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。
使以下示例工作的唯一方法是将它们声明为
const uint8_t LOC3 = 3;
和
const uint8_t PORTA = 0;
这是定义:
#define LOC3 3;
这是函数原型:
void spi_Setup(USART_TypeDef *spi,
uint8_t location, <-- this parameter here
bool master,
char* rxBuffer,
char* txBuffer);
即使将参数声明为 int 类型,它仍然不允许我这样调用函数:
spi_Setup(USART1, LOC3, true, receiveBuffer, transmitBuffer);
同样适用于数组索引:
#define PORTA 0;
这里正在调用该结构:
GPIO->P[PORTA].DOUTCLR = 1 << 1;
如前所述,这些示例都不起作用,
编译器设置:
方言:C99 编译器:GNU ARM嵌入式工具链
编译器标志:
-g -gdwarf-2 -mcpu = cortex-m0plus -mthumb -std = c99'-DDEBUG = 1''-DEFM32ZG222F32 = 1'-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“ -I” /home/access/Downloads/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/common/bsp“ -I “ / home / access /下载/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“ -O0 -Wall -c -fmessage-length = 0 -mno-sched-prolog -fno-builtin -ffunction-sections -fdata-sections
汇编器标志:
-g -gdwarf-2 -mcpu = cortex-m0plus -mthumb -c -x带有cpp的汇编器-I“ / home / access /下载/ simplicitystudio / pkg / simplicitystudio / opt / simplicitystudio / developer / sdks / gecko_sdk_suite / v2.3 // platform / CMSIS / Include“ -I” /家庭/访问/下载/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/EFM32ZG_STK3200/ config“ -I” / home / access /下载/simplicitystudio/pkg/simplicitystudio/opt/simplicitystudio/developer/sdks/gecko_sdk_suite/v2.3//hardware/kit/common/bsp“ -I” / home / access /下载/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/ simplestudio / 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” –规范= nano.specs
我问我的老人是谁,他说这很奇怪。我同意,因为我从未遇到过使用#defines这样的问题,实际上,这被认为是惯例。
我试图将数字用一组括号括起来
#define LOC3 (3)
但是那也不起作用。
以前有人遇到过这个问题吗?
预先感谢, MM25
答案 0 :(得分:5)
#define LOC3 3;
您需要删除;
,否则您的函数调用看起来像
spi_Setup(USART1, 3; , true, receiveBuffer, transmitBuffer);
这不是有效的C语法。
#define LOC3 3
将起作用。