第15课：lcd裸机例程，编译报错

my123456

工作环境ubuntu22.04, 编译器7.5.0，都是最新的稳定版本。
裸机例程代码，编译报错，请高手帮忙解答下，谢谢！log如下：

book@book-virtual-machine:~/linux/board_drivers/15_lcd$ make
arm-linux-gnueabihf-gcc -Wall -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/start.o project/start.S
arm-linux-gnueabihf-gcc -Wall -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/lib1funcs.o stdio/lib/lib1funcs.S
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/main.o project/main.c
In file included from project/main.c:20:0:
bsp/lcd/bsp_lcd.h:85:21: warning: inline function ‘lcd_readpoint’ declared but never defined
inline unsigned int lcd_readpoint(unsigned short x,unsigned short y);
                     ^~~~~~~~~~~~~
bsp/lcd/bsp_lcd.h:84:13: warning: inline function ‘lcd_drawpoint’ declared but never defined
inline void lcd_drawpoint(unsigned short x,unsigned short y,unsigned int color);
             ^~~~~~~~~~~~~
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/ctype.o stdio/lib/ctype.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/div64.o stdio/lib/div64.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/muldi3.o stdio/lib/muldi3.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/printf.o stdio/lib/printf.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/string.o stdio/lib/string.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/vsprintf.o stdio/lib/vsprintf.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_clk.o bsp/clk/bsp_clk.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_led.o bsp/led/bsp_led.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_delay.o bsp/delay/bsp_delay.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_beep.o bsp/beep/bsp_beep.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_gpio.o bsp/gpio/bsp_gpio.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_key.o bsp/key/bsp_key.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_exit.o bsp/exit/bsp_exit.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_int.o bsp/int/bsp_int.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_epittimer.o bsp/epittimer/bsp_epittimer.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_keyfilter.o bsp/keyfilter/bsp_keyfilter.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_uart.o bsp/uart/bsp_uart.c
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_lcdapi.o bsp/lcd/bsp_lcdapi.c
In file included from bsp/lcd/bsp_lcdapi.h:14:0,
                 from bsp/lcd/bsp_lcdapi.c:11:
bsp/lcd/bsp_lcd.h:85:21: warning: inline function ‘lcd_readpoint’ declared but never defined
inline unsigned int lcd_readpoint(unsigned short x,unsigned short y);
                     ^~~~~~~~~~~~~
bsp/lcd/bsp_lcd.h:84:13: warning: inline function ‘lcd_drawpoint’ declared but never defined
inline void lcd_drawpoint(unsigned short x,unsigned short y,unsigned int color);
             ^~~~~~~~~~~~~
arm-linux-gnueabihf-gcc -Wall -Wa,-mimplicit-it=thumb -nostdlib -fno-builtin -c -O2   -I imx6ul  -I stdio/include  -I bsp/clk  -I bsp/led  -I bsp/delay  -I bsp/beep  -I bsp/gpio  -I bsp/key  -I bsp/exit  -I bsp/int  -I bsp/epittimer  -I bsp/keyfilter  -I bsp/uart  -I bsp/lcd -o obj/bsp_lcd.o bsp/lcd/bsp_lcd.c
arm-linux-gnueabihf-ld -Timx6ul.lds -o lcd.elf obj/start.o obj/lib1funcs.o obj/main.o obj/ctype.o obj/div64.o obj/muldi3.o obj/printf.o obj/string.o obj/vsprintf.o obj/bsp_clk.o obj/bsp_led.o obj/bsp_delay.o obj/bsp_beep.o obj/bsp_gpio.o obj/bsp_key.o obj/bsp_exit.o obj/bsp_int.o obj/bsp_epittimer.o obj/bsp_keyfilter.o obj/bsp_uart.o obj/bsp_lcdapi.o obj/bsp_lcd.o -lgcc -L /usr/local/arm/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/7.5.0
obj/bsp_lcdapi.o: In function `lcd_drawline':
bsp_lcdapi.c.text+0x68): undefined reference to `lcd_drawpoint'
obj/bsp_lcdapi.o: In function `lcd_draw_Circle':
bsp_lcdapi.c.text+0x12c): undefined reference to `lcd_drawpoint'
bsp_lcdapi.c.text+0x140): undefined reference to `lcd_drawpoint'
bsp_lcdapi.c.text+0x158): undefined reference to `lcd_drawpoint'
bsp_lcdapi.c.text+0x170): undefined reference to `lcd_drawpoint'
obj/bsp_lcdapi.o:bsp_lcdapi.c.text+0x17a): more undefined references to `lcd_drawpoint' follow
make: *** [Makefile:59: lcd.bin] Error 1

my123456

网上查了一个帖子，说是内联函数和编译器的兼容性问题，把内联函数的打点和读点函数，从bsp_lcd.c文件挪到bsp_lcd.h文件后，编译能顺利通过了，但是LCD还是不亮。请高手指点。原帖子见如下链接

http://bbs.eeworld.com.cn/thread-1246098-1-1.html

jialongfei

同问！编译不通过

jialongfei

my123456 发表于 2024-1-25 13:09
网上查了一个帖子，说是内联函数和编译器的兼容性问题，把内联函数的打点和读点函数，从bsp_lcd.c文件挪到b ...

解决了吗？编译通过，但是LCD显示黑色，有背光但无内容

jialongfei

已解决，按照PDF教程将编译器改为4.9.4版本进行编译即可

hyhyx1

看来是编译器版本的问题。