esp32: Add initial support for ESP32S2 SoCs.

Builds against IDF v4.3-beta2.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 20 insertions, 1 deletions

diff --git a/ports/esp32/machine_timer.c b/ports/esp32/machine_timer.c
index 6e5824094..696127af7 100644
--- a/ports/esp32/machine_timer.c
+++ b/ports/esp32/machine_timer.c
@@ -30,12 +30,17 @@
 #include <stdint.h>
 #include <stdio.h>
 
-#include "driver/timer.h"
 #include "py/obj.h"
 #include "py/runtime.h"
 #include "modmachine.h"
 #include "mphalport.h"
 
+#include "driver/timer.h"
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 1, 1)
+#include "hal/timer_ll.h"
+#define HAVE_TIMER_LL (1)
+#endif
+
 #define TIMER_INTR_SEL TIMER_INTR_LEVEL
 #define TIMER_DIVIDER  8
 
@@ -127,6 +132,18 @@ STATIC void machine_timer_isr(void *self_in) {
     machine_timer_obj_t *self = self_in;
     timg_dev_t *device = self->group ? &(TIMERG1) : &(TIMERG0);
 
+    #if HAVE_TIMER_LL
+
+    #if CONFIG_IDF_TARGET_ESP32
+    device->hw_timer[self->index].update = 1;
+    #else
+    device->hw_timer[self->index].update.update = 1;
+    #endif
+    timer_ll_clear_intr_status(device, self->index);
+    timer_ll_set_alarm_enable(device, self->index, self->repeat);
+
+    #else
+
     device->hw_timer[self->index].update = 1;
     if (self->index) {
         device->int_clr_timers.t1 = 1;
@@ -135,6 +152,8 @@ STATIC void machine_timer_isr(void *self_in) {
     }
     device->hw_timer[self->index].config.alarm_en = self->repeat;
 
+    #endif
+
     mp_sched_schedule(self->callback, self);
     mp_hal_wake_main_task_from_isr();
 }