Can the ds18b20_device_t struct definition be moved from ds18b20.c to a header file ? (BSP-487)

[michal-olszanowski]

Related area

Component espressif/ds18b20

Hardware specification

esp32c3

Is your feature request related to a problem?

I'd like to use the ds18b20_device_hande_t type definition (the addr member) in my code, however, the struct is defined in .c and not .h:

ds18b20_device_handle_t sensor = ds18b20_sensors[i]; onewire_device_address_t address = sensor->addr;

ESP_LOGI( log_tag(), "Sensor %08" PRIx32 "%08" PRIx32 " (%s) reports %.3f°C", (uint32_t)(address >> 32), (uint32_t)address, "DS18B20", measured_temps[ i]);

The compiler is reporting:

C:/Users/m/Dev/esp/pump-driver/components/SensorService/SensorService.cpp:112:54: error: invalid use of incomplete type 'struct ds18b20_device_t' 112 | onewire_device_address_t address = sensor->addr; | ^~ In file included from C:/Users/m/Dev/esp/pump-driver/components/SensorService/SensorService.h:14, from C:/Users/m/Dev/esp/pump-driver/components/SensorService/SensorService.cpp:1: C:/Users/m/Dev/esp/pump-driver/managed_components/espressif__ds18b20/include/ds18b20.h:19:16: note: forward declaration of 'struct ds18b20_device_t' 19 | typedef struct ds18b20_device_t *ds18b20_device_handle_t; | ^~~~

Describe the solution you'd like

Add to ds18b20_types.h:

typedef struct ds18b20_device_t { onewire_bus_handle_t bus; onewire_device_address_t addr; uint8_t th_user1; uint8_t tl_user2; ds18b20_resolution_t resolution; } ds18b20_device_t;

Describe alternatives you've considered

I modifed the header locally in my project but would like to relay fully on the official ds18b20 component release. I do not know other workarounds, I'd appreciate any suggestions as an alternative.

Additional context

No response

I have checked existing list of Feature requests and the Contribution Guide

• [X] I confirm I have checked existing list of Feature requests and Contribution Guide.

[suda-morris]

@michal-olszanowski What information do you want to be exposed from the ds18b20_device_t? The address? You can get the device address from onewire_device_t::address

[michal-olszanowski]

Yes, I'm looking for the device address. Correct me if I'm wrong, but one_wire_device_t::address is only available when we are scanning the onewire bus using the onewire_device_iter_handle_t. At this point we are adding a onewire_device_t to ds18b20_device_handle_t devices[] and to make use of the device address we would need to add the device to an array of onewire_device_t devices[], which seems unnecessary, given the address is also available in ds18b20_device_t. I need an address later when we read temperatures for the devices in ds18b20_device_handle_t[].