CCS / MSP430G2553: MSP430G2553 with module SIM800L

Tool/software: Code Composer Studio

Hi all!

I am trying to get the MSP430G2553 to receive string and device control. But,  it's not working. Please help me!

I want to send "LED_ON" to open and send "LED_OFF" to close device.

Source code:

#include <msp430g2553.h> 
#include <string.h>
#include <stdlib.h>

/*****************define*********************************/
#define ENTER 		0x0D								//
#define SEND		0x1A								//

#define SETUP_SMS	"AT+CMGF=1"						//
#define SEND_SMS	"AT+CMGS="						//
#define my_number	"0972156484"
#define SHOW_SMS	"AT+CNMI=2,2,0,0,0"
//#define LED_ON		999
//#define LED_OFF		666

// char *string;
 char buff[30];
 //char fromsmsnumber[30];    // so dien thoai nguoi gui
 //char fromsmsdatetime[30];  // ngay gio
 char content[20];     // noi dung tin nhan  char content1[10] = "LED_ON";

int n, i, t;

//
/********************************************************/


/**********khai bao ham**********************************/
														//
														//
void uart_init(void);									//
void uart_gets(char *s);								//
char uart_getc();										//
void uart_puts(char* string);							//
void uart_putc(unsigned char data);						//


//void sim_init(void);									//
void sms_setup(void);									//
void sms_show_setup(void);								//
void sms_decode(char str[]);							//
void send_sms();


unsigned long rev = 0;
/********************************************************/





/*
 * main.c
 */

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;	// Stop watchdog timer
    BCSCTL1 = CALBC1_1MHZ;                    // Set DCO
    DCOCTL = CALDCO_1MHZ;
    uart_init();
    //sim_init();
    sms_setup();
    sms_show_setup();
    __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0, interrupts enabled

while(1){};

}

#pragma vector=USCIAB0RX_VECTOR
__interrupt void USCI0RX_ISR(void)
{

	uart_gets(buff);
	sms_decode(buff);
	//rev = atol(content);
	//if (rev == LED_ON) P2OUT|=BIT3;
	//if (rev == LED_OFF) P2OUT &=~BIT3;
	if (strcmp(content,"LED_ON")==0) P1OUT|=BIT6;
	//uart_puts(content);
	if (strcmp(content, "LED_OFF")==0) P1OUT&=~BIT6;
//	rev=0;
}
/************************noi dung ham***************************************/



void uart_init(void)
{
	P1SEL = BIT1 + BIT2 ;                     // P1.1 = RXD, P1.2=TXD
	P1SEL2 = BIT1 + BIT2 ;
	P1DIR|=BIT0+BIT6;
	P1OUT |= BIT0+BIT6;
        P1OUT &= ~BIT0+BIT6;// P1.1 = RXD, P1.2=TXD
	UCA0CTL1 |= UCSSEL_2;                     // SMCLK
	UCA0BR0 = 104;                            // 1MHz 9600,
	UCA0BR1 = 0;                              // 1MHz 9600
	UCA0MCTL = UCBRS0;                        // Modulation UCBRSx = 1
	UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
	IE2 |= UCA0RXIE;                          // Enable USCI_A0 RX interrupt
}


//ham truyen 1 ki tu
void uart_putc(unsigned char data)
{
	while (!(IFG2&UCA0TXIFG)); // Doi gui xong ki tu truoc
	UCA0TXBUF= data; // gui ki tu tiep (xuong transmit buffer)
}
// ham truyen 1 chuoi ki tu
// dung pointer de lay tung byte trong chuoi
// vi transceiver la thanh ghi 1 byte
// Co the dung mang ki tu


void uart_puts(char* string)
{
	while(*string) // lap den het chuoi ki tu
	{
		while (!(IFG2&UCA0TXIFG)); // Doi gui xong ki tu truoc
		UCA0TXBUF= *string; // gui ki tu tiep theo
		string ++; // Lay ki tu tiep theo
	}
}

//*****************************************************************************
// Wait to receive a character through UART
//*****************************************************************************


char uart_getc()
{
	while(!(IFG2&UCA0RXIFG));   // Wait until USCI_A0 RX receive a complete character
		return UCA0RXBUF; // assign RX buffer to function 's name
}

//*****************************************************************************
// Wait to receive a string through UART
// Note that the string is ended with '/0' (or 0x00)
//*****************************************************************************

void uart_gets(char *s)
{
	*s = uart_getc();
	while(*s!='#')
	{
		s++;
		*s = uart_getc();
	}
}



void uart_put_int(unsigned long n)  //Problem here
{
     unsigned char buffer[16];
     unsigned char i,j;

     if(n == 0) {
    	 uart_putc('0');
          return;
     }

     for (i = 15; i > 0 && n > 0; i--) {
          buffer[i] = (n%10)+'0';
          n /= 10;
     }

     for(j = i+1; j <= 15; j++) {
    	 uart_putc(buffer[j]);
     }
}


void sms_setup(void)
{
	__delay_cycles(1000000);
	uart_puts(SETUP_SMS);

	uart_putc(ENTER);
}

void sms_show_setup(void)
{
	__delay_cycles(10000);
	uart_puts(SHOW_SMS);
	uart_putc(ENTER);
}

void sms_decode(char str[])
{
	int n, begin,end ,i;
	int k = 0;

	n= strlen(str);

	for(i=0; i<n; i++)
	{
		if(str[i]=='*')
		{
			begin = i+1;
		}

		if(str[i]=='#')
		{
		end= i;
		}
	}

	for(i=begin;i<end; i++)
	{
		content[k]=str[i];
		k++;
	}

}