Kinetis Software Development KitのトピックHow do I connect a fsl_uart KSDK component in to the MQX IO layer?

How do I connect a fsl_uart KSDK component in to the MQX IO layer?

intractablesubt — Tue, 30 Sep 2014 21:16:02 GMT

I have instantiated a fsl_uart component in my FRDM-K64F project using MQX_KSDK_1.0.0 with PE. I am initializing it in a task since the "Auto Initialization" selection doesn't work (see MQX_KSDK_1.0.0 with PE and fsl_uart auto initialization). I would like to hook it in to the MQX IO layer so that it can be accessed using POSIX calls. Can anyone give an example for doing this?

Re: How do I connect a fsl_uart KSDK component in to the MQX IO layer?

intractablesubt — Wed, 01 Oct 2014 17:51:38 GMT

I have an answer that seems to work illustrated in the following code snippet:

const NIO_SERIAL_INIT_DATA_STRUCT _bsp_nserial3_init =

{

.UART_INSTANCE = FSL_UARTCOM3,

.BAUDRATE = 115228,

.PARITY_MODE = kUartParityDisabled,

.STOPBIT_COUNT = kUartOneStopBit,

.BITCOUNT_PERCHAR = kUart8BitsPerChar,

.RXTX_PRIOR = 4,

};

int fd;

char resp[10];

char *resp_ptr;

int nbytes;

_nio_dev_install("nser3:", &nio_serial_dev_fn, (void*) &_bsp_nserial3_init);

fd = open("nser3:", O_RDWR);

write(fd, "AT\r", 3);

resp_ptr = resp;

while ((nbytes = read(fd, resp_ptr, resp + sizeof(resp) - resp_ptr - 1)) > 0) {

resp_ptr += nbytes;

if (resp_ptr[-1] == '\n' || resp_ptr[-1] == '\n') {

break;

}

resp_ptr = '\0';

close(fd);

printf("%s: Modem says %s\n", __FUNCTION__, resp);

Re: How do I connect a fsl_uart KSDK component in to the MQX IO layer?

danielchen — Mon, 03 Nov 2014 06:50:47 GMT

thanks for your sharing