Other Parts Discussed in Thread: TM4C123GH6PM
#include <stdint.h>
#include <stdio.h>
#include "E:\TivaWare\inc\tm4c123gh6pm.h"
#include "tm4c123gh6pm.h"
#include <string.h>
#include <stdlib.h>
void UART0Tx(char c);
void UART0_init(void);
void UART0_puts(char* s);
void delayMs(int n);
int main(void)
{
char buffer[16];
float res;
UART0_init();
/* enable clocks */
SYSCTL_RCGCGPIO_R|=0x10;
SYSCTL_RCGCADC_R |= 1; /* enable clock to ADC0 */
// SYSCTL_RCGCWTIMER_R |=1; //enable clock to wtimer
GPIO_PORTE_AFSEL_R |=8;
GPIO_PORTE_DEN_R &=~8;
GPIO_PORTE_AMSEL_R |=8;
/* initialize ADC0 */
ADC0_ACTSS_R &= ~8; /* disable SS3 during configuration */
ADC0_EMUX_R &= ~0xF000;
// ADC0_EMUX_R|=0x5000; //for timer trigger
ADC0_SSMUX3_R = 0; /* get input from channel 0 */
ADC0_SSCTL3_R |= 6; /* take chip temperature, set flag at 1st sample */
ADC0_ACTSS_R |= 8; /* enable ADC0 sequencer 3 */
// WTIMER0_CTL_R=0;
//WTIMER0_CFG_R=0x04;
//WTIMER0_TAMR_R=0x02; //periodic mode and down-counter
//WTIMER0_TAILR_R=1600;
//WTIMER0_CTL_R|=0x20;
//WTIMER0_CTL_R|=0x01;
while(1)
{
ADC0_PSSI_R |= 8; /* start a conversion sequence 3 */
while((ADC0_RIS_R & 8) == 0) ; /* wait for conversion complete */
res = ADC0_SSFIFO3_R;
ADC0_ISC_R = 8; /* clear completion flag */
res=(res*3.3)/4095;
sprintf(buffer, "%f\r\n", res);
UART0_puts(buffer);
delayMs(1000);
}
}
void UART0_init(void)
{
SYSCTL_RCGCUART_R |= 1; /* provide clock to UART0 */
SYSCTL_RCGCGPIO_R |= 0x01; /* enable clock to GPIOA */
/* UART0 initialization */
UART0_CTL_R = 0; /* disable UART0 */
UART0_IBRD_R = 8;//104; /* 16MHz/16=1MHz, 1MHz/104=9600 baud rate */
UART0_FBRD_R = 44;//11; /* fraction part, see Example 4-4 */
UART0_CC_R = 0; /* use system clock */
UART0_LCRH_R = 0x60; /* 8-bit, no parity, 1-stop bit, no FIFO */
UART0_CTL_R = 0x301; /* enable UART0, TXE, RXE */
/* UART0 TX0 and RX0 use PA0 and PA1. Set them up. */
GPIO_PORTA_DEN_R = 0x03; /* Make PA0 and PA1 as digital */
GPIO_PORTA_AFSEL_R = 0x03; /* Use PA0,PA1 alternate function */
GPIO_PORTA_PCTL_R = 0x11; /* configure PA0 and PA1 for UART */
}
void UART0Tx(char c)
{
while((UART0_FR_R & 0x20) != 0); /* wait until Tx buffer not full */
UART0_DR_R = c; /* before giving it another byte */
}
void UART0_puts(char* s)
{
while (*s != 0) /* if not end of string */
UART0Tx(*s++); /* send the character through UART0 */
}
/* delay n milliseconds (16 MHz CPU clock) */
void delayMs(int n)
{
int32_t i, j;
for(i = 0 ; i < n; i++)
for(j = 0; j < 3180; j++)
{} /* do nothing for 1 ms */
}
