how to use the printf function in S32DS.3.5 ?

Gama — Wed, 13 Sep 2023 08:45:52 GMT

Hi nxp community,

I want to use the printf funcrtion in S32S.3.5 but i con't see results "hello world" at the console or terminal. so far i can not see results whenever i run the code. is there a special configuration required to use this function ? i am using the GBD SEGGER J-Link Debugging line and SWD.

#S32DS #printf @jiri_kral

Re: how to use the printf function in S32DS.3.5 ?

jiri_kral — Wed, 13 Sep 2023 09:54:18 GMT

Hi,

easiest way is enable semihosting console. Anyway, what's your target device and debugger?

Re: how to use the printf function in S32DS.3.5 ?

Gama — Wed, 13 Sep 2023 10:43:45 GMT

My target device is S32K144 and I am using a GBD SEGGER J-Link Debugging line to SWD.

I have enable semihosting as you suggested but no print showing .

here

after build and flash no results .

Re: how to use the printf function in S32DS.3.5 ?

jiri_kral — Wed, 13 Sep 2023 10:50:20 GMT

Did you switched to semihosting console? On your screenshot is shown debugger console:

Re: how to use the printf function in S32DS.3.5 ?

Gama — Thu, 14 Sep 2023 03:03:36 GMT

I have switch to the console but no results yet. just to let you know I'm using a JTAG 20pin connection.

Re: how to use the printf function in S32DS.3.5 ?

Gama — Thu, 14 Sep 2023 10:16:01 GMT

@jiri_kral sorry for so many questions, I'm really new to the S32D IDE.

I want to try using the UART port instead since for the printf, because I want to send messages over UART for my project. I have a USB serial on my board, I want to try the [S32K1 AUTOSAR 4.4 RTD 1.0.1 D2202 Example Projects] example name is [Uart_Example_S32K144]. But so far I have some issues with the Port_ci_Port_lp_Cfg files. I can't change the PIN based on my board. I want to use Pin PTC6 as RX and Pin PTC7 as Tx. But I'm having problems as shown below..How can I change the pins? or what am I missing?

Which of the following headers can I use to configure the Pins

/* User includes */

#include "Mcl.h"

#include "Mcu.h"

#include "Uart.h"

#include "Port.h"

#include "Platform.h"

#include "Lpuart_Uart_Ip_Irq.h"

#include "Flexio_Uart_Ip_Irq.h"

#include "check_example.h"

#include <string.h>

Bellow Is my example main.c code.

"''''''''''''''''''''''''''''''''''''''''''''''

/* User includes */

#include "Mcl.h"

#include "Mcu.h"

#include "Uart.h"

#include "Port.h"

#include "Platform.h"

#include "Lpuart_Uart_Ip_Irq.h"

#include "Flexio_Uart_Ip_Irq.h"

#include "check_example.h"

#include <string.h>

#include "stdio.h"

#define UART_LPUART_INTERNAL_CHANNEL 0U

#define UART_FLEXIO_RX_CHANNEL 1U

#define UART_FLEXIO_TX_CHANNEL 2U

/* Welcome messages displayed at the console */

#define WELCOME_MSG_1 "Hello, This message is sent via Uart!\r\n"

#define WELCOME_MSG_2 "Have a nice day!\r\n"

/* Error message displayed at the console, in case data is received erroneously */

#define ERROR_MSG "An error occurred! The application will stop!\r\n"

/* Length of the message to be received from the console */

#define MSG_LEN 50U

boolean User_Str_Cmp(const uint8 * pBuffer1, const uint8 * pBuffer2, const uint32 length)

{

uint32 idx = 0;

for (idx = 0; idx < length; idx++)

{

if(pBuffer1[idx] != pBuffer2[idx])

{

return FALSE;

}

return TRUE;

}

Std_ReturnType Send_Data(uint8 transChannel, uint8 recvChannel, const uint8* pBuffer, uint32 length)

{

volatile Std_ReturnType T_Uart_Status;

volatile Uart_StatusType Uart_ReceiveStatus = UART_STATUS_TIMEOUT;

volatile Uart_StatusType Uart_TransmitStatus = UART_STATUS_TIMEOUT;

uint32 T_bytesRemaining;

uint32 T_timeout = 0xFFFFFF;

uint8 Rx_Buffer[MSG_LEN];

/* Uart_AsyncReceive transmit data */

T_Uart_Status = Uart_AsyncReceive(recvChannel, Rx_Buffer, length);

if (E_OK != T_Uart_Status)

{

return E_NOT_OK;

}

/* Uart_AsyncSend transmit data */

T_Uart_Status = Uart_AsyncSend(transChannel, pBuffer, length);

if (E_OK != T_Uart_Status)

{

return E_NOT_OK;

}

/* Check for no on-going transmission */

{

Uart_TransmitStatus = Uart_GetStatus(transChannel, &T_bytesRemaining, UART_SEND);

} while (UART_STATUS_NO_ERROR != Uart_TransmitStatus && 0 < T_timeout--);

T_timeout = 0xFFFFFF;

{

Uart_ReceiveStatus = Uart_GetStatus(recvChannel, &T_bytesRemaining, UART_RECEIVE);

} while (UART_STATUS_NO_ERROR != Uart_ReceiveStatus && 0 < T_timeout--);

if ((UART_STATUS_NO_ERROR != Uart_TransmitStatus) || (UART_STATUS_NO_ERROR != Uart_ReceiveStatus))

{

return E_NOT_OK;

}

if(User_Str_Cmp(pBuffer, (const uint8 *)Rx_Buffer, length) == FALSE)

{

return E_NOT_OK;

}

return E_OK;

}

/*!

\brief The main function for the project.

\details The startup initialization sequence is the following:

* - startup asm routine

* - main()

int main(void)

{

printf("hello world! \n ");

volatile Std_ReturnType T_Uart_Status1;

volatile Std_ReturnType T_Uart_Status2;

/* Initialize the Mcu driver */

Mcu_Init(NULL_PTR);

Mcu_InitClock(McuClockSettingConfig_0);

#if (MCU_NO_PLL == STD_OFF)

while ( MCU_PLL_LOCKED != Mcu_GetPllStatus() )

{

/* Busy wait until the System PLL is locked */

}

Mcu_DistributePllClock();

#endif

Mcu_SetMode(McuModeSettingConf_0);

/* Initialize Mcl module */

Mcl_Init(NULL_PTR);

/* Initialize all pins using the Port driver */

Port_Init(NULL_PTR);

/* Initialize IRQs */

Platform_Init(NULL_PTR);

Platform_InstallIrqHandler(LPUART0_RxTx_IRQn, LPUART_UART_IP_0_IRQHandler, NULL_PTR);

Platform_InstallIrqHandler(FLEXIO_IRQn, MCL_FLEXIO_ISR, NULL_PTR);

/* Initializes an UART driver*/

Uart_Init(NULL_PTR);

/* Send greeting string 1 from Flexio_0_Tx to Lpuart_0 */

T_Uart_Status1 = Send_Data(UART_FLEXIO_TX_CHANNEL, UART_LPUART_INTERNAL_CHANNEL, (const uint8 *)WELCOME_MSG_1, strlen(WELCOME_MSG_1));

/* Send greeting string 2 from Lpuart_0 to Flexio_1_Rx */

T_Uart_Status2 = Send_Data(UART_LPUART_INTERNAL_CHANNEL, UART_FLEXIO_RX_CHANNEL, (const uint8 *)WELCOME_MSG_2, strlen(WELCOME_MSG_2));

Uart_Deinit();

Mcl_DeInit();

Exit_Example((T_Uart_Status1 == E_OK) && (T_Uart_Status2 == E_OK));

return (0U);

}

/** @} */

''''''''''''''''''''''''''''''''''''''''''''

Re: how to use the printf function in S32DS.3.5 ?

jiri_kral — Tue, 19 Sep 2023 11:19:00 GMT

Hi,

you need to implement the _write function which is called by printf at the end for example like this:

int _write(int file, char *ptr, int len)
{
    int i;
    file = file;
    for (i = 0; i < len; i++)
    {
        UART_PutByte(*ptr++);
    }
    return len;
}

Instead UART_PutByte you can use something like UART_Send(buffer,len), but the implementation is up to you. You can re-use uart send code from an existing RTD example.

Anyway, the STD C printf is pretty complex and even for "hello word" message it uses a lot of instructions. In my opinion - If you like to send some simple status/log messages it is better implement your own print which directly sends buffer into uart.

S32KのトピックRe: how to use the printf function in S32DS.3.5 ?

how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?

Re: how to use the printf function in S32DS.3.5 ?