【LinkIt 7687试用体验】SPI连接发送

经过很多次调试将spi调试成功了。
fasong_data发送函数传值
jieshou_buffer接受值
也可以自主定义数据流。
spi.c
***********************************************************
#include "hal.h"
#include "system_mt7687.h"
#include "top.h"
#include "spi.h"
#include "inttypes.h"
#include "CMSIS.h"
#include "led.h"
uint32_t fasong_length=1;
uint8_t  jieshou_buffer={0x00};
uint32_t jieshou_length=2;
uint8_t  fasong_data={0x00};
void spi_send_and_receive()
{
fasong_length=1;
jieshou_length=2;
uint32_t clock_frequency = 1000000; //频率//SPI主时钟频率设置,范围从30000HZ到60000000HZ。
hal_spi_master_config_t spi_config;
log_hal_info("---spim_example begin---rn");
   hal_gpio_status_t ret;
                   //************
   ret = hal_gpio_init(HAL_GPIO_29);
   if (HAL_GPIO_STATUS_OK != ret)
       {
     log_hal_error("hal_gpio_init 29 failedrn");
     hal_gpio_deinit(HAL_GPIO_29);
     return;
       }
   ret = hal_gpio_init(HAL_GPIO_30);
   if (HAL_GPIO_STATUS_OK != ret)
       {
     log_hal_error("hal_gpio_init 30 failedrn");
     hal_gpio_deinit(HAL_GPIO_30);
     return;
       }
   ret = hal_gpio_init(HAL_GPIO_31);
   if (HAL_GPIO_STATUS_OK != ret)
       {
     log_hal_error("hal_gpio_init 31 failedrn");
     hal_gpio_deinit(HAL_GPIO_31);
     return;
       }
   ret = hal_gpio_init(HAL_GPIO_32);
   if (HAL_GPIO_STATUS_OK != ret)
       {
     log_hal_error("hal_gpio_init 32 failedrn");
     hal_gpio_deinit(HAL_GPIO_32);
     return;
       }
   hal_gpio_init(HAL_GPIO_28);
hal_pinmux_set_function(HAL_GPIO_29, HAL_GPIO_29_SPI_MOSI_M_CM4);
hal_pinmux_set_function(HAL_GPIO_30, HAL_GPIO_30_SPI_MISO_M_CM4);
hal_pinmux_set_function(HAL_GPIO_31, HAL_GPIO_31_SPI_SCK_M_CM4);
hal_pinmux_set_function(HAL_GPIO_32, HAL_GPIO_32_SPI_CS_0_S_CM4);
//spi初始化参数
spi_config.bit_order = HAL_SPI_MASTER_MSB_FIRST;
spi_config.slave_port = HAL_SPI_MASTER_SLAVE_0;
spi_config.clock_frequency = clock_frequency;
spi_config.phase = HAL_SPI_MASTER_CLOCK_PHASE0;
spi_config.polarity = HAL_SPI_MASTER_CLOCK_POLARITY0;
//缓存区属性赋值
hal_spi_master_send_and_receive_config_t spi_send_and_receive_config;
spi_send_and_receive_config.receive_buffer = &jieshou_buffer;
spi_send_and_receive_config.send_data = &fasong_data;
spi_send_and_receive_config.send_length = fasong_length;
spi_send_and_receive_config.receive_length = jieshou_length;
if (HAL_SPI_MASTER_STATUS_OK != hal_spi_master_init(HAL_SPI_MASTER_0, &spi_config)) {
        log_hal_info("hal_spi_master_init failn");
         return;
    }
         //此功能在FIFO模式下同时发送和接收数据。
          //此功能在传输完成前不会返回。
          //用户应该判断在发送命令期间接收的数据是否有效，并且此信息可以从SPI器件的数据手册获得。
           ret = hal_spi_master_send_and_receive_polling(HAL_SPI_MASTER_0, &spi_send_and_receive_config);//轮询模式同时发送和接收数据
          if (HAL_SPI_MASTER_STATUS_ERROR== ret) {
                  log_hal_info("spi master send and receive means the byte_order parameter is not configured rightly for the FIFO mode;n");//表示byte_order参数未正确配置为FIFO模式;
                 }
          else if (HAL_SPI_MASTER_STATUS_ERROR_BUSY== ret) {
                  log_hal_info("spi master send and receive means this port of SPI master is busy and not available for usen");//表示SPI主机的此端口正忙，不可使用;
     
                 }
          else if (HAL_SPI_MASTER_STATUS_ERROR_PORT== ret) {
                  log_hal_info("spi master send and receive means master_port parameter is an invalid port numbern");//表示master_port参数是无效的端口号;，不可使用;
         
                 }
           else if (HAL_SPI_MASTER_STATUS_INVALID_PARAMETER== ret) {
                  log_hal_info("spi master send and receive means an invalid parameter in spi_send_and_receive_config is givenn");//表示spi_send_and_receive_config中的无效参数;
      
                 }
           else{
              log_hal_info("spi master send and receive means this function return successfullyn");//表示此函数成功返回。
        
           }

          ret=hal_spi_master_deinit(HAL_SPI_MASTER_0);
          if (HAL_SPI_MASTER_STATUS_ERROR_PORT==ret ) {
  log_hal_info("spi master deinit means master_port parameter is an invalid port numbern");//表示master_port参数是无效的端口号;
  }
          else{
  log_hal_info("spi master deinit means this function return successfully. n");//表示此函数成功返回。
  return;
  }
              hal_gpio_deinit(HAL_GPIO_29);
              hal_gpio_deinit(HAL_GPIO_30);
              hal_gpio_deinit(HAL_GPIO_31);
              hal_gpio_deinit(HAL_GPIO_32);
}

***************************************
spi.h
**************************************************
#ifndef _SPI_H_
#define _SPI_H_
#include "hal.h"
#include "system_mt7687.h"
#include "top.h"
#include "spi.h"
#include "inttypes.h"
#include "CMSIS.h"
extern uint32_t fasong_length;
extern uint8_t  jieshou_buffer;
extern uint32_t jieshou_length;
extern uint8_t  fasong_data;
#ifdef __cplusplus
extern "C" {
  #endif
void spi_send_and_receive();
#ifdef __cplusplus
}
#endif
#endif /* __SPI433_H_ */