From 74222910631d9fd5faa4f8795311d8c56a27e1c4 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Wed, 03 Nov 2021 23:11:45 +0800
Subject: [PATCH] remove wirepi tsl2561 code
---
modules/c/tsl2561.c | 142 ++++++++++++++++++++++++++++++++++++++++-------
1 files changed, 120 insertions(+), 22 deletions(-)
diff --git a/modules/c/tsl2561.c b/modules/c/tsl2561.c
index 9263fb6..3884671 100644
--- a/modules/c/tsl2561.c
+++ b/modules/c/tsl2561.c
@@ -22,7 +22,32 @@
#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;
@@ -34,44 +59,119 @@
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;
+ float div = 0.0;
+ float lux = 0.0;
+
- /* Power up TSL2561 */
- wiringPiI2CWrite(tsl_fd, CONTROL_REG);
- wiringPiI2CWrite(tsl_fd, POWER_UP);
+ tsl2561_power(ON);
delay(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 */
@@ -79,12 +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);
@@ -104,8 +203,7 @@
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)
--
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