v1.0.0
* Initial release for SX1302 CoreCell Reference Design.
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Michael Coracin
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245
libloragw/tst/test_loragw_i2c.c
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245
libloragw/tst/test_loragw_i2c.c
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/*
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/ _____) _ | |
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( (____ _____ ____ _| |_ _____ ____| |__
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\____ \| ___ | (_ _) ___ |/ ___) _ \
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_____) ) ____| | | || |_| ____( (___| | | |
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(______/|_____)_|_|_| \__)_____)\____)_| |_|
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(C)2019 Semtech
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Description:
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Minimum test program for the loragw_i2c module
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License: Revised BSD License, see LICENSE.TXT file include in the project
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*/
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/* -------------------------------------------------------------------------- */
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/* --- DEPENDANCIES --------------------------------------------------------- */
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/* Fix an issue between POSIX and C99 */
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#if __STDC_VERSION__ >= 199901L
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#define _XOPEN_SOURCE 600
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#else
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#define _XOPEN_SOURCE 500
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h> /* sigaction */
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#include <unistd.h> /* getopt, access */
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#include <time.h>
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#include "loragw_i2c.h"
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#include "loragw_aux.h"
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#include "loragw_hal.h"
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/* -------------------------------------------------------------------------- */
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/* --- PRIVATE MACROS ------------------------------------------------------- */
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/* -------------------------------------------------------------------------- */
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/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
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#define I2C_PORT_STTS751 0x39
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#define STTS751_REG_TEMP_H 0x00
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#define STTS751_REG_TEMP_L 0x02
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#define STTS751_REG_CONF 0x03
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#define STTS751_REG_RATE 0x04
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#define STTS751_REG_PROD_ID 0xFD
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#define STTS751_REG_MAN_ID 0xFE
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#define STTS751_REG_REV_ID 0xFF
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#define STTS751_0_PROD_ID 0x00
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#define STTS751_1_PROD_ID 0x01
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#define ST_MAN_ID 0x53
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/* -------------------------------------------------------------------------- */
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/* --- GLOBAL VARIABLES ----------------------------------------------------- */
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/* Signal handling variables */
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static int exit_sig = 0; /* 1 -> application terminates cleanly (shut down hardware, close open files, etc) */
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static int quit_sig = 0; /* 1 -> application terminates without shutting down the hardware */
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static int i2c_dev = -1;
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/* -------------------------------------------------------------------------- */
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/* --- SUBFUNCTIONS DECLARATION --------------------------------------------- */
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static void sig_handler(int sigio);
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static void usage(void);
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/* -------------------------------------------------------------------------- */
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/* --- MAIN FUNCTION -------------------------------------------------------- */
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int main(int argc, char ** argv)
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{
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int i, err;
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static struct sigaction sigact; /* SIGQUIT&SIGINT&SIGTERM signal handling */
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uint8_t val;
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uint8_t high_byte, low_byte;
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int8_t h;
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float temperature;
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/* Parse command line options */
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while ((i = getopt(argc, argv, "hd:")) != -1) {
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switch (i) {
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case 'h':
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usage();
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return EXIT_SUCCESS;
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break;
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case 'd':
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if (optarg != NULL) {
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/* TODO */
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}
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break;
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default:
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printf("ERROR: argument parsing options, use -h option for help\n");
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usage();
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return EXIT_FAILURE;
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}
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}
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/* Configure signal handling */
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sigemptyset( &sigact.sa_mask );
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sigact.sa_flags = 0;
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sigact.sa_handler = sig_handler;
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sigaction( SIGQUIT, &sigact, NULL );
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sigaction( SIGINT, &sigact, NULL );
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sigaction( SIGTERM, &sigact, NULL );
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printf( "+++ Start of I2C test program +++\n" );
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/* Open I2C port expander */
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err = i2c_linuxdev_open( I2C_DEVICE, I2C_PORT_STTS751, &i2c_dev );
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if ( (err != 0) || (i2c_dev <= 0) )
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{
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printf( "ERROR: failed to open I2C device %s (err=%i)\n", I2C_DEVICE, err );
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return EXIT_FAILURE;
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}
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/* Get temperature sensor product ID */
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err = i2c_linuxdev_read( i2c_dev, I2C_PORT_STTS751, STTS751_REG_PROD_ID, &val );
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if ( err != 0 )
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{
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printf( "ERROR: failed to read I2C device %s (err=%i)\n", I2C_DEVICE, err );
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return EXIT_FAILURE;;
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}
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switch( val )
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{
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case STTS751_0_PROD_ID:
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printf("INFO: Product ID: STTS751-0\n");
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break;
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case STTS751_1_PROD_ID:
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printf("INFO: Product ID: STTS751-1\n");
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break;
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default:
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printf("ERROR: Product ID: UNKNOWN\n");
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return EXIT_FAILURE;;
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}
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/* Get temperature sensor Manufacturer ID */
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err = i2c_linuxdev_read( i2c_dev, I2C_PORT_STTS751, STTS751_REG_MAN_ID, &val );
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if ( err != 0 )
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{
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printf( "ERROR: failed to read I2C device %s (err=%i)\n", I2C_DEVICE, err );
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return EXIT_FAILURE;;
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}
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if ( val != ST_MAN_ID )
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{
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printf( "ERROR: Manufacturer ID: UNKNOWN\n" );
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return EXIT_FAILURE;;
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}
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else
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{
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printf("INFO: Manufacturer ID: 0x%02X\n", val);
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}
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/* Get temperature sensor revision number */
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err = i2c_linuxdev_read( i2c_dev, I2C_PORT_STTS751, STTS751_REG_REV_ID, &val );
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if ( err != 0 )
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{
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printf( "ERROR: failed to read I2C device %s (err=%i)\n", I2C_DEVICE, err );
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return EXIT_FAILURE;;
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}
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printf("INFO: Revision number: 0x%02X\n", val);
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/* Set conversion resolution to 12 bits */
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err = i2c_linuxdev_write( i2c_dev, I2C_PORT_STTS751, STTS751_REG_CONF, 0x8C ); /* TODO: do not hardcode the whole byte */
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if ( err != 0 )
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{
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printf( "ERROR: failed to write I2C device 0x%02X (err=%i)\n", I2C_PORT_STTS751, err );
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return EXIT_FAILURE;
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}
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/* Set conversion rate to 1 / second */
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err = i2c_linuxdev_write( i2c_dev, I2C_PORT_STTS751, STTS751_REG_RATE, 0x04 );
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if ( err != 0 )
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{
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printf( "ERROR: failed to write I2C device 0x%02X (err=%i)\n", I2C_PORT_STTS751, err );
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return EXIT_FAILURE;
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}
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while ((quit_sig != 1) && (exit_sig != 1)) {
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/* Read Temperature LSB */
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err = i2c_linuxdev_read( i2c_dev, I2C_PORT_STTS751, STTS751_REG_TEMP_L, &low_byte );
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if ( err != 0 )
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{
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printf( "ERROR: failed to read I2C device 0x%02X (err=%i)\n", I2C_PORT_STTS751, err );
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return EXIT_FAILURE;
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}
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/* Read Temperature MSB */
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err = i2c_linuxdev_read( i2c_dev, I2C_PORT_STTS751, STTS751_REG_TEMP_H, &high_byte );
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if ( err != 0 )
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{
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printf( "ERROR: failed to read I2C device 0x%02X (err=%i)\n", I2C_PORT_STTS751, err );
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return EXIT_FAILURE;
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}
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h = (int8_t)high_byte;
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temperature = ((h << 8) | low_byte) / 256.0;
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printf( "Temperature: %f C (h:0x%02X l:0x%02X)\n", temperature, high_byte, low_byte );
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wait_ms( 100 );
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}
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/* Terminate */
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printf( "+++ End of I2C test program +++\n" );
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err = i2c_linuxdev_close( i2c_dev );
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if ( err != 0 )
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{
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printf( "ERROR: failed to close I2C device (err=%i)\n", err );
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return EXIT_FAILURE;
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}
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return 0;
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}
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/* -------------------------------------------------------------------------- */
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/* --- SUBFUNCTIONS DEFINITION ---------------------------------------------- */
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static void sig_handler(int sigio) {
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if (sigio == SIGQUIT) {
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quit_sig = 1;
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} else if((sigio == SIGINT) || (sigio == SIGTERM)) {
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exit_sig = 1;
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}
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}
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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static void usage(void) {
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printf("~~~ Library version string~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
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printf(" %s\n", lgw_version_info());
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printf("~~~ Available options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
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printf(" -h print this help\n");
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printf(" -d <path> use Linux I2C device driver\n");
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printf(" => default path: " I2C_DEVICE "\n");
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}
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/* --- EOF ------------------------------------------------------------------ */
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