TX_Demo.cpp

#include "cc1100_raspi.h"
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>

#include <wiringPi.h>
#include <wiringPiSPI.h>

#define PACKAGE "CC1100 SW"
#define VERSION_SW "0.9.6"

#define INTERVAL_1S_TIMER 1000

uint8_t Tx_fifo[FIFOBUFFER], Rx_fifo[FIFOBUFFER];
uint8_t Tx_addr, Rx_addr, Pktlen, pktlen, Lqi, Rssi;
uint8_t rx_addr, sender, lqi;
int8_t rssi_dbm;

int cc1100_freq_select, cc1100_mode_select, cc1100_channel_select;

uint32_t prev_millis_1s_timer = 0;

uint8_t cc1100_debug = 0;

uint8_t tx_retries = 1;
uint8_t rx_demo_addr = 3;
uint32_t interval = 1000;

uint8_t SelfAddress = 8;
//set PA level in dbm
uint8_t Power = 0;

CC1100 cc1100;

void print_help(int exval)
{
	printf("%s,%s by CW\r\n", PACKAGE, VERSION_SW);
	printf("%s [-h] [-V] [-a SelfAddress] [-r RxDemo_Addr] [-i Msg_Interval] [-t tx_retries] [-c channel] [-f frequency]\r\n", PACKAGE);
	printf("          [-m modulation]\n\r\n\r");
	printf("  -h              			print this help and exit\r\n");
	printf("  -V              			print version and exit\r\n\r\n");
	printf("  -v              			set verbose flag\r\n");
	printf("  -a my address [1-255] 		set my address\r\n\r\n");
	printf("  -r rx address [1-255] 	  	set RxDemo receiver address\r\n\r\n");
	printf("  -i interval ms[1-6000] 	  	sets message interval timing\r\n\r\n");
	printf("  -t tx_retries [0-255] 	  	sets message send retries\r\n\r\n");
	printf("  -c channel 	[1-255] 		set transmit channel\r\n");
	printf("  -f frequency  [315,434,868,915]  	set ISM band\r\n\r\n");
	printf("  -m modulation [1,38,100,250,500,4]	set modulation\r\n\r\n");

	exit(exval);
}

int main(int argc, char *argv[])
{

	int opt;
	if (argc == 1)
	{
		fprintf(stderr, "This program needs arguments....\n\r\n\r");
		print_help(1);
	}

	while ((opt = getopt(argc, argv, "hVva:r:i:t:c:f:m:")) != -1)
	{
		switch (opt)
		{
		case 'h':
			print_help(0);
			break;
		case 'V':
			printf("%s %s\n\n", PACKAGE, VERSION_SW);
			exit(0);
			break;
		case 'v':
			printf("%s: Verbose option is set\n", PACKAGE);
			cc1100_debug = 1;
			break;
		case 'a':
			SelfAddress = atoi(optarg);
			break;
		case 'r':
			rx_demo_addr = atoi(optarg);
			break;
		case 'i':
			interval = atoi(optarg);
			break;
		case 't':
			tx_retries = atoi(optarg);
			break;
		case 'c':
			cc1100_channel_select = atoi(optarg);
			break;
		case 'f':
			cc1100_freq_select = atoi(optarg);
			switch (cc1100_freq_select)
			{
			case 315:
				cc1100_freq_select = 1;
				break;
			case 434:
				cc1100_freq_select = 2;
				break;
			case 868:
				cc1100_freq_select = 3;
				break;
			case 915:
				cc1100_freq_select = 4;
				break;
			}
			break;
		case 'm':
			cc1100_mode_select = atoi(optarg);

			switch (cc1100_mode_select)
			{
			case 1:
				cc1100_mode_select = 1;
				break;
			case 38:
				cc1100_mode_select = 2;
				break;

			case 100:
				cc1100_mode_select = 3;
				break;
			case 250:
				cc1100_mode_select = 4;
				break;
			case 500:
				cc1100_mode_select = 5;
				break;
			case 4:
				cc1100_mode_select = 6;
				break;
			}
			break;
		case ':':
			fprintf(stderr, "%s: Error - Option `%c' needs a value\n\n", PACKAGE, optopt);
			print_help(1);
			break;
		case '?':
			fprintf(stderr, "%s: Error - No such option: `%c'\n\n", PACKAGE, optopt);
			print_help(1);
		}
	}

	// print all remaining options
	for (; optind < argc; optind++)
		printf("argument: %s\n", argv[optind]);

	//------------- welcome message ------------------------
	printf("Raspberry CC1101 SPI Library test\n");

	//------------- hardware setup ------------------------

	wiringPiSetup(); //setup wiringPi library

	cc1100.begin(SelfAddress); //setup cc1000 RF IC
	cc1100.sidle();
	//set PA level
	cc1100.set_output_power_level(Power); 

	cc1100.receive();

	cc1100.show_main_settings(); //shows setting debug messages to UART
	cc1100.show_register_settings();
	//------------------------- Main Loop ------------------------
	for (;;)
	{
		delay(1); //delay to reduce system load

		if (millis() - prev_millis_1s_timer >= interval) // one second update timer
		{
			Rx_addr = rx_demo_addr; //receiver address

			uint32_t time_stamp = millis(); //generate time stamp

			Tx_fifo[3] = (uint8_t)(time_stamp >> 24); //split 32-Bit timestamp to 4 byte array
			Tx_fifo[4] = (uint8_t)(time_stamp >> 16);
			Tx_fifo[5] = (uint8_t)(time_stamp >> 8);
			Tx_fifo[6] = (uint8_t)(time_stamp);

			Pktlen = 0x07; //set packet len to 0x13

			uint8_t res = cc1100.sent_packet(SelfAddress, Rx_addr, Tx_fifo, Pktlen, tx_retries);

			if (res == 1) //sents package over air. ACK is received via GPIO polling
			{
				printf("transmitted tx_timestamp: %ums \r\n\r\n", time_stamp);
			}
			prev_millis_1s_timer = millis();
		}
	}
	printf("finished!\n");
	return 0;
}