Debug Function

[lora-net]

Debug Function

[djaeckle]

Hi rayaan92,

the repository contains drivers for the usart. You can also find board specific hardware drivers and setup examples.

[rayaan92]

thanks, I have had a look at it and have given it a try but I can't seem to get it up and running and I need it urgently. I am working on the SK-IM880 platform, and once I try and configure the uart the code just hangs. here's a snippet of the debug code that i have written.

void debugmcu( void)

{
UartInit( &Uart1, UART_1, UART_TX, UART_RX );
UartConfig( &Uart1, RX_ONLY, 115200, UART_8_BIT, UART_1_STOP_BIT, NO_PARITY, NO_FLOW_CTRL );
}

void debugInit ( void )
{

FifoInit( &Uart1.FifoTx, TxBuffer, FIFO_TX_SIZE );

}

void debug_char(uint8_t c)
{
UartMcuPutChar( &Uart1, c);

}

void debug_str(const uint8_t* str)
{
while(_str)
{
debug_char(_str++);
}

[mluis1]

One of the issues that I see in your code example is that you configure the UART as RX_ONLY but you are trying to send data. So, you should change the debugmcu function as follows

void debugmcu( void)
{
    UartInit( &Uart1, UART_1, UART_TX, UART_RX );
    UartConfig( &Uart1, TX_ONLY, 115200, UART_8_BIT, UART_1_STOP_BIT, NO_PARITY, NO_FLOW_CTRL );
}

Most of the UART functions return status values. Those return values should be checked in order to verify that the UART peripheral is not busy performing some other operation.
In your code you initialize the transmission FIFO but, to print debug messages most of the time there is no need to do it. Using a FIFO will consume some amount of RAM memory that may be necessary for your application.

Please note also that printing debug messages on interrupt handling functions is not recommended. Print functions are quite time consuming while an interrupt handling function must be handled as quick as possible.

Please find below a simple example to perform an UART echo. I didn't test the example nor compiled it but I guess that it is correct.

int8_t welcomeStr = "Echo application. Every typed char is echoed!!!\r\n";

int main ( void )
{
    uint8_t data = 0;

    UartInit( &Uart1, UART_1, UART_TX, UART_RX );
    UartConfig( &Uart1, RX_TX, 115200, UART_8_BIT, UART_1_STOP_BIT, NO_PARITY, NO_FLOW_CTRL );

    // Print welcome message
    while( UartPutBuffer( &Uart1, welcomeStr, strlen( welcomeStr ) ) != 0 ){ };

    while( 1 )
    {
        if( UartGetChar( &Uart1, &data ) == 0 )
        {
             while( UartPutChar( &Uart1, data) != 0 ){ };
        }
    }
}

[rayaan92]

Hi Miguel,

I built the snippet code you gave me and it does npt want to build, however
i am using it as a guideline, I am currently working on the sk-im880a class
A LoRamac from you, however when I try to the uart interface the board goes
into a weird state and it seems like it just halts at that point. belong is
the snippet of my code, I do the initialization in the BoardInitMcu
function.

void BoardInitMcu( void )
{
if( McuInitialized == false )
{
// We use IRQ priority group 4 for the entire project
// When setting the IRQ, only the preemption priority is used
NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );

    // Disable Systick
    SysTick->CTRL  &= ~SysTick_CTRL_TICKINT_Msk;    // Systick IRQ off
    SCB->ICSR |= SCB_ICSR_PENDSTCLR_Msk;            // Clear SysTick

Exception pending flag

    AdcInit( &Adc, POTI );

    UartInit( &Uart1, UART_1, UART_TX, UART_RX);
    UartConfig(&Uart1, RX_TX, 115200, UART_8_BIT, UART_1_STOP_BIT,

NO_PARITY, NO_FLOW_CTRL); (once I comment this line of code out the rest of
the code executes)

    SpiInit( &SX1272.Spi, RADIO_MOSI, RADIO_MISO, RADIO_SCLK, NC );
    SX1272IoInit( );

#if( LOW_POWER_MODE_ENABLE )
TimerSetLowPowerEnable( true );

On Fri, Mar 11, 2016 at 4:59 PM, Miguel Luis [email protected]
wrote:

Closed #40 #40.

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#40 (comment).