list of differences
- ADC Changes
- External Interrupt Changes
- I2C Changes
- UART Changes
- Timer Changes
- SPI Changes
- PWM Changes
####ADC Changes The ADC changes include the following:
- The
ADC_Channelenumeration has been changed to
typedef enum {
ADC_CH_0,
ADC_CH_1,
ADC_CH_2,
ADC_CH_3,
ADC_CH_4,
ADC_CH_5
} ADC_Channel;
These are the only channels available on the ATMega328P.
####External Interrupt Changes External interrupts have been changed in the following ways:
- Addition of pin change interrupts (an interrupt will be generated on the toggle of any enabled pin change pins). PCINT2 is triggered by a pin change on any of enabled PC[23:16], PCINT1 is triggered by a pin change on any of enabled PC[15:8], and PCINT0 is triggered by a pin change on any of enabled PC[7:0] regardless of the data direction of these pins.
- Modification of the
Interruptenumeration to
typedef enum {
INT0,
INT1,
PCINT0,
PCINT1,
PCINT2
}Interrupt;
- Modification of the Polarity enumeration to
typedef enum {
falling,
rising,
toggle
} Polarity;
- Modification of the Resistor enumeration to
typedef enum {
none,
pullup
} Resistor;
- Modification of the Interrupt_Config structure to
typedef struct INTERRUPT_CONFIG{
Interrupt extInt;
char pins;
Polarity polarity;
int enable;
Resistor resistor;
void *callback;
} Interrupt_Config;
The pins parameter is a bitfield of all chosen PCINT pins to be enabled for the respective PCINT. To enable PCINT0 and PCINT3 pins for extInt = PCINT0, you would supply the value of (1<<0)|(1<<3). If you supplied the value (1<<0)|(1<<3) when extInt = PCINT1, PCINT8 and PCINT11 pins would be enabled to trigger PCINT1.
Please note: When working with pin change interrupts, polarity and resistor values are not used!
####I2C Changes
####UART Changes
####Timer Changes
####SPI Changes
####PWM Changes