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Add support for 160MHz rated CPUs ()

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Some ESP32 chips are rated only to 160MHz. This change adds support for them and does not allow frequency to be switched to 240MHz
This commit is contained in:
Me No Dev 2019-09-05 12:30:43 +03:00 committed by GitHub
parent 5c04de6f39
commit 80ea521940
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 0 deletions

10
cores/esp32/esp32-hal-cpu.c

@ -23,6 +23,7 @@
#include "soc/rtc_cntl_reg.h" #include "soc/rtc_cntl_reg.h"
#include "rom/rtc.h" #include "rom/rtc.h"
#include "soc/apb_ctrl_reg.h" #include "soc/apb_ctrl_reg.h"
#include "soc/efuse_reg.h"
#include "esp32-hal.h" #include "esp32-hal.h"
#include "esp32-hal-cpu.h" #include "esp32-hal-cpu.h"
@ -150,6 +151,15 @@ bool setCpuFrequencyMhz(uint32_t cpu_freq_mhz){
} }
return false; return false;
} }
//check if cpu supports the frequency
if(cpu_freq_mhz == 240){
//Check if ESP32 is rated for a CPU frequency of 160MHz only
if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
log_e("Can not switch to 240 MHz! Chip CPU frequency rated for 160MHz.");
cpu_freq_mhz = 160;
}
}
//Get current CPU clock configuration //Get current CPU clock configuration
rtc_clk_cpu_freq_get_config(&cconf); rtc_clk_cpu_freq_get_config(&cconf);
//return if frequency has not changed //return if frequency has not changed