From c3895785a268c067039ce30c0c77a8c2782c63fe Mon Sep 17 00:00:00 2001
From: Guo Wenxue <guowenxue@gmail.com>
Date: Sat, 09 Apr 2022 09:47:22 +0800
Subject: [PATCH] update tsl2561.c to fix wiringpi bug
---
modules/c/tsl2561.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 140 insertions(+), 26 deletions(-)
diff --git a/modules/c/tsl2561.c b/modules/c/tsl2561.c
index e88cd4b..33611ac 100644
--- a/modules/c/tsl2561.c
+++ b/modules/c/tsl2561.c
@@ -12,65 +12,166 @@
*
********************************************************************************/
-#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 "tsl2561.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>
+
+#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,
+};
int tsl_fd = -1;
static const int regs_addr[REG_COUNT]={DATA0LOW, DATA0HIGH, DATA1LOW, DATA1HIGH};
+#define msleep(x) usleep( 1000*(x) )
+
int tsl2561_init(void)
{
if(tsl_fd > 0)
return 0;
- tsl_fd = wiringPiI2CSetup(TSL2561_I2C_ADDR);
- if(tsl_fd < 0)
+ if( (tsl_fd=open("/dev/i2c-1", O_RDWR)) < 0)
{
- printf("TSL2561 I2C setup failure: %s\n", strerror(errno));
- }
- else
- {
- printf("TSL2561 initialise ok, tsl_fd=%d\n", tsl_fd);
+ printf("TSL2561 I2C device setup failure: %s\n", strerror(errno));
+ return -1;
}
-
+ printf("TSL2561 initialise ok, tsl_fd=%d\n", tsl_fd);
return tsl_fd;
}
+
+#define ON 1
+#define OFF 0
+
+void 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(tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ printf("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return ;
+ }
+
+
+ if( cmd )
+ msg.buf[0]=POWER_UP;
+ else
+ msg.buf[0]=POWER_DOWN;
+
+ if( ioctl(tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ printf("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return ;
+ }
+
+ return ;
+}
+
+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(tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ printf("%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(tsl_fd, I2C_RDWR, &data) < 0 )
+ {
+ printf("%s() ioctl failure: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ *regval = msg.buf[0];
+ return 0;
+}
+
int tsl2561_get_lux(void)
{
int i;
- int reg_data[REG_COUNT];
+ unsigned char reg_data[REG_COUNT];
+ unsigned char buf;
int chn0_data = 0;
int chn1_data = 0;
- double div = 0.0;
- double lux = 0.0;
-
- /* Power up TSL2561 */
- wiringPiI2CWrite(tsl_fd, CONTROL_REG);
- wiringPiI2CWrite(tsl_fd, POWER_UP);
+ float div = 0.0;
+ float lux = 0.0;
- sleep(1);
+
+ tsl2561_power(ON);
+
+ msleep(410); /* t(CONV) MAX 400ms */
/* Read register Channel0 and channel1 data from register */
for(i=0; i<REG_COUNT; i++)
{
- wiringPiI2CWrite(tsl_fd, regs_addr[i]);
- reg_data[i] = wiringPiI2CRead(tsl_fd);
- //printf("write and read register: 0x%0x->%d\n", regs_addr[i], reg_data[i]);
+ tsl2561_readreg(regs_addr[i], ®_data[i]);
}
chn0_data = reg_data[1]*256 + reg_data[0]; /* Channel0 = DATA0HIGH<<8 + DATA0LOW */
@@ -78,12 +179,11 @@
if( chn0_data<=0 || chn1_data<0 )
{
- //printf("TSL2561 get date chn0_data[%d] chn1_data[%d]\n", chn0_data, chn1_data);
lux = 0.0;
goto OUT;
}
- div = (double)chn1_data / (double)chn0_data;
+ 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);
@@ -103,10 +203,23 @@
OUT:
printf("TSLl2561 get lux: %.3f\n", lux);
- wiringPiI2CWrite(tsl_fd, CONTROL_REG);
- wiringPiI2CWrite(tsl_fd, POWER_DOWN);
+ tsl2561_power(OFF);
}
+void print_datime(void)
+{
+ time_t tmp;
+ struct tm *p;
+
+ time(&tmp);
+
+ p=localtime(&tmp);
+
+
+ printf("%d-%02d-%02d %02d:%02d:%02d\t", (p->tm_year+1900),(p->tm_mon+1),
+ p->tm_mday, p->tm_hour, p->tm_min, p->tm_sec);
+
+}
int main(int argc, char **argv)
{
@@ -121,6 +234,7 @@
while(1)
{
+ print_datime();
tsl2561_get_lux();
sleep(interval);
}
--
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