本人正在使用MRS开发环境，开发CH32V307固件，涉及到浮点计算。
尝试使用IQMath库。
已经在Extension Library中勾选了“Use iqmath”。
并且在Main.c中，include了 “IQmath_RV32.h”。
但编译依然报错！！：ld.exe: cannot find -lIQmath_RV32
请问：厂家是否有IQMath库调用例程，或者是否有简单的调用步骤。谢谢
CH32V307是支持硬件浮点的，可以是math.h中的sinf。IQMath主要是为没有硬件浮点的MCU提供的定点运算库。如果CH32V307要使用IQMath，需要把f扩展给关闭
谢谢您的回复。math.h库的函数速度，不能满足要求，所以才尝试使用IQMath。请问如何关闭f扩展。cannot find -lIQmath_RV32。感觉应该是缺库
参考这个图片设置，关闭红框里的2个地方
CH32V307是支持单精度的浮点，math.h中的不带f结尾的函数都是double类型的速度很慢。要使用带f结尾的函数，如:sinf(x),cosf(x).
10:39:20 **** Incremental Build of configuration obj for project test_iqmath ****
make -j16 all
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d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-lseekr.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-lseekr.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memchr.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memchr.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memcpy.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memcpy.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memmove.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-memmove.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-mlock.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-mlock.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-nano-reallocr.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-nano-reallocr.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-readr.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-readr.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-reent.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-reent.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-nano-msizer.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libg_nano.a(lib_a-nano-msizer.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(close.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(close.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(fstat.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(fstat.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(isatty.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(isatty.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(lseek.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(lseek.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(read.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(read.o)
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(sbrk.o): can't link soft-float modules with single-float modules
d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/bin/ld.exe: failed to merge target specific data of file d:/mounriver/mounriver_studio/toolchain/risc-v embedded gcc/bin/../lib/gcc/riscv-none-embed/8.2.0/../../../../riscv-none-embed/lib/rv32imac/ilp32\libnosys.a(sbrk.o)
collect2.exe: error: ld returned 1 exit status
make: *** [makefile:55: test_iqmath.elf] Error 1
去掉了F扩展。但编译报错更多了。还是谢谢您的回复。
我们在尝试一下sinf吧。
用这个试试 IQMATH
谢谢您。您这个例程可以成功编译。谢谢
再来麻烦一下您：
程序中，我调用math.h的sinf函数。实时产生一个30Hz的正弦波数据。
#include "debug.h"
#include "math.h"
/* Global define */
#define PI 3.141592653589
/* Global Variable */
/*******************************************************************************
* Function Name : main
* Description : Main program.
* Input : None
* Return : None
*******************************************************************************/
int main(void)
{
float amp;
float phase_30REF = 0;
float det_phase_30REF;
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);
printf("WCH ^V^\r\n");
det_phase_30REF = 2*PI*30/90000;
while(1)
{
phase_30REF += det_phase_30REF;
amp = sinf(phase_30REF);
// amp = sinf(0.2);
printf("%d\r\n",(int)(amp*10000));
}
}
测试无法编译通过。报错：undefined reference to `sinf'
而如果调用sinf时，直接填写一个固定数值，如sinf(0.2)，则能正常编译。但这样已经没有什么实用价值了，程序无法实时调用sinf函数，进行实时计算。
感觉：math.h中的所有函数，都无法实时调用。至于sinf(0.2)成功的原因：编译器提前计算了结果，并直接进行了赋值，都不是实时计算。
把math数学库添加到工程中，如上图所示
呵呵，哎呀，没想到是这个原因。谢谢
请问IQmath可以正常使用了吗，我用的MounRiver Studio v1.51 在资源里面并没有Extension Library
然后我在c++设置里面添加了iqmath库 ，但是依然不能不用呀，调用IQmath_RV32.h直接报错不存在，请问这个iqmath现在如何添加呢
您好，MounRiver版本目前已更新，建议你先更新一下版本。CH32V307使用IQMath库时，MounRiver配置如下：
首先在main文件中要包含头文件路径：#include"IQmath_RV32.h"，具体如下图
其次要在Extension Library中勾选了“Use iqmath”。
最后，还需将f扩展给关闭，具体如下图，参考下图设置，关闭红框里两个地方
