SIMPLELINK-CC2640R2-SDK: SIMPLELINK-CC2640R2-SDK UART

VAIBHAV BANSAL

Intellectual 420 points

Part Number: SIMPLELINK-CC2640R2-SDK

Sorry for this silly question. I had configured UART in simple link observer file.

I am ble to transmit data but I can't enable receive interrupt.

I did the following things but reading your UART.h file

void uart_receive_interrupt(UART_Handle handle, void *buf, size_t count); // Function Prototype

// UART Setup

UART_init();
UART_Params_init(&uartParams);
uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_TEXT;
uartParams.readReturnMode = UART_RETURN_NEWLINE;
uartParams.readEcho = UART_ECHO_ON;
uartParams.baudRate = 115200;
uartParams.readCallback = uart_receive_interrupt;
uartParams.readMode = UART_MODE_CALLBACK;
GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);
uart = UART_open(Board_UART0, &uartParams);

if (uart == NULL) {
/* UART_open() failed */
GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
while (1);
}

void uart_receive_interrupt(UART_Handle handle, void *buf, size_t count) // function declaration.
{
GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
UART_write(uart,"test\r\n",6);
}

I had gone through your docs folder which contain the documents for UART and other drivers but it has some functions that are not defined in your UART.h file. I found it strange.

I need the suggestion of what setting I did wrong and what should be done.

I am using "REALTERM SOFTWARE" as serial terminal for getting and sending data over UART. (other parameters such as stop bit, parity check, baudrate are set as defined in UART initialization).

over 4 years ago

0 Marie H over 4 years ago

TI__Guru 73221 points

Hi Vaibhav,

Are you using UART for display as well? (This is the default setting for the simple observer project.)

0 VAIBHAV BANSAL over 4 years ago in reply to Marie H

Intellectual 420 points

Hi Marie

No, I had removed all the display functionality and line of code from the file. I am using UART only. My main purpose is to enable UART Rx interrupt for my project. For testing I am using TTL to USB converter and get all data to my LAPTOP on Serial Terminal. From terminal itself I am sending data to BLE MCU on RX pin. But UART RX Interrupt Callback function doesn't execute.

Thanks
Vaibhav Bansal

0 Eirik V over 4 years ago in reply to VAIBHAV BANSAL

TI__Guru 56590 points

What if you try binary mode instead of text mode for read?
uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_TEXT;

0 Eirik V over 4 years ago in reply to Eirik V

TI__Guru 56590 points

Also, Since the user's callback may be called in the context of an ISR, the callback function must not make any RTOS blocking calls as you have done in uart_receive_interrupt(). Please refer to this old example (based on old sdk/device) for the general concept:
e2e.ti.com/.../1437104

You can also refer to UART callback mode in the NPI implementation in HostTest project as a reference. Specifically, the npi_tl.c & npi_tl_uart.c files.

0 Eirik V over 4 years ago in reply to Eirik V

TI__Guru 56590 points

Also refer to the UARTCC26XX.h File Reference, Not Supported Functionality section that states UART_DATA_TEXT is not supported:
dev.ti.com/.../node

There are good examples in that same doxygen documentation.

0 VAIBHAV BANSAL over 4 years ago in reply to Eirik V

Intellectual 420 points

What if you try binary mode instead of text mode for read?
uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_TEXT;

I tried but it didn't work as well.

0 VAIBHAV BANSAL over 4 years ago in reply to VAIBHAV BANSAL

Intellectual 420 points

Hi

I made the changes as follows after reading those """ npi_tl.c & npi_tl_uart.c files.""""

I had compare y settings with them and didn't found any much difference still I made changes. Please find the CODE below

void initialize_uart(uint32_t baudrate)
{
const char echoPrompt[] = "UART_INITIALIZED,";

UART_init();
UART_Params_init(&uartParams);

uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_BINARY;
uartParams.readReturnMode = UART_RETURN_NEWLINE;
uartParams.readEcho = UART_ECHO_OFF;
uartParams.baudRate = baudrate;
uartParams.readCallback = uart_receive_interrupt;
uartParams.readMode = UART_MODE_CALLBACK;
GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

GPIO_setConfig(Board_GPIO_LED0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);
uart = UART_open(Board_UART0, &uartParams);
UART_control(uart, UARTCC26XX_CMD_RETURN_PARTIAL_ENABLE, NULL);
if (uart == NULL) {
/* UART_open() failed */
GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
while (1);
}
UART_write(uart, echoPrompt, 17);
GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
}

void uart_receive_interrupt(UART_Handle handle, void *buf, size_t count)
{
ICall_CSState key;
key = ICall_enterCriticalSection();

GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);
UART_write(uart,"test\r\n",6);

ICall_leaveCriticalSection(key);
}

But Still Interrupt Function not called when I send data on RX of UART0.

Rest I had also gone through the question link you had provided but it doesn't much fruitful.

*Note:- All these settings are done in simple observer.c file not in main.c file.

Thanks
Vaibhav

0 Eirik V over 4 years ago in reply to VAIBHAV BANSAL

TI__Guru 56590 points

Please refer to UARTCC26XX.h in the doxygen documentation:
dev.ti.com/.../node

There is example code there you can refer to.

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SIMPLELINK-CC2640R2-SDK: SIMPLELINK-CC2640R2-SDK UART