esp32/machine_pwm: Add constants clock defintion.

yoann-darche · yoann-darche · commit 51f170008532 · 2024-10-29T18:26:37.000+01:00
Add MP_ROM_QSTR(MP_QSTR_PWM_AUTO_CLK) etc... to have the
constant for clock source in the python PWM object.
extmod/machine_pwm: File has been updated to
use (optionaly) the MICROPY_PY_MACHINE_PWM_CLASS_CONSTANTS
define that should hold the constants.

Signed-off-by: Yoann Darche &lt;yoannd@hotmail.com&gt;
diff --git a/extmod/machine_pwm.c b/extmod/machine_pwm.c
@@ -134,6 +134,12 @@ static const mp_rom_map_elem_t machine_pwm_locals_dict_table[] = {
     #endif
     { MP_ROM_QSTR(MP_QSTR_duty_u16), MP_ROM_PTR(&machine_pwm_duty_u16_obj) },
     { MP_ROM_QSTR(MP_QSTR_duty_ns), MP_ROM_PTR(&machine_pwm_duty_ns_obj) },
+
+    // A port must add PWM class constants defining the following macro.
+    // It can be defined to nothing if there are no constants.
+    #ifdef MICROPY_PY_MACHINE_PWM_CLASS_CONSTANTS
+    MICROPY_PY_MACHINE_PWM_CLASS_CONSTANTS
+    #endif
 };
 static MP_DEFINE_CONST_DICT(machine_pwm_locals_dict, machine_pwm_locals_dict_table);
 
diff --git a/ports/esp32/machine_pwm.c b/ports/esp32/machine_pwm.c
@@ -142,6 +142,15 @@ static const ledc_clk_cfg_t clk_source_map[] = {
     #endif
 };
 
+// MicroPython bindings for ESP32-PWM
+#define MICROPY_PY_MACHINE_PWM_CLASS_CONSTANTS \
+    { MP_ROM_QSTR(MP_QSTR_PWM_AUTO_CLK), MP_ROM_INT(PWM_AUTO_CLK) }, \
+    { MP_ROM_QSTR(MP_QSTR_PWM_APB_CLK), MP_ROM_INT(PWM_APB_CLK) }, \
+    { MP_ROM_QSTR(MP_QSTR_PWM_RC_FAST_CLK), MP_ROM_INT(PWM_RC_FAST_CLK) }, \
+    { MP_ROM_QSTR(MP_QSTR_PWM_REF_TICK), MP_ROM_INT(PWM_REF_TICK) }, \
+    { MP_ROM_QSTR(MP_QSTR_PWM_XTAL_CLK), MP_ROM_INT(PWM_XTAL_CLK) }, \
+    { MP_ROM_QSTR(MP_QSTR_PWM_PLL_CLK), MP_ROM_INT(PWM_PLL_CLK) }, \
+
 // Config of timer upon which we run all PWM'ed GPIO pins
 static bool pwm_inited = false;
 
