From 84155db987d1ab8ece48ad771266c828f87a875f Mon Sep 17 00:00:00 2001 From: FallenSigh Date: Mon, 13 Apr 2026 17:26:12 +0800 Subject: [PATCH] test(dma,fft): rewrite test programs for dma, fft and fft_dma --- sdk/software/examples/dma/main.c | 43 +++------------------ sdk/software/examples/fft/main.c | 36 ++++------------- sdk/software/examples/fft_dma/main.c | 58 ++++++++-------------------- 3 files changed, 28 insertions(+), 109 deletions(-) diff --git a/sdk/software/examples/dma/main.c b/sdk/software/examples/dma/main.c index 27832cd..60cf57d 100644 --- a/sdk/software/examples/dma/main.c +++ b/sdk/software/examples/dma/main.c @@ -1,9 +1,12 @@ #include #include #include +#include #include + #include #include +#include // BSP板级支持包所需全局变量 unsigned long UART_BASE = 0xbf000000; @@ -11,35 +14,12 @@ 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; - // 加上 aligned(64) 是为了防止 DMA 突发传输时跨越缓存行或 AXI 非对齐边界 uint32_t src_array[64] __attribute__((aligned(64))); uint32_t dst_array[64] __attribute__((aligned(64))); int main(int argc, char** argv) { - unsigned int dma_status = RegRead(DMA_STATUS); - printf("dma_status init = %x\n", dma_status); - uint32_t data_len = 64; uint32_t byte_len = data_len * 4; @@ -65,22 +45,9 @@ int main(int argc, char** argv) printf("uncached_src: %x\n", uncached_src); printf("uncached_dst: %x\n", uncached_dst); - // 配置 DMA：DMA 只需要最纯粹的物理地址 - RegWrite(DMA_SRC_ADDR, phys_src_addr); - RegWrite(DMA_DST_ADDR, phys_dst_addr); - RegWrite(DMA_LEN, byte_len); - - // burst_len = 15(16拍), burst_size = 2(4字节) - uint32_t burst_len = 15; - uint32_t burst_size = 2; - uint32_t ctrl_val = (burst_len << 6) | (burst_size << 3) | 0x01; - RegWrite(DMA_CTRL, ctrl_val); - - // 等待 DMA 完成 - while ((RegRead(DMA_STATUS) & 0x01) == 0) { - printf("polling...\n"); - } + dma_start_transfer(0, phys_src_addr, phys_dst_addr, byte_len); + dma_wait_polling(0); printf("dma passed!\n"); diff --git a/sdk/software/examples/fft/main.c b/sdk/software/examples/fft/main.c index 927e9f3..7945667 100644 --- a/sdk/software/examples/fft/main.c +++ b/sdk/software/examples/fft/main.c @@ -1,8 +1,10 @@ #include #include #include + #include #include +#include // BSP板级支持包所需全局变量 unsigned long UART_BASE = 0xbf000000; @@ -10,24 +12,6 @@ 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; // 读取定时器的当前Tick @@ -35,14 +19,12 @@ unsigned int get_timer_ticks() { return RegRead(CONFREG_TIMER_BASE); } -// --------------------------------------------------------- // 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; float tr, ti, ur, ui, wr, wi; - // 1. 比特翻转 (Bit Reversal) + // 比特翻转 (Bit Reversal) j = 0; for (i = 0; i < n - 1; i++) { if (i < j) { @@ -58,7 +40,7 @@ void sw_fft(float re[], float im[], int n) { j += k; } - // 2. 蝶形运算 (Butterfly Computation) + // 蝶形运算 (Butterfly Computation) for (l = 1; l < n; l *= 2) { ur = 1.0; ui = 0.0; @@ -110,9 +92,7 @@ int main(int argc, char** argv) unsigned int tick_start, tick_end; unsigned int hw_time, sw_time; - // ========================================== - // 1. 硬件加速 FFT 测试 - // ========================================== + // 硬件加速 FFT 测试 printf("\n--- Starting Hardware FFT ---\n"); tick_start = get_ns(); @@ -122,10 +102,8 @@ int main(int argc, char** argv) } - RegWrite(FFT_CSR_REG, FFT_CTRL_START); - while ((RegRead(FFT_CSR_REG) & FFT_STAT_DONE) == 0) { - // 等待硬件计算完成 - } + fft_start(); + fft_wait(); tick_end = get_ns(); diff --git a/sdk/software/examples/fft_dma/main.c b/sdk/software/examples/fft_dma/main.c index 066bcd3..febd07e 100644 --- a/sdk/software/examples/fft_dma/main.c +++ b/sdk/software/examples/fft_dma/main.c @@ -1,9 +1,13 @@ #include #include +#include #include #include + #include #include +#include +#include // 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;