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stm32/boards/LEGO_HUB_NO6/cc2564: Make timer configurable.

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This adds configurable macros to define the timer and channel used to
provide the Bluetooth 32768 MHz clock.  This will allow code to be shared
with LEGO_HUB_NO7.

Signed-off-by: David Lechner <david@pybricks.com>
This commit is contained in:
David Lechner 2022-06-14 22:32:44 -05:00 committed by Damien George
parent f69af16619
commit 0f0f2351bb
1 changed files with 15 additions and 9 deletions
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24
ports/stm32/boards/LEGO_HUB_NO6/cc2564.c
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@ -38,6 +38,12 @@
#define CC2564_PIN_BT_SLOWCLK (pyb_pin_BT_SLOWCLK)
#define CC2564_PIN_BT_ENABLE (pyb_pin_BT_ENABLE)
// slight difference between LEGO_HUB_NO6 and LEGO_HUB_NO7
#ifndef CC2564_TIMER_BT_SLOWCLOCK_TIM
#define CC2564_TIMER_BT_SLOWCLOCK_TIM 8
#define CC2564_TIMER_BT_SLOWCLOCK_TIM_CH 4
#endif
STATIC void cc2564_wait_cts_low(mp_hal_pin_obj_t cts, uint32_t timeout_ms) {
for (int i = 0; i < timeout_ms; ++i) {
if (mp_hal_pin_read(cts) == 0) {
@ -53,18 +59,18 @@ int mp_bluetooth_hci_controller_init(void) {
mp_hal_pin_low(CC2564_PIN_BT_ENABLE);
// Output a 32768Hz signal on BTSLOWCLK.
// tim8 = pyb.Timer(8, freq=32768)
// tim8_ch4 = tim8.channel(4, pyb.Timer.PWM, pin=btclk)
// tim8_ch4.pulse_width_percent(50)
mp_obj_t args[6] = { MP_OBJ_NEW_SMALL_INT(8), MP_OBJ_NEW_QSTR(MP_QSTR_freq), MP_OBJ_NEW_SMALL_INT(32768), MP_OBJ_NULL };
mp_obj_t tim8 = pyb_timer_type.make_new(&pyb_timer_type, 1, 1, args);
mp_load_method(tim8, MP_QSTR_channel, args);
args[2] = MP_OBJ_NEW_SMALL_INT(4);
// tim = pyb.Timer(TIM, freq=32768)
// tim_ch = tim.channel(TIM_CH, pyb.Timer.PWM, pin=btclk)
// tim_ch.pulse_width_percent(50)
mp_obj_t args[6] = { MP_OBJ_NEW_SMALL_INT(CC2564_TIMER_BT_SLOWCLOCK_TIM), MP_OBJ_NEW_QSTR(MP_QSTR_freq), MP_OBJ_NEW_SMALL_INT(32768), MP_OBJ_NULL };
mp_obj_t tim = pyb_timer_type.make_new(&pyb_timer_type, 1, 1, args);
mp_load_method(tim, MP_QSTR_channel, args);
args[2] = MP_OBJ_NEW_SMALL_INT(CC2564_TIMER_BT_SLOWCLOCK_TIM_CH);
args[3] = MP_OBJ_NEW_SMALL_INT(0); // CHANNEL_MODE_PWM_NORMAL
args[4] = MP_OBJ_NEW_QSTR(MP_QSTR_pin);
args[5] = (mp_obj_t)CC2564_PIN_BT_SLOWCLK;
mp_obj_t tim8_ch4 = mp_call_method_n_kw(2, 1, args);
mp_load_method(tim8_ch4, MP_QSTR_pulse_width_percent, args);
mp_obj_t tim_ch = mp_call_method_n_kw(2, 1, args);
mp_load_method(tim_ch, MP_QSTR_pulse_width_percent, args);
args[2] = MP_OBJ_NEW_SMALL_INT(50);
mp_call_method_n_kw(1, 0, args);