/********************************** (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 *SPI DMA, master/slave mode transceiver routine: *Master:SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7). *Slave:SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7). * *This example demonstrates that Master and Slave use DAM full-duplex transmission *and reception at the same time. *Note: The two boards download the Master and Slave programs respectively, and power *on at the same time. *Hardware connection:PA5 -- PA5 * PA6 -- PA6 * PA7 -- PA7 * */ #include "debug.h" #include "string.h" /* SPI Mode Definition */ #define HOST_MODE 0 #define SLAVE_MODE 1 /* SPI Communication Mode Selection */ #define SPI_MODE HOST_MODE //#define SPI_MODE SLAVE_MODE /* Global define */ #define Size 18 /* Global Variable */ u16 TxData[Size] = {0x0101, 0x0202, 0x0303, 0x0404, 0x0505, 0x0606, 0x1111, 0x1212, 0x1313, 0x1414, 0x1515, 0x1616, 0x2121, 0x2222, 0x2323, 0x2424, 0x2525, 0x2626}; u16 RxData[Size]; /********************************************************************* * @fn SPI_FullDuplex_Init * * @brief Configuring the SPI for full-duplex communication. * * @return none */ void SPI_FullDuplex_Init(void) { GPIO_InitTypeDef GPIO_InitStructure = {0}; SPI_InitTypeDef SPI_InitStructure = {0}; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE); #if(SPI_MODE == HOST_MODE) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); #elif(SPI_MODE == SLAVE_MODE) GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); #endif SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; #if(SPI_MODE == HOST_MODE) SPI_InitStructure.SPI_Mode = SPI_Mode_Master; #elif(SPI_MODE == SLAVE_MODE) SPI_InitStructure.SPI_Mode = SPI_Mode_Slave; #endif SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI1, &SPI_InitStructure); #if(SPI_MODE == HOST_MODE) SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE); SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE); #endif SPI_Cmd(SPI1, ENABLE); } /********************************************************************* * @fn DMA_Tx_Init * * @brief Initializes the DMAy Channelx configuration. * * @param DMA_CHx - x can be 1 to 7. * 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}; 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_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; 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); } /********************************************************************* * @fn DMA_Rx_Init * * @brief Initializes the SPI1 DMA Channelx configuration. * * @param DMA_CHx - x can be 1 to 7. * 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_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; 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) { u8 i = 0, j = 0; SystemCoreClockUpdate(); Delay_Init(); USART_Printf_Init(460800); printf("SystemClk:%d\r\n", SystemCoreClock); printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() ); #if(SPI_MODE == SLAVE_MODE) printf("Slave Mode\r\n"); Delay_Ms(1000); #endif SPI_FullDuplex_Init(); #if(SPI_MODE == HOST_MODE) printf("Host Mode\r\n"); Delay_Ms(2000); DMA_Tx_Init(DMA1_Channel3, (u32)&SPI1->DATAR, (u32)TxData, Size); DMA_Rx_Init(DMA1_Channel2, (u32)&SPI1->DATAR, (u32)RxData, Size); DMA_Cmd(DMA1_Channel3, ENABLE); DMA_Cmd(DMA1_Channel2, ENABLE); #endif while(1) { #if(SPI_MODE == HOST_MODE) while((!DMA_GetFlagStatus(DMA1_FLAG_TC2)) && (!DMA_GetFlagStatus(DMA1_FLAG_TC3))); for(i = 0; i < Size; i++) { printf(" RxData:%04x\r\n", RxData[i]); } #elif(SPI_MODE == SLAVE_MODE) while((i < Size) || (j < Size)) { if(i < Size) { if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) != RESET) { SPI_I2S_SendData(SPI1, TxData[i]); i++; } } if(j < Size) { if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) != RESET) { RxData[j] = SPI_I2S_ReceiveData(SPI1); j++; } } } for(i = 0; i < Size; i++){ printf(" RxData:%04x\r\n", RxData[i]); } #endif while(1); } }