can2--tiny6410移植mcp2515驱动
根据te6410
![](//img-my.csdn.net/uploads/201212/13/1355370585_7131.jpg)
移植mcp2515到tiny6410,将tiny按照te的连线如下
![](http://my.csdn.net/uploads/201207/14/1342272582_1434.jpg)
![](http://my.csdn.net/uploads/201207/14/1342273117_9052.jpg)
![](http://img-my.csdn.net/uploads/201212/13/1355370585_7131.jpg)
移植mcp2515到tiny6410,将tiny按照te的连线如下
![](http://my.csdn.net/uploads/201207/14/1342272582_1434.jpg)
![](http://my.csdn.net/uploads/201207/14/1342273117_9052.jpg)
tiny6410,linux2.6.38移植mcp251x 使用spi1,eint8 1.修改板子文件mach-mini6410.c,加入plateform平台设备 先加入头文件 //for spi add by medconn #include <plat/s3c64xx-spi.h> #include <linux/spi/spi.h> #include <linux/can.h> //for mcp251x add by medconn #include <linux/can/platform/mcp251x.h> #include <mach/gpio-bank-c.h> 在static struct platform_device *mini6410_devices[] __initdata 函数中加入 spi的平台设备 //&s3c64xx_device_spi0, &s3c64xx_device_spi1, 加入spi板子信息,这里使用eint8,飞凌使用的是eint16 /*add by medconn for mcp251x*/ static void cs_set_level(unsigned line_id, int lvl) { gpio_direction_output(line_id, lvl); }; static struct s3c64xx_spi_csinfo s3c64xx_spi1_csinfo = { .fb_delay=0x3, .line=S3C64XX_GPC(7), .set_level=cs_set_level, }; static int mcp251x_ioSetup(struct spi_device *spi) { // printk(KERN_INFO "mcp251x: setup gpio pins CS and External Int\n"); printk("mcp251x_ioSetup\n"); //s3c_gpio_setpull(S3C64XX_GPL(8), S3C_GPIO_PULL_UP); // External interrupt from CAN controller--eint16(gpl8) //s3c_gpio_cfgpin(S3C64XX_GPL(8), S3C_GPIO_SFN(3)); // External interrupt from CAN controller (hopefully external interrupt)--eint16(gpl8) s3c_gpio_setpull(S3C64XX_GPN(8), S3C_GPIO_PULL_UP); // External interrupt from CAN controller--eint8(gpn8) s3c_gpio_cfgpin(S3C64XX_GPN(8), S3C_GPIO_SFN(2)); // External interrupt from CAN controller (hopefully external interrupt)--eint8(gpn8) s3c_gpio_setpull(S3C64XX_GPC(7), S3C_GPIO_PULL_NONE); // Manual chip select pin as used in 6410_set_cs s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C_GPIO_OUTPUT); // Manual chip select pin as used in 6410_set_cs return 0; } static struct mcp251x_platform_data mcp251x_info = { .oscillator_frequency = 16000000, .board_specific_setup = mcp251x_ioSetup, .transceiver_enable = NULL, .power_enable = NULL, }; static struct spi_board_info __initdata forlinx6410_mc251x_info[] = { { .modalias = "mcp2515", .platform_data = &mcp251x_info, //.irq = IRQ_EINT(16),//--eint16(gpl8) .irq = IRQ_EINT(8), .max_speed_hz = 10*1000*1000, .bus_num = 1, .chip_select = 0, .mode = SPI_MODE_0, .controller_data=&s3c64xx_spi1_csinfo, }, }; 在static void __init mini6410_machine_init(void) 中加入几行,注册板子文件 //by medconn s3c64xx_spi_set_info(0,0,1); s3c64xx_spi_set_info(1,0,1); spi_register_board_info(forlinx6410_mc251x_info,ARRAY_SIZE(forlinx6410_mc251x_info)); platform_add_devices(mini6410_devices, ARRAY_SIZE(mini6410_devices)); 2.此时编译会出现错误 s3c64xx_device_spi0 符号链接出错,原因是s3c64xx_device_spi0所在文件dev-spi.c没有编译进内核,修改 arch/arm/mach-s3c64xx/Kconfig的 在config MACH_MINI6410 所属项目下加入一行 select S3C64XX_DEV_SPI 3.tiny6410默认没有配置spi主控制器驱动,所以需要配置一下 Device Drivers ---> [*] SPI support ---> <*> Samsung S3C64XX series type SPI <*> GPIO-based bitbanging SPI Master 4.修改mcp251x驱动 使用自带的mcp251x.c也可以,但是传输一会又失败了 使用我们的mcp251x.c,需修改line1131左右的一行为,否则在2.6.38下编译不通过 priv->wq = create_freezable_workqueue("mcp251x_wq"); tiny6410默认没有配置mcp251x驱动,配置一下 [*] Networking support ---> <*> CAN bus subsystem support ---> <*> Raw CAN Protocol (raw access with CAN-ID filtering) <*> Broadcast Manager CAN Protocol (with content filtering) CAN Device Drivers ---> <*> Platform CAN drivers with Netlink support [*] CAN bit-timing calculation <*> Microchip MCP251x SPI CAN controllers 重新编译烧写即可。