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Refactor 2904 descriptor

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* General code cleanup.
* Added method `NimBLECharacteristic::create2904` which will specifically create a CPF(0x2904) descriptor.
This commit is contained in:
h2zero 2024-11-29 18:14:51 -07:00 committed by h2zero
parent 47c3cd5b84
commit b4fe046c56
5 changed files with 59 additions and 60 deletions
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2
examples/Advanced/NimBLE_Server/main/main.cpp
View file

@ -195,7 +195,7 @@ void app_main(void) {
* and sizes. However we must cast the returned reference to the correct type as the method
* only returns a pointer to the base NimBLEDescriptor class.
*/
NimBLE2904* pBeef2904 = (NimBLE2904*)pBeefCharacteristic->createDescriptor("2904");
NimBLE2904* pBeef2904 = pBeefCharacteristic->create2904();
pBeef2904->setFormat(NimBLE2904::FORMAT_UTF8);
pBeef2904->setCallbacks(&dscCallbacks);

45
src/NimBLE2904.cpp
View file

@ -15,68 +15,57 @@
#include "nimconfig.h"
#if defined(CONFIG_BT_ENABLED) && defined(CONFIG_BT_NIMBLE_ROLE_PERIPHERAL)
#include "NimBLE2904.h"
NimBLE2904::NimBLE2904(NimBLECharacteristic* pCharacteristic)
: NimBLEDescriptor(NimBLEUUID((uint16_t) 0x2904),
BLE_GATT_CHR_F_READ,
sizeof(BLE2904_Data),
pCharacteristic)
{
m_data.m_format = 0;
m_data.m_exponent = 0;
m_data.m_namespace = 1; // 1 = Bluetooth SIG Assigned Numbers
m_data.m_unit = 0;
m_data.m_description = 0;
setValue((uint8_t*) &m_data, sizeof(m_data));
} // BLE2904
# include "NimBLE2904.h"
NimBLE2904::NimBLE2904(NimBLECharacteristic* pChr)
: NimBLEDescriptor(NimBLEUUID((uint16_t)0x2904), BLE_GATT_CHR_F_READ, sizeof(NimBLE2904Data), pChr) {
setValue(m_data);
} // NimBLE2904
/**
* @brief Set the description.
* @param [in] description The description value to set.
*/
void NimBLE2904::setDescription(uint16_t description) {
m_data.m_description = description;
setValue((uint8_t*) &m_data, sizeof(m_data));
}
setValue(m_data);
} // setDescription
/**
* @brief Set the exponent.
* @param [in] exponent The exponent value to set.
*/
void NimBLE2904::setExponent(int8_t exponent) {
m_data.m_exponent = exponent;
setValue((uint8_t*) &m_data, sizeof(m_data));
setValue(m_data);
} // setExponent
/**
* @brief Set the format.
* @param [in] format The format value to set.
*/
void NimBLE2904::setFormat(uint8_t format) {
m_data.m_format = format;
setValue((uint8_t*) &m_data, sizeof(m_data));
setValue(m_data);
} // setFormat
/**
* @brief Set the namespace.
* @param [in] namespace_value The namespace value toset.
*/
void NimBLE2904::setNamespace(uint8_t namespace_value) {
m_data.m_namespace = namespace_value;
setValue((uint8_t*) &m_data, sizeof(m_data));
setValue(m_data);
} // setNamespace
/**
* @brief Set the units for this value. It should be one of the encoded values defined here:
* https://www.bluetooth.com/specifications/assigned-numbers/units
* @brief Set the units for this value.
* @param [in] unit The type of units of this characteristic as defined by assigned numbers.
* @details See https://www.bluetooth.com/specifications/assigned-numbers/units
*/
void NimBLE2904::setUnit(uint16_t unit) {
m_data.m_unit = unit;
setValue((uint8_t*) &m_data, sizeof(m_data));
setValue(m_data);
} // setUnit
#endif /* CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL */

38
src/NimBLE2904.h
View file

@ -12,31 +12,30 @@
* Author: kolban
*/
#ifndef MAIN_NIMBLE2904_H_
#define MAIN_NIMBLE2904_H_
#ifndef NIMBLE_CPP_2904_H_
#define NIMBLE_CPP_2904_H_
#include "nimconfig.h"
#if defined(CONFIG_BT_ENABLED) && defined(CONFIG_BT_NIMBLE_ROLE_PERIPHERAL)
#include "NimBLEDescriptor.h"
struct BLE2904_Data {
uint8_t m_format;
int8_t m_exponent;
uint16_t m_unit; // See https://www.bluetooth.com/specifications/assigned-numbers/units
uint8_t m_namespace;
uint16_t m_description;
# include "NimBLEDescriptor.h"
struct NimBLE2904Data {
uint8_t m_format{0};
int8_t m_exponent{0};
uint16_t m_unit{0x2700}; // Unitless; See https://www.bluetooth.com/specifications/assigned-numbers/units
uint8_t m_namespace{1}; // 1 = Bluetooth SIG Assigned Numbers
uint16_t m_description{0}; // unknown description
} __attribute__((packed));
/**
* @brief Descriptor for Characteristic Presentation Format.
*
* This is a convenience descriptor for the Characteristic Presentation Format which has a UUID of 0x2904.
*/
class NimBLE2904: public NimBLEDescriptor {
public:
NimBLE2904(NimBLECharacteristic* pCharacterisitic = nullptr);
class NimBLE2904 : public NimBLEDescriptor {
public:
NimBLE2904(NimBLECharacteristic* pChr = nullptr);
static const uint8_t FORMAT_BOOLEAN = 1;
static const uint8_t FORMAT_UINT2 = 2;
static const uint8_t FORMAT_UINT4 = 3;
@ -64,6 +63,7 @@ public:
static const uint8_t FORMAT_UTF8 = 25;
static const uint8_t FORMAT_UTF16 = 26;
static const uint8_t FORMAT_OPAQUE = 27;
static const uint8_t FORMAT_MEDASN1 = 28;
void setDescription(uint16_t);
void setExponent(int8_t exponent);
@ -71,10 +71,10 @@ public:
void setNamespace(uint8_t namespace_value);
void setUnit(uint16_t unit);
private:
private:
friend class NimBLECharacteristic;
BLE2904_Data m_data;
}; // BLE2904
NimBLE2904Data m_data{};
}; // NimBLE2904
#endif /* CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL */
#endif /* MAIN_NIMBLE2904_H_ */
#endif // CONFIG_BT_ENABLED && CONFIG_BT_NIMBLE_ROLE_PERIPHERAL
#endif // NIMBLE_CPP_2904_H_

15
src/NimBLECharacteristic.cpp
View file

@ -72,8 +72,9 @@ NimBLEDescriptor* NimBLECharacteristic::createDescriptor(const char* uuid, uint3
*/
NimBLEDescriptor* NimBLECharacteristic::createDescriptor(const NimBLEUUID& uuid, uint32_t properties, uint16_t maxLen) {
NimBLEDescriptor* pDescriptor = nullptr;
if (uuid == NimBLEUUID(uint16_t(0x2904))) {
pDescriptor = new NimBLE2904(this);
if (uuid == NimBLEUUID(static_cast<uint16_t>(0x2904))) {
NIMBLE_LOGW(LOG_TAG, "0x2904 descriptor should be created with create2904()");
pDescriptor = create2904();
} else {
pDescriptor = new NimBLEDescriptor(uuid, properties, maxLen, this);
}
@ -82,6 +83,16 @@ NimBLEDescriptor* NimBLECharacteristic::createDescriptor(const NimBLEUUID& uuid,
return pDescriptor;
} // createDescriptor
/**
* @brief Create a Characteristic Presentation Format Descriptor for this characteristic.
* @return A pointer to a NimBLE2904 descriptor.
*/
NimBLE2904* NimBLECharacteristic::create2904() {
NimBLE2904* pDescriptor = new NimBLE2904(this);
addDescriptor(pDescriptor);
return pDescriptor;
} // create2904
/**
* @brief Add a descriptor to the characteristic.
* @param [in] pDescriptor A pointer to the descriptor to add.

19
src/NimBLECharacteristic.h
View file

@ -17,14 +17,12 @@
#if defined(CONFIG_BT_ENABLED) && defined(CONFIG_BT_NIMBLE_ROLE_PERIPHERAL)
class NimBLECharacteristicCallbacks;
class NimBLEService;
class NimBLECharacteristic;
class NimBLEDescriptor;
class NimBLE2904;
# include "NimBLELocalValueAttribute.h"
# include "NimBLEServer.h"
# include "NimBLEService.h"
# include "NimBLEDescriptor.h"
# include "NimBLEAttValue.h"
# include "NimBLEConnInfo.h"
# include <string>
# include <vector>
@ -39,11 +37,11 @@ class NimBLECharacteristic : public NimBLELocalValueAttribute {
public:
NimBLECharacteristic(const char* uuid,
uint16_t properties = NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN,
NimBLEService* pService = nullptr);
NimBLECharacteristic(const NimBLEUUID& uuid,
uint16_t properties = NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN,
NimBLEService* pService = nullptr);
~NimBLECharacteristic();
@ -60,10 +58,11 @@ class NimBLECharacteristic : public NimBLELocalValueAttribute {
NimBLEDescriptor* createDescriptor(const char* uuid,
uint32_t properties = NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN);
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN);
NimBLEDescriptor* createDescriptor(const NimBLEUUID& uuid,
uint32_t properties = NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE,
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN);
uint16_t maxLen = BLE_ATT_ATTR_MAX_LEN);
NimBLE2904* create2904();
NimBLEDescriptor* getDescriptorByUUID(const char* uuid) const;
NimBLEDescriptor* getDescriptorByUUID(const NimBLEUUID& uuid) const;
NimBLEDescriptor* getDescriptorByHandle(uint16_t handle) const;
@ -127,7 +126,7 @@ class NimBLECharacteristic : public NimBLELocalValueAttribute {
bool sendValue(const uint8_t* value,
size_t length,
bool is_notification = true,
uint16_t connHandle = BLE_HS_CONN_HANDLE_NONE) const;
uint16_t connHandle = BLE_HS_CONN_HANDLE_NONE) const;
NimBLECharacteristicCallbacks* m_pCallbacks{nullptr};
NimBLEService* m_pService{nullptr};