Maxim Integrated
Timer based PWM output for MAX32630FTHR platform
This library provides PWM output using the MAX32630 32-bit timers.
The mbed PwmOut API implementation uses the MAX32630 Pulse Train peripherals.
The table below contains the available GPIO pins that can be connected to the six 32-bit timers (TMR0-5). Timer 0 is used for the microsecond ticker API and is not available for PWM output. Timer 5 is used by the BLE API and will not be available for PWM output if the BLE API is used.
| Timer | GPIO Port and Pin |
| TMR1 | P3_1, P5_3 |
| TMR2 | P2_4, P3_2, P4_0, P5_4 |
| TMR3 | P2_5, P3_3, P5_5 |
| TMR4 | P2_6, P3_4, P5_0, P5_6 |
| TMR5 | P3_5, P5_1 |
Note GPIO P2_4, P2_5 and P2_6 are connected to onboard LEDs 1, 2 and 3.
Diff: MAX32630FTHR_PwmOut.h
- Revision:
- 3:717258c64304
- Parent:
- 2:77d9bb2fa44e
- Child:
- 4:bd1c27ca31e8
--- a/MAX32630FTHR_PwmOut.h Fri Apr 20 17:40:46 2018 +0000
+++ b/MAX32630FTHR_PwmOut.h Fri Apr 20 22:36:02 2018 +0000
@@ -38,32 +38,36 @@
* not be available for PWM output if the BLE API is used.
*
* Timer | GPIO Port and Pin<br>
- * TMR1 | P3_1, P5_3<br>
- * TMR2 | P3_2, P4_0, P5_4<br>
- * TMR3 | P3_3, P5_5<br>
- * TMR4 | P3_4, P5_0, P5_6<br>
- * TMR5 | P3_5, P5_1<br>
+ * TMR1 | P3_1, P5_3<br>
+ * TMR2 | P2_4, P3_2, P4_0, P5_4<br>
+ * TMR3 | P2_5, P3_3, P5_5<br>
+ * TMR4 | P2_6, P3_4, P5_0, P5_6<br>
+ * TMR5 | P3_5, P5_1<br>
+ *
+ * Note GPIO P2_4, P2_5 and P2_6 are connected to onboard LEDs 1, 2 and 3.
*
* @code
* #include "mbed.h"
* #include "MAX32630FTHR_PwmOut.h"
- *
- * DigitalOut led(LED1, LED_OFF);
- * MAX32630FTHR_PwmOut servo(P3_4);
- *
+ *
+ * MAX32630FTHR_PwmOut led[] = {
+ * MAX32630FTHR_PwmOut(LED1),
+ * MAX32630FTHR_PwmOut(LED2),
+ * MAX32630FTHR_PwmOut(LED3)
+ * };
+ *
* int main()
* {
+ * float dc;
+ * unsigned int idx = 0;
+ *
* while (1) {
- * led = !led;
- * for (float pw = 0.000f; pw <= 1.000f; pw += 0.001f) {
- * servo.write(pw);
- * wait_ms(100);
+ * for (dc = 0.0f; dc <= 1.0f; dc += 0.01f) {
+ * led[idx % 3].write(dc);
+ * led[(idx + 1) % 3].write(1.0f - dc);
+ * wait_ms(20);
* }
- * led = !led;
- * for (float pw = 1.000f; pw >= 0.000f; pw -= 0.001f) {
- * servo = pw;
- * wait_ms(100);
- * }
+ * idx++;
* }
* }
* @endcode