帮我写一个MAX4466和stm32f103单片机通讯的代码
时间: 2024-01-15 12:02:28 浏览: 138
当然可以为您提供相关代码。以下是示例代码:
#include "stm32f103_hal.h"
#include "max4466.h"
uint8_t MAX4466_CS_Pin = GPIO_PIN_0; // MAX4466的CS引脚
GPIO_TypeDef* MAX4466_CS_GPIO_Port = GPIOA;
SPI_HandleTypeDef hspi1; // STM32F103的SPI端口
void MAX4466_Init(void)
{
HAL_GPIO_WritePin(MAX4466_CS_GPIO_Port, MAX4466_CS_Pin, GPIO_PIN_SET);
}
void MAX4466_Read(uint16_t* data)
{
uint8_t txbuf[2] = {0x00, 0x00};
uint8_t rxbuf[2] = {0x00, 0x00};
HAL_GPIO_WritePin(MAX4466_CS_GPIO_Port, MAX4466_CS_Pin, GPIO_PIN_RESET); // 拉低CS使能
HAL_SPI_TransmitReceive(&hspi1, txbuf, rxbuf, 2, HAL_MAX_DELAY); // 发送读取命令并接收数据
HAL_GPIO_WritePin(MAX4466_CS_GPIO_Port, MAX4466_CS_Pin, GPIO_PIN_SET); // 拉高CS禁用
*data = ((uint16_t)rxbuf[0] << 8) | rxbuf[1]; // 数据以big-endian形式接收
}
int main(void)
{
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_SPI1_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = MAX4466_CS_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(MAX4466_CS_GPIO_Port, &GPIO_InitStruct);
SPI_HandleTypeDef hspi1;
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 10;
HAL_SPI_Init(&hspi1);
uint16_t data;
MAX4466_Init();
while (1)
{
MAX4466_Read(&data);
// 数据处理
}
}
希望这段代码能够帮到您。