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纯净的硅(高级)

基于TI-RTOS的SPI接口驱动及单独控制CS引脚 [复制链接]

  1. 【CC26X2R1_LAUNCHXL.c】 如下结构体中增加红色部分代码

GPIO_PinConfig gpioPinConfigs[] = {

……

   /* ADS1261*/

   GPIOCC26XX_DIO_30 | GPIO_DO_NOT_CONFIG, /* CS   已100K上拉,输入,低有效,SPI CS pin*/

   GPIOCC26XX_DIO_15 | GPIO_DO_NOT_CONFIG, /* PWDN 已100K上拉,输入,低有效 power down */

   GPIOCC26XX_DIO_21 | GPIO_DO_NOT_CONFIG, /* STR 已100K上拉,输入,高有效 启动转换*/

   GPIOCC26XX_DIO_25 | GPIO_DO_NOT_CONFIG, /* RST 已100K上拉,输入,低有效 复位 */

   GPIOCC26XX_DIO_26 | GPIO_DO_NOT_CONFIG, /* DRDY 无上拉,输出,低有效,数据准备就绪*/

};

 

  1. 【CC26X2R1_LAUNCHXL.c】使用SPI1,并且其中的CS引脚单独控制

const *** ***[CC26X2R1_LAUNCHXL_SPICOUNT] = {

   {

……

   },

   {

       .baseAddr           = SSI1_BASE,

       .intNum             = INT_SSI1_COMB,

       .intPriority       = ~0,

       .swiPriority       = 0,

       .powerMngrId       = PowerCC26XX_PERIPH_SSI1,

       .defaultTxBufValue = 0xFF,

       .rxChannelBitMask   = 1<<UDMA_CHAN_SSI1_RX,

       .txChannelBitMask   = 1<<UDMA_CHAN_SSI1_TX,

       .mosiPin           = CC26X2R1_LAUNCHXL_SPI1_MOSI,

       .misoPin           = CC26X2R1_LAUNCHXL_SPI1_MISO,

       .clkPin             = CC26X2R1_LAUNCHXL_SPI1_CLK,

       .csnPin             = PIN_UNASSIGNED, //单独控制 E2E LINK

       .minDmaTransferSize = 10

   }

};

 

  1. 【CC26X2R1_LAUNCHXL.h】新增如下定义

/* ADS 1261 */

#define CC26X2R1_LAUNCHXL_SPI1_MISO             IOID_27

#define CC26X2R1_LAUNCHXL_SPI1_MOSI             IOID_28

#define CC26X2R1_LAUNCHXL_SPI1_CLK             IOID_29

#define CC26X2R1_LAUNCHXL_SPI1_CSN             IOID_30

#define CC26X2R1_LAUNCHXL_ADS1261_PWDN         IOID_15       /* 已100K上拉,输入,低有效 power down */

#define CC26X2R1_LAUNCHXL_ADS1261_STR           IOID_21       /* 已100K上拉,输入,高有效 启动转换*/

#define CC26X2R1_LAUNCHXL_ADS1261_RST           IOID_25       /* 已100K上拉,输入,低有效 复位 */

#define CC26X2R1_LAUNCHXL_ADS1261_DRDY         IOID_26       /* 无上拉,输出,低有效,数据准备就绪*/

        

新增如下红色项

typedef enum CC26X2R1_LAUNCHXL_GPIOName {

   CC26X2R1_LAUNCHXL_GPIO_S1 = 0,

   CC26X2R1_LAUNCHXL_GPIO_S2,

   CC26X2R1_LAUNCHXL_GPIO_LED_GREEN,

   CC26X2R1_LAUNCHXL_GPIO_LED_RED,

   CC26X2R1_LAUNCHXL_GPIO_TMP116_EN,

   CC26X2R1_LAUNCHXL_GPIO_SPI_FLASH_CS,

   CC26X2R1_LAUNCHXL_SDSPI_CS,

   CC26X2R1_LAUNCHXL_GPIO_LCD_CS,

   CC26X2R1_LAUNCHXL_GPIO_LCD_POWER,

   CC26X2R1_LAUNCHXL_GPIO_LCD_ENABLE,

   CC26X2R1_LAUNCHXL_GPIO_ADS1261_CS,      /* IOID_30 已100K上拉,输入,低有效,SPI CS pin*/

   CC26X2R1_LAUNCHXL_GPIO_ADS1261_PWDN,/* IOID_15,已100K上拉,输入,低有效 power down */

   CC26X2R1_LAUNCHXL_GPIO_ADS1261_STR,      /* IOID_21,已100K上拉,输入,高有效 启动转换*/

   CC26X2R1_LAUNCHXL_GPIO_ADS1261_RST,     /* IOID_25已100K上拉,输入,低有效 复位 */

   CC26X2R1_LAUNCHXL_GPIO_ADS1261_DRDY, /* IOID_26无上拉,输出,低有效,数据准备就绪*/

   CC26X2R1_LAUNCHXL_GPIOCOUNT

} CC26X2R1_LAUNCHXL_GPIOName;

 

 

 

  1. 【spimaster.c】SPI初始化,基于EVM的实际情况

 

GPIO_setConfig(CC26X2R1_LAUNCHXL_GPIO_ADS1261_CS, GPIO_CFG_OUT_OD_NOPULL|GPIO_CFG_OUT_HIGH);      GPIO_setConfig(CC26X2R1_LAUNCHXL_GPIO_ADS1261_PWDN, GPIO_CFG_OUT_OD_NOPULL|GPIO_CFG_OUT_HIGH);

GPIO_setConfig(CC26X2R1_LAUNCHXL_GPIO_ADS1261_STR, GPIO_CFG_OUT_OD_NOPULL);

GPIO_setConfig(CC26X2R1_LAUNCHXL_GPIO_ADS1261_RST, GPIO_CFG_OUT_OD_NOPULL|GPIO_CFG_OUT_HIGH);

GPIO_setConfig(CC26X2R1_LAUNCHXL_GPIO_ADS1261_DRDY, GPIO_CFG_IN_PU);

 

   /* Open SPI as master (default) */

   SPI_Params_init(&spiParams);

   spiParams.frameFormat = SPI_POL0_PHA1;

   spiParams.bitRate = 4000000;

   masterSpi = SPI_open(CC26X2R1_LAUNCHXL_SPI1, &spiParams);

   if (masterSpi == NULL) {

       Display_printf(display, 0, 0, "Error initializing master SPI\n");

       while (1);

   }

   else {

       Display_printf(display, 0, 0, "Master SPI initialized\n");

}

 

其它改动这里不进一步赘述,请通过link获得代码工程,自行编译测试。

运行代码,参见如下串口打印信息:

 

测试代码会循环读写ADS1261内部寄存器,并会在最后读取ADS1261内u,其中“T:”表示CC2652 SPI口发送的数据,“R:”表示CC2652 SPI口接收到的数据,均为十六进。

 

Starting the SPI master example

Master SPI initialized

 

T:4100

R:FF41

T:4224

R:FF42

T:4301

R:FF43

T:4400

R:FF44

T:4520

R:FF45

T:4605E900

R:FF4605E9

T:4700E700

R:FF4700E7

T:48002400

R:FF480024

T:49003100

R:FF490031

T:4A000E00

R:FF4A000E

T:4B001B00

R:FF4B001B

T:4C40B700

R:FF4C40B7

T:4DFF9600

R:FF4DFF96

T:4E005A00

R:FF4E005A

T:4F004F00

R:FF4F004F

T:5000DB00

R:FF5000DB

T:51FF3D00

R:FF51FF3D

T:5200F100

R:FF5200F1

T:21006C000000

R:FF21006C00F3

T:220053000000

R:FF220053240F

T:230046000000

R:FF23004601F4

T:24002D000000

R:FF24002D00F3

T:250038000000

R:FF2500382013

T:260007000000

R:FF26000705E8

T:270012000000

R:FF27001200F3

T:2800D1000000

R:FF2800D100F3

T:2900C4000000

R:FF2900C400F3

T:2A00FB000000

R:FF2A00FB00F3

T:2B00EE000000

R:FF2B00EE00F3

T:2C0085000000

R:FF2C00854034

T:2D0090000000

R:FF2D0090FF00

T:2E00AF000000

R:FF2E00AF00F3

T:2F00BA000000

R:FF2F00BA00F3

T:30002E000000

R:FF30002E00F3

T:31003B000000

R:FF31003BFF00

T:320004000000

R:FF32000400F3

T:46108200

R:FF461082

T:5200F100

R:FF5200F1

T:5000DB00

R:FF5000DB

T:51BBE600

R:FF51BBE6

T:08007F00

R:FF08007F

T:0A005500

R:FF0A0055

T:1200AA0000000000

R:FF1200AA0654B219

Tmp:27.9743

最后,关于源TIVA驱动中的一处Bug,说明如下:

 

void writeMultipleRegisters(uint8_t addr, uint8_t count, const uint8_t data[])

{

/* Check that register map address range is not exceeded */

assert( (addr + count) <= NUM_REGISTERS );

 

uint8_t i;

for (i = addr; i < (addr + count); i++)

{

   writeSingleRegister(addr + i, data[i]); // 第一个值将是addr+addr

}

}

 

修改为:

 

void writeMultipleRegisters(uint8_t addr, uint8_t count, const uint8_t data[])

{

/* Check that register map address range is not exceeded */

assert( (addr + count) <= NUM_REGISTERS );

 

uint8_t i;

for (i = addr; i < (addr + count); i++)

{

   writeSingleRegister(i, data[i]);

}

}

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