一、硬件连接
| 功能口 | 引脚 |
|---|---|
| MISO | DIO_8 |
| MOSI | DIO_9 |
| CLK | DIO_10 |
| CSN | DIO_11 |
修改引脚配置： 例如 SDK2.4 multi_role工程 Startup目录下 board.c 跳转到 cc2640r2em_board.c
#if defined(CC2640R2DK_CXS) || defined (CC2640R2DK_4XS) \
|| defined (CC2640R2DK_5XD) || defined (CC2640R2DK_7ID)
#include "./cc2640r2em/cc2640r2em_board.c"
芯片为5x5时，跳转 CC2640R2DK_5XD.c
芯片为7x7时，跳转 CC2640R2DK_7ID.c
#elif defined(CC2640R2DK_5XD)
#include "../../boards/CC2640R2DK_5XD/Board.h"
#include "../../boards/CC2640R2DK_5XD/CC2640R2DK_5XD.c"
#elif defined(CC2640R2DK_7ID)
#include "../../boards/CC2640R2DK_7ID/Board.h"
#include "../../boards/CC2640R2DK_7ID/CC2640R2DK_7ID.c"
找到 SPI 结构体
/*
* =============================== SPI DMA ===============================
*/
#include <ti/drivers/SPI.h>
#include <ti/drivers/spi/SPICC26XXDMA.h>
SPICC26XXDMA_Object spiCC26XXDMAObjects[CC2640R2DK_5XD_SPICOUNT];
const SPICC26XXDMA_HWAttrsV1 spiCC26XXDMAHWAttrs[CC2640R2DK_5XD_SPICOUNT] = {
{
.baseAddr = SSI0_BASE,
.intNum = INT_SSI0_COMB,
.intPriority = ~0,
.swiPriority = 0,
.powerMngrId = PowerCC26XX_PERIPH_SSI0,
.defaultTxBufValue = 0,
.rxChannelBitMask = 1<<UDMA_CHAN_SSI0_RX,
.txChannelBitMask = 1<<UDMA_CHAN_SSI0_TX,
.mosiPin = CC2640R2DK_5XD_SPI0_MOSI,
.misoPin = CC2640R2DK_5XD_SPI0_MISO,
.clkPin = CC2640R2DK_5XD_SPI0_CLK,
.csnPin = CC2640R2DK_5XD_SPI0_CSN
}
};
跳转修改宏 CC2640R2DK_5XD_SPI0_MOSI、CC2640R2DK_5XD_SPI0_MISO、CC2640R2DK_5XD_SPI0_CLK
/* SPI Board */
#define CC2640R2DK_5XD_SPI0_MISO IOID_8//IOID_12 /* P1.20 */
#define CC2640R2DK_5XD_SPI0_MOSI IOID_9//IOID_11 /* P1.18 */
#define CC2640R2DK_5XD_SPI0_CLK IOID_10 /* P1.16 */
#define CC2640R2DK_5XD_SPI0_CSN PIN_UNASSIGNED
二、移植文件
链接：https://pan.baidu.com/s/1FyY_NgHTzJ5bI1oWxkr6iQ 提取码：cydx
将 board_spi.c 和 board_spi.h 两个文件拖拽至CCS工程的Application文件夹下
添加文件过程中，选项选择如下
2.1 board_spi.c
/*********************************************************************
* INCLUDES
*/
//#include <string.h>
#include <ti/drivers/SPI.h>
#include <ti/drivers/spi/SPICC26XXDMA.h>
#include <ti/drivers/PIN.h>
#include <ti/drivers/pin/PINCC26XX.h>
#include "board_spi.h"
/*********************************************************************
* LOCAL VARIABLES
*/
// SPI句柄及参数
static SPI_Handle s_spiHandle;
static SPI_Params s_spiParams;
static SPI_Transaction s_spiTransaction;
// SPI片选端口
static PIN_State s_spiCsnState;
static PIN_Handle s_spiCsnHandle;
static PIN_Config s_spiCsnPinsCfg[] =
{
BOARD_SPI0_CSN_IO | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL | PIN_DRVSTR_MIN,
PIN_TERMINATE
};
/*********************************************************************
* PUBLIC FUNCTIONS
*/
/**
@brief SPI的初始化函数
@param 无
@return 无
*/
void SPI_Init(void)
{
SPI_init();
SPI_Params_init(&s_spiParams);
s_spiParams.dataSize = 8;
s_spiCsnHandle = PIN_open(&s_spiCsnState, s_spiCsnPinsCfg);
s_spiHandle = SPI_open(Board_SPI0, &s_spiParams);
if(s_spiHandle == NULL)
{
while(1); // SPI_open() failed
}
}
/**
@brief SPI片选信号设置
@param pinId -[in] 引脚号
@param pinState -[in] 引脚状态
@return 无
*/
void SPI_CsnSet(PIN_Id pinId, bool pinState)
{
if(pinState == BOARD_SPI_CS_OFF)
{
PIN_setOutputValue(s_spiCsnHandle, pinId, 1);
}
else if(pinState == BOARD_SPI_CS_ON)
{
PIN_setOutputValue(s_spiCsnHandle, pinId, 0);
}
}
/**
@brief SPI读出写入数据
@param pWriteData -[in] 写入数据
@param pReadData -[out] 读出数据
@param writeDataLen -[in] 写入数据长度
@return 无
*/
void SPI_ReadWriteData(uint8_t *pWriteData, uint8_t *pReadData, uint8_t writeDataLen)
{
bool transferOk;
s_spiTransaction.count = writeDataLen; // 写入的数据长度
s_spiTransaction.arg = NULL;
s_spiTransaction.txBuf = pWriteData; // 发送缓冲区
s_spiTransaction.rxBuf = pReadData; // 接收缓冲区
transferOk = SPI_transfer(s_spiHandle, &s_spiTransaction); // 启动SPI传输
if(!transferOk)
{
// Error in SPI or transfer already in progress.
}
}
/*************************************END OF FILE*************************************/
2.2 board_spi.h
#ifndef _BOARD_SPI_H_
#define _BOARD_SPI_H_
/*********************************************************************
* INCLUDES
*/
#include "board.h"
/*********************************************************************
* DEFINITIONS
*/
#define BOARD_SPI_CS_ON 0
#define BOARD_SPI_CS_OFF 1
#define BOARD_SPI0_CSN_IO IOID_11
#define SPI_CS_HIGH SPI_CsnSet(BOARD_SPI0_CSN_IO, BOARD_SPI_CS_OFF)
#define SPI_CS_LOW SPI_CsnSet(BOARD_SPI0_CSN_IO, BOARD_SPI_CS_ON)
/*********************************************************************
* API FUNCTIONS
*/
void SPI_Init(void);
void SPI_CsnSet(PIN_Id pinId, bool pinState);
void SPI_ReadWriteData(uint8_t *pWriteData, uint8_t *pReadData, uint8_t writeDataLen);
#endif /* _BOARD_SPI_H_ */
三、API调用
需包含头文件 board_spi.h
SPI_Init
| 功能 | 初始化SPI驱动 |
|---|---|
| 函数定义 | void SPI_Init(void) |
| 参数 | 无 |
| 返回 | 无 |
SPI_CsnSet
| 功能 | SPI片选信号设置 |
|---|---|
| 函数定义 | void SPI_CsnSet(PIN_Id pinId, bool pinState) |
| 参数 | pinId：引脚号 pinState：引脚状态 |
| 返回 | 无 |
SPI_ReadWriteData
| 功能 | SPI读出写入数据 |
|---|---|
| 函数定义 | void SPI_ReadWriteData(uint8_t *pWriteData, uint8_t *pReadData, uint8_t writeDataLen) |
| 参数 | pWriteData：写入数据 pReadData：读出数据 writeDataLen：写入数据长度 |
| 返回 | 无 |
四、使用例子
1）添加头文件（例multi_role.c中）
#include "board_spi.h"
2）添加初始化代码（multi_role.c的multi_role_init函数末尾中）
// SPI初始化
RC522_Init();
3）写入数据
uint8_t temp[1] = {0x01};
SPI_ReadWriteData(temp, NULL, sizeof(uint8_t));
4）查看示波器
CLK
MOSI
• 由 Leung 写于 2019 年 8 月 26 日
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