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test(dma,fft): rewrite test programs for dma, fft and fft_dma

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FallenSigh
2026-04-13 17:26:12 +08:00
parent 63fb8f6cc1
commit 84155db987
3 changed files with 28 additions and 109 deletions
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58
sdk/software/examples/fft_dma/main.c
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@@ -1,9 +1,13 @@
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#include <stdint.h>
#include <common_func.h>
#include <confreg_time.h>
#include <dma.h>
#include <fft.h>
// BSP板级支持包所需全局变量
unsigned long UART_BASE = 0xbf000000;
@@ -11,42 +15,8 @@ unsigned long CONFREG_TIMER_BASE = 0xbf20f100;
unsigned long CONFREG_CLOCKS_PER_SEC = 50000000L;
unsigned long CORE_CLOCKS_PER_SEC = 33000000L;
#define FFT_BASE 0xbf400000
#define FFT_IN_RE_BASE (FFT_BASE + 0x1000)
#define FFT_IN_IM_BASE (FFT_BASE + 0x2000)
#define FFT_OUT_RE_BASE (FFT_BASE + 0x3000)
#define FFT_OUT_IM_BASE (FFT_BASE + 0x4000)
#define FFT_CSR_REG (FFT_BASE + 0xF000)
#define FFT_CTRL_START (1 << 4)
#define FFT_STAT_DONE (1 << 1)
#define FFT_STAT_BUSY (1 << 0)
#define FFT_POINT_NUM 1024
#define DMA_BASE 0xbf300000
#define DMA_CTRL (DMA_BASE + 0x0000)
#define DMA_LEN (DMA_BASE + 0x0004)
#define DMA_SRC_ADDR (DMA_BASE + 0x0008)
#define DMA_DST_ADDR (DMA_BASE + 0x000c)
#define DMA_STATUS (DMA_BASE + 0x0010)
const float PI = 3.14159265358979323846;
// DMA 传输通用封装函数 (阻塞等待模式)
void dma_transfer(uint32_t phys_src, uint32_t phys_dst, uint32_t byte_len) {
RegWrite(DMA_SRC_ADDR, phys_src);
RegWrite(DMA_DST_ADDR, phys_dst);
RegWrite(DMA_LEN, byte_len);
// burst_len = 15(16拍), burst_size = 2(4字节), start = 1
uint32_t ctrl_val = (15 << 6) | (2 << 3) | 0x01;
RegWrite(DMA_CTRL, ctrl_val);
// 轮询等待 DMA 搬运完成
while ((RegRead(DMA_STATUS) & 0x01) == 0) {
// CPU 空转等待
}
}
// 软件FFT实现 (基2 DIT-FFT 算法)
void sw_fft(float re[], float im[], int n) {
int i, j, k, l;
@@ -152,18 +122,22 @@ int main(int argc, char** argv)
uint32_t transfer_bytes = FFT_POINT_NUM * 4; // 1024个点 * 4字节
// MA 将数据从内存搬运到 FFT 输入外设
dma_transfer(((uint32_t)hw_in_re_arr & 0x1FFFFFFF), phys_fft_in_re, transfer_bytes);
dma_transfer(((uint32_t)hw_in_im_arr & 0x1FFFFFFF), phys_fft_in_im, transfer_bytes);
dma_start_transfer(0, ((uint32_t)hw_in_re_arr & 0x1FFFFFFF), phys_fft_in_re, transfer_bytes, 100);
dma_start_transfer(1, ((uint32_t)hw_in_im_arr & 0x1FFFFFFF), phys_fft_in_im, transfer_bytes, 200);
dma_wait_polling(0);
dma_wait_polling(1);
// 启动 FFT 并等待计算完成
RegWrite(FFT_CSR_REG, FFT_CTRL_START);
while ((RegRead(FFT_CSR_REG) & FFT_STAT_DONE) == 0) {
// poll
}
fft_start();
fft_wait();
// DMA 将结果从 FFT 输出外设搬回内存
dma_transfer(phys_fft_out_re, ((uint32_t)hw_out_re_arr & 0x1FFFFFFF), transfer_bytes);
dma_transfer(phys_fft_out_im, ((uint32_t)hw_out_im_arr & 0x1FFFFFFF), transfer_bytes);
dma_start_transfer(0, phys_fft_out_re, ((uint32_t)hw_out_re_arr & 0x1FFFFFFF), transfer_bytes, 10);
dma_start_transfer(1, phys_fft_out_im, ((uint32_t)hw_out_im_arr & 0x1FFFFFFF), transfer_bytes, 20);
dma_wait_polling(0);
dma_wait_polling(1);
tick_end = get_ns(); // 结束计时
hw_time = tick_end - tick_start;