Merge pull request #5613 from jepler/issue5418

clear out interrupt when freeing the timer

Author: tannewt

ports/raspberrypi/common-hal/rgbmatrix/RGBMatrix.c

@@ -33,6 +33,7 @@
 #include "shared-module/rgbmatrix/RGBMatrix.h"
 
 #include "src/rp2_common/hardware_pwm/include/hardware/pwm.h"
+#include "src/rp2_common/hardware_irq/include/hardware/irq.h"
 
 void *common_hal_rgbmatrix_timer_allocate(rgbmatrix_rgbmatrix_obj_t *self) {
     // Choose a PWM channel based on the first RGB pin
@@ -58,13 +59,17 @@ void common_hal_rgbmatrix_timer_enable(void *ptr) {
 void common_hal_rgbmatrix_timer_disable(void *ptr) {
     int8_t slice = ((intptr_t)ptr) & 0xff;
     pwm_set_enabled(slice, false);
+    irq_set_enabled(PWM_IRQ_WRAP, false);
+    pwm_clear_irq(slice);
 }
 
 void common_hal_rgbmatrix_timer_free(void *ptr) {
     intptr_t value = (intptr_t)ptr;
     uint8_t slice = value & 0xff;
     uint8_t channel = value >> 8;
     pwm_set_enabled(slice, false);
+    irq_set_enabled(PWM_IRQ_WRAP, false);
+    pwm_clear_irq(slice);
     pwmout_free(slice, channel);
     return;
 }