56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "bootloader_common.h"
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#include "bootloader_clock.h"
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#include "soc/efuse_reg.h"
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#include "soc/apb_ctrl_reg.h"
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uint8_t bootloader_common_get_chip_revision(void)
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{
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uint8_t eco_bit0, eco_bit1, eco_bit2;
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eco_bit0 = (REG_READ(EFUSE_BLK0_RDATA3_REG) & 0xF000) >> 15;
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eco_bit1 = (REG_READ(EFUSE_BLK0_RDATA5_REG) & 0x100000) >> 20;
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eco_bit2 = (REG_READ(APB_CTRL_DATE_REG) & 0x80000000) >> 31;
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uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
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uint8_t chip_ver = 0;
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switch (combine_value) {
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case 0:
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chip_ver = 0;
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break;
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case 1:
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chip_ver = 1;
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break;
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case 3:
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chip_ver = 2;
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break;
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case 7:
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chip_ver = 3;
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break;
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default:
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chip_ver = 0;
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break;
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}
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return chip_ver;
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}
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int bootloader_clock_get_rated_freq_mhz()
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{
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//Check if ESP32 is rated for a CPU frequency of 160MHz only
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if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
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REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
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return 160;
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}
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return 240;
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}
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