UART_read() is not working

Hi Jeetesh,

Just to make sure I understand you correctly, you have 4 tasks each of which open an separate UART peripheral? Are you checking the return value from UART_open() to make sure they are opening correctly? What modes did you open the UART drivers in Blocking or Callback?

Regards,
-- Emmanuel

Hi Emmanuel,

Yes i have 4 tasks for separate UART Peripherals and i checked the return value from UART_open() which is giving different value for each task...and i am using Callback mode....

UART_open() is happening in every task,.. UART_write() is also working means that it is writing to hyper-terminal but UART_read() is not reading from Hyper-terminal.(only working for com0 and not for all other three tasks ). When i debugging then i know that UART_read() is not happening.(I am using same code changing with Com port number(address)).

Regards

jeetesh

Hi Jeetesh,

Sorry for the delayed response.

What return mode and data mode are you using (UART_RETURN_FULL or UART_RETURN_NEWLINE, UART_DATA_BINARY or UART_DATA_TEXT)? Can you provide a code snip?

Regards,
-- Emmanuel

Hi Emmanuel,

I am using return mode as UART_RETURN_FULL and data mode as UART_DATA BINARY. But problem was in the windows Hyper-terminal.Actually Hyper-terminal was not releasing the data.  Moment when I disconnect the Hyper-terminal, data is flushed out. When i try with Brays Terminal, the problem gets solved.

And Thanks a lot  for giving response.

Regards

Jeetesh

 

Hiii Jeetesh/Emmanuel

I am working on uart communication between 2 SmartRF06 (CC2650) and i have connected RX to TX and TX to RX and GND to GND these r my hardware connections and i am developing my code in CCS IDE and my code is as fallow, but am unable to neither send or receive data some one please help me to solve this problem

static PIN_Handle pinHandle;

static PIN_State ModbusState;
char taskStack[TASK_STACK_SIZE];
Task_Struct taskStruct;
UART_Handle hUART;
BUFTYPE txBuf[2] = "AT";
BUFTYPE rxBuf[2];
uint16 val=0;

UART_Params params;

Semaphore_Struct semm;
Semaphore_Handle hSem;

static void uartRxCb(UART_Handle handle, void *buf, size_t count)

{
Semaphore_post(hSem);
}

void SimpleBLECentral_createTask(void)

{
Task_Params params;
// Configure task
Task_Params_init(&params);
params.stack = sbcTaskStack;
params.stackSize = SBC_TASK_STACK_SIZE;
params.priority = SBC_TASK_PRIORITY;

Task_construct(&taskStruct, SimpleBLECentral_taskFxn, &params, NULL);
}

static void SimpleBLECentral_taskFxn(UArg a0, UArg a1)

{
// Initialize application
SimpleBLECentral_init();

pinHandle = PIN_open(&ModbusState, BoardGpioInitTable);
PIN_setOutputValue(pinHandle, PIN_ID(Board_UART_TX), 1);
PIN_setOutputValue(pinHandle, PIN_ID(Board_UART_RX), 1);

UART_Params_init(&params);
params.readMode = UART_MODE_CALLBACK;
params.writeMode = UART_MODE_BLOCKING;
params.writeDataMode = UART_DATA_BINARY;
params.readDataMode = UART_DATA_BINARY;
params.readCallback = uartRxCb;
params.readEcho = UART_ECHO_OFF;
params.dataLength = UART_LEN_8;
params.stopBits = UART_STOP_ONE;
params.baudRate = 115200;

hUART = UART_open(CC2650_UART0, &params);

Semaphore_Params sParams;
Semaphore_Params_init(&sParams);
sParams.mode = Semaphore_Mode_BINARY;

Semaphore_construct(&semm, 0, &sParams);
hSem = Semaphore_handle(&semm);

for(val=0;val<1000;val++)
{
UART_write(hUART, txBuf, sizeof(txBuf));
LCD_WRITE_STRING("Message OK", LCD_PAGE4);
UART_read(hUART, &rxBuf, sizeof(rxBuf));
// UART_write(hUART, &rxBuf, sizeof(rxBuf));
}

if((strstr(rxBuf,"OK")) || (strstr(rxBuf,"ok")))
{
System_printf("AT : OK");
LCD_WRITE_STRING("Done", LCD_PAGE4);
}
else
{
System_printf("Error..,");
LCD_WRITE_STRING("Error", LCD_PAGE5);
}

but i am unable to receive at rxBuf so please let me knoe if any changes to be made in this code

Thank You

Hi Martin,

This thread has been closed. If this is still a problem, can you start a new thread ?

Thanks,
Ashish

Hii Ashish Kapania 

could u please explain me properly abt which thread your talking 

thank u 

Hi Martin,

I was referring to this forum post thread. Can you create a new thread and post your question there ?

Best,
Ashish