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sensor_2026/HARDWARE/SPI/spi.c

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初步功能已经加全了
2026-02-09 11:14:38 +08:00
#include "spi.h"
//////////////////////////////////////////////////////////////////////////////////
//SPI <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//STM32F4<46><34><EFBFBD><EFBFBD>ģ<EFBFBD><C4A3>-<2D>⺯<EFBFBD><E2BAAF><EFBFBD>汾
//<2F>Ա<EFBFBD><D4B1><EFBFBD><EFBFBD>̣<EFBFBD>http://mcudev.taobao.com
//////////////////////////////////////////////////////////////////////////////////
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>SPIģ<49><C4A3><EFBFBD>ij<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD>ó<EFBFBD><C3B3><EFBFBD><EFBFBD><EFBFBD>ģʽ
//SPI<50>ڳ<EFBFBD>ʼ<EFBFBD><CABC>
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>SPI1<49>ij<EFBFBD>ʼ<EFBFBD><CABC>
void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//ʹ<><CAB9>GPIOAʱ<41><CAB1>
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//ʹ<><CAB9>SPI1ʱ<31><CAB1>
//GPIOFB3,4,5<><35>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;//PB3~5<><35><EFBFBD>ù<EFBFBD><C3B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//<2F><><EFBFBD>ù<EFBFBD><C3B9><EFBFBD>
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//<2F><><EFBFBD><EFBFBD>
GPIO_Init(GPIOB, &GPIO_InitStructure);//<2F><>ʼ<EFBFBD><CABC>
GPIO_PinAFConfig(GPIOB,GPIO_PinSource3,GPIO_AF_SPI1); //PB3<42><33><EFBFBD><EFBFBD>Ϊ SPI1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource4,GPIO_AF_SPI1); //PB4<42><34><EFBFBD><EFBFBD>Ϊ SPI1
GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_SPI1); //PB5<42><35><EFBFBD><EFBFBD>Ϊ SPI1
//<2F><><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>SPI<50>ڳ<EFBFBD>ʼ<EFBFBD><CABC>
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE);//<2F><>λSPI1
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE);//ֹͣ<CDA3><D6B9>λSPI1
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //<2F><><EFBFBD><EFBFBD>SPI<50><49><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˫<EFBFBD><CBAB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ:SPI<50><49><EFBFBD><EFBFBD>Ϊ˫<CEAA><CBAB>˫<EFBFBD><CBAB>ȫ˫<C8AB><CBAB>
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //<2F><><EFBFBD><EFBFBD>SPI<50><49><EFBFBD><EFBFBD>ģʽ:<3A><><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //<2F><><EFBFBD><EFBFBD>SPI<50><49><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD>С:SPI<50><49><EFBFBD>ͽ<EFBFBD><CDBD><EFBFBD>8λ֡<CEBB>ṹ
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //<2F><><EFBFBD><EFBFBD>ͬ<EFBFBD><CDAC>ʱ<EFBFBD>ӵĿ<D3B5><C4BF><EFBFBD>״̬Ϊ<CCAC>ߵ<EFBFBD>ƽ
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //<2F><><EFBFBD><EFBFBD>ͬ<EFBFBD><CDAC>ʱ<EFBFBD>ӵĵڶ<C4B5><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><D8A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><C2BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD><EFBFBD><EFBFBD>
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS<53>ź<EFBFBD><C5BA><EFBFBD>Ӳ<EFBFBD><D3B2><EFBFBD><EFBFBD>NSS<53>ܽţ<DCBD><C5A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>SSIλ<49><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:<3A>ڲ<EFBFBD>NSS<53>ź<EFBFBD><C5BA><EFBFBD>SSIλ<49><CEBB><EFBFBD><EFBFBD>
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //<2F><><EFBFBD>岨<EFBFBD><E5B2A8><EFBFBD><EFBFBD>Ԥ<EFBFBD><D4A4>Ƶ<EFBFBD><C6B5>ֵ:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><D4A4>ƵֵΪ256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //ָ<><D6B8><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD><EFBFBD><EFBFBD>MSBλ<42><CEBB><EFBFBD><EFBFBD>LSBλ<42><CEBB>ʼ:<3A><><EFBFBD>ݴ<EFBFBD><DDB4><EFBFBD><EFBFBD><EFBFBD>MSBλ<42><CEBB>ʼ
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCֵ<43><D6B5><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><C4B6><EFBFBD>ʽ
SPI_Init(SPI1, &SPI_InitStructure); //<2F><><EFBFBD><EFBFBD>SPI_InitStruct<63><74>ָ<EFBFBD><D6B8><EFBFBD>IJ<EFBFBD><C4B2><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>SPIx<49>Ĵ<EFBFBD><C4B4><EFBFBD>
SPI_Cmd(SPI1, ENABLE); //ʹ<><CAB9>SPI<50><49><EFBFBD><EFBFBD>
SPI1_ReadWriteByte(0xff);//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}
//SPI1<49>ٶ<EFBFBD><D9B6><EFBFBD><EFBFBD>ú<EFBFBD><C3BA><EFBFBD>
//SPI<50>ٶ<EFBFBD>=fAPB2/<2F><>Ƶϵ<C6B5><CFB5>
//@ref SPI_BaudRate_Prescaler:SPI_BaudRatePrescaler_2~SPI_BaudRatePrescaler_256
//fAPB2ʱ<32><CAB1>һ<EFBFBD><D2BB>Ϊ84Mhz<68><7A>
void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));//<2F>ж<EFBFBD><D0B6><EFBFBD>Ч<EFBFBD><D0A7>
SPI1->CR1&=0XFFC7;//λ3-5<><35><EFBFBD>㣬<EFBFBD><E3A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><C3B2><EFBFBD><EFBFBD><EFBFBD>
SPI1->CR1|=SPI_BaudRatePrescaler; //<2F><><EFBFBD><EFBFBD>SPI1<49>ٶ<EFBFBD>
SPI_Cmd(SPI1,ENABLE); //ʹ<><CAB9>SPI1
}
//SPI1 <20><>дһ<D0B4><D2BB><EFBFBD>ֽ<EFBFBD>
//TxData:Ҫд<D2AA><D0B4><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>
//<2F><><EFBFBD><EFBFBD>ֵ:<3A><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD>ֽ<EFBFBD>
u8 SPI1_ReadWriteByte(u8 TxData)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET){}//<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
SPI_I2S_SendData(SPI1, TxData); //ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>SPIx<49><78><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>byte <20><><EFBFBD><EFBFBD>
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET){} //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>byte
return SPI_I2S_ReceiveData(SPI1); //<2F><><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8>SPIx<49><78><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD>
}
u8 spi1_read_write_byte(u8 TxData)
{
SPI1_ReadWriteByte(TxData);
}