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29 * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
30 * All Rights Reserved.
33 * \brief AFSK modem hardware-specific definitions.
35 * \author Francesco Sacchi <batt@develer.com>
41 #include <cfg/compiler.h>
44 void hw_afsk_adc_init(int ch, struct Afsk * ctx);
45 void hw_afsk_dac_init(int ch, struct Afsk * ctx);
46 void hw_afsk_radioCtrl(int ch, bool en);
49 * Initialize the specified channel of the ADC for AFSK needs.
50 * The adc should be configured to have a continuos stream of convertions.
51 * For every convertion there must be an ISR that read the sample
52 * and call afsk_adc_isr(), passing the context and the sample.
54 * \param ch channel to be used for AFSK demodulation.
55 * \param ctx AFSK context (\see Afsk). This parameter must be saved and
56 * passed back to afsk_adc_isr() for every convertion.
58 #define AFSK_ADC_INIT(ch, ctx) hw_afsk_adc_init(ch, ctx)
60 #define AFSK_STROBE_INIT() do { PIOA_PER = BV(0); PIOA_OER = BV(0); PIOA_CODR = BV(0); } while (0)
61 #define AFSK_STROBE_ON() do { PIOA_SODR = BV(0); } while (0)
62 #define AFSK_STROBE_OFF() do { PIOA_CODR = BV(0); } while (0)
65 #define DAC_PIN_MASK (BV(19) | BV(20) | BV(21) | BV(22))
71 * Initialize the specified channel of the DAC for AFSK needs.
72 * The DAC has to be configured in order to call an ISR for every sample sent.
73 * The DAC doesn't have to start the IRQ immediatly but have to wait
74 * the AFSK driver to call AFSK_DAC_IRQ_START().
75 * The ISR must then call afsk_dac_isr() passing the AFSK context.
76 * \param ch DAC channel to be used for AFSK modulation.
77 * \param ctx AFSK context (\see Afsk). This parameter must be saved and
78 * passed back to afsk_dac_isr() for every convertion.
80 #define AFSK_DAC_INIT(ch, ctx) \
82 (void)ch, (void)ctx; \
83 /* Disable pullups */ \
84 PIOA_PUDR = DAC_PIN_MASK | BV(PTT_PIN) | BV(TX_LED_PIN); \
85 /* Set PIO to pin */ \
86 PIOA_PER = DAC_PIN_MASK | BV(PTT_PIN) | BV(TX_LED_PIN); \
87 /* Disable multidrive on pin */ \
88 PIOA_MDDR = DAC_PIN_MASK | BV(PTT_PIN) | BV(TX_LED_PIN); \
89 /* Enanble as autput */ \
90 PIOA_OER = DAC_PIN_MASK | BV(PTT_PIN) | BV(TX_LED_PIN); \
91 PIOA_CODR = BV(PTT_PIN); \
92 PIOA_SODR = BV(TX_LED_PIN); \
96 * Start DAC convertions on channel \a ch.
97 * \param ch DAC channel.
99 #define AFSK_DAC_IRQ_START(ch) \
102 extern bool hw_afsk_dac_isr; \
103 PIOA_SODR = BV(PTT_PIN); \
104 PIOA_CODR = BV(TX_LED_PIN); \
105 hw_afsk_dac_isr = true; \
109 * Stop DAC convertions on channel \a ch.
110 * \param ch DAC channel.
112 #define AFSK_DAC_IRQ_STOP(ch) \
115 extern bool hw_afsk_dac_isr; \
116 PIOA_CODR = BV(PTT_PIN); \
117 PIOA_SODR = BV(TX_LED_PIN); \
118 hw_afsk_dac_isr = false; \
122 #endif /* HW_AFSK_H */