atsamr34_lorawan_lora_modulation
1.0.0
“无线变得容易！” - 将Lora点对点连接添加到现有的Lorawan应用程序
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在洛拉论坛上与您的同行互动有关此软件的互动。
基于从ASFV3生成的Lorawan Mote应用程序，该示例代码证明了Lorawan应用程序的共存以及使用LORA调制的2x ATSAMR34 XPLED PRO板之间的纯无线电通信。
有关Microchip ATSAMR34 Lora SIP设备的更多信息，请访问Microchip网页：
https://www.microchip.com/design-centers/wireless-connectivity/low-power-wide-area-networks/lora-technology/sam-r34-r35
ATSAMR34 XPLAINE PRO评估套件是一个硬件平台，用于评估ATSAMR34 Low PowerLora®Sub-GHz SIP。它由Microchip Studio 7.0 IDE支持，自3.44.0发布以来，可从高级软件框架（ASFV3）获得示例代码的集合。 Xplained Pro MCU系列评估套件包括一个嵌入式调试器（EDBG），并且不需要外部工具来编程或调试ATSAMR34。该套件提供了一套功能，使用户能够立即使用ATSAMR34低功率Lora®Sub-GHz SIP外围设备，并了解如何将设备集成在您自己的设计中。 ATSAMR34 XPLAINE PRO套件包含以下项目：
为了展示点对点交流，您确实需要至少2倍ATSAMR34 XPLE的专业板。
该项目集成了Microchip Lorawan堆栈（MLS）软件API，该软件为不同的软件模块提供了接口。
对于此应用程序，我们将“暂停” Lorawan Mac层（MAC），并使用Lorawan无线电层（TAL）进行点对点通信，并“恢复” Lorawan Mac层来执行Lorawan操作。
在对等配置中，Lorawan MAC层被绕过，并让无线电驱动无需协议，没有安全性，没有设备的唯一标识符，并且显然没有互操作性和生态系统（与Lorawan相反）。这可以证明在Lorawan应用程序中使用P2P通信的能力。
请确保不要违反相应频段的本地法规。例如，欧洲内部868MHz波段的25MW和1％的占空比。
MAC层提供了Lorawan规范中定义的操作的功能。
TAL层使用无线电驱动程序，并提供对SX1276收发器的访问权限。
为了能够设置设备的点与点连接，代码需要：
void LORAWAN_Init(AppDataCb_t appdata, JoinResponseCb_t joindata);
StackRetStatus_t LORAWAN_Reset (IsmBand_t ismBand);
uint32_t LORAWAN_Pause (void);
RadioError_t RADIO_SetAttr(RadioAttribute_t attribute, void *value);
RADIO_SetAttr(WATCHDOG_TIMEOUT,(void *)&wdt) ;
RadioError_t RADIO_Receive(RadioReceiveParam_t *param);
此函数将设备设置为接收模式，以接收数据并将其存储在“ Radio_RxHandler”任务帖子中。
RadioError_t RADIO_Transmit(RadioTransmitParam_t *param);
此功能通过将任务帖子执行到Radio_TXHandler来传输数据。
对于点对点通信，示例代码使用以下参数配置收音机：
typedef enum _AppTaskIds_t
{
DISPLAY_TASK_HANDLER,
PROCESS_TASK_HANDLER,
APP_TASKS_COUNT
}AppTaskIds_t;
typedef enum _AppTaskState_t
{
RESTORE_BAND_STATE,
DEMO_CERT_APP_STATE,
DEMO_APP_STATE,
JOIN_SEND_STATE
}AppTaskState_t;
static SYSTEM_TaskStatus_t (*appTaskHandlers[APP_TASKS_COUNT])(void) = {
/* In the order of descending priority */
displayTask,
processTask
};
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
/*********************************************************************//**
brief Calls appropriate functions based on state variables
*************************************************************************/
static SYSTEM_TaskStatus_t displayTask(void)
{
switch(appTaskState)
{
case RESTORE_BAND_STATE:
displayRunRestoreBand();
break;
case DEMO_CERT_APP_STATE:
displayRunDemoCertApp();
break;
case DEMO_APP_STATE:
displayRunDemoApp();
break;
case JOIN_SEND_STATE:
displayJoinAndSend();
break;
default:
printf("Error STATE Enteredrn");
break;
}
return SYSTEM_TASK_SUCCESS;
}
/*********************************************************************//**
brief Displays and activates LED's for joining to a network
and sending data to a network
*************************************************************************/
static void displayJoinAndSend(void)
{
printf("rn1. Send Join Requestrn");
printf("2. Send Datarn");
// new menu with p2p
printf("3. Main Menurn") ;
printf("4. MAC Pausern") ;
printf("5. MAC Resumern") ;
printf("6. Configure Radiorn") ;
printf("7. Send Radio Datarn") ;
printf("8. Enter Radio Receive modern") ;
printf("9. Exit Radio Receive modern") ;
#ifdef CONF_PMM_ENABLE
printf("0. Sleeprn") ;
#endif
printf("rnEnter your choice: ");
set_LED_data(LED_AMBER,&off);
set_LED_data(LED_GREEN,&off);
startReceiving = true;
}
/*********************************************************************//**
brief Pulls the data from UART when activated
*************************************************************************/
void serial_data_handler(void)
{
int rxChar;
char serialData;
/* verify if there was any character received*/
if (startReceiving == true)
{
if((-1) != (rxChar = sio2host_getchar_nowait()))
{
serialData = (char)rxChar;
if((serialData != 'r') && (serialData != 'n') && (serialData != 'b'))
{
startReceiving = false;
serialBuffer = rxChar;
appPostTask(PROCESS_TASK_HANDLER);
printf("rn");
}
}
}
}
/*********************************************************************//**
brief Calls appropriate functions based on state variables
*************************************************************************/
static SYSTEM_TaskStatus_t processTask(void)
{
switch(appTaskState)
{
case RESTORE_BAND_STATE:
processRunRestoreBand();
break;
case DEMO_CERT_APP_STATE:
processRunDemoCertApp();
break;
case DEMO_APP_STATE:
processRunDemoApp();
break;
case JOIN_SEND_STATE:
processJoinAndSend();
break;
default:
printf("Error STATE Enteredrn");
break;
}
return SYSTEM_TASK_SUCCESS;
}
/*********************************************************************//**
brief Sends Join request or Data to the network
*************************************************************************/
static void processJoinAndSend(void)
{
StackRetStatus_t status = LORAWAN_SUCCESS;
if(serialBuffer == '1')
{
status = LORAWAN_Join(DEMO_APP_ACTIVATION_TYPE);
if (LORAWAN_SUCCESS == (StackRetStatus_t)status)
{
set_LED_data(LED_GREEN,&on);
printf("nJoin Request Sentnr");
}
else
{
set_LED_data(LED_AMBER,&on);
print_stack_status(status);
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
}
}
else if(serialBuffer == '2' && joined == true)
{
sendData();
}
else if(serialBuffer == '2' && !joined)
{
set_LED_data(LED_AMBER,&on);
printf("Device not joined to the networkrn");
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
}
#ifdef CONF_PMM_ENABLE
else if(serialBuffer == '0')
{
static bool deviceResetsForWakeup = false;
PMM_SleepReq_t sleepReq;
/* Put the application to sleep */
sleepReq.sleepTimeMs = DEMO_CONF_DEFAULT_APP_SLEEP_TIME_MS;
sleepReq.pmmWakeupCallback = appWakeup;
sleepReq.sleep_mode = CONF_PMM_SLEEPMODE_WHEN_IDLE;
if (CONF_PMM_SLEEPMODE_WHEN_IDLE == SLEEP_MODE_STANDBY)
{
deviceResetsForWakeup = false;
}
if (true == LORAWAN_ReadyToSleep(deviceResetsForWakeup))
{
app_resources_uninit();
if (PMM_SLEEP_REQ_DENIED == PMM_Sleep(&sleepReq))
{
HAL_Radio_resources_init();
sio2host_init();
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
printf("rnsleep_not_okrn");
}
}
else
{
printf("rnsleep_not_okrn");
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
}
}
#endif
else if (serialBuffer == '3')
{
// main menu
appTaskState = DEMO_APP_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
}
else if (serialBuffer == '4')
{
// Pause the Microchip LoRaWAN Stack
uint32_t time_ms ;
time_ms = LORAWAN_Pause() ;
printf("rnMAC Pause %ldrn", time_ms) ;
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else if (serialBuffer == '5')
{
// Resume the Microchip LoRaWAN Stack
LORAWAN_Resume() ;
printf("rnMAC Resumern") ;
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else if (serialBuffer == '6')
{
// Configure Radio Parameters
// --------------------------
// Bandwidth = BW_125KHZ
// Channel frequency = FREQ_868100KHZ
// Channel frequency deviation = 25000
// CRC = enabled
// Error Coding Rate = 4/5
// IQ Inverted = disabled
// LoRa Sync Word = 0x34
// Modulation = LoRa
// PA Boost = disabled (disabled for EU , enabled for NA)
// Output Power = 1 (up to +14dBm for EU / up to +20dBm for NA)
// Spreading Factor = SF7
// Watchdog timeout = 60000
// Bandwidth
RadioLoRaBandWidth_t bw = BW_125KHZ ;
RADIO_SetAttr(BANDWIDTH, &bw) ;
printf("Configuring Radio Bandwidth: 125kHzrn") ;
// Channel Frequency
uint32_t freq = FREQ_868100KHZ ;
RADIO_SetAttr(CHANNEL_FREQUENCY, &freq) ;
printf("Configuring Channel Frequency %ldrn", freq) ;
// Channel Frequency Deviation
uint32_t fdev = 25000 ;
RADIO_SetAttr(CHANNEL_FREQUENCY_DEVIATION, &fdev) ;
printf("Configuring Channel Frequency Deviation %ldrn", fdev) ;
// CRC
uint8_t crc_state = 1 ;
RADIO_SetAttr(CRC, &crc_state) ;
printf("Configuring CRC state: %drn", crc_state) ;
// Error Coding Rate
RadioErrorCodingRate_t cr = CR_4_5 ;
RADIO_SetAttr(ERROR_CODING_RATE, &cr) ;
printf("Configuring Error Coding Rate 4/5rn") ;
// IQ Inverted
uint8_t iqi = 0 ;
RADIO_SetAttr(IQINVERTED, &iqi) ;
printf("Configuring IQ Inverted: %drn", iqi) ;
// LoRa Sync Word
uint8_t sync_word = 0x34 ;
RADIO_SetAttr(LORA_SYNC_WORD, &sync_word) ;
printf("Configuring LoRa sync word 0x%xrn", sync_word) ;
// Modulation
RadioModulation_t mod = MODULATION_LORA ;
RADIO_SetAttr(MODULATION, &mod) ;
printf("Configuring Modulation: LORArn") ;
// PA Boost
uint8_t pa_boost = 0 ;
RADIO_SetAttr(PABOOST, &pa_boost) ;
printf("Configuring PA Boost: %drn", pa_boost) ;
// Tx Output Power
int16_t outputPwr = 1 ;
RADIO_SetAttr(OUTPUT_POWER, (void *)&outputPwr) ;
printf("Configuring Radio Output Power %drn", outputPwr) ;
// Spreading Factor
int16_t sf = SF_7 ;
RADIO_SetAttr(SPREADING_FACTOR, (void *)&sf) ;
printf("Configuring Radio SF %drn", sf) ;
// Watchdog Timeout
uint32_t wdt = 60000 ;
RADIO_SetAttr(WATCHDOG_TIMEOUT, (void *)&wdt) ;
printf("Configuring Radio Watch Dog Timeout %ldrn", wdt) ;
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else if (serialBuffer == '7')
{
// Radio Transmit
// the counter value
counter++ ;
if (counter > 255) counter = 0 ;
tx_buffer[0] = counter ;
printf("Buffer transmitted: ") ;
print_array(tx_buffer, 1) ;
RadioError_t radioStatus ;
RadioTransmitParam_t radioTransmitParam ;
radioTransmitParam.bufferLen = 1 ;
radioTransmitParam.bufferPtr = (uint8_t *)&tx_buffer ;
radioStatus = RADIO_Transmit(&radioTransmitParam) ;
switch (radioStatus)
{
case ERR_NONE:
{
printf("Radio Transmit Successrn") ;
}
break ;
case ERR_DATA_SIZE:
{
// do nothing, status already set to invalid
}
break ;
default:
{
printf("Radio Busyrn") ;
}
}
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else if (serialBuffer == '8')
{
// Enter Radio Receive mode
RadioReceiveParam_t radioReceiveParam ;
uint32_t rxTimeout = 0 ; // forever
radioReceiveParam.action = RECEIVE_START ;
radioReceiveParam.rxWindowSize = rxTimeout ;
if (RADIO_Receive(&radioReceiveParam) == 0)
{
printf("Radio in Receive modern") ;
}
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else if (serialBuffer == '9')
{
// Stop Radio Receive mode
RadioReceiveParam_t radioReceiveParam ;
radioReceiveParam.action = RECEIVE_STOP ;
if (RADIO_Receive(&radioReceiveParam) == 0)
{
printf("Radio Exit Receive modern") ;
}
appTaskState = JOIN_SEND_STATE ;
appPostTask(DISPLAY_TASK_HANDLER) ;
}
else
{
set_LED_data(LED_AMBER,&on);
printf("Invalid choice enteredrn");
appTaskState = JOIN_SEND_STATE;
appPostTask(DISPLAY_TASK_HANDLER);
}
}
/* OTAA Join Parameters */
#define DEMO_DEVICE_EUI {0xde, 0xaf, 0xfa, 0xce, 0xde, 0xaf, 0xfa, 0xce}
#define DEMO_APPLICATION_EUI {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05}
#define DEMO_APPLICATION_KEY {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05}
conc_board.h文件：
/* TODO: If Board is having EDBG with DEV_EUI flashed in
Userpage Enable this Macro otherwise make it as 0 */
#define EDBG_EUI_READ 1
