有一个奇怪的问题,基本上我不能使用#define指令声明一个整数,然后将该整数用作函数参数或索引数组。
要使以下示例正常工作,唯一的方法是将它们声明为
const uint8_t LOC3 = 3;
和
const uint8_t PORTA = 0;
下面是定义:
#define LOC3 3;
下面是函数原型:
void spi_Setup(USART_TypeDef *spi,
uint8_t location, <-- this parameter here
bool master,
char* rxBuffer,
char* txBuffer);
即使在将参数声明为int类型时,它仍然不允许我像这样调用函数:
spi_Setup(USART1, LOC3, true, receiveBuffer, transmitBuffer);
这同样适用于数组索引:
#define PORTA 0;
下面是调用该结构的示例:
GPIO->P[PORTA].DOUTCLR = 1 << 1;
如前所述,这两个示例都不起作用,
编译器设置:
方言: C99编译器: GNU ARM嵌入式工具链
编译器标志:
gdwarf-2-mcpu=
-m0plus -mthumb -std=c99 '-DDEBUG=1‘'-DEFM32ZG222F32=1’gdwarf -I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/common/bsp“-I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//platform/Device/SiliconLabs/EFM32ZG/Include”-I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//硬件/套件/通用/驱动程序“-O0 -Wall -c -fmessage-length=0 -mno-sched-prolog -fno-builtin -ffunction-sections -fdata-sections
汇编程序标志:
带有cpp的
-g -gdwarf-2 -mcpu= -mthumb -m0plus -c -x汇编程序“/ -I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//platform/CMSIS/Include”-I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/EFM32ZG_STK3200/config“/-c -I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/common/bsp“-I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//platform/Device/SiliconLabs/EFM32ZG/Include”-I"/home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/common/drivers“'-DEFM32ZG222F32=1‘
链接器标志:
-g -gdwarf-2 -mcpu=cortex m0plus -mthumb -T "${BuildArtifactFileBaseName}.ld“-Xlinker --gc-sections -Xlinker -Map="${BuildArtifactFileBaseName}.map”--specs=Nan.specs
我问过我的父亲,他是一位老手,他说这很奇怪。我同意,因为我从来没有以这种方式使用#定义的问题,事实上,它被认为是惯例。
我尝试用一组括号将数字括起来,即
#define LOC3 (3)
然而,这也不起作用。
以前有没有人遇到过这个问题?
提前谢谢你,MM25
发布于 2018-08-31 04:49:59
#define LOC3 3;
您需要删除;
,否则您的函数调用将如下所示
spi_Setup(USART1, 3; , true, receiveBuffer, transmitBuffer);
这不是有效的C语法。
#define LOC3 3
都会起作用的。
https://stackoverflow.com/questions/52105129
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