Linux之ARM(MX6U)裸机篇----5.仿stm32的LED驱动实验

娶不到胡一菲的汪大东2024-12-31 20:17

一，启动文件

cpp 复制代码 
.global _start
.global _bss_start      /* 类似宏定义把__bss_start定义为_bss_start */
_bss_start:
    .word __bss_start

.global _bss_end
_bss_end:
    .word __bss_end

_start:
    #设置处理器进入SVC模式
    mrs r0, cpsr        /* 读取cpsr到r0 */
    bic r0, r0, #0x1f   /* 清除cpsr的bit4-0 */
    orr r0, r0, #0x13   /* 使用svc模式 */
    msr cpsr, r0        /* 将r0写入到cpsr */
 
    #清除BSS段,全置0
    ldr r0, _bss_start
    ldr r1, _bss_end
    mov r2, #0          /* 向r2地址写0 */
bss_loop:
    stmia r0!, {r2}     /* 把r2寄存器的值写入r0寄存器中，r0再自增4个字节 */
    cmp r0, r1          /* 比较r0和r1里的值 */
    ble bss_loop        /* 如果r0地址小于等于r1,跳转到bss_loop中，继续清除bss段 */

    ldr sp, =0x80200000 /* 设置sp指针起始地址，此处已初始化ddr，若开发板未初始化ddr，则要手动初始化 */
    b main              /* 跳转到C语言main函数 */

二, main文件

采用结构体外交base基地址来访问外设

cpp 复制代码 
#include "imx6u.h"

/* 使能外设时钟 */
void clk_enable(void)
{
    CCM->CCGR0 = 0xFFFFFFFF;
    CCM->CCGR1 = 0xFFFFFFFF;
    CCM->CCGR2 = 0xFFFFFFFF;
    CCM->CCGR3 = 0xFFFFFFFF;
    CCM->CCGR4 = 0xFFFFFFFF;
    CCM->CCGR5 = 0xFFFFFFFF;
    CCM->CCGR6 = 0xFFFFFFFF;
}

void led_init(void)
{
    IOMUX_SW_MUX->GPIO1_IO03 = 0x5;     /* 复用为GPIO1-IO03 */
    IOMUX_SW_PAD->GPIO1_IO03 = 0x10B0;  /* 设置GPIO1_IO03电气属性 */

    /* GPIO初始化 */
    GPIO1->GDIR = 0x8;                  /* 设置为输出 */
    GPIO1->DR = 0x0;                    /* 打开LED灯 */
}

/* 短延时 */
void delay_short(volatile unsigned int n)
{
    while(n--){}
}

void delay(volatile unsigned int n)
{
    while(n--){
        delay_short(0x7ff);
    }
}

/* 打开LED灯 */
void led_on(void)
{
    GPIO1->DR &= -(1<<3);       /* bit3清零 */
}

/* 关闭LED灯 */
void led_off(void)
{
    GPIO1->DR |= (1<<3)         /* bit3置1 */
}

int main(void)
{
    clk_enable();               /* 使能外设时钟 */
    led_init();                 /* 初始化LED */

    /* 设置LED闪烁 */
    while(1){
        led_on();
        delay(500);

        led_off();
        delay(500);
    }
    return 0;
}


#define CCM_BASE					(0X020C4000)
#define CCM_ANALOG_BASE				(0X020C8000)
#define IOMUX_SW_MUX_BASE			(0X020E0014)
#define IOMUX_SW_PAD_BASE			(0X020E0204)
#define GPIO1_BASE                  (0x0209C000)
#define GPIO2_BASE                  (0x020A0000)
#define GPIO3_BASE                  (0x020A4000)
#define GPIO4_BASE                  (0x020A8000)
#define GPIO5_BASE                  (0x020AC000)

/* 
 * CCM寄存器结构体定义，分为CCM和CCM_ANALOG 
 */
typedef struct 
{
	volatile unsigned int CCR;
	volatile unsigned int CCDR;
	volatile unsigned int CSR;
	volatile unsigned int CCSR;
	volatile unsigned int CACRR;
	volatile unsigned int CBCDR;
	volatile unsigned int CBCMR;
	volatile unsigned int CSCMR1;
	volatile unsigned int CSCMR2;
	volatile unsigned int CSCDR1;
	volatile unsigned int CS1CDR;
	volatile unsigned int CS2CDR;
	volatile unsigned int CDCDR;
	volatile unsigned int CHSCCDR;
	volatile unsigned int CSCDR2;
	volatile unsigned int CSCDR3;	
	volatile unsigned int RESERVED_1[2];
	volatile unsigned int CDHIPR;  
	volatile unsigned int RESERVED_2[2];
	volatile unsigned int CLPCR;
	volatile unsigned int CISR;
	volatile unsigned int CIMR;
	volatile unsigned int CCOSR;
	volatile unsigned int CGPR;
	volatile unsigned int CCGR0;
	volatile unsigned int CCGR1;
	volatile unsigned int CCGR2;
	volatile unsigned int CCGR3;
	volatile unsigned int CCGR4;
	volatile unsigned int CCGR5;
	volatile unsigned int CCGR6;
	volatile unsigned int RESERVED_3[1];
	volatile unsigned int CMEOR;	
} CCM_Type; 

typedef struct 
{
	volatile unsigned int PLL_ARM;
	volatile unsigned int PLL_ARM_SET;
	volatile unsigned int PLL_ARM_CLR;
	volatile unsigned int PLL_ARM_TOG;
	volatile unsigned int PLL_USB1;
	volatile unsigned int PLL_USB1_SET;
	volatile unsigned int PLL_USB1_CLR;
	volatile unsigned int PLL_USB1_TOG;
	volatile unsigned int PLL_USB2;
	volatile unsigned int PLL_USB2_SET;
	volatile unsigned int PLL_USB2_CLR;
	volatile unsigned int PLL_USB2_TOG;
	volatile unsigned int PLL_SYS;
	volatile unsigned int PLL_SYS_SET;
	volatile unsigned int PLL_SYS_CLR;
	volatile unsigned int PLL_SYS_TOG;
	volatile unsigned int PLL_SYS_SS;
	volatile unsigned int RESERVED_1[3];
	volatile unsigned int PLL_SYS_NUM;
	volatile unsigned int RESERVED_2[3];
	volatile unsigned int PLL_SYS_DENOM; 
	volatile unsigned int RESERVED_3[3];
	volatile unsigned int PLL_AUDIO;
	volatile unsigned int PLL_AUDIO_SET;
	volatile unsigned int PLL_AUDIO_CLR;
	volatile unsigned int PLL_AUDIO_TOG;
	volatile unsigned int PLL_AUDIO_DENOM;
	volatile unsigned int RESERVED_4[3];
	volatile unsigned int PLL_VIDEO;
	volatile unsigned int PLL_VIDEO_SET;
	volatile unsigned int PLL_VIDEO_CLR;
	volatile unsigned int PLL_VIDEO_TOG;
	volatile unsigned int PLL_VIDEO_NUM;
	volatile unsigned int RESERVED_5[3];
	volatile unsigned int PLL_VIDEO_DENOM;
	volatile unsigned int RESERVED_6[7];
	volatile unsigned int PLL_ENET;
	volatile unsigned int PLL_ENET_SET;
	volatile unsigned int PLL_ENET_CLR;
	volatile unsigned int PLL_ENET_TOG;
	volatile unsigned int PFD_480;
	volatile unsigned int PFD_480_SET;
	volatile unsigned int PFD_480_CLR;
	volatile unsigned int PFD_480_TOG;
	volatile unsigned int PFD_528;
	volatile unsigned int PFD_528_SET;
	volatile unsigned int PFD_528_CLR;
	volatile unsigned int PFD_528_TOG;
	volatile unsigned int RESERVED_7[16];
	volatile unsigned int MISC0;
	volatile unsigned int MISC0_SET;
	volatile unsigned int MISC0_CLR;
	volatile unsigned int MISC0_TOG;
	volatile unsigned int MISC1;
	volatile unsigned int MISC1_SET;
	volatile unsigned int MISC1_CLR;
	volatile unsigned int MISC1_TOG;
	volatile unsigned int MISC2;
	volatile unsigned int MISC2_SET;
	volatile unsigned int MISC2_CLR;
	volatile unsigned int MISC2_TOG;
} CCM_ANALOG_Type; 

/* 
 * IOMUX寄存器组
 */
typedef struct 
{
	volatile unsigned int BOOT_MODE0;
	volatile unsigned int BOOT_MODE1;
	volatile unsigned int SNVS_TAMPER0;
	volatile unsigned int SNVS_TAMPER1;
	volatile unsigned int SNVS_TAMPER2;
	volatile unsigned int SNVS_TAMPER3;
	volatile unsigned int SNVS_TAMPER4;
	volatile unsigned int SNVS_TAMPER5;
	volatile unsigned int SNVS_TAMPER6;
	volatile unsigned int SNVS_TAMPER7;
	volatile unsigned int SNVS_TAMPER8;
	volatile unsigned int SNVS_TAMPER9;
	volatile unsigned int JTAG_MOD;
	volatile unsigned int JTAG_TMS;
	volatile unsigned int JTAG_TDO;
	volatile unsigned int JTAG_TDI;
	volatile unsigned int JTAG_TCK;
	volatile unsigned int JTAG_TRST_B;
	volatile unsigned int GPIO1_IO00;
	volatile unsigned int GPIO1_IO01;
	volatile unsigned int GPIO1_IO02;
	volatile unsigned int GPIO1_IO03;
	volatile unsigned int GPIO1_IO04;
	volatile unsigned int GPIO1_IO05;
	volatile unsigned int GPIO1_IO06;
	volatile unsigned int GPIO1_IO07;
	volatile unsigned int GPIO1_IO08;
	volatile unsigned int GPIO1_IO09;
	volatile unsigned int UART1_TX_DATA;
	volatile unsigned int UART1_RX_DATA;
	volatile unsigned int UART1_CTS_B;
	volatile unsigned int UART1_RTS_B;
	volatile unsigned int UART2_TX_DATA;
	volatile unsigned int UART2_RX_DATA;
	volatile unsigned int UART2_CTS_B;
	volatile unsigned int UART2_RTS_B;
	volatile unsigned int UART3_TX_DATA;
	volatile unsigned int UART3_RX_DATA;
	volatile unsigned int UART3_CTS_B;
	volatile unsigned int UART3_RTS_B;
	volatile unsigned int UART4_TX_DATA;
	volatile unsigned int UART4_RX_DATA;
	volatile unsigned int UART5_TX_DATA;
	volatile unsigned int UART5_RX_DATA;
	volatile unsigned int ENET1_RX_DATA0;
	volatile unsigned int ENET1_RX_DATA1;
	volatile unsigned int ENET1_RX_EN;
	volatile unsigned int ENET1_TX_DATA0;
	volatile unsigned int ENET1_TX_DATA1;
	volatile unsigned int ENET1_TX_EN;
	volatile unsigned int ENET1_TX_CLK;
	volatile unsigned int ENET1_RX_ER;
	volatile unsigned int ENET2_RX_DATA0;
	volatile unsigned int ENET2_RX_DATA1;
	volatile unsigned int ENET2_RX_EN;
	volatile unsigned int ENET2_TX_DATA0;
	volatile unsigned int ENET2_TX_DATA1;
	volatile unsigned int ENET2_TX_EN;
	volatile unsigned int ENET2_TX_CLK;
	volatile unsigned int ENET2_RX_ER;
	volatile unsigned int LCD_CLK;
	volatile unsigned int LCD_ENABLE;
	volatile unsigned int LCD_HSYNC;
	volatile unsigned int LCD_VSYNC;
	volatile unsigned int LCD_RESET;
	volatile unsigned int LCD_DATA00;
	volatile unsigned int LCD_DATA01;
	volatile unsigned int LCD_DATA02;
	volatile unsigned int LCD_DATA03;
	volatile unsigned int LCD_DATA04;
	volatile unsigned int LCD_DATA05;
	volatile unsigned int LCD_DATA06;
	volatile unsigned int LCD_DATA07;
	volatile unsigned int LCD_DATA08;
	volatile unsigned int LCD_DATA09;
	volatile unsigned int LCD_DATA10;
	volatile unsigned int LCD_DATA11;
	volatile unsigned int LCD_DATA12;
	volatile unsigned int LCD_DATA13;
	volatile unsigned int LCD_DATA14;
	volatile unsigned int LCD_DATA15;
	volatile unsigned int LCD_DATA16;
	volatile unsigned int LCD_DATA17;
	volatile unsigned int LCD_DATA18;
	volatile unsigned int LCD_DATA19;
	volatile unsigned int LCD_DATA20;
	volatile unsigned int LCD_DATA21;
	volatile unsigned int LCD_DATA22;
	volatile unsigned int LCD_DATA23;
	volatile unsigned int NAND_RE_B;
	volatile unsigned int NAND_WE_B;
	volatile unsigned int NAND_DATA00;
	volatile unsigned int NAND_DATA01;
	volatile unsigned int NAND_DATA02;
	volatile unsigned int NAND_DATA03;
	volatile unsigned int NAND_DATA04;
	volatile unsigned int NAND_DATA05;
	volatile unsigned int NAND_DATA06;
	volatile unsigned int NAND_DATA07;
	volatile unsigned int NAND_ALE;
	volatile unsigned int NAND_WP_B;
	volatile unsigned int NAND_READY_B;
	volatile unsigned int NAND_CE0_B;
	volatile unsigned int NAND_CE1_B;
	volatile unsigned int NAND_CLE;
	volatile unsigned int NAND_DQS;
	volatile unsigned int SD1_CMD;
	volatile unsigned int SD1_CLK;
	volatile unsigned int SD1_DATA0;
	volatile unsigned int SD1_DATA1;
	volatile unsigned int SD1_DATA2;
	volatile unsigned int SD1_DATA3;
	volatile unsigned int CSI_MCLK;
	volatile unsigned int CSI_PIXCLK;
	volatile unsigned int CSI_VSYNC;
	volatile unsigned int CSI_HSYNC;
	volatile unsigned int CSI_DATA00;
	volatile unsigned int CSI_DATA01;
	volatile unsigned int CSI_DATA02;
	volatile unsigned int CSI_DATA03;
	volatile unsigned int CSI_DATA04;
	volatile unsigned int CSI_DATA05;
	volatile unsigned int CSI_DATA06;
	volatile unsigned int CSI_DATA07;
}IOMUX_SW_MUX_Type;

typedef struct 
{
	volatile unsigned int DRAM_ADDR00;
	volatile unsigned int DRAM_ADDR01;
	volatile unsigned int DRAM_ADDR02;
	volatile unsigned int DRAM_ADDR03;
	volatile unsigned int DRAM_ADDR04;
	volatile unsigned int DRAM_ADDR05;
	volatile unsigned int DRAM_ADDR06;
	volatile unsigned int DRAM_ADDR07;
	volatile unsigned int DRAM_ADDR08;
	volatile unsigned int DRAM_ADDR09;
	volatile unsigned int DRAM_ADDR10;
	volatile unsigned int DRAM_ADDR11;
	volatile unsigned int DRAM_ADDR12;
	volatile unsigned int DRAM_ADDR13;
	volatile unsigned int DRAM_ADDR14;
	volatile unsigned int DRAM_ADDR15;
	volatile unsigned int DRAM_DQM0;
	volatile unsigned int DRAM_DQM1;
	volatile unsigned int DRAM_RAS_B;
	volatile unsigned int DRAM_CAS_B;
	volatile unsigned int DRAM_CS0_B;
	volatile unsigned int DRAM_CS1_B;
	volatile unsigned int DRAM_SDWE_B;
	volatile unsigned int DRAM_ODT0;
	volatile unsigned int DRAM_ODT1;
	volatile unsigned int DRAM_SDBA0;
	volatile unsigned int DRAM_SDBA1;
	volatile unsigned int DRAM_SDBA2;
	volatile unsigned int DRAM_SDCKE0;
	volatile unsigned int DRAM_SDCKE1;
	volatile unsigned int DRAM_SDCLK0_P;
	volatile unsigned int DRAM_SDQS0_P;
	volatile unsigned int DRAM_SDQS1_P;
	volatile unsigned int DRAM_RESET;
	volatile unsigned int TEST_MODE;
	volatile unsigned int POR_B;
	volatile unsigned int ONOFF;
	volatile unsigned int SNVS_PMIC_ON_REQ;
	volatile unsigned int CCM_PMIC_STBY_REQ;
	volatile unsigned int BOOT_MODE0;
	volatile unsigned int BOOT_MODE1;
	volatile unsigned int SNVS_TAMPER0;
	volatile unsigned int SNVS_TAMPER1;
	volatile unsigned int SNVS_TAMPER2;
	volatile unsigned int SNVS_TAMPER3;
	volatile unsigned int SNVS_TAMPER4;
	volatile unsigned int SNVS_TAMPER5;
	volatile unsigned int SNVS_TAMPER6;
	volatile unsigned int SNVS_TAMPER7;
	volatile unsigned int SNVS_TAMPER8;
	volatile unsigned int SNVS_TAMPER9;
	volatile unsigned int JTAG_MOD;
	volatile unsigned int JTAG_TMS;
	volatile unsigned int JTAG_TDO;
	volatile unsigned int JTAG_TDI;
	volatile unsigned int JTAG_TCK;
	volatile unsigned int JTAG_TRST_B;
	volatile unsigned int GPIO1_IO00;
	volatile unsigned int GPIO1_IO01;
	volatile unsigned int GPIO1_IO02;
	volatile unsigned int GPIO1_IO03;
	volatile unsigned int GPIO1_IO04;
	volatile unsigned int GPIO1_IO05;
	volatile unsigned int GPIO1_IO06;
	volatile unsigned int GPIO1_IO07;
	volatile unsigned int GPIO1_IO08;
	volatile unsigned int GPIO1_IO09;
	volatile unsigned int UART1_TX_DATA;
	volatile unsigned int UART1_RX_DATA;
	volatile unsigned int UART1_CTS_B;
	volatile unsigned int UART1_RTS_B;
	volatile unsigned int UART2_TX_DATA;
	volatile unsigned int UART2_RX_DATA;
	volatile unsigned int UART2_CTS_B;
	volatile unsigned int UART2_RTS_B;
	volatile unsigned int UART3_TX_DATA;
	volatile unsigned int UART3_RX_DATA;
	volatile unsigned int UART3_CTS_B;
	volatile unsigned int UART3_RTS_B;
	volatile unsigned int UART4_TX_DATA;
	volatile unsigned int UART4_RX_DATA;
	volatile unsigned int UART5_TX_DATA;
	volatile unsigned int UART5_RX_DATA;
	volatile unsigned int ENET1_RX_DATA0;
	volatile unsigned int ENET1_RX_DATA1;
	volatile unsigned int ENET1_RX_EN;
	volatile unsigned int ENET1_TX_DATA0;
	volatile unsigned int ENET1_TX_DATA1;
	volatile unsigned int ENET1_TX_EN;
	volatile unsigned int ENET1_TX_CLK;
	volatile unsigned int ENET1_RX_ER;
	volatile unsigned int ENET2_RX_DATA0;
	volatile unsigned int ENET2_RX_DATA1;
	volatile unsigned int ENET2_RX_EN;
	volatile unsigned int ENET2_TX_DATA0;
	volatile unsigned int ENET2_TX_DATA1;
	volatile unsigned int ENET2_TX_EN;
	volatile unsigned int ENET2_TX_CLK;
	volatile unsigned int ENET2_RX_ER;
	volatile unsigned int LCD_CLK;
	volatile unsigned int LCD_ENABLE;
	volatile unsigned int LCD_HSYNC;
	volatile unsigned int LCD_VSYNC;
	volatile unsigned int LCD_RESET;
	volatile unsigned int LCD_DATA00;
	volatile unsigned int LCD_DATA01;
	volatile unsigned int LCD_DATA02;
	volatile unsigned int LCD_DATA03;
	volatile unsigned int LCD_DATA04;
	volatile unsigned int LCD_DATA05;
	volatile unsigned int LCD_DATA06;
	volatile unsigned int LCD_DATA07;
	volatile unsigned int LCD_DATA08;
	volatile unsigned int LCD_DATA09;
	volatile unsigned int LCD_DATA10;
	volatile unsigned int LCD_DATA11;
	volatile unsigned int LCD_DATA12;
	volatile unsigned int LCD_DATA13;
	volatile unsigned int LCD_DATA14;
	volatile unsigned int LCD_DATA15;
	volatile unsigned int LCD_DATA16;
	volatile unsigned int LCD_DATA17;
	volatile unsigned int LCD_DATA18;
	volatile unsigned int LCD_DATA19;
	volatile unsigned int LCD_DATA20;
	volatile unsigned int LCD_DATA21;
	volatile unsigned int LCD_DATA22;
	volatile unsigned int LCD_DATA23;
	volatile unsigned int NAND_RE_B;
	volatile unsigned int NAND_WE_B;
	volatile unsigned int NAND_DATA00;
	volatile unsigned int NAND_DATA01;
	volatile unsigned int NAND_DATA02;
	volatile unsigned int NAND_DATA03;
	volatile unsigned int NAND_DATA04;
	volatile unsigned int NAND_DATA05;
	volatile unsigned int NAND_DATA06;
	volatile unsigned int NAND_DATA07;
	volatile unsigned int NAND_ALE;
	volatile unsigned int NAND_WP_B;
	volatile unsigned int NAND_READY_B;
	volatile unsigned int NAND_CE0_B;
	volatile unsigned int NAND_CE1_B;
	volatile unsigned int NAND_CLE;
	volatile unsigned int NAND_DQS;
	volatile unsigned int SD1_CMD;
	volatile unsigned int SD1_CLK;
	volatile unsigned int SD1_DATA0;
	volatile unsigned int SD1_DATA1;
	volatile unsigned int SD1_DATA2;
	volatile unsigned int SD1_DATA3;
	volatile unsigned int CSI_MCLK;
	volatile unsigned int CSI_PIXCLK;
	volatile unsigned int CSI_VSYNC;
	volatile unsigned int CSI_HSYNC;
	volatile unsigned int CSI_DATA00;
	volatile unsigned int CSI_DATA01;
	volatile unsigned int CSI_DATA02;
	volatile unsigned int CSI_DATA03;
	volatile unsigned int CSI_DATA04;
	volatile unsigned int CSI_DATA05;
	volatile unsigned int CSI_DATA06;
	volatile unsigned int CSI_DATA07;
	volatile unsigned int GRP_ADDDS;
	volatile unsigned int GRP_DDRMODE_CTL;
	volatile unsigned int GRP_B0DS;
	volatile unsigned int GRP_DDRPK;
	volatile unsigned int GRP_CTLDS;
	volatile unsigned int GRP_B1DS;
	volatile unsigned int GRP_DDRHYS;
	volatile unsigned int GRP_DDRPKE;
	volatile unsigned int GRP_DDRMODE;
	volatile unsigned int GRP_DDR_TYPE;
}IOMUX_SW_PAD_Type;

/* 
 * GPIO寄存器结构体
 */
typedef struct 
{
	volatile unsigned int DR;							
	volatile unsigned int GDIR; 							
	volatile unsigned int PSR;								
	volatile unsigned int ICR1; 							
	volatile unsigned int ICR2; 							 
	volatile unsigned int IMR;								 
	volatile unsigned int ISR;			
	volatile unsigned int EDGE_SEL;  
}GPIO_Type;


/* 
 * 外设指针 
 */
#define CCM					((CCM_Type *)CCM_BASE)
#define CCM_ANALOG			((CCM_ANALOG_Type *)CCM_ANALOG_BASE)
#define IOMUX_SW_MUX		((IOMUX_SW_MUX_Type *)IOMUX_SW_MUX_BASE)
#define IOMUX_SW_PAD		((IOMUX_SW_PAD_Type *)IOMUX_SW_PAD_BASE)
#define GPIO1				((GPIO_Type *)GPIO1_BASE)
#define GPIO2				((GPIO_Type *)GPIO2_BASE)
#define GPIO3				((GPIO_Type *)GPIO3_BASE)
#define GPIO4				((GPIO_Type *)GPIO4_BASE)
#define GPIO5				((GPIO_Type *)GPIO5_BASE)

三，链接脚本文件

链接脚本文件中对地址操作时要进行四字节对齐，很重要

cpp 复制代码 
SECTIONS{
	. = 0X87800000;
	.text :
	{
		obj/start.o 
		*(.text)
	}
	.rodata ALIGN(4) : {*(.rodata*)}
	.data ALIGN(4)   : { *(.data) }
	. = ALIGN(4);	#把_bass_start的地址四字节对齐，很重要
	__bss_start = . ;    
	.bss ALIGN(4)  : { *(.bss)  *(COMMON) }    
	__bss_end = . ;
}

四，makefile文件

cpp 复制代码 
objs    := start.o main.o
ld  	:= arm-linux-gnueabihf-ld
gcc  	:= arm-linux-gnueabihf-gcc
objcopy := arm-linux-gnueabihf-objcopy
objdump := arm-linux-gnueabihf-objdump


ledc.bin : $(objs)
	$(ld)  -Timx6u.lds -o ledc.elf $^
	$(objcopy) -O binary -S ledc.elf $@
	$(objdump) -D -m arm ledc.elf > ledc.dis

%.0 : %.c
	$(gcc) -Wall -nostdlib -c -O2 -o $@ $<
%.0 : %.s
	$(gcc) -Wall -nostdlib -c -O2 -o $@ $<


clean:
	rm -rf *.o ledc.bin ledc.elf ledc.dis
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