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This commit is contained in:
Mark Qvist 2014-04-06 20:26:24 +02:00
parent b4de1f73ea
commit 19cca9487a
6 changed files with 66 additions and 26 deletions
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11
Modem/hardware.c
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@ -11,7 +11,7 @@
#include <avr/interrupt.h> // AVR interrupt functions from BertOS
// A reference to our modem "object"
static Afsk *context;
static Afsk *modem;
//////////////////////////////////////////////////////
// And now for the actual hardware functions //
@ -19,11 +19,10 @@ static Afsk *context;
// This function initializes the ADC and configures
// it the way we need.
void hw_afsk_adcInit(int ch, Afsk *_context)
void hw_afsk_adcInit(int ch, Afsk *_modem)
{
// Store a reference to our modem "object"
// FIXME: rename this
context = _context;
modem = _modem;
// Also make sure that we are not trying to use
// a pin that can't be used for analog input
@ -109,7 +108,7 @@ DECLARE_ISR(ADC_vect) {
// can't read negative voltages. By doing this simple
// math, we bring it back to an AC representation
// we can do further calculations on.
afsk_adc_isr(context, ((int16_t)((ADC) >> 2) - 128));
afsk_adc_isr(modem, ((int16_t)((ADC) >> 2) - 128));
// We also need to check if we're supposed to spit
// out some modulated data to the DAC.
@ -124,7 +123,7 @@ DECLARE_ISR(ADC_vect) {
// we also need to trigger another pin controlled
// by the PORTD register. This is the PTT pin
// which tells the radio to open it transmitter.
PORTD = (afsk_dac_isr(context) & 0xF0) | BV(3);
PORTD = (afsk_dac_isr(modem) & 0xF0) | BV(3);
else
// If we're not supposed to transmit anything, we
// keep quiet by continously sending 128, which