/********************************** (C) COPYRIGHT ******************************* * File Name : main.c * Author : WCH * Version : V1.0.0 * Date : 2021/06/06 * 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(PB8)\I2C1_SDA(PB9). 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:PB8 -- PB8 PB9 -- PB9 */ #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 | RCC_APB2Periph_AFIO, ENABLE ); GPIO_PinRemapConfig(GPIO_Remap_I2C1, ENABLE); RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE ); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; 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_9; 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 ); #if (I2C_MODE == HOST_MODE) I2C_AcknowledgeConfig( I2C1, ENABLE ); #endif } /********************************************************************* * @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 main * * @brief Main program. * * @return none */ int main(void) { uint8_t i ,t; uint8_t j ; NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 ); Delay_Init(); USART_Printf_Init( 460800 ); printf( "SystemClk:%d\r\n", SystemCoreClock ); #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 ) ) ); 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); }