58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/** esp/phy.h
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*
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* PHY hardware management functions.
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*
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* These are not enough to configure the ESP8266 PHY by themselves
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* (yet), but they provide utilities to modify the configuration set
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* up via the SDK.
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*
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* Functions implemented here deal directly with the hardware, not the
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* SDK software layers.
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*
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* Part of esp-open-rtos
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* Copyright (C) 2016 ChefSteps, Inc
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* BSD Licensed as described in the file LICENSE
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*/
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#ifndef _ESP_PHY_H
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#define _ESP_PHY_H
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#include <esp/types.h>
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#include <common_macros.h>
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#include <stdint.h>
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typedef enum {
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BT_COEXIST_NONE,
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BT_COEXIST_USE_BT_ACTIVE,
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BT_COEXIST_USE_BT_ACTIVE_PRIORITY,
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} bt_coexist_mode_t;
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/** Override the Bluetooth Coexistence BT_ACTIVE pin setting
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taken from the phy_info structure.
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This enables other pins to be used for Bluetooth Coexistence
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signals (rather than just the two provided for by phy_info). (Note
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that not that not all pins are confirmed to work, GPIO 0 is
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confirmed not usable as the SDK configures it as the WLAN_ACTIVE
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output - even if you change the pin mode the SDK will change it
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back.)
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To change pins and have coexistence work successfully the BT
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coexistence feature must be enabled in the phy_info configuration
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(get_default_phy_info()). You can then modify the initial
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configuration by calling this function from your own user_init
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function.
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(Eventually we should be able to support enough PHY registers
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to enable coexistence without SDK support at all, but not yet.)
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This function will enable bt_active_pin & bt_priority_as GPIO
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inputs, according to the mode parameter.
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Remember that the default Bluetooth Coexistence pins will be
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configured as GPIOs by the SDK already, so you may want to
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reconfigure/re-iomux them after calling this function.
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*/
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void bt_coexist_configure(bt_coexist_mode_t mode, uint8_t bt_active_pin, uint8_t bt_priority_pin);
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#endif
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