Tool/software: Code Composer Studio
How can i data display from uart into console by using system_printf (); command. Can i receive uart data into a variable?
Thanks daniel, further i have narrowed down the code. Please refer the whole code in attachment and just the important part in syntax highlighter. Still its getting stuck. In the while (1) loop i am just able to see the uart data only once and then it gets stuck, however i expect the data to be continuously coming and a dummy textarray[] data (declared and defined in attached file) to be written in sd card inputfile. That is what i want. Thanks a lot for your patience.
while(1)
{
GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);
int rxBytes = UART_read(handle, rxBuf, 200);
UART_write(handle, rxBuf, 200);
src = fopen(inputfile, "w+");
fwrite(textarray, 1, strlen(textarray), src);
fflush(src);
rewind(src);
fclose(src);
SDFatFS_close(sdfatfsHandle);
}
I am also attaching the snapshot of debugging where the program gets stuck in line
int rxBytes = UART_read(handle, rxBuf, 200); but when sd relevant code is commented then it doesnot get stuck there.
#include <file.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <third_party/fatfs/ffcio.h>
#include <ti/drivers/GPIO.h>
#include <ti/drivers/UART.h>
#include <ti/drivers/SDFatFS.h>
/* Driver configuration */
#include "ti_drivers_config.h"
/* Driver configuration */
#include "ti_drivers_config.h"
/* String conversion macro */
#define STR_(n) #n
#define STR(n) STR_(n)
/* Drive number used for FatFs */
#define DRIVE_NUM 0
const char inputfile[] = "fat:"STR(DRIVE_NUM)":input.txt";
const char outputfile[] = "fat:"STR(DRIVE_NUM)":output.txt";
const char textarray[] = \
"***********************************************************************\n"
"0 1 2 3 4 5 6 7\n"
"01234567890123456789012345678901234567890123456789012345678901234567890\n"
"This is some text to be inserted into the inputfile if there isn't\n"
"already an existing file located on the media.\n"
"If an inputfile already exists, or if the file was already once\n"
"generated, then the inputfile will NOT be modified.\n"
"***********************************************************************\n";
char fatfsPrefix[] = "fat";
/*
* ======== mainThread ========
*/
void *mainThread(void *arg0)
{
UART_Handle handle;
UART_Params params;
SDFatFS_Handle sdfatfsHandle;
FILE *src;
char rxBuf[250]; // Receive buffer
/* Call driver init functions */
GPIO_init();
UART_init();
SDFatFS_init();
/* Configure the LED pin */
GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);
add_device(fatfsPrefix, _MSA, ffcio_open, ffcio_close, ffcio_read,
ffcio_write, ffcio_lseek, ffcio_unlink, ffcio_rename);
/* Mount and register the SD Card */
sdfatfsHandle = SDFatFS_open(CONFIG_SDFatFS_0, DRIVE_NUM);
// Init UART and specify non-default parameters
UART_Params_init(¶ms);
params.baudRate = 115200;
params.writeDataMode = UART_DATA_BINARY;
// Open the UART and do the read
handle = UART_open(CONFIG_UART_0, ¶ms);
if (handle == NULL) {
/* UART_open() failed */
while (1);
}
/* Turn on user LED to indicate successful initialization */
while(1)
{
GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);
int rxBytes = UART_read(handle, rxBuf, 200);
UART_write(handle, rxBuf, 200);
src = fopen(inputfile, "w+");
fwrite(textarray, 1, strlen(textarray), src);
fflush(src);
rewind(src);
fclose(src);
SDFatFS_close(sdfatfsHandle);
}
}
/*
* ======== fatfs_getFatTime ========
*/
int32_t fatfs_getFatTime(void)
{
/*
* FatFs uses this API to get the current time in FatTime format. User's
* must implement this function based on their system's timekeeping
* mechanism. See FatFs documentation for details on FatTime format.
*/
/* Jan 1 2017 00:00:00 */
return (0x4A210000);
}
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