avr/prime-tx/main.c

#include <avr/io.h>
#include <dio.h>
#include <display.h>
#include <rfm.h>
#include <spi.h>
#include <stdio.h>
#include <util/delay.h>

void status(display_t *display, rfm_t *radio, int clock) {
    op_mode_t mode = rfm_mode(radio);
    interrupt_flags_t flags = rfm_interrupts(radio);

    display_clear(display);

    char clock_str[16];
    sprintf(clock_str, "%4d ", clock);
    display_write_message(display, clock_str);

    if (mode.listen_on) display_write_message(display, "Listen ");
    if (mode.mode == sleep) display_write_message(display, "Sleep");
    if (mode.mode == standby) display_write_message(display, "Standby");
    if (mode.mode == fs) display_write_message(display, "FS");
    if (mode.mode == tx) display_write_message(display, "TX");
    if (mode.mode == rx) display_write_message(display, "RX");

    display_set_location(display, 1, 0);
    if (flags.mode_ready)       display_write_message(display, "R ");
    if (flags.rx_ready)         display_write_message(display, "RX ");
    if (flags.tx_ready)         display_write_message(display, "TX ");
    if (flags.timeout)          display_write_message(display, "TO ");
    if (flags.auto_mode)        display_write_message(display, "AM ");
    if (flags.sync_addr_match)  display_write_message(display, "SM ");
    if (flags.fifo_full)        display_write_message(display, "F ");
    if (flags.fifo_not_empty)   display_write_message(display, "NE ");
    if (flags.fifo_level)       display_write_message(display, "LE ");
    if (flags.fifo_overrun)     display_write_message(display, "OR ");
    if (flags.packet_sent)      display_write_message(display, "PS ");
    if (flags.payload_ready)    display_write_message(display, "PR");
    if (flags.crc_ok)           display_write_message(display, "CRC");
}

int main(void) {
    int clock = 0;
    uint8_t primes[] = { 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 0 };

    display_t display = {
        .reg = {
            .output         = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 7 },
            .shift_clock    = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 6 },
            .latch_clock    = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 5 },
        },
    };

    rfm_t radio = (rfm_t){
        .spi    = {
            .clock          = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 1 },
            .data_out       = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 2 },
            .data_in        = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 3 },
            .chip_select    = { .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 4 },
        },
        .irq    = { .ddr = &DDRE, .port = &PORTE, .pin = &PINE, .addr = 6 },
        .reset  = { .ddr = &DDRD, .port = &PORTD, .pin = &PIND, .addr = 4 },
    };

    _delay_ms(15);
    display_init(&display);

    rfm_error_e error;

    rfm_init(&radio, (uint8_t [4]){ 0xde, 0xca, 0xfb, 0xad }, 4, &error);

    status(&display, &radio, clock);

    int prime = 0;
    while (1) {
        status(&display, &radio, clock);

        op_mode_t mode = rfm_mode(&radio);
        interrupt_flags_t flags = rfm_interrupts(&radio);
        if (mode.mode == standby) {
            rfm_transmit(&radio, &primes[prime], 1);
            if (primes[prime] == 0) {
                prime = 0;
            } else {
                prime++;
            }
        } else if (mode.mode == tx && flags.packet_sent) {
            rfm_standby(&radio);
        }

        clock++;
        _delay_ms(1000);
    }
    return 0;
}