99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
/*
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* Copyright (C) OpenTX
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*
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* Based on code named
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "board.h"
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void i2c2Init()
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{
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I2C_DeInit(I2CX);
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I2C_InitTypeDef I2C_InitStructure;
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I2C_InitStructure.I2C_ClockSpeed = I2CX_SPEED;
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I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
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I2C_InitStructure.I2C_OwnAddress1 = 0x00;
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I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
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I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
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I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
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I2C_Init(I2CX, &I2C_InitStructure);
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I2C_Cmd(I2CX, ENABLE);
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GPIO_PinAFConfig(I2CX_SCL_GPIO, I2CX_SCL_GPIO_PinSource, I2CX_GPIO_AF);
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GPIO_PinAFConfig(I2CX_SDA_GPIO, I2CX_SDA_GPIO_PinSource, I2CX_GPIO_AF);
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = I2CX_SCL_GPIO_PIN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(I2CX_SCL_GPIO, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = I2CX_SDA_GPIO_PIN;
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GPIO_Init(I2CX_SDA_GPIO, &GPIO_InitStructure);
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}
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#define I2C_TIMEOUT_MAX 1000
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bool I2C_WaitEvent(uint32_t event)
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{
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uint32_t timeout = I2C_TIMEOUT_MAX;
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while (!I2C_CheckEvent(I2CX, event)) {
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if ((timeout--) == 0) return false;
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}
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return true;
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}
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bool I2C2_WaitEventCleared(uint32_t event)
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{
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uint32_t timeout = I2C_TIMEOUT_MAX;
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while (I2C_CheckEvent(I2CX, event)) {
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if ((timeout--) == 0) return false;
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}
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return true;
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}
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void setVolume(uint8_t volume)
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{
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if (!I2C2_WaitEventCleared(I2C_FLAG_BUSY))
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return;
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I2C_GenerateSTART(I2CX, ENABLE);
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if (!I2C2_WaitEvent(I2C_EVENT_MASTER_MODE_SELECT))
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return;
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I2C_Send7bitAddress(I2C, I2C_ADDRESS_VOLUME, I2C_Direction_Transmitter);
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if (!I2C2_WaitEvent(I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
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return;
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I2C_SendData(I2CX, 0);
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if (!I2C2_WaitEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTING))
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return;
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I2C_SendData(I2CX, volume);
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if (!I2C2_WaitEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED))
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return;
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I2C_GenerateSTOP(I2CX, ENABLE);
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}
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int32_t getVolume()
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{
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return -1; // TODO
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}
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#endif
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