/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2024/1/6
 * Description        : Main program body.
 *********************************************************************************
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * Attention: This software (modified or not) and binary are used for 
 * microcontroller manufactured by Nanjing Qinheng Microelectronics.
 *******************************************************************************/

/*
 *@Note
 *I2C DMA, master/slave mode transceiver routine:
 *I2C1_SCL(PB6)\I2C1_SDA(PB7).
 *This example demonstrates the 7-bit address mode, Master sends via DMA, 
 *and Slave receives via DMA.
 *Note: The two boards download the Master and Slave programs respectively, 
 *and power on at the same time.
 *     Hardware connection:
 *		       PB6--PB6
 *	           PB7--PB7
 *
 */

#include "debug.h"

/* I2C Mode Definition */
#define HOST_MODE   0
#define SLAVE_MODE   1

/* I2C Communication Mode Selection */
#define I2C_MODE   HOST_MODE
//#define I2C_MODE   SLAVE_MODE

/* Global define */
#define Size   6
#define Tize   6
#define RXAdderss   0x02
#define TxAdderss   0x02

/* Global Variable */
u8 TxData[Size] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 };
u8 RxData[5][Size];

/*********************************************************************
 * @fn      IIC_Init
 *
 * @brief   Initializes the IIC peripheral.
 *
 * @return  none
 */
void IIC_Init( u32 bound, u16 address )
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    I2C_InitTypeDef I2C_InitTSturcture = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );
    RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOB, &GPIO_InitStructure );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOB, &GPIO_InitStructure );

    I2C_InitTSturcture.I2C_ClockSpeed = bound;
    I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;
    I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_16_9;
    I2C_InitTSturcture.I2C_OwnAddress1 = address;
    I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;
    I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init( I2C1, &I2C_InitTSturcture );

    I2C_DMACmd( I2C1, ENABLE );

    I2C_Cmd( I2C1, ENABLE );
}

/*********************************************************************
 * @fn      DMA_Tx_Init
 *
 * @brief   Initializes the SPI1 DMAy Channelx configuration.
 *
 * @param   DMA_CHx -
 *          ppadr - Peripheral base address.
 *          memadr - Memory base address.
 *          bufsize - DMA channel buffer size.
 *
 * @return  none
 */
void DMA_Tx_Init( DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize )
{
    DMA_InitTypeDef DMA_InitStructure = {0};
    NVIC_InitTypeDef NVIC_InitStructure = {0};

    RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE );

    DMA_DeInit( DMA_CHx );

    DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
    DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = bufsize;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init( DMA_CHx, &DMA_InitStructure );

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init( &NVIC_InitStructure );

    DMA_ITConfig( DMA1_Channel6, DMA_IT_TC, ENABLE );
}

/*********************************************************************
 * @fn      DMA_Rx_Init
 *
 * @brief   Initializes the SPI1 DMAy Channelx configuration.
 *
 * @param   DMA_CHx -
 *          ppadr - Peripheral base address.
 *          memadr - Memory base address.
 *          bufsize - DMA channel buffer size.
 *
 * @return  none
 */
void DMA_Rx_Init( DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize )
{
    DMA_InitTypeDef DMA_InitStructure = {0};

    RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE );

    DMA_DeInit( DMA_CHx );

    DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
    DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = bufsize;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init( DMA_CHx, &DMA_InitStructure );
}

/*********************************************************************
 * @fn      DMA1_Channel6_IRQHandler
 *
 * @brief   This function handles DMA1 channel6 exception.
 *
 * @return  none
 */
void DMA1_Channel6_IRQHandler()
{
    if( DMA_GetITStatus( DMA1_IT_TC6 ) != RESET )
    {
        DMA_Cmd( DMA1_Channel6, DISABLE );
        DMA_ClearITPendingBit( DMA1_IT_TC6 );
    }
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main( void )
{
    uint8_t i ,t;
    uint8_t j ;
    NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
    SystemCoreClockUpdate();
    Delay_Init();
    USART_Printf_Init( 460800 );
    printf( "SystemClk:%d\r\n", SystemCoreClock );
    printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );

#if (I2C_MODE == HOST_MODE)
    printf( "IIC Host mode\r\n" );
    IIC_Init( 80000, TxAdderss );
    for( j =0; j < 5; j++)
	 {
	  DMA_Tx_Init( DMA1_Channel6, ( u32 )&I2C1->DATAR, ( u32 )TxData, Tize );
    while( I2C_GetFlagStatus( I2C1, I2C_FLAG_BUSY ) != RESET );
    I2C_GenerateSTART( I2C1, ENABLE );

    while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_MODE_SELECT ) );
    I2C_Send7bitAddress( I2C1, 0x02, I2C_Direction_Transmitter );

    while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) );

    DMA_Cmd( DMA1_Channel6, ENABLE );

    while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
    I2C_GenerateSTOP( I2C1, ENABLE );
	  Delay_Ms(1000);
			
	} 

#elif (I2C_MODE == SLAVE_MODE)
    printf( "IIC Slave mode\r\n" );
    IIC_Init( 80000, RXAdderss );

	for(t=0; t<5; t++)
	{
	DMA_Rx_Init( DMA1_Channel7, ( u32 )&I2C1->DATAR, ( u32)&RxData[t][0], Tize );
    while( !I2C_CheckEvent( I2C1, I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ) );
    DMA_Cmd( DMA1_Channel7, ENABLE );

    while( ( !DMA_GetFlagStatus( DMA1_FLAG_TC7 ) ) );
    
    while( !I2C_CheckEvent( I2C1, I2C_EVENT_SLAVE_STOP_DETECTED ) );
    I2C1->CTLR1 &= I2C1->CTLR1;

    printf( "RxData:\r\n" );

	for( i = 0; i < 6; i++ )
	{
	  printf( "%02x ", RxData[t][i] );
	  RxData[t][i] =0;
	}
	  printf( "\r\n ");
	}
				
    
#endif

    while( 1 );
}

