MCP2515模块_mcp2515接收错误

1、在配置Linux 编译选项时，开启相应的SPI 选项，如下所示

-> Device Drivers

-> SPI support

SPI support

*** SPI Master Controller Drivers ***

-*- Bitbanging SPI master

Samsung S3C24XX series SPI

< > Samsung S3C24XX series SPI by GPIO

*** SPI Protocol Masters ***

< > SPI EEPROMs from most vendors

User mode SPI device driver support

< > Infineon TLE62X0 (for power switching)设置完成保存。

2.驱动文件mcp251x.c mcp251x.h can.h

文件mcp251x.c放在目录drivers/net/can/下；

文件mcp251x.h放在目录include/linux/can/platform/下；

文件can.h放在目录include/linux/can/下

3.添加配置文件drivers/net/can/Kconfig

在文件中添加

config CAN_MCP251X

tristate “Microchip 251x series SPI CAN Controller”

depends on CAN && SPI

default N

—help—

Say Y here if you want support for the Microchip 251x series of

SPI based CAN controllers.

4.在drivers/net/can/Makefile文件中添加编译文件obj-$(CONFIG_CAN_MCP251X)                 += mcp251x.o

5. 修改文件arch/arm/mach-s3c2410/mach-smdk2410.c中添加spi板级启动信息#include #include //包含s3c2410_spi_info结构体

#include //包含struct mcp251x_platform_data结构体

static struct mcp251x_platform_data mcp251x_info = {

.f_osc = 16000000,

//.oscillator_frequency = 19000000,

//.board_specific_setup = myboard_mcp251x_initfunc,

//.device_reset = myboard_mcp251x_reset,

//.transceiver_enable = NULL,

};

static struct spi_board_info spi_board_info[] __initdata = {

[0]=

{

.modalias       = “mcp251x”, //这个名称一定要与mcp251x.c驱动中

//proc函数中的.name要一致

.platform_data  = &mcp251x_info,  //上面的结构体

.irq              = IRQ_EINT3,            中断端口号

.max_speed_hz  = 8000000,            //spi最大的速度

.bus_num        = 0,            //spi0，1中选择spi0口

.chip_select      = 0,            //多个芯片选择

},

};

static struct s3c2410_spi_info s3c2410_spi0_platdata = {

.pin_cs = S3C2410_GPG2,     //片选端口指定

.num_cs = 1,                  //总共端口数

// .bus_num = 0,

};

smdk2410_devices数组中添加&s3c_device_spi0,