Hi,
I am evaluating TWR-K20D72M EVM board. In my scenario i want to interface the WiFi and GSM module this EVM.
So,I interfaced the GS2100MIE WiFi module with UART0 of this EVM and i send AT command sequence as per my application.
i am requesting to addressing my below listed queries,
-If i connect the WIFI module directly with uart port of TWR-K20D72M board than communication is not working.
-If i connect USB-to-UART dongle in between WIFI module and TWR-K20D72M EVM board than the communication is working fine.
I attached below code for your reference.
#################################################################################
#include "common.h"
#include "uart.h"
#include "isr.h"
#include "lptmr.h"
unsigned char data='a';
char RxCh;
static uint8 i=0;
/********************************************************************/
void uart_config(void)
{
//uart0 intialized
PORTD_PCR6 = PORT_PCR_MUX(3);//rx
PORTD_PCR7 = PORT_PCR_MUX(3);//tx
//uart_init function for set bauard rate and clock
uart_init(UART0_BASE_PTR,72000,9600);
}
void uart_app_init(void)
{
enable_irq(INT_UART0_RX_TX-16);
UART_C2_REG(UART0_BASE_PTR)|= UART_C2_RIE_MASK ; //enable RDRF interrupt
}
void main (void)
{
uart_config();
uart_app_init();
lptmr_init(0x01110,3);
enable_irq(INT_LPTimer-16);
uart_send_str("AT\r\n",UART0_BASE_PTR);
while(1);
}
void isr_uart0_tx_rx(void)
{
while (!(UART_S1_REG(UART0_BASE_PTR) & UART_S1_RDRF_MASK)); // clear RDRF flag
RxCh = UART_D_REG(UART0_BASE_PTR); // Return the 8-bit data from the receiver
printf("%c",RxCh);
}
#############################################################################################
Please let me know if you need more information from our side.
Any help in this case will be appreciated ?
Thanks,
Parth
