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Merge branch 'feature/efuse_purpose_api' into 'master'

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efuse: Add an API to return the efuse descriptor for a key block's purpose field

See merge request espressif/esp-idf!8269
This commit is contained in:
Angus Gratton 2020-04-07 08:26:45 +08:00
commit 604360b98c
3 changed files with 38 additions and 3 deletions
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8
components/efuse/include/esp32s2/esp_efuse.h
View file

@ -56,6 +56,14 @@ typedef enum {
EFUSE_BLK_MAX EFUSE_BLK_MAX
} esp_efuse_block_t; } esp_efuse_block_t;
struct esp_efuse_desc_s;
/**
* @brief Given a key block in the range EFUSE_BLK_KEY0..EFUSE_BLK_KEY5, return
* efuse field for setting the key purpose
*/
const struct esp_efuse_desc_s **esp_efuse_get_purpose_field(esp_efuse_block_t block);
/** /**
* @brief Type of coding scheme * @brief Type of coding scheme
*/ */

11
components/efuse/include/esp_efuse.h
View file

@ -35,13 +35,18 @@ extern "C" {
#define ESP_ERR_CODING (ESP_ERR_EFUSE + 0x04) /*!< Error while a encoding operation. */ #define ESP_ERR_CODING (ESP_ERR_EFUSE + 0x04) /*!< Error while a encoding operation. */
/** /**
* @brief Structure eFuse field * @brief Structure eFuse field
*/ */
typedef struct { struct esp_efuse_desc_s {
esp_efuse_block_t efuse_block: 8; /**< Block of eFuse */ esp_efuse_block_t efuse_block: 8; /**< Block of eFuse */
uint8_t bit_start; /**< Start bit [0..255] */ uint8_t bit_start; /**< Start bit [0..255] */
uint16_t bit_count; /**< Length of bit field [1..-]*/ uint16_t bit_count; /**< Length of bit field [1..-]*/
} esp_efuse_desc_t; };
/**
* @brief Type definition for an eFuse field
*/
typedef struct esp_efuse_desc_s esp_efuse_desc_t;
/** /**
* @brief Reads bits from EFUSE field and writes it into an array. * @brief Reads bits from EFUSE field and writes it into an array.

22
components/efuse/src/esp32s2/esp_efuse_api.c
View file

@ -81,3 +81,25 @@ esp_efuse_coding_scheme_t esp_efuse_get_coding_scheme(esp_efuse_block_t blk)
ESP_EARLY_LOGD(TAG, "coding scheme %d", scheme); ESP_EARLY_LOGD(TAG, "coding scheme %d", scheme);
return scheme; return scheme;
} }
const esp_efuse_desc_t **esp_efuse_get_purpose_field(esp_efuse_block_t block)
{
switch(block) {
case EFUSE_BLK_KEY0:
return ESP_EFUSE_KEY_PURPOSE_0;
case EFUSE_BLK_KEY1:
return ESP_EFUSE_KEY_PURPOSE_1;
case EFUSE_BLK_KEY2:
return ESP_EFUSE_KEY_PURPOSE_2;
case EFUSE_BLK_KEY3:
return ESP_EFUSE_KEY_PURPOSE_3;
case EFUSE_BLK_KEY4:
return ESP_EFUSE_KEY_PURPOSE_4;
case EFUSE_BLK_KEY5:
return ESP_EFUSE_KEY_PURPOSE_5;
default:
return NULL;
}
}