CC2640修改Profile实现蓝牙发送回传

只看该作者 · 2020-2-2 11:11

CC2640修改Simple GATT Profile Service

通过修改特征值Characteristic 4，实现手机使用Ble软件发送字符串命令给开发板，开发板收到对应命令后，也发送对应字符串给手机。

Declaration总是属性的值之前，描述了价值属性是否可以读取或写入

首先找到simple_gatt_profile.c文件，找到

// Simple Profile Characteristic 4 Properties

static uint8 simpleProfileChar4Props = GATT_PROP_NOTIFY;

修改成

// Simple Profile Characteristic 4 Properties

static uint8 simpleProfileChar4Props = GATT_PROP_WRITE | GATT_PROP_NOTIFY;

这样，在手机端就可以看到Characteristic 4能够写入字符

然后修改

// Characteristic 4 Value

static uint8 simpleProfileChar4 = 0;

成

// Characteristic 4 Value

static uint8 simpleProfileChar4[20] = {0};

这里改成20个长度的数组，（20长度对于输入普通命令基本够用，对于更长的长度，理论上应该支持到256，但我并没有尝试）

然后修改属性表Profile Attributes – Table

// Characteristic Value 4

{

{ ATT_BT_UUID_SIZE, simpleProfilechar4UUID },

0,

0,

&simpleProfileChar4

},

改成

// Characteristic Value 4

{

{ ATT_BT_UUID_SIZE, simpleProfilechar4UUID },

GATT_PERMIT_READ | GATT_PERMIT_WRITE,//增加读写属性

0,

simpleProfileChar4

},

然后修改 SimpleProfile_SetParameter函数中的判断添加和赋值

case SIMPLEPROFILE_CHAR4:

if ( len == sizeof ( uint8 ) )

{

simpleProfileChar4 = *((uint8*)value);

// See if Notification has been enabled

GATTServApp_ProcessCharCfg( simpleProfileChar4Config, &simpleProfileChar4, FALSE,

simpleProfileAttrTbl, GATT_NUM_ATTRS( simpleProfileAttrTbl ),

INVALID_TASK_ID, simpleProfile_ReadAttrCB );

}

成

case SIMPLEPROFILE_CHAR4:

//if ( len == sizeof ( uint8 ) )

if ( len <= 20)

{

//simpleProfileChar4 = *((uint8*)value);

memcpy(simpleProfileChar4,value,20);

// See if Notification has been enabled

GATTServApp_ProcessCharCfg( simpleProfileChar4Config, simpleProfileChar4, FALSE,

simpleProfileAttrTbl, GATT_NUM_ATTRS( simpleProfileAttrTbl ),

INVALID_TASK_ID, simpleProfile_ReadAttrCB );

}

只看该作者 · 2020-2-2 11:11

然后修改SimpleProfile_GetParameter函数中的 case SIMPLEPROFILE_CHAR4:

case SIMPLEPROFILE_CHAR4:

*((uint8*)value) = simpleProfileChar4;

break;

成

case SIMPLEPROFILE_CHAR4:

//*((uint8*)value) = simpleProfileChar4;

memcpy(value,simpleProfileChar4,20);

break;

然后在 simpleProfile_ReadAttrCB函数中增加 case SIMPLEPROFILE_CHAR4_UUID:

case SIMPLEPROFILE_CHAR1_UUID:

case SIMPLEPROFILE_CHAR2_UUID:

case SIMPLEPROFILE_CHAR4_UUID:

*pLen = 1;

pValue[0] = *pAttr->pValue;

break;

成

//case SIMPLEPROFILE_CHAR1_UUID:

//case SIMPLEPROFILE_CHAR2_UUID:

case SIMPLEPROFILE_CHAR4_UUID:

*pLen = 20;

//pValue[0] = *pAttr->pValue;

memcpy(pValue,pAttr->pValue,20);

break;

修改 simpleProfile_WriteAttrCB函数添加

case SIMPLEPROFILE_CHAR1_UUID:

case SIMPLEPROFILE_CHAR3_UUID:

成

case SIMPLEPROFILE_CHAR1_UUID:

case SIMPLEPROFILE_CHAR3_UUID:

case SIMPLEPROFILE_CHAR4_UUID:

修改

if ( offset == 0 )

{

if ( len != 1 )

{

status = ATT_ERR_INVALID_VALUE_SIZE;

}

}

成

if ( offset == 0 )

{

if ( len > 20 )

{

status = ATT_ERR_INVALID_VALUE_SIZE;

}

}

只看该作者 · 2020-2-2 11:12

修改

//Write the value

if ( status == SUCCESS )

{

uint8 *pCurValue = (uint8 *)pAttr->pValue;

*pCurValue = pValue[0];

if( pAttr->pValue == &simpleProfileChar1 )

{

notifyApp = SIMPLEPROFILE_CHAR1;

}

else

{

notifyApp = SIMPLEPROFILE_CHAR3;

}

}

break;

成

//Write the value

if ( status == SUCCESS )

{

uint8 *pCurValue = (uint8 *)pAttr->pValue;

//*pCurValue = pValue[0];

memcpy(pCurValue,pValue,20);

notifyApp = SIMPLEPROFILE_CHAR4;

}

break;

只看该作者 · 2020-2-2 11:13

//------------------------------------------------------

修改特征值初始化

{

uint8_t charValue1 = 1;

uint8_t charValue2 = 2;

uint8_t charValue3 = 3;

uint8_t charValue4 = 4;

uint8_t charValue5[SIMPLEPROFILE_CHAR5_LEN] = { 1, 2, 3, 4, 5 };

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR1, sizeof(uint8_t),

&charValue1);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR2, sizeof(uint8_t),

&charValue2);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR3, sizeof(uint8_t),

&charValue3);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR4, sizeof(uint8_t),

&charValue4);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR5, SIMPLEPROFILE_CHAR5_LEN,

charValue5);

}

成

{

uint8_t charValue1 = 1;

uint8_t charValue2 = 2;

uint8_t charValue3 = 3;

uint8_t charValue4[20] = {0};

uint8_t charValue5[SIMPLEPROFILE_CHAR5_LEN] = { 1, 2, 3, 4, 5 };

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR1, sizeof(uint8_t),

&charValue1);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR2, sizeof(uint8_t),

&charValue2);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR3, sizeof(uint8_t),

&charValue3);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR4, 20,

charValue4);

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR5, SIMPLEPROFILE_CHAR5_LEN,

charValue5);

}

当手机蓝牙连接以后，发送字符串将会回调用SimplePeripheral_processCharValueChangeEvt函数

修改

static void SimplePeripheral_processCharValueChangeEvt(uint8_t paramId)

{

uint8_t newValue;

switch(paramId)

{

case SIMPLEPROFILE_CHAR1:

SimpleProfile_GetParameter(SIMPLEPROFILE_CHAR1, &newValue);

Display_printf(dispHandle, SP_ROW_STATUS_1, 0, "Char 1: %d", (uint16_t)newValue);

break;

case SIMPLEPROFILE_CHAR3:

SimpleProfile_GetParameter(SIMPLEPROFILE_CHAR3, &newValue);

Display_printf(dispHandle, SP_ROW_STATUS_1, 0, "Char 3: %d", (uint16_t)newValue);

break;

default:

// should not reach here!

break;

}

}

成

static void SimplePeripheral_processCharValueChangeEvt(uint8_t paramId)

{

uint8_t newValue[20] = {0};

switch(paramId)

{

case SIMPLEPROFILE_CHAR4:

SimpleProfile_GetParameter(SIMPLEPROFILE_CHAR4, newValue);

Display_printf(dispHandle, 20, 0, "Char 4: %s", (char *)newValue);

// If the RPA has changed, update the display

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR4, sizeof(newValue), newValue);

//Display_printf(dispHandle, MR_ROW_CHARSTAT, 0, "Char 3: %d", (uint16_t)newValue);

break;

default:

// should not reach here!

break;

}

}

其中 SimpleProfile_GetParameter获取手机端接收到字符串

SimpleProfile_SetParameter发送字符串到手机端（手机端需要打开notify，最多单次调用该函数4次）

函数SimplePeripheral_performPeriodicTask其中的内容可以全部注释掉

static void SimplePeripheral_performPeriodicTask(void)

{

#if 0

uint8_t valueToCopy;

// Call to retrieve the value of the third characteristic in the profile

if (SimpleProfile_GetParameter(SIMPLEPROFILE_CHAR3, &valueToCopy) == SUCCESS)

{

// Call to set that value of the fourth characteristic in the profile.

// Note that if notifications of the fourth characteristic have been

// enabled by a GATT client device, then a notification will be sent

// every time this function is called.

SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR4, sizeof(uint8_t),

&valueToCopy);

}

#endif

}

该函数默认每3秒执行一次

只看该作者 · 2020-3-1 10:56

非常感谢楼主分享

只看该作者 · 2020-3-1 11:04

非常感谢楼主分享

只看该作者 · 2020-3-1 11:11

非常感谢楼主分享

只看该作者 · 2020-3-1 11:15

非常感谢楼主分享

只看该作者 · 2020-3-1 11:22

非常感谢楼主分享

CC2640修改Profile实现蓝牙发送回传

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