48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
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// Copyright 2015-2016 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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// 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 "esp_efuse.h"
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#define EFUSE_CONF_WRITE 0x5A5A /* efuse_pgm_op_ena, force no rd/wr disable */
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#define EFUSE_CONF_READ 0x5AA5 /* efuse_read_op_ena, release force */
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#define EFUSE_CMD_PGM 0x02
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#define EFUSE_CMD_READ 0x01
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void esp_efuse_burn_new_values(void)
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{
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REG_WRITE(EFUSE_CONF_REG, EFUSE_CONF_WRITE);
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REG_WRITE(EFUSE_CMD_REG, EFUSE_CMD_PGM);
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while (REG_READ(EFUSE_CMD_REG) != 0) {
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}
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REG_WRITE(EFUSE_CONF_REG, EFUSE_CONF_READ);
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REG_WRITE(EFUSE_CMD_REG, EFUSE_CMD_READ);
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while (REG_READ(EFUSE_CMD_REG) != 0) {
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}
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esp_efuse_reset();
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}
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void esp_efuse_reset(void)
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{
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REG_WRITE(EFUSE_CONF_REG, EFUSE_CONF_READ);
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const uint32_t block_start[4] = { EFUSE_BLK0_WDATA0_REG, EFUSE_BLK1_WDATA0_REG,
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EFUSE_BLK2_WDATA0_REG, EFUSE_BLK3_WDATA0_REG };
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const uint32_t block_end[4] = { EFUSE_BLK0_WDATA6_REG, EFUSE_BLK1_WDATA7_REG,
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EFUSE_BLK2_WDATA7_REG, EFUSE_BLK3_WDATA7_REG };
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for (int i = 0; i < 4; i++) {
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for (uint32_t r = block_start[i]; r <= block_end[i]; r+= 4) {
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REG_WRITE(r, 0);
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}
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}
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}
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