Part Number: TM4C123GH6PM
hello , i recently bought a node mcu with esp8266 wifi module and i was trying to get it to communicate with my tiva c microcontroller , i was trying to send a simple sentence dofile("script1.lua") which should make the led on the node mcu to blink , sending this via a serial monitor using putty works on the node mcu with no issues , however using the micrcontroller with the same settings as putty doesnt work in fact when both the microcontroller and the nodemcu are connected through usb on my laptop i can see that only 2 letters are being sent , d and o the first 2 letters in my sentence nothing else is being sent , any idea what might be happening with my tiva c ?
here is the full code i am using to send the dofile like and then waiting if anything is received from the node mcu
#include "tm4c123gh6pm.h"
void UART2_Init(void);
void UART2_Send_Char(char c);
void UART2_Send_String(char *string);
char a;
int main()
{
volatile int delay=0;
UART2_Init();
for(delay=0;delay<10000;delay++);
UART2_Send_String("dofile(\"script1.lua\")\n\r");
while(1)
{
while((UART2_FR_R & (1<<4))!=0);
a=UART2_DR_R;
}
}
void UART2_Send_Char(char c)
{
while((UART2_FR_R & 0x040) != 0);
UART2_DR_R = c;
}
void UART2_Send_String(char *string)
{
while(*string)
{
UART2_Send_Char(*(string++));
}
}
void UART2_Init(void)
{
//1. Enable the UART module using the RCGCUART register (see page 342).
//enable clock 5
SYSCTL_RCGCUART_R |= 0x04;
//2. Enable the clock to the appropriate GPIO module via the RCGCGPIO register (see page 338).
//enable clock for port D
SYSCTL_RCGCGPIO_R |= 0x08;
//To find out which GPIO port to enable, refer to Table 23-5 on page 1344.
//digital enable the pins on port D
GPIO_PORTD_LOCK_R =0x4C4F434B;
GPIO_PORTD_CR_R = 0xFF;
GPIO_PORTD_DEN_R |= 0xFF;
//3. Set the GPIO AFSEL bits for the appropriate pins (see page 668). To determine which GPIOs to
//configure, see Table 23-4 on page 1337.
//alternate functions on pins PD6 and PD7 ,PD6 -> uart5 rx , PD7 -> uart5 tx
GPIO_PORTD_AFSEL_R |= 0xC0;
//5. Configure the PMCn fields in the GPIOPCTL register to assign the UART signals to the appropriate
//pins (see page 685 and Table 23-5 on page 1344).
GPIO_PORTD_PCTL_R |= 0x11000000;
//This section discusses the steps that are required to use a UART module. For this example, the
//UART clock is assumed to be 16 MHz, and the desired UART configuration is:
//1- 115200 baud rate
//2-data length 8bits
//3-one stop bit
//4-no parity
//5-no fifos
//6-no interrupts
//disable the uart3
UART2_CTL_R &=0xFE;
//get values for IBRD and FBRD from the data sheet page 900
UART2_IBRD_R = 8;
UART2_FBRD_R = 44;
//set the appropriate bits in LCRH for the configuration stated above
UART2_LCRH_R |= 0x60;
//clock source = system clock
UART2_CC_R &=00;
//enable the uart module
UART2_CTL_R |=0x301;
}
