本人正在使用MRS開發(fā)環(huán)境，開發(fā)CH32V307固件，涉及到浮點(diǎn)計(jì)算。

嘗試使用IQMath庫。

已經(jīng)在Extension Library中勾選了“Use iqmath”。

并且在Main.c中，include了 “IQmath_RV32.h”。

但編譯依然報(bào)錯(cuò)?。。簂d.exe: cannot find -lIQmath_RV32

請問：廠家是否有IQMath庫調(diào)用例程，或者是否有簡單的調(diào)用步驟。謝謝

CH32V307是支持硬件浮點(diǎn)的，可以是math.h中的sinf。IQMath主要是為沒有硬件浮點(diǎn)的MCU提供的定點(diǎn)運(yùn)算庫。如果CH32V307要使用IQMath，需要把f擴(kuò)展給關(guān)閉

謝謝您的回復(fù)。math.h庫的函數(shù)速度，不能滿足要求，所以才嘗試使用IQMath。請問如何關(guān)閉f擴(kuò)展。cannot find -lIQmath_RV32。感覺應(yīng)該是缺庫

參考這個(gè)圖片設(shè)置，關(guān)閉紅框里的2個(gè)地方

CH32V307是支持單精度的浮點(diǎn)，math.h中的不帶f結(jié)尾的函數(shù)都是double類型的速度很慢。要使用帶f結(jié)尾的函數(shù)，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-isattyr.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-isattyr.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-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擴(kuò)展。但編譯報(bào)錯(cuò)更多了。還是謝謝您的回復(fù)。

我們在嘗試一下sinf吧。

CH32V307VCT6.zip

用這個(gè)試試 IQMATH

謝謝您。您這個(gè)例程可以成功編譯。謝謝

再來麻煩一下您：

程序中，我調(diào)用math.h的sinf函數(shù)。實(shí)時(shí)產(chǎn)生一個(gè)30Hz的正弦波數(shù)據(jù)。

#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));

	}
}

測試無法編譯通過。報(bào)錯(cuò)：undefined reference to `sinf'

而如果調(diào)用sinf時(shí)，直接填寫一個(gè)固定數(shù)值，如sinf(0.2)，則能正常編譯。但這樣已經(jīng)沒有什么實(shí)用價(jià)值了，程序無法實(shí)時(shí)調(diào)用sinf函數(shù)，進(jìn)行實(shí)時(shí)計(jì)算。

感覺：math.h中的所有函數(shù)，都無法實(shí)時(shí)調(diào)用。至于sinf(0.2)成功的原因：編譯器提前計(jì)算了結(jié)果，并直接進(jìn)行了賦值，都不是實(shí)時(shí)計(jì)算。

把math數(shù)學(xué)庫添加到工程中，如上圖所示

呵呵，哎呀，沒想到是這個(gè)原因。謝謝

請問IQmath可以正常使用了嗎，我用的MounRiver Studio v1.51 在資源里面并沒有Extension Library
然后我在c++設(shè)置里面添加了iqmath庫 ，但是依然不能不用呀，調(diào)用IQmath_RV32.h直接報(bào)錯(cuò)不存在，請問這個(gè)iqmath現(xiàn)在如何添加呢

您好，MounRiver版本目前已更新，建議你先更新一下版本。CH32V307使用IQMath庫時(shí)，MounRiver配置如下：

首先在main文件中要包含頭文件路徑：#include"IQmath_RV32.h"，具體如下圖

其次要在Extension Library中勾選了“Use iqmath”。

最后，還需將f擴(kuò)展給關(guān)閉，具體如下圖，參考下圖設(shè)置，關(guān)閉紅框里兩個(gè)地方