From 88f6121fabaa6b7b17a2d78a52ebef2ddda16104 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Sat, 23 Jan 2021 23:14:43 +0800
Subject: [PATCH] add LUX sensor tsl2561 support in lightd
---
lightd/hal/hal.c | 8 +
lightd/hal/tsl2561.c | 192 ++++++++++++++++++++++++++++++++++++++
lightd/hal/tsl2561.h | 41 ++++++++
3 files changed, 241 insertions(+), 0 deletions(-)
diff --git a/lightd/hal/hal.c b/lightd/hal/hal.c
index 25ac288..4428bb6 100644
--- a/lightd/hal/hal.c
+++ b/lightd/hal/hal.c
@@ -12,6 +12,7 @@
********************************************************************************/
#include "lylib/logger.h"
+#include "tsl2561.h"
#include "hal.h"
#define RPI_GPIONAME "gpiochip0"
@@ -63,6 +64,13 @@
{
s_infrared_lines = gpiod_chip_get_line(s_chip, ctx->infrared_pin);
gpiod_line_request_rising_edge_events(s_infrared_lines, "infrared");
+ log_err("infrared GPIO input lines request for rising edge event ok\n");
+ }
+
+ if( tsl2561_init()< 0 )
+ {
+ log_err("LUX sensor TSL2561 initialise failure\n");
+ return -2;
}
diff --git a/lightd/hal/tsl2561.c b/lightd/hal/tsl2561.c
new file mode 100644
index 0000000..3aaf087
--- /dev/null
+++ b/lightd/hal/tsl2561.c
@@ -0,0 +1,192 @@
+/*********************************************************************************
+ * Copyright: (C) 2019 LingYun IoT System Studio
+ * All rights reserved.
+ *
+ * Filename: tsl2561.c
+ * Description: This file is the Lux sensor TSL2561 API functions on RaspberryPi,
+ * which connected to I2C-1
+ *
+ * Version: 1.0.0(04/07/19)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "04/07/19 17:39:38"
+ *
+ ********************************************************************************/
+
+#include <wiringPi.h>
+#include <wiringPiI2C.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <math.h>
+#include <errno.h>
+#include <time.h>
+
+#include <sys/ioctl.h>
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "lylib/logger.h"
+#include "lylib/util_time.h"
+#include "tsl2561.h"
+
+int s_tsl_fd = -1;
+
+static const int regs_addr[REG_COUNT]={DATA0LOW, DATA0HIGH, DATA1LOW, DATA1HIGH};
+
+int tsl2561_init(void)
+{
+ if(s_tsl_fd > 0)
+ return 0;
+
+ if( (s_tsl_fd=open("/dev/i2c-1", O_RDWR)) < 0)
+ {
+ log_err("TSL2561 I2C device setup failure: %s\n", strerror(errno));
+ return -1;
+ }
+
+ log_nrml("TSL2561 initialise ok, s_tsl_fd=%d\n", s_tsl_fd);
+ return s_tsl_fd;
+}
+
+#define ON 1
+#define OFF 0
+
+int tsl2561_power(int cmd)
+{
+ struct i2c_msg msg;
+ struct i2c_rdwr_ioctl_data data;
+ unsigned char buf[2];
+
+ msg.addr= TSL2561_I2C_ADDR;
+ msg.flags=0; /* write */
+ msg.len= 1;
+ msg.buf= buf;
+
+ data.nmsgs= 1;
+ data.msgs= &msg;
+
+ msg.buf[0]=CONTROL_REG;
+ if( ioctl(s_tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ log_err("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+
+ if( cmd )
+ msg.buf[0]=POWER_UP;
+ else
+ msg.buf[0]=POWER_DOWN;
+
+ if( ioctl(s_tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ log_err("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+int tsl2561_readreg(unsigned char regaddr, unsigned char *regval)
+{
+ struct i2c_msg msg;
+ struct i2c_rdwr_ioctl_data data;
+ unsigned char buf[2];
+
+ msg.addr= TSL2561_I2C_ADDR;
+ msg.flags=0; /* write */
+ msg.len= 1;
+ msg.buf= buf;
+ msg.buf[0] = regaddr;
+
+ data.nmsgs= 1;
+ data.msgs= &msg;
+
+ if( ioctl(s_tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ log_err("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ memset(buf, 0, sizeof(buf));
+
+ msg.addr= TSL2561_I2C_ADDR;
+ msg.flags=I2C_M_RD; /* read */
+ msg.len= 1;
+ msg.buf= buf;
+
+ data.nmsgs= 1;
+ data.msgs= &msg;
+
+ if( ioctl(s_tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ log_err("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ *regval = msg.buf[0];
+ return 0;
+}
+
+
+
+float tsl2561_get_lux(void)
+{
+ int i;
+ unsigned char reg_data[REG_COUNT];
+ unsigned char buf;
+
+ int chn0_data = 0;
+ int chn1_data = 0;
+
+ float div = 0.0;
+ float lux = 0.0;
+
+
+ tsl2561_power(ON);
+
+ msleep(410); /* t(CONV) MAX 400ms */
+
+ /* Read register Channel0 and channel1 data from register */
+ for(i=0; i<REG_COUNT; i++)
+ {
+ tsl2561_readreg(regs_addr[i], ®_data[i]);
+ }
+
+ chn0_data = reg_data[1]*256 + reg_data[0]; /* Channel0 = DATA0HIGH<<8 + DATA0LOW */
+ chn1_data = reg_data[3]*256 + reg_data[2]; /* channel1 = DATA1HIGH<<8 + DATA1LOW */
+
+ if( chn0_data<=0 || chn1_data<0 )
+ {
+ lux = 0.0;
+ goto OUT;
+ }
+
+ div = (float)chn1_data / (float)chn0_data;
+
+ if( div>0 && div<=0.5 )
+ lux = 0.304*chn0_data-0.062*chn0_data*pow(div,1.4);
+
+ else if( div>0.5 && div<=0.61 )
+ lux = 0.0224*chn0_data-0.031*chn1_data;
+
+ else if( div>0.61 && div<=0.8 )
+ lux = 0.0128*chn0_data-0.0153*chn1_data;
+
+ else if( div>0.8 && div<=1.3 )
+ lux = 0.00146*chn0_data-0.00112*chn1_data;
+
+ else if( div>1.3 )
+ lux = 0.0;
+
+ log_dbg("TSLl2561 get lux: %.3f\n", lux);
+
+OUT:
+ tsl2561_power(OFF);
+}
+
+
diff --git a/lightd/hal/tsl2561.h b/lightd/hal/tsl2561.h
new file mode 100644
index 0000000..1b912a4
--- /dev/null
+++ b/lightd/hal/tsl2561.h
@@ -0,0 +1,41 @@
+/********************************************************************************
+ * Copyright: (C) 2019 LingYun IoT System Studio
+ * All rights reserved.
+ *
+ * Filename: tsl2561.h
+ * Description: This head file is the Lux sensor TSL2561 API functions on RaspberryPi
+ *
+ * Version: 1.0.0(04/07/19)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "04/07/19 17:42:35"
+ *
+ ********************************************************************************/
+
+#ifndef _TSL2561_H_
+#define _TSL2561_H_
+
+#define TSL2561_I2C_ADDR 0x39
+
+#define CONTROL_REG 0x80
+#define REG_COUNT 4
+
+#define POWER_UP 0x03
+#define POWER_DOWN 0x00
+
+/* Register Address */
+enum
+{
+ /* Channel_0 = DATA0HIGH<<8 + DATA0LOW */
+ DATA0LOW = 0x8C,
+ DATA0HIGH,
+
+ /* Channel_1 = DATA1HIGH<<8 + DATA1LOW */
+ DATA1LOW,
+ DATA1HIGH,
+};
+
+extern int tsl2561_init(void);
+extern float tsl2561_get_lux(void);
+
+#endif /* ----- #ifndef _TSL2561_H_ ----- */
+
--
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