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33 * \brief AFSK modem hardware-specific definitions.
37 * \author Francesco Sacchi <batt@develer.com>
43 #include "cfg/cfg_arch.h"
48 void hw_afsk_adcInit(int ch, struct Afsk *_ctx);
49 void hw_afsk_dacInit(int ch, struct Afsk *_ctx);
52 * Initialize the specified channel of the ADC for AFSK needs.
53 * The adc should be configured to have a continuos stream of convertions.
54 * For every convertion there must be an ISR that read the sample
55 * and call afsk_adc_isr(), passing the context and the sample.
57 * \param ch channel to be used for AFSK demodulation.
58 * \param ctx AFSK context (\see Afsk). This parameter must be saved and
59 * passed back to afsk_adc_isr() for every convertion.
63 * This macro will be called for AFSK initialization. We could implement everything here as a macro,
64 * but since initialization is rather complicated we decided to split its own function. Such function
65 * is defined in hw_afsk.c.
66 * Remember: since this .c file is not created by the wizard, you must add it to your_project_name.mk.
67 * If you create the file using BeRTOS SDK, it will be added for you.
69 #define AFSK_ADC_INIT(ch, ctx) hw_afsk_adcInit(ch, ctx)
72 * Activate strobe pin. We use it for debugging purposes. If you don't use it, simply
73 * leave empty the following macros
75 #define AFSK_STROBE_INIT() do { DDRB |= BV(5); } while (0)
78 * Set the pin high. This macro is called at the beginning of the interrupt routine
80 #define AFSK_STROBE_ON() do { PORTB |= BV(5); } while (0)
83 * Set the pin low. This macro is called at the end of the interrupt routine
85 #define AFSK_STROBE_OFF() do { PORTB &= ~BV(5); } while (0)
88 * Initialize the specified channel of the DAC for AFSK needs.
89 * The DAC has to be configured in order to call an ISR for every sample sent.
90 * The DAC doesn't have to start the IRQ immediatly but have to wait
91 * the AFSK driver to call AFSK_DAC_IRQ_START().
92 * The ISR must then call afsk_dac_isr() passing the AFSK context.
93 * \param ch DAC channel to be used for AFSK modulation.
94 * \param ctx AFSK context (\see Afsk). This parameter must be saved and
95 * passed back to afsk_dac_isr() for every convertion.
97 #define AFSK_DAC_INIT(ch, ctx) do { (void)ch, (void)ctx; DDRD |= 0xF0; DDRB |= BV(3); } while (0)
100 * Start DAC convertions on channel \a ch.
101 * \param ch DAC channel.
103 #define AFSK_DAC_IRQ_START(ch) do { (void)ch; extern bool hw_afsk_dac_isr; PORTB |= BV(3); hw_afsk_dac_isr = true; } while (0)
106 * Stop DAC convertions on channel \a ch.
107 * \param ch DAC channel.
109 #define AFSK_DAC_IRQ_STOP(ch) do { (void)ch; extern bool hw_afsk_dac_isr; PORTB &= ~BV(3); hw_afsk_dac_isr = false; } while (0)
111 #endif /* HW_AFSK_H */