两个ARM间的SPI通信怎么实现？ARM型号均为STM32F429ZIT？？？

qpggup

发送时，采取的函数为HAL_SPI_Transmit_IT()；
- }7 X3 d, n! g/ d/ O接收时，由于不知道对方发过来的报文长度，
就不知道用什么函数。厂家提供的软件包里面的receive函数都需要
. n8 l) N( |( |, ]3 l- q$ S指定size长度。
" ?" v2 c4 B. l2 V$ A! T# k, b( t下面的代码中，我在最开始开启SPI_IT_RXNE中断使能。
+ C% P" {, F: T  w6 D/ K通过中断函数和数据处理函数来解析报文。并把报文上传网络服务器。
但是ARM SPI接收不到数据。不知道为啥？？？

本代码为SPI主机的。
8 D) g, u  [/ W* {. K( d. M5 B; |/* SPI5 init function */
void MX_SPI5_Init(void)
% Q, k$ g) E, \+ ?: a, L{

hspi5.Instance = SPI5;
hspi5.Init.Mode = SPI_MODE_MASTER;
hspi5.Init.Direction = SPI_DIRECTION_2LINES;
8 `6 z0 J4 f% f3 \9 Z3 A# a3 ?8 Ghspi5.Init.DataSize = SPI_DATASIZE_8BIT;
: j% ?( `3 c! ?* {hspi5.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi5.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi5.Init.NSS = SPI_NSS_SOFT;
. R5 Y8 N7 V: e9 \4 mhspi5.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi5.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi5.Init.TIMode = SPI_TIMODE_DISABLED;
hspi5.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
HAL_SPI_Init(&hspi5);

}

/**

• @brief Initializes the SPI according to the specified parameters
• in the SPI_InitTypeDef and create the associated handle.
• @param hspi: pointer to a SPI_HandleTypeDef structure that contains
• the configuration information for SPI module.
• @retval HAL status */ HAL_StatusTypeDef HAL_SPI_Init(SPI_HandleTypeDef *hspi) { ..... HAL_SPI_MspInit(hspi); ...... }
  

void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{

GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI4)
6 k# ~+ F# t) _  V' Y{
$ p; ^( _1 t' }4 ?/* Peripheral clock enable */
7 U" {! A. U, \__SPI4_CLK_ENABLE();

/**SPI4 GPIO Configuration PE2    ------> SPI4_SCKPE5    ------> SPI4_MISOPE6    ------> SPI4_MOSI*/GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_5|GPIO_PIN_6;GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_LOW;GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

}

if(hspi->Instance==SPI5)
{
! q: e5 J6 w! b+ U/* Peripheral clock enable /
1 X. o) Z4 O" x: i* y__SPI5_CLK_ENABLE();
# b! O( Z- C# C$ f- @# q/*SPI5 GPIO Configuration
/ L9 z) H# o7 `5 z2 x; xPF7 ------> SPI5_SCK
PF8 ------> SPI5_MISO
1 o6 _5 L# a4 h: fPF9 ------> SPI5_MOSI
! k" x  M! T& G0 O7 W*/
% B1 o/ P* o8 B" ]4 ]3 {* wGPIO_InitStruct.Pin = GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
3 c8 f$ d4 ?5 @  `GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
$ p' _+ z2 K3 G% |GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
* g( z1 j, a; ^$ O" e) T8 u; g/ q# MGPIO_InitStruct.Alternate = GPIO_AF5_SPI5;
& a3 f" [. b$ c& x0 p, k+ T3 xHAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

}

}

main()
7 [2 `- o. [6 g5 d4 H( g: Y{
& a0 x) T+ D9 G& kMX_SPI5_Init();
7 r, S& e2 s- J$ K__HAL_SPI_ENABLE_IT(&hspi5, SPI_IT_RXNE);
while (1)
{
SPI5_Master_Rx(); //读取从机发过来的数据。
8 |) E8 I: d9 Y) K! c& ~}
3 F6 d# C) b: t/ R% i$ L}

typedef uint8_t u8 ;
" w. F& k# r( Vtypedef uint16_t u16 ;
typedef uint32_t u32 ;
u8 hmosi[50]={0};
u8 mosi1[50]={0};
u8 phmosi[50]={0};
u32 imosi=0;
u32 spi5_rx_len;
0 j1 A! j; c* D, l  Su32 ic=0;
#define comsize 8
" }0 O% _9 U) a) x/ B% b
extern u16 tSession;
u32 udata_len_spi;
) {' ]+ R3 p! S+ {extern u16 ports[comsize+1];
2 V, Z' |6 c, p$ |" I/ Oextern u32 uTimeLst;
4 k9 s3 p3 W0 `4 @2 ?& M
$ f/ E# @6 e3 o6 }0 n( ~( v& [% pextern SPI_HandleTypeDef hspi5;
2 q+ j9 |* R6 h0 J' V' m% gvoid SPI5_IRQHandler(void)
{
" ?9 I7 s4 e8 p' U. {if(__HAL_SPI_GET_FLAG(&hspi5, SPI_FLAG_RXNE) == SET)
/ [% U4 |2 \' U7 u6 @2 i{
( ^# \- a6 g4 M2 C/ q- Y7 `hmosi[imosi++]=(uint8_t)(hspi5.Instance->DR);

}            

}

void SPI5_Master_Rx(void)
) D# M" V/ z9 w% A  g' @$ V{
//for(;imosi>=(ic+7);ic++)
' L  N( D2 F5 g' i7 Rfor(;imosi>=(ic+5);ic++)
{
7 f/ h- t0 l2 ]* N+ Yif((0x2e==hmosi[ic])&&(0x17==hmosi[ic+1])&&(0x0==hmosi[ic+2]))
{
8 Y( J4 A+ x: V8 f- J$ k  _$ z# ospi5_rx_len=hmosi[ic+6];
& w: H9 C' w' H$ Dudata_len_spi = spi5_rx_len+1;
memset(phmosi,0x00,udata_len_spi);
9 Z" O* _6 Q1 s* ~6 t0 i7 lphmosi[5]=hmosi[ic+5];

* e: A6 i9 X. ~1 _6 s# g2 P9 T+ Kphmosi[6]=spi5_rx_len-7;
mEMCpy(phmosi+7,hmosi+ic+7,spi5_rx_len-7);
memcpy(mosi1,hmosi+ic,50-ic);
* N+ W7 Q( M/ C; kmemcpy(hmosi,mosi1,50-ic);
2 c; z9 Q' W* q$ Jimosi=imosi-ic;
6 Y. r3 _6 J2 c  E, q  G6 b5 @ic=0;
//**************************
4 {3 S% d( f" Z" htSession++;
) h, F# F0 }# B( m% u4 zphmosi[0]=0x2e;
phmosi[1]=0x17;
phmosi[2]=0x00;

phmosi[3]=tSession;
3 `1 u4 |" y3 Dphmosi[4]=(tSession>>8);
7 i& H, U4 D& a7 Q/ B7 w5 ^5 U1 G
8 P& O  G4 v: _: ^6 X//memcpy(udata+7,tx1_buf,rx1cnt);
phmosi[udata_len_spi-1] = crc(phmosi,udata_len_spi-1,1);
com2net(ports[0],udata_len_spi,phmosi);
/ e+ _! [1 ~1 J2 s& l; R$ b) T5 `- ?uTimeLst=HAL_GetTick();
3 u9 c2 A5 _; \* j# }}
0 y1 L8 d; ]" z. X- L/ |}
( o* U0 A& C1 S% p4 `}

uerriup

同命相连，帮顶

ghqy22

我也遇到同样的问题，我在同一个板子上的两个口通信，总是收不到