帮我 基于 LPC5516 上写一个 多路 SPI 同时初始化程序
时间: 2024-05-21 12:11:33 浏览: 15
当然,我可以帮您写一个基于LPC5516的多路SPI同时初始化程序。您可以参考以下代码:
#include "LPC5516xx.h"
#define SPI0_SSEL_PORT 0 // Chip select port for SPI0
#define SPI0_SSEL_PIN 15 // Chip select pin for SPI0
#define SPI1_SSEL_PORT 0 // Chip select port for SPI1
#define SPI1_SSEL_PIN 16 // Chip select pin for SPI1
#define SPI2_SSEL_PORT 0 // Chip select port for SPI2
#define SPI2_SSEL_PIN 17 // Chip select pin for SPI2
void SPI_Init(void)
{
// Enable clock for SPI0, SPI1, and SPI2
LPC_SYSCON->AHBCLKCTRLSET[1] = (1 << 18); // SPI0 clock
LPC_SYSCON->AHBCLKCTRLSET[1] = (1 << 19); // SPI1 clock
LPC_SYSCON->AHBCLKCTRLSET[1] = (1 << 20); // SPI2 clock
// SPI0 initialization
LPC_SPI0->CFG = (1 << 0) | (1 << 1) | (1 << 11) | (1 << 21); // Enable SPI0, master mode, synchronous serial communication, and MSB first
LPC_SPI0->DIV = 0; // Set SPI clock frequency to system clock frequency
LPC_SPI0->DLY = ((SystemCoreClock / 1000000) << 8) | (1 << 0); // Set SPI0 delay time
// SPI1 initialization
LPC_SPI1->CFG = (1 << 0) | (1 << 1) | (1 << 11) | (1 << 21); // Enable SPI1, master mode, synchronous serial communication, and MSB first
LPC_SPI1->DIV = 0; // Set SPI clock frequency to system clock frequency
LPC_SPI1->DLY = ((SystemCoreClock / 1000000) << 8) | (1 << 0); // Set SPI1 delay time
// SPI2 initialization
LPC_SPI2->CFG = (1 << 0) | (1 << 1) | (1 << 11) | (1 << 21); // Enable SPI2, master mode, synchronous serial communication, and MSB first
LPC_SPI2->DIV = 0; // Set SPI clock frequency to system clock frequency
LPC_SPI2->DLY = ((SystemCoreClock / 1000000) << 8) | (1 << 0); // Set SPI2 delay time
// SPI0 chip select initialization
LPC_GPIO->DIRSET[SPI0_SSEL_PORT] = (1 << SPI0_SSEL_PIN); // Set chip select pin as output
LPC_GPIO->SET[SPI0_SSEL_PORT] = (1 << SPI0_SSEL_PIN); // Set chip select pin high
// SPI1 chip select initialization
LPC_GPIO->DIRSET[SPI1_SSEL_PORT] = (1 << SPI1_SSEL_PIN); // Set chip select pin as output
LPC_GPIO->SET[SPI1_SSEL_PORT] = (1 << SPI1_SSEL_PIN); // Set chip select pin high
// SPI2 chip select initialization
LPC_GPIO->DIRSET[SPI2_SSEL_PORT] = (1 << SPI2_SSEL_PIN); // Set chip select pin as output
LPC_GPIO->SET[SPI2_SSEL_PORT] = (1 << SPI2_SSEL_PIN); // Set chip select pin high
}
这段代码可以用来初始化LPC5516芯片上的多路SPI。需要注意的是,这个程序只是一个初始化程序,它并没有实际的数据传输功能。如果您需要使用SPI传输数据,请在程序中添加相关代码。另外,对于SPI芯片的选择,您需要将相应的芯片片选信号接到LPC5516芯片的相应引脚。
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