Moin,
kann mir jmd von euch mit meiner PWM-Initialisierung weiterhelfen? Bis
jetzt sehe ich leider noch kein PWM-Signal an meinem LPC1758 Prozessor.
Das ist meine Initialiszierung.
1 | /* Enable PWM1 block */
|
2 | LPC_SC->PCONP |= (1<<6);
|
3 |
|
4 | /* Configure PWM1_PCLK to CCLK(72MHz), default value is CCLK/4 */
|
5 | LPC_SC->PCLKSEL0 &= ~(3 << 12);
|
6 | LPC_SC->PCLKSEL0 |= (3 << 12); /* PWM1_PCLK=CCLK/8 */
|
7 | /* 0 = CCLK/4 | 1 = CCLK | 2 = CCLK/2 | 3 = CCLK/8 */
|
8 |
|
9 | /* Configure PWM1.6 pin (out-enable pin) */
|
10 | LPC_PINCON->PINSEL3 &= ~(3UL << 20);
|
11 | LPC_PINCON->PINSEL3 |= (2UL << 20); /* P1.26: PWM1.6 */
|
12 |
|
13 | /* Configure Pinmode: neither pull-up nor pull-down -> open-drain output */
|
14 | LPC_PINCON->PINMODE3 &= ~(3UL << 20);
|
15 | LPC_PINCON->PINMODE3 |= (2UL << 20);
|
16 |
|
17 |
|
18 | LPC_PWM1->TCR = (1<<1); //--- Reset counter
|
19 | LPC_PWM1->PR = 0;
|
20 | LPC_PWM1->PC = 0;
|
21 |
|
22 | LPC_PWM1->MR0 = 1000; //--- test period
|
23 | LPC_PWM1->MR1 = 800;
|
24 | LPC_PWM1->MR2 = 700;
|
25 | LPC_PWM1->MR6 = 500; //--- test period/2
|
26 | LPC_PWM1->MCR = (1<<1);
|
27 |
|
28 | LPC_PWM1->TCR |= (1<<0)|(1<<3); // enable PWM
|
29 | LPC_PWM1->PCR |= (1<<14); //--- PWM1.6 output
|
Gruß
Lars
