#include "ao.h"
+#ifndef BEEPER_CHANNEL
+#define BEEPER_CHANNEL 1
+#endif
+
void
ao_beep(uint8_t beep)
{
* is enabled and active high.
*/
+#if BEEPER_CHANNEL == 1
stm_tim3.ccmr1 = ((0 << STM_TIM234_CCMR1_OC2CE) |
(STM_TIM234_CCMR1_OC2M_FROZEN << STM_TIM234_CCMR1_OC2M) |
(0 << STM_TIM234_CCMR1_OC2PE) |
(0 << STM_TIM234_CCMR1_OC1FE) |
(STM_TIM234_CCMR1_CC1S_OUTPUT << STM_TIM234_CCMR1_CC1S));
-
stm_tim3.ccer = ((0 << STM_TIM234_CCER_CC4NP) |
(0 << STM_TIM234_CCER_CC4P) |
(0 << STM_TIM234_CCER_CC4E) |
(0 << STM_TIM234_CCER_CC1NP) |
(0 << STM_TIM234_CCER_CC1P) |
(1 << STM_TIM234_CCER_CC1E));
+#endif
+#if BEEPER_CHANNEL == 4
+ stm_tim3.ccmr2 = ((0 << STM_TIM234_CCMR2_OC4CE) |
+ (STM_TIM234_CCMR2_OC4M_TOGGLE << STM_TIM234_CCMR2_OC4M) |
+ (0 << STM_TIM234_CCMR2_OC4PE) |
+ (0 << STM_TIM234_CCMR2_OC4FE) |
+ (STM_TIM234_CCMR2_CC4S_OUTPUT << STM_TIM234_CCMR2_CC4S) |
+
+ (0 << STM_TIM234_CCMR2_OC3CE) |
+ (STM_TIM234_CCMR2_OC3M_FROZEN << STM_TIM234_CCMR2_OC3M) |
+ (0 << STM_TIM234_CCMR2_OC3PE) |
+ (0 << STM_TIM234_CCMR2_OC3FE) |
+ (STM_TIM234_CCMR2_CC3S_OUTPUT << STM_TIM234_CCMR2_CC3S));
+
+ stm_tim3.ccer = ((0 << STM_TIM234_CCER_CC4NP) |
+ (0 << STM_TIM234_CCER_CC4P) |
+ (1 << STM_TIM234_CCER_CC4E) |
+ (0 << STM_TIM234_CCER_CC3NP) |
+ (0 << STM_TIM234_CCER_CC3P) |
+ (0 << STM_TIM234_CCER_CC3E) |
+ (0 << STM_TIM234_CCER_CC2NP) |
+ (0 << STM_TIM234_CCER_CC2P) |
+ (0 << STM_TIM234_CCER_CC2E) |
+ (0 << STM_TIM234_CCER_CC1NP) |
+ (0 << STM_TIM234_CCER_CC1P) |
+ (0 << STM_TIM234_CCER_CC1E));
+#endif
/* 5. Enable the counter by setting the CEN bit in the TIMx_CR1 register. */
void
ao_beep_init(void)
{
- /* Our beeper is on PC6, which is hooked to TIM3_CH1,
- * which is on PC6
- */
+#if BEEPER_CHANNEL == 1
+ /* Our beeper is on PC6, which is hooked to TIM3_CH1.
+ */
stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOCEN);
stm_afr_set(&stm_gpioc, 6, STM_AFR_AF2);
+#endif
+#if BEEPER_CHANNEL == 4
+
+ /* Our beeper is on PB1, which is hooked to TIM3_CH4.
+ */
+ stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOBEN);
+
+ stm_afr_set(&stm_gpiob, 1, STM_AFR_AF2);
+#endif
/* Leave the timer off until requested */