Hi everyone;
I am beginner in ARM programming and I try to send a message via UART1 module in FRDM KL25Z board. For this job, I writed following code for Uart configuration in Uvison:
SIM->SCGC5 |= (1UL << 9)|(1UL << 10) | (1UL << 12)|(1UL << 11)|(1UL << 13); /* Enable Clock to Port B ,c,A& D,E */
SIM->SCGC5|=1UL<<5; // TSI clock
SIM->SCGC4|=1UL<<11 |1UL<<7; //UART1 clock
SIM->SOPT5|=(1UL<<17) ;
SIM->SCGC4|= 1UL<<11;
PORTB->PCR[18] = (1UL << 8); /* Pin PTB18 is GPIO */
PORTB->PCR[19] = (1UL << 8); /* Pin PTB19 is GPIO */
PORTD->PCR[1] = (1UL << 8); /* Pin PTD1 is GPIO */
FPTB->PDOR = (led_mask[0] |
led_mask[1] ); /* switch Red/Green LED off */
FPTB->PDDR = (led_mask[0] |
led_mask[1] ); /* enable PTB18/19 as Output */
FPTD->PDOR = led_mask[2]; /* switch Blue LED off */
FPTD->PDDR = led_mask[2]; /* enable PTD1 as Output */
//port d
PORTD->PCR[5]= (1UL << 8);
// PORTC->PCR[4]|=(1UL<<10);
///UART Configuration
UART1->C2=0; //Transmitter disable
UART1->BDL=156; //Baud Rate
PORTE->PCR[0]=1UL<<9 | 1UL<<8; //Select Uart tx pin PTE[0]
PORTE->PCR[0] = PORT_PCR_ISF_MASK|PORT_PCR_MUX(0x3);
PORTA->PCR[15] = PORT_PCR_ISF_MASK|PORT_PCR_MUX(0x3);
PORTC->PCR[4]=PORT_PCR_ISF_MASK|PORT_PCR_MUX(0x3);
UART1->C2=1UL<<3; //Transmitter Enable
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According to reference manual the Tx port is initially high,however ,when I tried my code there is no signal in PTE[0}. I could not understand where my mistake is . Please ,show my mistake
Thanks for your care
