196 lines
5.3 KiB
C
196 lines
5.3 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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Hardware NSS mode, master/slave mode, data transceiver:
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Master:SPI1_NSS(PA4)\SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7).
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Slave:SPI1_NSS(PA4)\SPI1_SCK(PA5)\SPI1_MISO(PA6)\SPI1_MOSI(PA7).
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This example demonstrates that in hardware NSS mode, the Master and Slave can
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transmit and receive in full duplex at the same time.
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Note: The two boards download the Master and Slave programs respectively, and
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power on at the same time.
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Hardware connection:
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PA5 -- PA5
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PA6 -- PA6
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PA7 -- PA7
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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_4;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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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_4;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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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_Hard;
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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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SPI_SSOutputCmd(SPI1, DISABLE);
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SPI_Cmd(SPI1, ENABLE);
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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;
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u8 j = 0;
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u8 value;
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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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#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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#endif
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while(1)
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{
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while((i < 18) || (j < 18))
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{
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if(i < 18)
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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 < 18)
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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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value = memcmp(TxData, RxData, Size);
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if(value == 0)
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{
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printf("Same\r\n");
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}
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else
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{
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printf("Different\r\n");
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}
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while(1);
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}
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}
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