#include?“spi.h“
#include?“stm8l15x_spi.h“
#include?“l(fā)ed.h“

/*
note:
????1??dma接收時數(shù)據(jù)會左移一位
????2??正常接收時會出現(xiàn)丟包
*/

//硬件SPI驅(qū)動flash
uint8_t?debug_status?=?0;
uint32_t?flash_id?=?0;
uint8_t?spi_tx_buf[DMA_BUF_TX_SIZE]?=?{0};
uint8_t?spi_rx_buf[DMA_BUF_RX_SIZE]?=?{0};
uint8_t?spi_busy_status?=?0;


void?spi_tx_dma_config（void）;

//初始化
void?spi_init（void）
{
????CLK_PeripheralClockConfig（CLK_Peripheral_SPI1ENABLE）;
????SYSCFG_REMAPPinConfig（REMAP_Pin_SPI1FullENABLE）;//開啟PA2-?PA3-?PC6-?PC5的重映射
????
????//MISO
????GPIO_Init（GPIOASPI_MISOGPIO_Mode_In_PU_No_IT）;
????GPIO_ExternalPullUpConfig（GPIOASPI_MISOENABLE）;
????
????//MOSI
????GPIO_Init（GPIOASPI_MOSIGPIO_Mode_Out_PP_High_Fast）;
????GPIO_ExternalPullUpConfig（GPIOASPI_MOSIENABLE）;
????
????//CLK
????GPIO_Init（GPIOCSPI_CLKGPIO_Mode_Out_PP_High_Fast）;
????
????//NSS
????GPIO_Init（GPIOB?SPI_NSS?GPIO_Mode_Out_PP_High_Fast）;
????GPIO_SetBits（GPIOBSPI_NSS）;
????
????//SPI
????SPI_DeInit（SPI1）;
????SPI_Init（SPI1?SPI_FirstBit_MSB?SPI_BaudRatePrescaler_2?SPI_Mode_Master?
?????????????SPI_CPOL_High?SPI_CPHA_2Edge?SPI_Direction_2Lines_FullDuplex?SPI_NSS_Soft?0x07）;???
????
//????SPI_ITConfig（SPI1SPI_IT_ERRENABLE）;
//????ITC_SetSoftwarePriority（SPI1_IRQn??ITC_PriorityLevel_1）;
????
????SPI_Cmd（SPI1?ENABLE）;

????spi_tx_dma_config（）;??
????
}

void?spi_set_cs_high（void）
{
????GPIO_SetBits（GPIOBSPI_NSS）;
}

void?spi_set_cs_low（void）
{
????GPIO_ResetBits（GPIOBSPI_NSS）;
}

uint8_t?spi_send_onebyte（uint8_t?data）
{???
????uint8_t?recv;
????
????/*?Loop?while?DR?register?in?not?emplty?*/??
????while?（SPI_GetFlagStatus（SPI1?SPI_FLAG_TXE）?==?RESET）;??
????/*?Send?byte?through?the?SPI1?peripheral?*/??
????SPI_SendData（SPI1?data）;?
????/*?Wait?to?receive?a?byte?*/??
????while?（SPI_GetFlagStatus（SPI1?SPI_FLAG_RXNE）?==?RESET）;??
????/*?Return?the?byte?read?from?the?SPI?bus?*/??
????recv?=?SPI_ReceiveData（SPI1）;???
????
????return?0;
}

uint8_t?spi_read_onebyte（void）
{?
????uint8_t?data;
????
????/*?Loop?while?DR?register?in?not?emplty?*/??
????while?（SPI_GetFlagStatus（SPI1?SPI_FLAG_TXE）?==?RESET）;??
????/*?Send?byte?through?the?SPI1?peripheral?*/??
????SPI_SendData（SPI1?0xFF）;?
????/*?Wait?to?receive?a?byte?*/??
????while?（SPI_GetFlagStatus（SPI1?SPI_FLAG_RXNE）?==?RESET）;??
????/*?Return?the?byte?read?from?the?SPI?bus?*/??
????data?=??SPI_ReceiveData（SPI1）;???????
????
????return?data;
}

//寫使能
void?flash_chip_write_able（void）
{
????//開始通訊
????spi_set_cs_low（）;
????
????//發(fā)送指令
????spi_send_onebyte（FLASH_CHIP_WRITE_ENABLE）;
????
????//結(jié)束通信
????spi_set_cs_high（）;
}

//寫失能
void?flash_chip_write_disable（void）
{
????//開始通訊
????spi_set_cs_low（）;
????
????//發(fā)送指令
????spi_send_onebyte（FLASH_CHIP_WRITE_DISABLE）;
????
????//結(jié)束通信
????spi_set_cs_high（）;
}

uint8_t?flash_chip_read_status（void）
{
????uint8_t?status;
????
????//開始通訊
????spi_set_cs_low（）;
????
????//發(fā)送讀狀態(tài)指令
????spi_s

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????11203??2018-05-10?10:29??spi.c

?????文件???????1766??2018-05-10?10:29??spi.h

-----------?---------??----------?-----??----

????????????????12969????????????????????2