UART ISR for K70 in MQX

akshatsaraf — Fri, 02 May 2014 04:56:16 GMT

Hello,

I use interrupt driven UART ("ittyb:") in my project and wanted to send and receive strings over the UART.

I am able to receive the string, but only one byte is transmitting from the UART, Here is my sample uart ISR

void serial_isr(void *user_isr_ptr)

{

UART_MemMapPtr sci_ptr = _bsp_get_serial_base_address (1); //DES get base address for UART5

uData = sci_ptr->S1; //DES read status register. Part of two step process to clear the interrupt flag.

uData = sci_ptr->D; //DES get the character

//printf("%c", uData);

switch(uData)

{

// Data processing...

}

In main task:

void SerialZero_Task(uint32_t initial_data)

{

serial_ptr = fopen (SERIAL_CHANNEL_ZERO, BSP_DEFAULT_IO_OPEN_MODE);

if( serial_ptr == NULL )

{

printf("Error: Unable to open IO channel\n");

_task_block();

}

param = TRUE;

result = ioctl( serial_ptr, IO_IOCTL_SERIAL_SET_FLAGS , &param );

if( MQX_OK != result )

{

_task_block();

}

result = ioctl(serial_ptr, IO_IOCTL_SERIAL_SET_BAUD, &baudrate);

if (MQX_OK != result)

{

_task_block();

}

_nvic_int_init(INT_UART1_RX_TX, 2, TRUE);

_nvic_int_enable(INT_UART1_RX_TX);

_int_install_isr(INT_UART1_RX_TX, serial_isr, serial_ptr);

while()

{ }

}

Re: UART ISR for K70 in MQX

Luis_Garabo — Fri, 02 May 2014 17:47:31 GMT

Hi Saraf,

We have an appnote that shows how to use the UART with interrupts ( ittyx: ):

http://cache.freescale.com/files/32bit/doc/app_note/AN4022.pdf

This is the source code:

http://cache.freescale.com/files/32bit/doc/app_note/AN4022SW.zip

Take special attention to the file camera_task.c, in the function Camera_Init() and snapShot()

Regards,
Garabo

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UART ISR for K70 in MQX

Re: UART ISR for K70 in MQX