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https://github.com/espressif/arduino-esp32
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fix(xtal): Add a way to change the XTAL frequency for SparkFun ESP32 Thing (#9844)
* fix(xtal): Add a way to change the XTAL frequency Add support for boards like SparkFun ESP32 Thing that use 26MHz XTAL * ci(pre-commit): Apply automatic fixes * feat(dbg): Print the XTAL frequency in the debug report --------- Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
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@ -96,7 +96,8 @@ static void printChipInfo(void) {
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chip_report_printf(" Cores : %d\n", info.cores);
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rtc_cpu_freq_config_t conf;
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rtc_clk_cpu_freq_get_config(&conf);
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chip_report_printf(" Frequency : %lu MHz\n", conf.freq_mhz);
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chip_report_printf(" CPU Frequency : %lu MHz\n", conf.freq_mhz);
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chip_report_printf(" XTAL Frequency : %d MHz\n", rtc_clk_xtal_freq_get());
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chip_report_printf(" Embedded Flash : %s\n", (info.features & CHIP_FEATURE_EMB_FLASH) ? "Yes" : "No");
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chip_report_printf(" Embedded PSRAM : %s\n", (info.features & CHIP_FEATURE_EMB_PSRAM) ? "Yes" : "No");
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chip_report_printf(" 2.4GHz WiFi : %s\n", (info.features & CHIP_FEATURE_WIFI_BGN) ? "Yes" : "No");
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@ -252,9 +252,6 @@ extern bool btInUse();
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void initArduino() {
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//init proper ref tick value for PLL (uncomment if REF_TICK is different than 1MHz)
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//ESP_REG(APB_CTRL_PLL_TICK_CONF_REG) = APB_CLK_FREQ / REF_CLK_FREQ - 1;
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#ifdef F_CPU
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setCpuFrequencyMhz(F_CPU / 1000000);
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#endif
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#if CONFIG_SPIRAM_SUPPORT || CONFIG_SPIRAM
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psramInit();
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#endif
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@ -1,6 +1,7 @@
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_task_wdt.h"
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#include "soc/rtc.h"
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#include "Arduino.h"
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#if (ARDUINO_USB_CDC_ON_BOOT | ARDUINO_USB_MSC_ON_BOOT | ARDUINO_USB_DFU_ON_BOOT) && !ARDUINO_USB_MODE
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#include "USB.h"
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@ -78,6 +79,15 @@ void loopTask(void *pvParameters) {
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}
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extern "C" void app_main() {
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#ifdef F_XTAL_MHZ
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#if !CONFIG_IDF_TARGET_ESP32S2 // ESP32-S2 does not support rtc_clk_xtal_freq_update
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rtc_clk_xtal_freq_update((rtc_xtal_freq_t)F_XTAL_MHZ);
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rtc_clk_cpu_freq_set_xtal();
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#endif
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#endif
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#ifdef F_CPU
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setCpuFrequencyMhz(F_CPU / 1000000);
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#endif
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#if ARDUINO_USB_CDC_ON_BOOT && !ARDUINO_USB_MODE
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Serial.begin();
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#endif
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@ -3,6 +3,8 @@
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#include <stdint.h>
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#define F_XTAL_MHZ 26 //SparkFun ESP32 Thing has 26MHz Crystal
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static const uint8_t LED_BUILTIN = 5;
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#define BUILTIN_LED LED_BUILTIN // backward compatibility
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#define LED_BUILTIN LED_BUILTIN // allow testing #ifdef LED_BUILTIN
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