mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
0ad3017df7
1. move btif and A2DP source code from project directory to bluetooth directory; 2. some updates of audio source code;
351 lines
11 KiB
C
351 lines
11 KiB
C
/*
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* ESPRSSIF MIT License
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*
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* Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
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*
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* Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP32 only, in which case,
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* it is free of charge, to any person obtaining a copy of this software and associated
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* documentation files (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "rom/ets_sys.h"
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#include "driver/gpio.h"
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#include "i2c_soft.h"
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static uint8_t m_nLastSDA;
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static uint8_t m_nLastSCL;
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/******************************************************************************
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* FunctionName : i2c_master_setDC
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* Description : Internal used function -
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* set i2c SDA and SCL bit value for half clk cycle
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* Parameters : uint8_t SDA
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* uint8_t SCL
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* Returns : NONE
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*******************************************************************************/
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static void i2c_master_setDC(uint8_t SDA, uint8_t SCL)
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{
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SDA &= 0x01;
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SCL &= 0x01;
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m_nLastSDA = SDA;
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m_nLastSCL = SCL;
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//ETS_INTR_LOCK();
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if ((0 == SDA) && (0 == SCL)) {
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I2C_MASTER_SDA_LOW_SCL_LOW();
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} else if ((0 == SDA) && (1 == SCL)) {
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I2C_MASTER_SDA_LOW_SCL_HIGH();
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} else if ((1 == SDA) && (0 == SCL)) {
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I2C_MASTER_SDA_HIGH_SCL_LOW();
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} else {
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I2C_MASTER_SDA_HIGH_SCL_HIGH();
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}
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//ETS_INTR_UNLOCK();
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}
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/******************************************************************************
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* FunctionName : i2c_master_getDC
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* Description : Internal used function -
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* get i2c SDA bit value
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* Parameters : NONE
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* Returns : uint8_t - SDA bit value
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*******************************************************************************/
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static uint8_t i2c_master_getDC(void)
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{
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uint8_t sda_out;
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//ETS_INTR_LOCK();
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//sda_out = GPIO_INPUT_GET(GPIO_ID_PIN(I2C_MASTER_SDA_GPIO));
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sda_out = gpio_get_level(GPIO_ID_PIN(I2C_MASTER_SDA_GPIO));
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//ETS_INTR_UNLOCK();
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return sda_out;
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}
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/******************************************************************************
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* FunctionName : i2c_master_init
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* Description : initilize I2C bus to enable i2c operations
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_init(void)
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{
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uint8_t i;
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i2c_master_setDC(1, 0);
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i2c_master_wait(5);
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// when SCL = 0, toggle SDA to clear up
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i2c_master_setDC(0, 0) ;
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i2c_master_wait(5);
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i2c_master_setDC(1, 0) ;
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i2c_master_wait(5);
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// set data_cnt to max value
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for (i = 0; i < 28; i++) {
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i2c_master_setDC(1, 0);
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i2c_master_wait(5); // sda 1, scl 0
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i2c_master_setDC(1, 1);
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i2c_master_wait(5); // sda 1, scl 1
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}
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// reset all
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i2c_master_stop();
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//return;
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}
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/******************************************************************************
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* FunctionName : i2c_master_gpio_init
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* Description : config SDA and SCL gpio to open-drain output mode,
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* mux and gpio num defined in i2c_master.h
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_gpio_init(void)
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{
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gpio_config_t io_config;
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io_config.pin_bit_mask= (I2C_MASTER_SDA_PIN) | (I2C_MASTER_SCL_PIN);
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io_config.mode= GPIO_MODE_INPUT_OUTPUT_OD;
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io_config.pull_up_en= GPIO_PULLUP_ENABLE;
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io_config.pull_down_en= GPIO_PULLDOWN_DISABLE;
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io_config.intr_type = GPIO_PIN_INTR_DISABLE;
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gpio_config(&io_config);
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#if 0
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io_config.gpio_intry_type_sel = GPIO_PIN_INTR_DISABLE;
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io_config.gpio_mode_sel = GPIO_MODE_OUTPUT_OD;
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io_config.gpio_pin_sel = I2C_MASTER_SCL_PIN;
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io_config.gpio_pulldown_sel = GPIO_PULLDOWN_DISABLE;
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io_config.gpio_pullup_sel = GPIO_PULLUP_ENABLE;
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gpio_config(&io_config);
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#endif
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#if 0
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ETS_INTR_UNLOCK();
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// Set to GPIO function
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PIN_FUNC_SELECT(I2C_MASTER_SDA_MUX, I2C_MASTER_SDA_FUNC);
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PIN_FUNC_SELECT(I2C_MASTER_SCL_MUX, I2C_MASTER_SCL_FUNC);
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// Enable input
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SET_PERI_REG_MASK(I2C_MASTER_SDA_MUX, FUN_IE);
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GPIO_REG_WRITE(GPIO_PIN_ADDR(I2C_MASTER_SDA_GPIO),
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GPIO_REG_READ(GPIO_PIN_ADDR(I2C_MASTER_SDA_GPIO)) | GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)); //open drain;
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GPIO_REG_WRITE(GPIO_ENABLE, GPIO_REG_READ(GPIO_ENABLE) | (1 << I2C_MASTER_SDA_GPIO));
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GPIO_REG_WRITE(GPIO_PIN_ADDR(I2C_MASTER_SCL_GPIO),
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GPIO_PIN_ADDR(I2C_MASTER_SCL_GPIO) | GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_ENABLE)); //open drain;
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GPIO_REG_WRITE(GPIO_ENABLE, GPIO_REG_READ(GPIO_ENABLE) | (1 << I2C_MASTER_SCL_GPIO));
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I2C_MASTER_SDA_HIGH_SCL_HIGH();
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PIN_PULLUP_EN(I2C_MASTER_SDA_MUX);
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PIN_PULLUP_EN(I2C_MASTER_SCL_MUX);
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ETS_INTR_UNLOCK();
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#endif
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i2c_master_init();
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}
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/******************************************************************************
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* FunctionName : i2c_master_start
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* Description : set i2c to send state
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_start(void)
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{
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// ETS_INTR_UNLOCK();
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i2c_master_setDC(1, m_nLastSCL);
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i2c_master_wait(5);
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i2c_master_setDC(1, 1);
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i2c_master_wait(5); // sda 1, scl 1
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i2c_master_setDC(0, 1);
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i2c_master_wait(5); // sda 0, scl 1
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// ETS_INTR_UNLOCK();
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}
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/******************************************************************************
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* FunctionName : i2c_master_stop
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* Description : set i2c to stop sending state
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_stop(void)
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{
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// ETS_INTR_UNLOCK();
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i2c_master_wait(5);
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i2c_master_setDC(0, m_nLastSCL);
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i2c_master_wait(5); // sda 0
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i2c_master_setDC(0, 1);
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i2c_master_wait(5); // sda 0, scl 1
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i2c_master_setDC(1, 1);
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i2c_master_wait(5); // sda 1, scl 1
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// ETS_INTR_UNLOCK();
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}
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/******************************************************************************
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* FunctionName : i2c_master_setAck
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* Description : set ack to i2c bus as level value
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* Parameters : uint8_t level - 0 or 1
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_setAck(uint8_t level)
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{
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// ETS_INTR_UNLOCK();
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i2c_master_setDC(m_nLastSDA, 0);
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i2c_master_wait(5);
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i2c_master_setDC(level, 0);
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i2c_master_wait(5); // sda level, scl 0
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i2c_master_setDC(level, 1);
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i2c_master_wait(8); // sda level, scl 1
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i2c_master_setDC(level, 0);
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i2c_master_wait(5); // sda level, scl 0
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i2c_master_setDC(1, 0);
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i2c_master_wait(5);
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// ETS_INTR_UNLOCK();
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}
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/******************************************************************************
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* FunctionName : i2c_master_getAck
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* Description : confirm if peer send ack
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* Parameters : NONE
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* Returns : uint8_t - ack value, 0 or 1
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*******************************************************************************/
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uint8_t i2c_master_getAck(void)
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{
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uint8_t retVal;
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// ETS_INTR_UNLOCK();
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i2c_master_setDC(m_nLastSDA, 0);
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i2c_master_wait(5);
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i2c_master_setDC(1, 0);
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i2c_master_wait(5);
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i2c_master_setDC(1, 1);
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i2c_master_wait(5);
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retVal = i2c_master_getDC();
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i2c_master_wait(5);
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i2c_master_setDC(1, 0);
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i2c_master_wait(5);
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// ETS_INTR_UNLOCK();
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return retVal;
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}
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/******************************************************************************
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* FunctionName : i2c_master_checkAck
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* Description : get dev response
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* Parameters : NONE
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* Returns : true : get ack ; false : get nack
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*******************************************************************************/
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bool i2c_master_checkAck(void)
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{
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if(i2c_master_getAck()){
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return false;
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}else{
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return true;
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}
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}
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/******************************************************************************
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* FunctionName : i2c_master_send_ack
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* Description : response ack
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_send_ack(void)
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{
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i2c_master_setAck(0x0);
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}
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/******************************************************************************
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* FunctionName : i2c_master_send_nack
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* Description : response nack
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* Parameters : NONE
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_send_nack(void)
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{
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i2c_master_setAck(0x1);
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}
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/******************************************************************************
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* FunctionName : i2c_master_readByte
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* Description : read Byte from i2c bus
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* Parameters : NONE
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* Returns : uint8_t - readed value
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*******************************************************************************/
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uint8_t i2c_master_readByte(void)
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{
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uint8_t retVal = 0;
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uint8_t k, i;
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// ETS_INTR_UNLOCK();
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i2c_master_wait(5);
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i2c_master_setDC(m_nLastSDA, 0);
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i2c_master_wait(5); // sda 1, scl 0
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for (i = 0; i < 8; i++) {
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i2c_master_wait(5);
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i2c_master_setDC(1, 0);
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i2c_master_wait(5); // sda 1, scl 0
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i2c_master_setDC(1, 1);
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i2c_master_wait(5); // sda 1, scl 1
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k = i2c_master_getDC();
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i2c_master_wait(5);
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if (i == 7) {
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i2c_master_wait(3); ////
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}
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k <<= (7 - i);
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retVal |= k;
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}
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i2c_master_setDC(1, 0);
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i2c_master_wait(5); // sda 1, scl 0
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// ETS_INTR_UNLOCK();
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return retVal;
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}
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#define DBG_TONY ets_printf
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/******************************************************************************
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* FunctionName : i2c_master_writeByte
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* Description : write wrdata value(one byte) into i2c
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* Parameters : uint8_t wrdata - write value
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* Returns : NONE
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*******************************************************************************/
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void i2c_master_writeByte(uint8_t wrdata)
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{
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uint8_t dat;
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int8_t i;
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i2c_master_wait(5);
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i2c_master_setDC(m_nLastSDA, 0);
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i2c_master_wait(5);
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for (i = 7; i >= 0; i--) {
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dat = wrdata >> i;
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i2c_master_setDC(dat, 0);
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i2c_master_wait(5);
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i2c_master_setDC(dat, 1);
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i2c_master_wait(5);
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if (i == 0) {
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i2c_master_wait(3); ////
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}
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i2c_master_setDC(dat, 0);
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i2c_master_wait(5);
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}
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}
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