SPI与外部闪存通信是否需要使用GPIO_Init配置用于SPI的端口？

你好;
我正在尝试使用SPI与外部闪存（M25PE80）进行通信。我正在使用STM8SPI库，但我没有成功写入/读取内存。我的疑问是关于引脚的配置。是否有任何Option Byte我必须设置为使用SPI备用功能？我是否需要使用GPIO_Init配置用于SPI（MISO，MOSI，CLK）的端口？对于片选引脚，我使用PortG0作为GPIO_MODE_OUT_PP_LOW_FAST。

这些是我用来初始化SPI的代码（来自stm8s_spi.c的功能）：

SPI_DeInit（）;

SPI_Init（SPI_FIRSTBIT_MSB，SPI_BAUDRATEPRESCALER_64，SPI_MODE_MASTER，SPI_CLOCKPOLARITY_HIGH，SPI_CLOCKPHASE_2EDGE，SPI_DATADIRECTION_2LINES_FULLDUPLEX，SPI_NSS_SOFT，0x07）;

SPI_Cmd（ENABLE）;



问候



以下为原文




Hello;
I'm trying to communicate to an external flash memory (M25PE80) using SPI. I´m using the STM8SPI librarie but I´m not having success to write/read from memory. My doubt is about the configuration of pins. Are there any Option Byte that I must set to use the SPI alternate function? Does I need to use the GPIO_Init to configure the ports used for SPI (MISO, MOSI, CLK)? For the Chip Select pin, I´m using the PortG0 as GPIO_MODE_OUT_PP_LOW_FAST.


These are the code I´m using to init the SPI (Funtions from stm8s_spi.c):



SPI_DeInit();


SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_64,SPI_MODE_MASTER,SPI_CLOCKPOLARITY_HIGH, SPI_CLOCKPHASE_2EDGE, SPI_DATADIRECTION_2LINES_FULLDUPLEX,SPI_NSS_SOFT, 0x07);


SPI_Cmd(ENABLE);






Regards