/********************************** (C) COPYRIGHT ******************************* * File Name : main.c * Author : WCH * Version : V1.0.0 * Date : 2022/08/08 * 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 7-bit addressing mode, master/slave mode, transceiver routine: I2C1_SCL(PC2)\I2C1_SDA(PC1). This routine demonstrates that Master sends and Slave receives. Note: The two boards download the Master and Slave programs respectively, and power on at the same time. Hardware connection: PC2 -- PC2 PC1 -- PC1 */ #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 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_GPIOC | RCC_APB2Periph_AFIO, ENABLE ); RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE ); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init( GPIOC, &GPIO_InitStructure ); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init( GPIOC, &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_Cmd( I2C1, ENABLE ); #if (I2C_MODE == HOST_MODE) I2C_AcknowledgeConfig( I2C1, ENABLE ); #endif } /********************************************************************* * @fn main * * @brief Main program. * * @return none */ int main(void) { u8 i = 0; u8 j = 0; u8 p = 0; Delay_Init(); USART_Printf_Init(115200); printf("SystemClk:%d\r\n",SystemCoreClock); printf("IIC Host mode\r\n"); IIC_Init( 80000, TxAdderss); for( j =0; j < 5; j++) { while( I2C_GetFlagStatus( I2C1, I2C_FLAG_BUSY ) != RESET ); I2C_GenerateSTART( I2C1, ENABLE ); printf("0\n"); while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_MODE_SELECT ) ); I2C_Send7bitAddress( I2C1, 0x02, I2C_Direction_Transmitter ); printf("1\n"); Delay_Ms(10); while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) ); printf("2\n"); for( i=0; i< 6;i++ ) { if( I2C_GetFlagStatus( I2C1, I2C_FLAG_TXE ) != RESET ) { Delay_Ms(100); I2C_SendData( I2C1, TxData[i] ); } } while( !I2C_CheckEvent( I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) ); I2C_GenerateSTOP( I2C1, ENABLE ); Delay_Ms(1000); } while(1); }
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