266 lines
8.0 KiB
C
266 lines
8.0 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*SPI DMA, master/slave mode transceiver routine:
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*Master:SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7).
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*Slave:SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7).
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*
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*This example demonstrates that Master and Slave use DAM full-duplex transmission
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*and reception at the same time.
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*Note: The two boards download the Master and Slave programs respectively, and power
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*on at the same time.
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*Hardware connection:PA5 -- PA5
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* PA6 -- PA6
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* PA7 -- PA7
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*
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*/
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#include "debug.h"
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#include "string.h"
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/* SPI Mode Definition */
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#define HOST_MODE 0
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#define SLAVE_MODE 1
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/* SPI Communication Mode Selection */
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#define SPI_MODE HOST_MODE
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//#define SPI_MODE SLAVE_MODE
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/* Global define */
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#define Size 18
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/* Global Variable */
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u16 TxData[Size] = {0x0101, 0x0202, 0x0303, 0x0404, 0x0505, 0x0606,
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0x1111, 0x1212, 0x1313, 0x1414, 0x1515, 0x1616,
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0x2121, 0x2222, 0x2323, 0x2424, 0x2525, 0x2626};
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u16 RxData[Size];
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/*********************************************************************
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* @fn SPI_FullDuplex_Init
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*
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* @brief Configuring the SPI for full-duplex communication.
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*
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* @return none
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*/
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void SPI_FullDuplex_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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SPI_InitTypeDef SPI_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);
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#if(SPI_MODE == HOST_MODE)
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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#elif(SPI_MODE == SLAVE_MODE)
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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#endif
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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#if(SPI_MODE == HOST_MODE)
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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#elif(SPI_MODE == SLAVE_MODE)
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SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
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#endif
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
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SPI_InitStructure.SPI_CRCPolynomial = 7;
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SPI_Init(SPI1, &SPI_InitStructure);
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#if(SPI_MODE == HOST_MODE)
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SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
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SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
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#endif
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SPI_Cmd(SPI1, ENABLE);
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}
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/*********************************************************************
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* @fn DMA_Tx_Init
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*
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* @brief Initializes the DMAy Channelx configuration.
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*
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* @param DMA_CHx - x can be 1 to 7.
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* ppadr - Peripheral base address.
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* memadr - Memory base address.
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* bufsize - DMA channel buffer size.
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*
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* @return none
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*/
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void DMA_Tx_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
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{
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DMA_InitTypeDef DMA_InitStructure = {0};
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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DMA_DeInit(DMA_CHx);
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DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
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DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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DMA_InitStructure.DMA_BufferSize = bufsize;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA_CHx, &DMA_InitStructure);
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}
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/*********************************************************************
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* @fn DMA_Rx_Init
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*
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* @brief Initializes the SPI1 DMA Channelx configuration.
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*
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* @param DMA_CHx - x can be 1 to 7.
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* ppadr - Peripheral base address.
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* memadr - Memory base address.
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* bufsize - DMA channel buffer size.
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*
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* @return none
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*/
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void DMA_Rx_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
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{
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DMA_InitTypeDef DMA_InitStructure = {0};
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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DMA_DeInit(DMA_CHx);
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DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
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DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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DMA_InitStructure.DMA_BufferSize = bufsize;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA_CHx, &DMA_InitStructure);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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u8 i = 0, j = 0;
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SystemCoreClockUpdate();
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Delay_Init();
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USART_Printf_Init(460800);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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#if(SPI_MODE == SLAVE_MODE)
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printf("Slave Mode\r\n");
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Delay_Ms(1000);
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#endif
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SPI_FullDuplex_Init();
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#if(SPI_MODE == HOST_MODE)
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printf("Host Mode\r\n");
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Delay_Ms(2000);
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DMA_Tx_Init(DMA1_Channel3, (u32)&SPI1->DATAR, (u32)TxData, Size);
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DMA_Rx_Init(DMA1_Channel2, (u32)&SPI1->DATAR, (u32)RxData, Size);
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DMA_Cmd(DMA1_Channel3, ENABLE);
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DMA_Cmd(DMA1_Channel2, ENABLE);
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#endif
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while(1)
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{
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#if(SPI_MODE == HOST_MODE)
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while((!DMA_GetFlagStatus(DMA1_FLAG_TC2)) && (!DMA_GetFlagStatus(DMA1_FLAG_TC3)));
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for(i = 0; i < Size; i++)
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{
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printf(" RxData:%04x\r\n", RxData[i]);
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}
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#elif(SPI_MODE == SLAVE_MODE)
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while((i < Size) || (j < Size))
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{
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if(i < Size)
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{
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if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) != RESET)
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{
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SPI_I2S_SendData(SPI1, TxData[i]);
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i++;
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}
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}
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if(j < Size)
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{
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if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) != RESET)
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{
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RxData[j] = SPI_I2S_ReceiveData(SPI1);
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j++;
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}
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}
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}
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for(i = 0; i < Size; i++){
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printf(" RxData:%04x\r\n", RxData[i]);
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}
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#endif
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while(1);
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}
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}
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