* D2 APB1 Prescaler = 2 (APB1 Clock 100MHz) * D2 APB2 Prescaler = 2 (APB2 Clock 100MHz) * D3 APB4 Prescaler = 2 (APB4 Clock 100MHz) * HSE Frequency(Hz) = 25000000 * PLL_M = 5 * PLL_N = 160 * PLL_P = 2 * PLL_Q =
AI代码解释 // spi.c#include"spi.h"//以下是SPI模块的初始化代码,配置成主机模式//SPI口初始化//这里针是对SPI1的初始化voidSPI1_Init(void){GPIO_InitTypeDef GPIO_InitStructure;SPI_InitTypeDef SPI_InitStructure;RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);//使能GPIOB时钟RCC_APB2PeriphClockC...
}staticinlineintspi_sync_transfer(structspi_device *spi,structspi_transfer *xfers,unsignedintnum_xfers){structspi_messagemsg;spi_message_init_with_transfers(&msg, xfers, num_xfers);returnspi_sync(spi, &msg); }staticinlineintspi_read(structspi_device *spi,void*buf,size_tlen){structspi_transfer...
i2c总线和spi总线都可以挂载多个设备,spi支持一主多从,全双工通信,最大速率可达上百MHz。其中四根控制线包括: SCK:时钟线,数据收发同步 MOSI:数据线,主设备数据发送、从设备数据接收 MISO:数据线,从设备数据发送,主设备数据接收 NSS、CS:片选信号线 i2c通过i2c设备地址选择通信设备,而spi通过片选引脚选中要通信的...
• spi-max-frequency :从设备的最大频率; • reg :从设备的寄存器地址; • spi-rx-bus-width:对从设备进行数据读取时使用的 data 数据线个数; • spi-tx-bus-width :对从设备进行数据写入时使用的 data 数据线个数; • status :从设备的状态; 在menuconfig(Device Drivers->SPI support)里面配置...
uint32_t clock_frequency; /* SPI master clock frequency setting */ uint32_t mode; // SPI模式/功能选择 bool sip; bool flash; } hal_spi_master_config_t; ``` ### SPI传输结构体 ```c typedef struct { const uint8_t *tx_buf; /* Data buffer to send */ uint32_t tx_len; /* ...
HIGH-FREQUENCY READER CHIP,REAL-TIME CLOCK CHIP,SERIAL EEPROM MEMORY,LOW-POWER 32-BIT ARM CORTEX-M0 MCU,MCU CHIPS,安全加密芯片,HIGH ACCURATE REAL-TIME CLOCK CHIPS,低压电力线PLC芯片,PLC POWER LINE CHIPS,LOW-VOLTAGE POWER LINE PLC CHIP,低功耗MCU芯片,ARM CHIPS,LOW POWER 16-BIT MCU,LOW-POWER...
// SD card low speed mode frequency division parameter,spi clk speed = clk speed /((SPI_LOW_SPEED_DIV + 2) * 2 ) parameter SPI_HIGH_SPEED_DIV = 0 // SD card high speed mode frequency division parameter,spi clk speed = clk speed /((SPI_HIGH_SPEED_DIV + 2) * 2 ) ) ( input...
SPI_READ_REG0x00//读配置寄存器,低5位为寄存器地址#define SPI_WRITE_REG0x20//写配置寄存器,低5位为寄存器地址#define RD_RX_PLOAD0x61//读RX有效数据,1~32字节#define WR_TX_PLOAD0xA0//写TX有效数据,1~32字节#define FLUSH_TX0xE1//清除TX FIFO寄存器.发射模式下用#define FLUSH_RX0xE2//清除RX...
of_node; 1964 master->auto_runtime_pm = true; 1965 master->bus_num = pdev->id; 1966 master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | 1967 SPI_LSB_FIRST | SPI_3WIRE; 1968 master->bits_per_word_mask = spi->cfg->get_bpw_mask(spi); 1969 master->max_speed_hz = ...