esp32: Drop support for ESP-IDF below V5.2.0.

Specifically, remove all conditional compilation for these earlier versions
and change the idf_component.yml specifiers to require >=5.2.0.

Signed-off-by: Angus Gratton <[email protected]>

Author: projectgus

ports/esp32/README.md

@@ -28,7 +28,7 @@ manage the ESP32 microcontroller, as well as a way to manage the required
 build environment and toolchains needed to build the firmware.
 
 The ESP-IDF changes quickly and MicroPython only supports certain versions.
-Currently MicroPython supports v5.0.4, v5.0.5, v5.1.2, v5.2.0, v5.2.2, v5.3.
+Currently MicroPython supports v5.2, v5.2.2, and v5.3.
 
 To install the ESP-IDF the full instructions can be found at the
 [Espressif Getting Started guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html#installation-step-by-step).

ports/esp32/machine_dac.c

@@ -34,21 +34,13 @@
 #if MICROPY_PY_MACHINE_DAC
 
 #include "driver/gpio.h"
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
 #include "driver/dac_oneshot.h"
-#else
-#include "driver/dac.h"
-#define DAC_CHAN_0 DAC_CHANNEL_1
-#define DAC_CHAN_1 DAC_CHANNEL_2
-#endif
 
 typedef struct _mdac_obj_t {
     mp_obj_base_t base;
     gpio_num_t gpio_id;
     dac_channel_t dac_id;
-    #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
     dac_oneshot_handle_t dac_oneshot_handle;
-    #endif
 } mdac_obj_t;
 
 static mdac_obj_t mdac_obj[] = {
@@ -77,21 +69,10 @@ static mp_obj_t mdac_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
         mp_raise_ValueError(MP_ERROR_TEXT("invalid Pin for DAC"));
     }
 
-    #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
     dac_oneshot_config_t dac_oneshot_config = {.chan_id = self->dac_id};
     check_esp_err(dac_oneshot_new_channel(&dac_oneshot_config, (dac_oneshot_handle_t *)&self->dac_oneshot_handle));
     check_esp_err(dac_oneshot_output_voltage(self->dac_oneshot_handle, 0));
     return MP_OBJ_FROM_PTR(self);
-    #else
-    esp_err_t err = dac_output_enable(self->dac_id);
-    if (err == ESP_OK) {
-        err = dac_output_voltage(self->dac_id, 0);
-    }
-    if (err == ESP_OK) {
-        return MP_OBJ_FROM_PTR(self);
-    }
-    mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
-    #endif
 }
 
 static void mdac_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
@@ -106,16 +87,8 @@ static mp_obj_t mdac_write(mp_obj_t self_in, mp_obj_t value_in) {
         mp_raise_ValueError(MP_ERROR_TEXT("value out of range"));
     }
 
-    #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
     check_esp_err(dac_oneshot_output_voltage(self->dac_oneshot_handle, value));
     return mp_const_none;
-    #else
-    esp_err_t err = dac_output_voltage(self->dac_id, value);
-    if (err == ESP_OK) {
-        return mp_const_none;
-    }
-    mp_raise_ValueError(MP_ERROR_TEXT("parameter error"));
-    #endif
 }
 MP_DEFINE_CONST_FUN_OBJ_2(mdac_write_obj, mdac_write);
 

ports/esp32/machine_pwm.c

@@ -211,39 +211,6 @@ static void configure_channel(machine_pwm_obj_t *self) {
     }
 }
 
-// Temporary workaround for ledc_find_suitable_duty_resolution function only being added in IDF V5.2
-#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 2, 0)
-static uint32_t ledc_find_suitable_duty_resolution(uint32_t src_clk_freq, uint32_t timer_freq) {
-    // This implementation is based on the one used in Micropython v1.23
-
-    // Find the highest bit resolution for the requested frequency
-    unsigned int freq = src_clk_freq;
-
-    int divider = (freq + timer_freq / 2) / timer_freq; // rounded
-    if (divider == 0) {
-        divider = 1;
-    }
-    float f = (float)freq / divider; // actual frequency
-    if (f <= 1.0) {
-        f = 1.0;
-    }
-    freq = (unsigned int)roundf((float)freq / f);
-
-    unsigned int res = 0;
-    for (; freq > 1; freq >>= 1) {
-        ++res;
-    }
-    if (res == 0) {
-        res = 1;
-    } else if (res > HIGHEST_PWM_RES) {
-        // Limit resolution to HIGHEST_PWM_RES to match units of our duty
-        res = HIGHEST_PWM_RES;
-    }
-
-    return res;
-}
-#endif
-
 static void set_freq(machine_pwm_obj_t *self, unsigned int freq, ledc_timer_config_t *timer) {
     esp_err_t err;
     if (freq != timer->freq_hz) {
@@ -265,20 +232,10 @@ static void set_freq(machine_pwm_obj_t *self, unsigned int freq, ledc_timer_conf
         }
         #endif
         uint32_t src_clk_freq = 0;
-        #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
         err = esp_clk_tree_src_get_freq_hz(timer->clk_cfg, ESP_CLK_TREE_SRC_FREQ_PRECISION_CACHED, &src_clk_freq);
         if (err != ESP_OK) {
             mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("unable to query source clock frequency %d"), (int)timer->clk_cfg);
         }
-        #else
-        // Simplified fallback logic for IDF V5.0.x, for targets with APB only.
-        src_clk_freq = APB_CLK_FREQ; // 80 MHz
-        #if SOC_LEDC_SUPPORT_REF_TICK
-        if (timer->clk_cfg == LEDC_USE_REF_TICK) {
-            src_clk_freq = REF_CLK_FREQ; // 1 MHz
-        }
-        #endif // SOC_LEDC_SUPPORT_REF_TICK
-        #endif // ESP_IDF_VERSION
 
         timer->duty_resolution = ledc_find_suitable_duty_resolution(src_clk_freq, timer->freq_hz);
 

ports/esp32/machine_uart.c

@@ -399,11 +399,7 @@ static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args,
         }
         self->flowcontrol = args[ARG_flow].u_int;
     }
-    #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0)
     uint8_t uart_fifo_len = UART_HW_FIFO_LEN(self->uart_num);
-    #else
-    uint8_t uart_fifo_len = UART_FIFO_LEN;
-    #endif
     check_esp_err(uart_set_hw_flow_ctrl(self->uart_num, self->flowcontrol, uart_fifo_len - uart_fifo_len / 4));
 }
 

ports/esp32/main_esp32/idf_component.yml

@@ -2,4 +2,4 @@
 dependencies:
   espressif/mdns: "~1.1.0"
   idf:
-    version: ">=5.0.4"
+    version: ">=5.2.0"

ports/esp32/main_esp32c3/idf_component.yml

@@ -2,4 +2,4 @@
 dependencies:
   espressif/mdns: "~1.1.0"
   idf:
-    version: ">=5.0.4"
+    version: ">=5.2.0"

ports/esp32/main_esp32c6/idf_component.yml

@@ -2,4 +2,4 @@
 dependencies:
   espressif/mdns: "~1.1.0"
   idf:
-    version: ">=5.1.0"
+    version: ">=5.2.0"

ports/esp32/main_esp32s2/idf_component.yml

@@ -3,4 +3,4 @@ dependencies:
   espressif/mdns: "~1.1.0"
   espressif/esp_tinyusb: "~1.0.0"
   idf:
-    version: ">=5.0.4"
+    version: ">=5.2.0"

ports/esp32/main_esp32s3/idf_component.yml

@@ -3,4 +3,4 @@ dependencies:
   espressif/mdns: "~1.1.0"
   espressif/esp_tinyusb: "~1.0.0"
   idf:
-    version: ">=5.0.4"
+    version: ">=5.2.0"

ports/esp32/modesp32.c

@@ -53,7 +53,6 @@ static mp_obj_t esp32_wake_on_touch(const mp_obj_t wake) {
     if (machine_rtc_config.ext0_pin != -1) {
         mp_raise_ValueError(MP_ERROR_TEXT("no resources"));
     }
-    // mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("touchpad wakeup not available for this version of ESP-IDF"));
 
     machine_rtc_config.wake_on_touch = mp_obj_is_true(wake);
     return mp_const_none;