void ccRx(void) {
PORTC &= ~_BV(PC2);
_delay_ms(20);
uint8_t receiver_buf[7];
command(SFRX); // command to flush RX FIFO
_delay_ms(1);
command(SRX); // command to receive data wirelessly
while( (MASK_MARCSTATE(cc2500_get_status(CC2500_MARCSTATE)) != MARCSTATE_IDLE_STATE) ) { //ждать пока не закончится прием пакета
cc2500_get_status(CC2500_PKTSTATUS);
}
if ( cc2500_get_status(CC2500_RXBYTES) == 0 ) { //exit if rx fifo empty(autoflush)
PORTC |= _BV(PC3) | _BV(PC5);
_delay_ms(200);
PORTC &= ~(_BV(PC3) | _BV(PC5));
return;
}
cc2500_fifo_read(receiver_buf, 7);
command(SFRX); // flush receiver FIFO if owerflow state
command(SIDLE); // turn CC2500 into idle mode
command(SFRX); // flush receiver FIFO in IDDLE mode
receiver_buf[2] = *(uint8_t *)&freq;
receiver_buf[3] = *(((uint8_t *)&freq)+1);
receiver_buf[4] = cc2500_get_status(CC2500_RSSI);
receiver_buf[5] = cc2500_get_rssi();
RS485_DE_HIGH;
for(uint8_t i=0; i<7; i++) {
uart0_putc(receiver_buf[i]);
}
//uart0_puts((const char *)receiver_buf);
_delay_ms(10);
RS485_DE_LOW;
//test LED ON if packet received and data correct
// if (receiver_buf[0] == 0x6A) {
// PORTC |= _BV(PC3);
// _delay_ms(200);
// }
// if (receiver_buf[1] == 0x6A) {
// PORTC |= _BV(PC4);
// _delay_ms(200);
// }
// if (receiver_buf[2] == 0x6A) {
// PORTC |= _BV(PC5);
// _delay_ms(200);
// }
// PORTC &= ~( _BV(PC3) | _BV(PC4) | _BV(PC5) );//LED OFF
// _delay_ms(100);
//receive();
//send();
CC_state=CC_IDLE;
}
void drawSpecAnLiveScreen() {
/********************************
*2.4GHz SpecAn (Live View) *
* *
* *
* *
* *
* *
* *
* *
* *
*^2400 MHz 2483 MHz^*
********************************/
lcd_set_color3(0, 0, 29); // make "2.4GHz SpecAn (Live View)" white
lcd_printf(0, 0, "2.4GHz SpecAn (Live View) ");
lcd_printf(0, 1, " ");
lcd_printf(0, 2, " ");
lcd_printf(0, 3, " ");
lcd_printf(0, 4, " ");
lcd_printf(0, 5, " ");
lcd_printf(0, 6, " ");
lcd_printf(0, 7, " ");
lcd_printf(0, 8, " ");
lcd_printf(0, 9, "^2400 MHz 2483 MHz^");
// reconfigure the CC2500 for use as a spectrum analyzer
cc2500_send_strobe(SRES); // reset
for(volatile uint32_t i = 0; i < 99999; i++); // wait for reset to finish
cc2500_write_register(IOCFG2, 0x0B);
cc2500_write_register(IOCFG0, 0x0C);
cc2500_write_register(PKTCTRL0, 0x12);
cc2500_write_register(FSCTRL1, 0x0C);
cc2500_write_register(FREQ2, 0x5C);
cc2500_write_register(FREQ1, 0x4E);
cc2500_write_register(FREQ0, 0xC4);
cc2500_write_register(MDMCFG4, 0x2E);
cc2500_write_register(MDMCFG3, 0x3B);
cc2500_write_register(MDMCFG2, 0x70);
cc2500_write_register(MDMCFG1, 0x43);
cc2500_write_register(MDMCFG0, 0xB8);
cc2500_write_register(DEVIATN, 0x00);
cc2500_write_register(MCSM0, 0x18);
cc2500_write_register(FOCCFG, 0x1D);
cc2500_write_register(BSCFG, 0x1C);
cc2500_write_register(AGCCTRL2, 0xC7);
cc2500_write_register(AGCCTRL0, 0xB0);
cc2500_write_register(FREND1, 0xB6);
cc2500_write_register(FSCAL3, 0xEA);
cc2500_write_register(FSCAL1, 0x00);
cc2500_write_register(FSCAL0, 0x19);
cc2500_write_register(PATABLE, 0xFF);
// draw live view
while(currentScreen == SPEC_AN_LIVE) {
#define CHANNEL_COUNT 240
#define HISTOGRAM_HEIGHT 216
int16_t y;
uint8_t history[CHANNEL_COUNT] = {0}; // store RSSI for every channel
// iterate over all channels and draw the histogram
lcd_pixel_stream_start();
for(uint8_t channel = 0; channel < CHANNEL_COUNT; channel++) {
cc2500_send_strobe(SIDLE);
cc2500_set_channel(channel);
cc2500_enter_rx_mode();
int16_t rssi = cc2500_get_rssi();
history[channel] = (uint8_t) rssi;
for(volatile uint32_t i = 0; i < 3000; i++); // not sure why this is required
lcd_pixel_stream_move_cursor(channel*2, 40);
for(y = HISTOGRAM_HEIGHT - 1; y >= 0; y--) {
if(y <= rssi)
lcd_pixel_stream_write_pixel(0b1111100000000000);
else
lcd_pixel_stream_write_pixel(0);
}
lcd_pixel_stream_move_cursor(channel*2+1, 40);
for(y = HISTOGRAM_HEIGHT - 1; y >= 0; y--) {
if(y <= rssi)
lcd_pixel_stream_write_pixel(0b1111100000000000);
else
lcd_pixel_stream_write_pixel(0);
}
}
lcd_pixel_stream_stop();
// calc max RSSI and display info
uint8_t maxRssi = 0;
uint8_t maxChNum = 0;
for(uint8_t i = 0; i < CHANNEL_COUNT; i++)
if(history[i] > maxRssi) {
maxRssi = history[i];
maxChNum = i;
}
int32_t dBm = ((int32_t) maxRssi) - 108; // convert back to raw rssi reading
dBm *= 5; // convert to units of 10 = 1dB
dBm -= 700; // remove 70dB of offset
dBm *= -1; // convert from negative to postiive number
uint32_t freq = 24000 + ((uint32_t) maxChNum) * 3.49121094f; // units of 10 = 1MHz. channel spacing = 349.121094 kHz
lcd_pixel_stream_start();
lcd_pixel_stream_move_cursor(maxChNum*2, 40);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_move_cursor(maxChNum*2+1, 40);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_write_pixel(0b0000011111100000);
lcd_pixel_stream_stop();
lcd_printf(0, 8, " PEAK: %p41 MHz -%p21 dBm ", freq, (uint32_t) dBm);
}
}