STM32F103RCT6 通过SPI接口向LMP91200写16位数据

sunny00502

原子哥还有各位大神求帮忙解决 配置好了就是写不进去 弄了好几天了 还没弄出来 烦死了 附上技术手册
#include "spi.h"
#include "sys.h"
#include "usart.h"
#include "delay.h"
u16 LMP91200_status;
SPI_InitTypeDef SPI_InitStructure;
void spi_init(void)
{
 
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOB,ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
 
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_12);
 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
SPI_InitStructure.SPI_Direction=SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode=SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize=SPI_DataSize_16b;
SPI_InitStructure.SPI_CPOL=SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA=SPI_CPHA_2Edge; 
SPI_InitStructure.SPI_NSS=SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial=7;
   SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2,ENABLE);
lmp91200_spi_write16byte(0xffff);
 
}
u16 lmp91200_spi_write16byte(u16 send_data)
{
u8 retry=0;
while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_TXE)==RESET)
{
retry++;
if(retry>200)
{printf("SEND failed\r\n"); return 0;}

}
SPI_I2S_SendData(SPI2,send_data);
retry=0;
while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_RXNE)==RESET)
{
retry++;
if(retry>200) 
{printf("Receive failed\r\n"); return 0;}
}
return SPI_I2S_ReceiveData(SPI2);
}
void lmp91200_write16byte(u16 send_data)
{
GPIO_SetBits(GPIOB,GPIO_Pin_13);
GPIO_ResetBits(GPIOB,GPIO_Pin_12);
LMP91200_status=lmp91200_spi_write16byte(send_data);
  delay_ms(5);
GPIO_SetBits(GPIOB,GPIO_Pin_12);
}
时序图

电气特性图1

图2

正点原子

帮顶。。。。