Hello again,
I'm trying to lower the power consumption of my thingy91 by turning off the serial by setting config_serial=n. Unfortunately, this causes a crash while running a program which would run fine normally. Because I turn off the serial bus I cannot see the uart to check out where it crashes. I'm running a modified version of the aws_iot sample. My best guess would be that the system crashes when the thread I defined activates with this line of code:
K_THREAD_DEFINE(lightMeter_Thread, 10000, lightmeter, NULL, NULL, NULL, 10, 0, 45000);
In this thread I also make use of I2C. Could this be a possible cause? Here is all the code from the thread:
void lightmeter(void){
//setup
printk("Starting Lightmeter Thread\n");
const struct device *i2c_dev = device_get_binding("I2C_2"); //get the device bindings from the devicetree and put them into a struct
int err;
uint8_t read_buf = 0; //Memory buffer to put a read message in.
uint8_t write_buf = whoami_Address_lightmeter; //memory buffer to put the write message in.
if (!device_is_ready(i2c_dev)) { //check weather I2C is activated in the devicetree
printk("I2C: Device is not ready.\n");//print error if not.
return;
}
uint8_t lightConfig[2];
lightConfig[0] = 0x42;
lightConfig[1] = 0b00010000;
err = i2c_write(i2c_dev, lightConfig, 2, lightmeter_Adress);
if(err != 0){
printk("I2C config write failed - err: %d\n",err);
}
write_buf = 0x42;
i2c_write_read(i2c_dev, lightmeter_Adress, &write_buf, 1, &read_buf,1);
printk("0x42 settings set: %x\n", read_buf);
lightConfig[0] = 0x41;
lightConfig[1] = 0b00101011;
err = i2c_write(i2c_dev, lightConfig, 2, lightmeter_Adress);
if(err != 0){
printk("I2C config write failed - err: %d\n",err);
}
free(lightConfig);
//loop
while(1){
cJSON *lightMeterTransmissionObject = cJSON_CreateObject();
cJSON *whoAmI = NULL;
char *Message = NULL;
uint8_t read_buf = 0; //Memory buffer to put a read message in.
uint8_t write_buf = whoami_Address_lightmeter; //memory buffer to put the write message in.
int rtrn = i2c_write_read(i2c_dev, lightmeter_Adress, &write_buf, 1, &read_buf,1); //execute the I2C write and read and put the return into an int
if (rtrn != 0){ //check to see if the transmissions have been succesfull. If not, an error will appear.
printk("Error on i2c_read, returned: 0x%x read_buffer: 0x%x\n", rtrn, read_buf);
}else if(read_buf == 0xE0){ //check the whoami value against the known value from the datasheet.
printk("who am I succes for lightmeter: 0x%x\n", read_buf);
}else{
printk("Who am I failed for lightmeter: 0x%x\n", read_buf);
}
aws_iot_disconnect();
err = lte_lc_power_off();
if(err != 0){
printk("Error during modem shutdown: %d\n", err);
}
printk("Creating JSON object\n");
whoAmI = cJSON_CreateNumber(read_buf);
printk("Created JSON number\n");
cJSON_AddItemToObject(lightMeterTransmissionObject, "WhoAmI", whoAmI);
printk("Added number to object\n");
printk("Creating measurementArray");
cJSON *measurementsArray = cJSON_CreateArray();
int measurementValues[3];
for(int i = 0; i < amount_Of_Light_Measurements_Before_Send; i++){
printk("Measurement no %d\n", i);
write_buf = 0x50;
rtrn = i2c_write_read(i2c_dev, lightmeter_Adress, &write_buf, 1, &read_buf,1);
printk("Measurement Result for R light: %d \n", read_buf);
measurementValues[0] = read_buf;
write_buf = 0x52;
rtrn = i2c_write_read(i2c_dev, lightmeter_Adress, &write_buf, 1, &read_buf,1);
printk("Measurement Result for G light: %d \n", read_buf);
measurementValues[1] = read_buf;
write_buf = 0x54;
rtrn = i2c_write_read(i2c_dev, lightmeter_Adress, &write_buf, 1, &read_buf,1);
printk("Measurement Result for B light: %d \n", read_buf);
measurementValues[2] = read_buf;
printk("Creating measurement object\n");
cJSON *measurement = cJSON_CreateObject();
printk("Creating measurement number %d\n", i);
cJSON *measurementNumber = cJSON_CreateNumber(i);
cJSON_AddItemToObject(measurement, "Measurement Number", measurementNumber);
printk("Creating Rmeasurement\n");
cJSON *Rmeasurement = cJSON_CreateNumber(measurementValues[0]);
cJSON_AddItemToObject(measurement, "Red", Rmeasurement);
printk("Creating Gmeasurement\n");
cJSON *Gmeasurement = cJSON_CreateNumber(measurementValues[1]);
cJSON_AddItemToObject(measurement, "Green", Gmeasurement);
printk("Creating Bluemeasurement\n");
cJSON *Bmeasurement = cJSON_CreateNumber(measurementValues[2]);
cJSON_AddItemToObject(measurement, "Blue", Bmeasurement);
printk("Adding item to array\n");
cJSON_AddItemToArray(measurementsArray, measurement);
#ifdef DEBUGGING
k_msleep(500);
#else
k_sleep(K_SECONDS(time_Between_Light_Measurements_Seconds));
#endif
}
cJSON_AddItemToObject(lightMeterTransmissionObject, "Measurements", measurementsArray);
printk("Printing JSON message\n");
Message = cJSON_Print(lightMeterTransmissionObject);
printk("Storing message into struct\n");
struct aws_iot_data dataToSend = {
.qos = MQTT_QOS_0_AT_MOST_ONCE,
.topic.type = AWS_IOT_SHADOW_TOPIC_UPDATE,
.ptr = Message,
.len = strlen(Message)
};
printk("%s\n", Message);
lte_lc_connect();
k_work_schedule(&connect_work, K_NO_WAIT);
while(!cloud_connected){
k_sleep(K_SECONDS(5));
}
err = aws_iot_send(&dataToSend);
if (err) {
printk("I2C, error: %d\n", err);
}
cJSON_Delete(lightMeterTransmissionObject);
cJSON_FreeString(Message);
}
}
Thanks in advance for any help. <3
