forked from espressif/arduino-esp32
Initial Commit
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@ -30,6 +30,9 @@
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#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
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#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
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#include "esp32/rom/rtc.h"
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const uint32_t MHZ = 1000000;
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#elif CONFIG_IDF_TARGET_ESP32S2
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#include "esp32s2/rom/rtc.h"
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#else
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#error Target CONFIG_IDF_TARGET is not supported
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#endif
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@ -44,7 +47,6 @@ typedef struct apb_change_cb_s {
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apb_change_cb_t cb;
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} apb_change_t;
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const uint32_t MHZ = 1000000;
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static apb_change_t * apb_change_callbacks = NULL;
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static xSemaphoreHandle apb_change_lock = NULL;
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@ -153,6 +155,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
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uint32_t capb, apb;
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//Get XTAL Frequency and calculate min CPU MHz
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rtc_xtal_freq_t xtal = rtc_clk_xtal_freq_get();
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#if CONFIG_IDF_TARGET_ESP32
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if(xtal > RTC_XTAL_FREQ_AUTO){
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if(xtal < RTC_XTAL_FREQ_40M) {
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if(cpu_freq_mhz <= xtal && cpu_freq_mhz != xtal && cpu_freq_mhz != (xtal/2)){
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@ -164,6 +167,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
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return false;
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}
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}
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#endif
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if(cpu_freq_mhz > xtal && cpu_freq_mhz != 240 && cpu_freq_mhz != 160 && cpu_freq_mhz != 80){
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if(xtal >= RTC_XTAL_FREQ_40M){
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log_e("Bad frequency: %u MHz! Options are: 240, 160, 80, %u, %u and %u MHz", cpu_freq_mhz, xtal, xtal/2, xtal/4);
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@ -172,6 +176,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
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}
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return false;
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}
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#if CONFIG_IDF_TARGET_ESP32
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//check if cpu supports the frequency
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if(cpu_freq_mhz == 240){
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//Check if ESP32 is rated for a CPU frequency of 160MHz only
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@ -181,6 +186,7 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
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cpu_freq_mhz = 160;
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}
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}
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#endif
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//Get current CPU clock configuration
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rtc_clk_cpu_freq_get_config(&cconf);
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//return if frequency has not changed
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