altos: Force beep timer regs reload when enabling beeper

Without this, there can be a long delay between asking for the beeper
and having it actually start sounding.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/stm/ao_beep_stm.c b/src/stm/ao_beep_stm.c
index 37c30e25b1374e3d791a1a131fd7c4686ae24031..4761fbfc87d5fbf8f05bc0a48364a0a47e8e15eb 100644 (file)
--- a/src/stm/ao_beep_stm.c
+++ b/src/stm/ao_beep_stm.c
@@ -26,15 +26,6 @@ ao_beep(uint8_t beep)
        } else {
                stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_TIM3EN);
 
-               stm_tim3.cr1 = ((STM_TIM234_CR1_CKD_1 << STM_TIM234_CR1_CKD) |
-                               (0 << STM_TIM234_CR1_ARPE) |
-                               (STM_TIM234_CR1_CMS_EDGE << STM_TIM234_CR1_CMS) |
-                               (0 << STM_TIM234_CR1_DIR) |
-                               (0 << STM_TIM234_CR1_OPM) |
-                               (0 << STM_TIM234_CR1_URS) |
-                               (0 << STM_TIM234_CR1_UDIS) |
-                               (0 << STM_TIM234_CR1_CEN));
-
                stm_tim3.cr2 = ((0 << STM_TIM234_CR2_TI1S) |
                                (STM_TIM234_CR2_MMS_RESET << STM_TIM234_CR2_MMS) |
                                (0 << STM_TIM234_CR2_CCDS));
@@ -102,6 +93,9 @@ ao_beep(uint8_t beep)
                                (0 << STM_TIM234_CR1_URS) |
                                (0 << STM_TIM234_CR1_UDIS) |
                                (1 << STM_TIM234_CR1_CEN));
+
+               /* Update the values */
+               stm_tim3.egr = (1 << STM_TIM234_EGR_UG);
        }
 }