/*
 / _____)             _              | |
( (____  _____ ____ _| |_ _____  ____| |__
 \____ \| ___ |    (_   _) ___ |/ ___)  _ \
 _____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
    ©2013 Semtech-Cycleo

Description:
	Minimum test program for the loragw_spi 'library'

License: Revised BSD License, see LICENSE.TXT file include in the project
Maintainer: Sylvain Miermont
*/


/* -------------------------------------------------------------------------- */
/* --- DEPENDANCIES --------------------------------------------------------- */

#include <stdint.h>
#include <stdio.h>

#include "loragw_reg.h"

/* -------------------------------------------------------------------------- */
/* --- MAIN FUNCTION -------------------------------------------------------- */

#define BURST_TEST_LENGTH	8192

int main()
{
	int32_t read_value, test_value;
	uint16_t lfsr;
	uint8_t burst_buffout[BURST_TEST_LENGTH];
	uint8_t burst_buffin[BURST_TEST_LENGTH];
	int i;
	
	printf("Beginning of test for loragw_reg.c\n");
	
	lgw_connect();
	/* 2 SPI transactions:
	-> 0x80 0x00		<- 0x00 0x00		forcing page 0
	-> 0x01 0x00		<- 0x00 0x64		checking version
	*/
	
	/* --- READ TEST --- */
	
	lgw_reg_w(LGW_SOFT_RESET, 1);
	lgw_reg_check(stdout);
	
	/* --- READ/WRITE COHERENCY TEST --- */
	
	/* 8b unsigned */
	test_value = 197; /* 11000101b */
	lgw_reg_w(LGW_IMPLICIT_PAYLOAD_LENGHT, test_value);
	lgw_reg_r(LGW_IMPLICIT_PAYLOAD_LENGHT, &read_value);
	printf("IMPLICIT_PAYLOAD_LENGHT = %d (should be %d)\n", read_value, test_value);
	
	/* 8b signed */
	/* NO SUCH REG AVAILABLE */
	// /* RADIO_SELECT is normally unsigned, modify it manually in loragw_reg.c */
	// test_value = -59; /* 11000101b */
	// lgw_reg_w(LGW_RADIO_SELECT, test_value);
	// lgw_reg_r(LGW_RADIO_SELECT, &read_value);
	// printf("RADIO_SELECT = %d (should be %d)\n", read_value, test_value);
	
	/* less than 8b, with offset, unsigned */
	test_value = 11; /* 1011b */
	lgw_reg_w(LGW_FRAME_SYNCH_PEAK2_POS, test_value);
	lgw_reg_r(LGW_FRAME_SYNCH_PEAK2_POS, &read_value);
	printf("FRAME_SYNCH_PEAK2_POS = %d (should be %d)\n", read_value, test_value);
	
	/* less than 8b, with offset, signed */
	/* NO SUCH REG AVAILABLE */
	// /* MBWSSF_FRAME_SYNCH_PEAK2_POS is normally unsigned, modify it manually in loragw_reg.c */
	// test_value = -5; /* 1011b */
	// lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_PEAK2_POS, test_value);
	// lgw_reg_r(LGW_MBWSSF_FRAME_SYNCH_PEAK2_POS, &read_value);
	// printf("MBWSSF_FRAME_SYNCH_PEAK2_POS = %d (should be %d)\n", read_value, test_value);
	
	/* 16b unsigned */
	test_value = 49253; /* 11000000 01100101b */
	lgw_reg_w(LGW_PREAMBLE_SYMB1_NB, test_value);
	lgw_reg_r(LGW_PREAMBLE_SYMB1_NB, &read_value);
	printf("PREAMBLE_SYMB1_NB = %d (should be %d)\n", read_value, test_value);
	
	/* 16b signed */
	/* NO SUCH REG AVAILABLE */
	// /* CAPTURE_PERIOD is normally unsigned, modify it manually in loragw_reg.c */
	// test_value = -16283; /* 11000000 01100101b */
	// lgw_reg_w(LGW_CAPTURE_PERIOD, test_value);
	// lgw_reg_r(LGW_CAPTURE_PERIOD, &read_value);
	// printf("CAPTURE_PERIOD = %d (should be %d)\n", read_value, test_value);
	
	/* between 8b and 16b, unsigned */
	test_value = 3173; /* 1100 01100101b */
	lgw_reg_w(LGW_ADJUST_MODEM_START_OFFSET_SF12_RDX4, test_value);
	lgw_reg_r(LGW_ADJUST_MODEM_START_OFFSET_SF12_RDX4, &read_value);
	printf("ADJUST_MODEM_START_OFFSET_SF12_RDX4 = %d (should be %d)\n", read_value, test_value);
	
	/* between 8b and 16b, signed */
	test_value = -1947; /* 11000 01100101b */
	lgw_reg_w(LGW_IF_FREQ_1, test_value);
	lgw_reg_r(LGW_IF_FREQ_1, &read_value);
	printf("IF_FREQ_1 = %d (should be %d)\n", read_value, test_value);
	
	/* --- BURST WRITE AND READ TEST --- */
	
	/* initialize data for SPI test */
	lfsr = 0xFFFF;
	for(i=0; i<BURST_TEST_LENGTH; ++i) {
		burst_buffout[i] = (uint8_t)(lfsr ^ (lfsr >> 4));
		/* printf("%05d # 0x%04x 0x%02x\n", i, lfsr, burst_buffout[i]); */
		lfsr = (lfsr & 1) ? ((lfsr >> 1) ^ 0x8679) : (lfsr >> 1);
	}
	
	lgw_reg_wb(LGW_TX_DATA_BUF_DATA, burst_buffout, 256);
	lgw_reg_rb(LGW_RX_DATA_BUF_DATA, burst_buffin, 256);
	
	/* impossible to check in software,
	RX_DATA_BUF_DATA is read-only,
	TX_DATA_BUF_DATA is write only,
	use a logic analyser */
	
	/* --- END OF TEST --- */
	
	lgw_disconnect();
	/* no SPI transaction */
	
	printf("End of test for loragw_reg.c\n");
	return 0;
}

/* --- EOF ------------------------------------------------------------------ */