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samples: tmp116: Add access to eeprom

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Add read access to internal tmp116 eeprom which
contains the device unique id after manufacturing

Signed-off-by: Guillaume Lager <g.lager@innoseis.com>
This commit is contained in:
Guillaume Lager 2021-08-30 12:05:24 +02:00 • committed by Maureen Helm
commit ed68ef5678
3 changed files with 32 additions and 3 deletions
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9
samples/sensor/tmp116/boards/nucleo_f401re.overlay
View file

@ -10,6 +10,15 @@
compatible = "ti,tmp116"; compatible = "ti,tmp116";
reg = <0x4B>; reg = <0x4B>;
label = "TMP116"; label = "TMP116";
#address-cells = <1>;
#size-cells = <0>;
eeprom: ti_tmp116_eeprom@0 {
compatible = "ti,tmp116-eeprom";
reg = <0x0>;
label = "TMP116_EEPROM";
read-only;
};
}; };
}; };

4
samples/sensor/tmp116/prj.conf
View file

@ -1,4 +1,8 @@
CONFIG_STDOUT_CONSOLE=y CONFIG_STDOUT_CONSOLE=y
CONFIG_I2C=y CONFIG_I2C=y
CONFIG_SENSOR=y CONFIG_SENSOR=y
CONFIG_SENSOR_INIT_PRIORITY=90
CONFIG_TMP116=y CONFIG_TMP116=y
CONFIG_EEPROM=y
CONFIG_EEPROM_INIT_PRIORITY=91
CONFIG_EEPROM_TMP116=y

22
samples/sensor/tmp116/src/main.c
View file

@ -7,12 +7,17 @@
#include <zephyr.h> #include <zephyr.h>
#include <device.h> #include <device.h>
#include <drivers/sensor.h> #include <drivers/sensor.h>
#include <drivers/eeprom.h>
#include <drivers/sensor/tmp116.h>
#include <sys/printk.h> #include <sys/printk.h>
#include <sys/__assert.h> #include <sys/__assert.h>
static uint8_t eeprom_content[EEPROM_TMP116_SIZE];
void main(void) void main(void)
{ {
const struct device *dev; const struct device *dev = DEVICE_DT_GET(DT_INST(0, ti_tmp116));
const struct device *eeprom = DEVICE_DT_GET(DT_INST(0, ti_tmp116_eeprom));
struct sensor_value temp_value; struct sensor_value temp_value;
/* offset to be added to the temperature /* offset to be added to the temperature
@ -21,11 +26,22 @@ void main(void)
struct sensor_value offset_value; struct sensor_value offset_value;
int ret; int ret;
dev = device_get_binding(DT_LABEL(DT_INST(0, ti_tmp116))); __ASSERT(device_is_ready(dev), "TMP116 device not ready");
__ASSERT(dev != NULL, "Failed to get TMP116 device binding"); __ASSERT(device_is_ready(eeprom), "TMP116 eeprom device not ready");
printk("Device %s - %p is ready\n", dev->name, dev); printk("Device %s - %p is ready\n", dev->name, dev);
ret = eeprom_read(eeprom, 0, eeprom_content, sizeof(eeprom_content));
if (ret == 0) {
printk("eeprom content %02x%02x%02x%02x%02x%02x%02x%02x\n",
eeprom_content[0], eeprom_content[1],
eeprom_content[2], eeprom_content[3],
eeprom_content[4], eeprom_content[5],
eeprom_content[6], eeprom_content[7]);
} else {
printk("Failed to get eeprom content\n");
}
/* /*
* if an offset of 2.5 oC is to be added, * if an offset of 2.5 oC is to be added,
* set val1 = 2 and val2 = 500000. * set val1 = 2 and val2 = 500000.