{"id":2377,"date":"2025-12-09T20:23:10","date_gmt":"2025-12-09T12:23:10","guid":{"rendered":"https:\/\/www.huangrongzhen.ink\/?p=2377"},"modified":"2025-12-09T20:33:08","modified_gmt":"2025-12-09T12:33:08","slug":"gd32f303-%e7%a1%ac%e4%bb%b6-spi-%e5%8f%91%e9%80%81%e4%bb%bb%e6%84%8f%e5%a4%9a%e5%ad%97%e8%8a%82","status":"publish","type":"post","link":"https:\/\/www.huangrongzhen.ink\/?p=2377","title":{"rendered":"GD32F303 \u786c\u4ef6 SPI \u53d1\u9001\u4efb\u610f\u591a\u5b57\u8282"},"content":{"rendered":"<div class=\"wp-block-post-excerpt\"><p class=\"wp-block-post-excerpt__excerpt\">\u4f7f\u7528\u5b9a\u65f6\u5668\u4e3b\u4ece\u6a21\u5f0f\uff0c\u914d\u5408 DMA \u548c\u786c\u4ef6 SPI\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5355\u4e2a\u7247\u9009\u5185\u53d1\u9001\u4efb\u610f\u591a\u4e2a\u5b57\u8282\u3002 <\/p><\/div>\n\n\n<p>\u4f7f\u7528 SPI \u4e0e DAC \u7b49\u6a21\u62df\u82af\u7247\u4ea4\u4e92\u65f6\uff0c\u6709\u65f6\u4f1a\u9047\u5230\u4e00\u4e2a\u6570\u636e\u5e27\u5305\u542b 24bit \u751a\u81f3\u662f 32bit \u6570\u3002\u4f46 GD32\/STM32 \u5f80\u5f80\u53ea\u652f\u6301 8bit\/16bit \u786c\u4ef6 SPI\u3002\u8981\u5728\u4e00\u4e2a\u6570\u636e\u5e27\u5185\u53d1\u9001 24bit\/32bit\uff0c\u53ea\u80fd\u8f6f\u4ef6\u63a7\u5236 SPI_CS \u4fe1\u53f7\uff0c\u7136\u540e\u591a\u6b21\u5411 SPI_DATA \u5199\u6570\u636e\uff0c\u51d1\u591f 24bit\/32bit \u6570\u636e\uff0c\u6700\u540e\u518d\u62c9\u9ad8 SPI_CS\uff0c\u65e0\u6cd5\u505a\u5230\u786c\u4ef6\u5168\u81ea\u52a8\u53d1\u9001\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u6848\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5355\u4e2a SPI \u7247\u9009\u5185\u4f20\u8f93\u4efb\u610f\u591a\u5b57\u8282\u3002\u5168\u7a0b\u7531\u786c\u4ef6\u63a7\u5236 SPI_CS\u3001SPI_SCK\u3001SPI_MOSI \u4fe1\u53f7\uff0c\u5b9e\u73b0\u5168\u786c\u4ef6\u81ea\u52a8\u4f20\u8f93\uff0c\u5168\u7a0b\u65e0\u9700 CPU \u5e72\u9884\u3002<\/p>\n\n\n\n<p>\u539f\u7406\uff1a<\/p>\n\n\n\n<p>1\u3001GD32F303 \u7684 DMA0 \u8bf7\u6c42\u6e90\u5982\u4e0b\u6240\u793a\u3002\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e TIMER0 \u4ea7\u751f\u66f4\u65b0\u4e8b\u4ef6\uff0c\u9a71\u52a8 DMA0_CH4 \u4f20\u8f93\u3002DMA \u8bbe\u7f6e\u6210\u5185\u5b58\u5230\u5916\u8bbe\u6a21\u5f0f\uff0c\u5185\u5b58\u5730\u5740\u5373\u4e3a\u6570\u636e\u7f13\u51b2\u533a\u9996\u5730\u5740\uff0c\u5916\u8bbe\u5730\u5740\u8bbe\u7f6e\u4e3a SPI_DATA \u5bc4\u5b58\u5668\u3002\u5982\u6b64\u4e00\u6765 TIMER0 \u6bcf\u8f93\u51fa\u4e00\u4e2a\u66f4\u65b0\u4e8b\u4ef6\uff0cDMA0_CH4 \u5c31\u4f1a\u81ea\u52a8\u4ece\u5185\u5b58\u642c\u8fd0\u4e00\u6b21\u6570\u636e\u5230 SPI_DATA \u5bc4\u5b58\u5668\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"827\" height=\"326\" src=\"http:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/GD32F303-DMA0-request-20251209A.png\" alt=\"\" class=\"wp-image-2379\" srcset=\"https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/GD32F303-DMA0-request-20251209A.png 827w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/GD32F303-DMA0-request-20251209A-300x118.png 300w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/GD32F303-DMA0-request-20251209A-768x303.png 768w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/GD32F303-DMA0-request-20251209A-548x216.png 548w\" sizes=\"(max-width: 827px) 100vw, 827px\" \/><\/figure><\/div>\n\n\n<p>2\u3001TIMER0 \u505a\u4e3a\u4e3b\u5b9a\u65f6\u5668\uff0c\u6bcf\u8f93\u51fa\u4e00\u4e2a\u66f4\u65b0\u4e8b\u4ef6\uff0c\u9a71\u52a8 TIMER1\uff08\u4ece\u5b9a\u65f6\u5668\uff09\u7684\u8ba1\u6570\u5668\u52a0\u4e00\u3002\u4ece\u5b9a\u65f6\u5668\u8f93\u51fa PWM\uff0c\u4ee5 4 \u5b57\u8282\u53d1\u9001\u4e3a\u4f8b\uff0c\u5728\u524d 1\/5 \u5468\u671f\u5185\u8f93\u51fa\u9ad8\u7535\u5e73\uff0c4\/5 \u5468\u671f\u5185\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u5373\u53ef\u6a21\u62df\u51fa SPI_CS \u7247\u9009\u4fe1\u53f7\u3002\u5982\u679c\u662f 8 \u5b57\u8282\uff0c\u5219\u524d 1\/9 \u5468\u671f\u5185\u8f93\u51fa\u9ad8\u7535\u5e73\uff0c8\/9 \u5468\u671f\u5185\u8f93\u51fa\u4f4e\u7535\u5e73\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002<\/p>\n\n\n\n<p>3\u3001\u5177\u4f53\u65f6\u5e8f\u5982\u4e0b\u56fe\u6240\u793a\u3002\u4ece\u793a\u56fe\u53ef\u4ee5\u770b\u51fa\uff0c\u4e3b\u5b9a\u65f6\u5668\u6bcf\u8f93\u51fa\u4e00\u4e2a\u66f4\u65b0\u4e8b\u4ef6\uff0cSPI \u4ea7\u751f\u4e00\u6b21\u4f20\u8f93\u3002\u4f20\u8f93\u7b2c\u4e00\u4e2a\u5b57\u8282\u65f6\uff0c\u56e0\u4e3a SPI_CS \u7247\u9009\u4fe1\u53f7\u4e3a\u9ad8\u7535\u5e73\uff0c\u6240\u4ee5\u662f\u65e0\u6548\u7684\uff0c\u540e\u7eed 4 \u4e2a\u5b57\u8282\u624d\u4f1a\u88ab\u76ee\u6807\u8bbe\u5907\u6b63\u5e38\u63a5\u6536\u3002\u770b\u4f3c\u662f\u4f20\u8f93 4 \u5b57\u8282\uff0c\u5b9e\u9645\u4e0a\u53d1\u751f\u4e86 5 \u6b21\u4f20\u8f93\u3002\u8fd9\u91cc\u4f1a\u591a\u6d88\u8017\u4e00\u4e9b\u5185\u5b58\uff0c\u4f46\u5374\u6362\u6765\u4e86\u5168\u786c\u4ef6\u81ea\u52a8\u4f20\u8f93\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-1024x275.png\" alt=\"\" class=\"wp-image-2378\" style=\"width:1144px;height:307px\" width=\"1144\" height=\"307\" srcset=\"https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-1024x275.png 1024w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-300x81.png 300w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-768x206.png 768w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-1536x412.png 1536w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A-548x147.png 548w, https:\/\/www.huangrongzhen.ink\/wp-content\/uploads\/2025\/12\/SPI-Timing-20251209A.png 1710w\" sizes=\"(max-width: 1144px) 100vw, 1144px\" \/><\/figure><\/div>\n\n\n<p>\u6ce8\u610f\uff1a\u56e0\u4e3a SPI_CS \u4ea7\u751f\u4e0b\u964d\u6cbf\u540e\u7acb\u5373\u89e6\u53d1\u4e86 SPI \u4f20\u8f93\uff0c\u6240\u4ee5 SPI_SCK \u4fe1\u53f7\u6700\u597d\u662f\u914d\u7f6e\u6210\u7a7a\u95f2\u9ad8\u7535\u5e73\uff0c\u5728\u7b2c\u4e8c\u4e2a\u8df3\u53d8\u6cbf\u91c7\u6837\uff0c\u6216\u8005\u662f\u7a7a\u95f2\u4f4e\u7535\u5e73\uff0c\u7b2c\u4e8c\u4e2a\u8df3\u53d8\u6cbf\u91c7\u6837\u3002\u4e3a SPI \u4f20\u8f93\u7b2c\u4e00\u4e2a bit \u4e0e SPI_CS \u4e0b\u964d\u6cbf\u4e4b\u95f4\u62c9\u5f00\u4e00\u70b9\u95f4\u9694\u3002<\/p>\n\n\n\n<p>\u8c03\u8bd5\u65f6\uff0c\u5efa\u8bae\u4f7f\u7528\u903b\u8f91\u5206\u6790\u4eea\uff0c\u9996\u5148\u67e5\u770b SPI_CS \u4fe1\u53f7\u662f\u5426\u6b63\u5e38\u4ea7\u751f\uff1b\u7136\u540e\u89c2\u5bdf\uff0c\u4f8b\u5982\u793a\u56fe\u201c\u5b57\u8282 1\u201d\u548c\u201c\u5b57\u8282 2\u201d\u4e4b\u95f4\u662f\u5426\u6709\u7a7a\u95f2\u95f4\u9694\uff1b\u4ee5\u53ca\u4e00\u4e2a SPI_CS \u4f4e\u7535\u5e73\u671f\u95f4\u4f20\u8f93\u7684\u5b57\u8282\u6570\u662f\u5426\u6b63\u786e\u3002\u5982\u679c\u5404\u4e2a\u5b57\u8282\u4e4b\u95f4\u6ca1\u6709\u7a7a\u95f2\u95f4\u9694\uff0c\u8bf4\u660e\u786c\u4ef6 SPI  \u7684\u9884\u5206\u9891\u53c2\u6570\u8bbe\u7f6e\u6709\u8bef\u3002<\/p>\n\n\n\n<p>\u9a71\u52a8\u5934\u6587\u4ef6\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"c\" class=\"language-c\">\/*********************************************************************************************************\n* \u6a21\u5757\u540d\u79f0\uff1a SPISendAnyByte.h\n* \u6458    \u8981\uff1a \u786c\u4ef6 SPI \u53d1\u9001\u9a71\u52a8\uff0c\u652f\u6301\u4efb\u610f\u5b57\u8282\n* \u5f53\u524d\u7248\u672c\uff1a 1.0.0\n* \u4f5c    \u8005\uff1a SZLY(COPYRIGHT 2018 - 2020 SZLY. All rights reserved.)\n* \u5b8c\u6210\u65e5\u671f\uff1a 2025\u5e7412\u670809\u65e5 \n* \u5185    \u5bb9\uff1a\n* \u6ce8    \u610f\uff1a\n**********************************************************************************************************\n* \u53d6\u4ee3\u7248\u672c\uff1a\n* \u4f5c    \u8005\uff1a\n* \u5b8c\u6210\u65e5\u671f\uff1a\n* \u4fee\u6539\u5185\u5bb9\uff1a\n* \u4fee\u6539\u6587\u4ef6\uff1a\n*********************************************************************************************************\/\n#ifndef _SPI_SEND_ANY_BYTE_H_\n#define _SPI_SEND_ANY_BYTE_H_\n\n\/*********************************************************************************************************\n*                                              \u5305\u542b\u5934\u6587\u4ef6\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              \u5b8f\u5b9a\u4e49\n*********************************************************************************************************\/\n\n\/\/\u5e27\u5927\u5c0f\n#define SPI_SEND_ANY_BYTE_FRAME_SIZE (4)\n\n\/\/\u4e3b\u5b9a\u65f6\u5668\u914d\u7f6e\n#define SPI_SEND_ANY_BYTE_TIMER_PRESCALER (119)\n#define SPI_SEND_ANY_BYTE_TIMER_PERIOD    (999)\n\n\/*********************************************************************************************************\n*                                              \u679a\u4e3e\u7ed3\u6784\u4f53\u5b9a\u4e49\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              API\u51fd\u6570\u58f0\u660e\n*********************************************************************************************************\/\n\/\/\u786c\u4ef6 SPI \u9a71\u52a8\nvoid InitSPISendAnyByte(void);\n\n\/\/\u4f20\u8f93\u76f8\u5173\nvoid SPISendAnyByteTransmitStop(void);              \/\/\u505c\u6b62\u4f20\u8f93\nvoid SPISendAnyByteTransmitClear(void);             \/\/\u7f13\u51b2\u533a\u6e05\u7a7a\nvoid SPISendAnyByteSetData(unsigned char sendByte); \/\/\u8bbe\u7f6e\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\nvoid SPISendAnyByteTransmitStart(void);             \/\/\u542f\u52a8\u4f20\u8f93\n\n#endif\n<\/code><\/pre>\n\n\n\n<p>\u9a71\u52a8\u6e90\u6587\u4ef6\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"c\" class=\"language-c\">\/*********************************************************************************************************\n* \u6a21\u5757\u540d\u79f0\uff1a SPISendAnyByte.c\n* \u6458    \u8981\uff1a \u786c\u4ef6 SPI \u53d1\u9001\u9a71\u52a8\uff0c\u652f\u6301\u4efb\u610f\u5b57\u8282\n* \u5f53\u524d\u7248\u672c\uff1a 1.0.0\n* \u4f5c    \u8005\uff1a SZLY(COPYRIGHT 2018 - 2020 SZLY. All rights reserved.)\n* \u5b8c\u6210\u65e5\u671f\uff1a 2025\u5e7412\u670809\u65e5 \n* \u5185    \u5bb9\uff1a\n* \u6ce8    \u610f\uff1a\n**********************************************************************************************************\n* \u53d6\u4ee3\u7248\u672c\uff1a\n* \u4f5c    \u8005\uff1a\n* \u5b8c\u6210\u65e5\u671f\uff1a\n* \u4fee\u6539\u5185\u5bb9\uff1a\n* \u4fee\u6539\u6587\u4ef6\uff1a\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              \u5305\u542b\u5934\u6587\u4ef6\n*********************************************************************************************************\/\n#include \"SPISendAnyByte.h\"\n#include \"gd32f30x_conf.h\"\n#include \"SysTick.h\"\n\n\/*********************************************************************************************************\n*                                              \u5b8f\u5b9a\u4e49\n*********************************************************************************************************\/\n#define DAC_POINT_COUNT (2048)\n\n\/*********************************************************************************************************\n*                                              \u679a\u4e3e\u7ed3\u6784\u4f53\u5b9a\u4e49\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              \u5185\u90e8\u53d8\u91cf\n*********************************************************************************************************\/\n\/\/ DAC \u6570\u636e\u7f13\u51b2\u533a\nstatic __attribute__((aligned(4))) uint8_t s_arrSPISendBuffer[DAC_POINT_COUNT]; \n\n\/\/DAC \u6570\u636e\u91cf\u8ba1\u6570\u5668\nstatic unsigned int s_iDMABufferLen = 0;\n\n\/*********************************************************************************************************\n*                                              \u5185\u90e8\u51fd\u6570\u58f0\u660e\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              \u5185\u90e8\u51fd\u6570\u5b9e\u73b0\n*********************************************************************************************************\/\n\n\/*********************************************************************************************************\n*                                              API\u51fd\u6570\u5b9e\u73b0\n*********************************************************************************************************\/\n\/*********************************************************************************************************\n* \u51fd\u6570\u540d\u79f0\uff1a InitSPISendAnyByte\n* \u51fd\u6570\u529f\u80fd\uff1a \u786c\u4ef6 SPI \u9a71\u52a8\n* \u8f93\u5165\u53c2\u6570\uff1a void\n* \u8f93\u51fa\u53c2\u6570\uff1a void\n* \u8fd4 \u56de \u503c\uff1a void\n* \u521b\u5efa\u65e5\u671f\uff1a 2025\u5e7412\u670809\u65e5 \n* \u6ce8    \u610f\uff1a \n*********************************************************************************************************\/\nvoid InitSPISendAnyByte(void)\n{\n  \/\/\u521d\u59cb\u5316\u7ed3\u6784\u4f53\n  spi_parameter_struct spi_init_struct;\n  timer_parameter_struct timer_initpara;\n  timer_oc_parameter_struct timer_ocinitpara;\n  \n  \/\/\u5176\u5b83\u53d8\u91cf\n  unsigned long long i;\n\n  \/\/\u4f7f\u80fd RCU \u76f8\u5173\u65f6\u949f\n  rcu_periph_clock_enable(RCU_GPIOB);  \/\/\u4f7f\u80fd GPIOB \u7684\u65f6\u949f\n  rcu_periph_clock_enable(RCU_AF);     \/\/\u4f7f\u80fd AF \u7684\u65f6\u949f\n\n  \/\/\u88c5\u586b DMA \u7f13\u51b2\u533a\n  for(i = 0; i &lt; DAC_POINT_COUNT; i++) { s_arrSPISendBuffer[i] = i; }\n\n\/*********************************************************************************************************\n*                                              \u914d\u7f6e SPI\n*********************************************************************************************************\/\n  \/\/\u4f7f\u80fd SPI1 \u7684\u65f6\u949f\n  rcu_periph_clock_enable(RCU_SPI1);\n\n  \/\/SPI GPIO\n  gpio_init(GPIOB, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_12); \/\/SPI NSS\uff08\u4e0d\u7528\uff09\n  gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_MAX, GPIO_PIN_13); \/\/SPI_SCK\n  gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_MAX, GPIO_PIN_14); \/\/SPI_MISO\n  gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_MAX, GPIO_PIN_15); \/\/SPI_MOSI\n\n  \/\/\u914d\u7f6e SPI\n  spi_i2s_deinit(SPI1);\n  spi_struct_para_init(&amp;spi_init_struct);\n  spi_init_struct.device_mode          = SPI_MASTER;               \/\/SPI \u4e3b\u673a\n  spi_init_struct.trans_mode           = SPI_TRANSMODE_FULLDUPLEX; \/\/\u5168\u53cc\u5de5\u6a21\u5f0f\n  spi_init_struct.frame_size           = SPI_FRAMESIZE_8BIT;       \/\/8 \u4f4d\u6570\u636e\u5e27\n  spi_init_struct.nss                  = SPI_NSS_SOFT;             \/\/\u8f6f\u4ef6\u7ba1\u7406 NSS\uff08\u7247\u9009\uff09\n  spi_init_struct.endian               = SPI_ENDIAN_MSB;           \/\/\u9ad8\u4f4d\u5728\u524d\uff0c\u4f4e\u4f4d\u5728\u540e\u6570\u636e\u4f4d\u987a\u5e8f\n  spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE;  \/\/\u65f6\u949f\u4fe1\u53f7\u4e0a\u5347\u6cbf\u6709\u6548\u4e14\u7b2c\u4e8c\u4e2a\u65f6\u949f\u8df3\u53d8\u6cbf\u4e3a\u6709\u6548\u91c7\u6837\u8fb9\u6cbf\n  spi_init_struct.prescale             = SPI_PSC_8;                \/\/\u65f6\u949f\u5206\u9891\u7cfb\u6570\uff08\u7531 SYSCLK \u5206\u9891\uff09\n  spi_init(SPI1, &amp;spi_init_struct);                                \/\/\u6839\u636e\u53c2\u6570\u914d\u7f6e SPI1\n  spi_crc_polynomial_set(SPI1, 7);                                 \/\/\u914d\u7f6e\u786c\u4ef6 CRC \u8ba1\u7b97\n  spi_disable(SPI1);                                               \/\/\u9ed8\u8ba4\u7981\u7528 SPI \u8bbe\u5907\n\n\/*********************************************************************************************************\n*                       \u914d\u7f6e\u4e3b\u5b9a\u65f6\u5668\uff0c\u7528\u4e8e\u8f93\u51fa\u66f4\u65b0\u4e8b\u4ef6\u9a71\u52a8 DMA \u4f20\u8f93\uff0c\u4ee5\u53ca\u4ece\u5b9a\u65f6\u5668\u8ba1\u6570\u5668\u52a0\u4e00\n*********************************************************************************************************\/\n  \/\/\u4f7f\u80fd TIMER0 \u7684\u65f6\u949f\n  rcu_periph_clock_enable(RCU_TIMER0); \n\n  \/\/\u590d\u4f4d\u5b9a\u65f6\u5668\n  timer_deinit(TIMER0);\n  \n  \/\/\u5b9a\u65f6\u5668\u57fa\u7840\u914d\u7f6e\n  timer_struct_para_init(&amp;timer_initpara);\n  timer_initpara.prescaler = SPI_SEND_ANY_BYTE_TIMER_PRESCALER;\n  timer_initpara.alignedmode = TIMER_COUNTER_EDGE;\n  timer_initpara.counterdirection = TIMER_COUNTER_UP;\n  timer_initpara.period = SPI_SEND_ANY_BYTE_TIMER_PERIOD;\n  timer_initpara.clockdivision = TIMER_CKDIV_DIV1;\n  timer_initpara.repetitioncounter = 0;\n  timer_init(TIMER0, &amp;timer_initpara);\n\n  \/\/\u4f7f\u80fd TIMER0 \u4e3b\u6a21\u5f0f\u8f93\u51fa\u89e6\u53d1\n  timer_master_output_trigger_source_select(TIMER0, TIMER_TRI_OUT_SRC_UPDATE);\n\n  \/\/\u4f7f\u80fd TIMER0 \u81ea\u52a8\u91cd\u88c5\u8f7d\u9884\u88c5\u8f7d\n  timer_auto_reload_shadow_enable(TIMER0); \n  \n  \/\/\u914d\u7f6e\u5b9a\u65f6\u5668\u66f4\u65b0\u4e8b\u4ef6\u89e6\u53d1 DMA\n  timer_dma_enable(TIMER0, TIMER_DMA_UPD);\n\n  \/\/\u6682\u4e0d\u4f7f\u80fd\u4e3b\u5b9a\u65f6\u5668\n  timer_disable(TIMER0);\n\n\/*********************************************************************************************************\n*                                  \u914d\u7f6e\u4ece\u5b9a\u65f6\u5668\uff0c\u7528\u4e8e\u8f93\u51fa\u7247\u9009\u4fe1\u53f7\n*********************************************************************************************************\/\n  \/\/\u4f7f\u80fd TIMER1 \u7684\u65f6\u949f\n  rcu_periph_clock_enable(RCU_TIMER1); \n\n  \/\/TIMER1_CH2\uff0c\u7528\u4f5c SPI \u7684 NSS\n  gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10);\n  gpio_pin_remap_config(GPIO_TIMER1_FULL_REMAP, ENABLE);\n\n  \/\/\u590d\u4f4d\u5b9a\u65f6\u5668\n  timer_deinit(TIMER1);\n  \n  \/\/\u5b9a\u65f6\u5668\u57fa\u7840\u914d\u7f6e\n  timer_struct_para_init(&amp;timer_initpara);\n  timer_initpara.prescaler = 0;  \/\/\u9884\u5206\u9891\u8981\u8bbe\u7f6e\u4e3a 0\n  timer_initpara.alignedmode = TIMER_COUNTER_EDGE;\n  timer_initpara.counterdirection = TIMER_COUNTER_UP;\n  timer_initpara.period = SPI_SEND_ANY_BYTE_FRAME_SIZE;\n  timer_initpara.clockdivision = TIMER_CKDIV_DIV1;\n  timer_initpara.repetitioncounter = 0;\n  timer_init(TIMER1, &amp;timer_initpara);\n\n  \/\/\u914d\u7f6eTIMER1\u4e3a\u4ece\u6a21\u5f0f\uff0c\u89e6\u53d1\u6e90\u4e3aITI0\uff08TIMER0\u7684\u66f4\u65b0\u4e8b\u4ef6\uff09\n  timer_slave_mode_select(TIMER1, TIMER_SLAVE_MODE_EXTERNAL0);\n  timer_input_trigger_source_select(TIMER1, TIMER_SMCFG_TRGSEL_ITI0);\n  \n  \/\/PWM\u914d\u7f6e\uff0cTIMER1_CH2\uff0c\u8f93\u51fa SPI_NSS\n  timer_channel_output_struct_para_init(&amp;timer_ocinitpara);\n  timer_ocinitpara.ocpolarity  = TIMER_OC_POLARITY_HIGH;                    \/\/\u8f93\u51fa\u6781\u6027\uff1a\u9ad8\u7535\u5e73\u6709\u6548\uff08\u4f46\u5b9e\u9645\u4f4e\u7535\u5e73\u6709\u6548\u6a21\u5f0f\uff09\n  timer_ocinitpara.outputstate = TIMER_CCX_ENABLE;                          \/\/\u4f7f\u80fd\u901a\u9053\u8f93\u51fa\n  timer_ocinitpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;                   \/\/\u4e92\u8865\u8f93\u51fa\u6781\u6027\n  timer_ocinitpara.outputnstate = TIMER_CCXN_DISABLE;                       \/\/\u7981\u7528\u4e92\u8865\u8f93\u51fa\n  timer_ocinitpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;                  \/\/\u7a7a\u95f2\u72b6\u6001\n  timer_ocinitpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;                 \/\/\u4e92\u8865\u901a\u9053\u7a7a\u95f2\u72b6\u6001\n  timer_channel_output_config(TIMER1, TIMER_CH_2, &amp;timer_ocinitpara);       \/\/\u914d\u7f6e PWM\n  timer_channel_output_mode_config(TIMER1, TIMER_CH_2, TIMER_OC_MODE_PWM0); \/\/PWM\u6a21\u5f0f0\n  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 1);           \/\/\u914d\u7f6e\u5360\u7a7a\u6bd4\n  \n  \/\/\u4f7f\u80fdTIMER1\u81ea\u52a8\u91cd\u88c5\u8f7d\u9884\u88c5\u8f7d\n  timer_auto_reload_shadow_enable(TIMER1); \n\n  \/\/\u9ed8\u8ba4\u5b9a\u65f6\u5668\u5173\u95ed\n  timer_disable(TIMER1);\n}\n\n\/*********************************************************************************************************\n* \u51fd\u6570\u540d\u79f0\uff1aSPISendAnyByteTransmitStop\n* \u51fd\u6570\u529f\u80fd\uff1a\u6682\u505c\u4f20\u8f93\n* \u8f93\u5165\u53c2\u6570\uff1avoid \n* \u8f93\u51fa\u53c2\u6570\uff1avoid\n* \u8fd4 \u56de \u503c\uff1avoid\n* \u521b\u5efa\u65e5\u671f\uff1a2025\u5e7412\u670809\u65e5\n* \u6ce8    \u610f\uff1a\n*********************************************************************************************************\/\nvoid SPISendAnyByteTransmitStop(void)\n{\n  \/\/\u7981\u6b62\u5b9a\u65f6\u5668\u5de5\u4f5c\n  timer_disable(TIMER0);\n  timer_disable(TIMER1);\n\n  \/\/\u5173\u95ed DMA \u4f20\u8f93\n  dma_channel_disable(DMA0, DMA_CH4);\n\n  \/\/\u5173\u95ed SPI\n  spi_disable(SPI1);\n}\n\n\/*********************************************************************************************************\n* \u51fd\u6570\u540d\u79f0\uff1aSPISendAnyByteTransmitClear\n* \u51fd\u6570\u529f\u80fd\uff1a\u6e05\u7a7a\u53d1\u9001\u7f13\u51b2\u533a\n* \u8f93\u5165\u53c2\u6570\uff1avoid \n* \u8f93\u51fa\u53c2\u6570\uff1avoid\n* \u8fd4 \u56de \u503c\uff1avoid\n* \u521b\u5efa\u65e5\u671f\uff1a2025\u5e7412\u670809\u65e5\n* \u6ce8    \u610f\uff1a\n*********************************************************************************************************\/\nvoid SPISendAnyByteTransmitClear(void)\n{\n  s_iDMABufferLen = 0;\n}\n\n\/*********************************************************************************************************\n* \u51fd\u6570\u540d\u79f0\uff1aSPISendAnyByteSetData\n* \u51fd\u6570\u529f\u80fd\uff1a\u8bbe\u7f6e\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\n* \u8f93\u5165\u53c2\u6570\uff1avoid \n* \u8f93\u51fa\u53c2\u6570\uff1avoid\n* \u8fd4 \u56de \u503c\uff1avoid\n* \u521b\u5efa\u65e5\u671f\uff1a2025\u5e7412\u670808\u65e5\n* \u6ce8    \u610f\uff1a\n*********************************************************************************************************\/\nvoid SPISendAnyByteSetData(unsigned char sendByte)\n{\n  \/\/\u8bbe\u7f6e\u5e27\u5185\u65e0\u6548\u5b57\u8282\n  if(0 == (s_iDMABufferLen % (SPI_SEND_ANY_BYTE_FRAME_SIZE + 1)))\n  {\n    s_arrSPISendBuffer[s_iDMABufferLen] = 0xFF;\n    s_iDMABufferLen = (s_iDMABufferLen + 1) % DAC_POINT_COUNT;\n  }\n\n  \/\/\u4fdd\u5b58\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\n  s_arrSPISendBuffer[s_iDMABufferLen] = sendByte;\n\n  \/\/\u6570\u636e\u91cf\u8ba1\u6570\u52a0\u4e00\n  s_iDMABufferLen = (s_iDMABufferLen + 1) % DAC_POINT_COUNT;\n}\n\n\/*********************************************************************************************************\n* \u51fd\u6570\u540d\u79f0\uff1aSPISendAnyByteTransmitStart\n* \u51fd\u6570\u529f\u80fd\uff1a\u542f\u52a8\u4f20\u8f93\n* \u8f93\u5165\u53c2\u6570\uff1avoid \n* \u8f93\u51fa\u53c2\u6570\uff1avoid\n* \u8fd4 \u56de \u503c\uff1avoid\n* \u521b\u5efa\u65e5\u671f\uff1a2025\u5e7412\u670808\u65e5\n* \u6ce8    \u610f\uff1a\n*          \u542f\u52a8\u4f20\u8f93\u9700\u8981\u7ecf\u5386\u4ee5\u4e0b\u6b65\u9aa4\n*          1\u3001\u901a\u8fc7 SPISendAnyByteTransmitStop() \u505c\u6b62\u4f20\u8f93\n*          2\u3001\u901a\u8fc7 SPISendAnyByteTransmitClear() \u6e05\u7a7a\u53d1\u9001\u7f13\u51b2\u533a\n*          3\u3001\u901a\u8fc7 SPISendAnyByteSetData() \u8bbe\u7f6e\u6ce2\u5f62\u6570\u636e\n*          4\u3001\u901a\u8fc7 SPISendAnyByteTransmitStart() \u542f\u52a8\u4f20\u8f93\n*********************************************************************************************************\/\nvoid SPISendAnyByteTransmitStart(void)\n{\n  dma_parameter_struct dma_init_struct;\n\n  \/\/\u7981\u6b62\u6240\u6709\u4f20\u8f93\n  SPISendAnyByteTransmitStop();\n\n  \/\/\u91cd\u65b0\u914d\u7f6e DMA \u4f20\u8f93\uff08\u56e0\u4e3a\u6ca1\u6709\u627e\u5230\u6e05\u7a7a DMA \u4f20\u8f93\u8ba1\u6570\u5668\u7684\u65b9\u5f0f\uff0c\u5c31\u91cd\u65b0\u914d\u7f6e\u4e86\uff09\n  \/\/TIMER0 \u66f4\u65b0\u4e8b\u4ef6\u89e6\u53d1\n  rcu_periph_clock_enable(RCU_DMA0);\n  dma_deinit(DMA0, DMA_CH4);\n  dma_struct_para_init(&amp;dma_init_struct);\n  dma_init_struct.periph_addr = (uint32_t)&amp;SPI_DATA(SPI1);\n  dma_init_struct.memory_addr = (uint32_t)s_arrSPISendBuffer;\n  dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;\n  dma_init_struct.number = s_iDMABufferLen;\n  dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;\n  dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;\n  dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_8BIT;\n  dma_init_struct.memory_width = DMA_MEMORY_WIDTH_8BIT;\n  dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;\n  dma_init(DMA0, DMA_CH4, &amp;dma_init_struct);\n  dma_circulation_enable(DMA0, DMA_CH4); \/\/\u4f7f\u80fd\u5faa\u73af\u6a21\u5f0f\uff08\u53ef\u6539\u4e3a\u5355\u6b21\u6a21\u5f0f\uff0c\u4e00\u6b21\u53ea\u53d1\u9001\u4e00\u6279\u6570\u636e\uff09\n\n  \/\/\u4f7f\u80fd SPI \u5916\u8bbe\n  spi_enable(SPI1);\n\n  \/\/\u4f7f\u80fd DMA \u4f20\u8f93\n  dma_channel_enable(DMA0, DMA_CH4);\n\n  \/\/\u4f7f\u80fd\u5b9a\u65f6\u5668\uff0c\u5f00\u542f\u4f20\u8f93\n  timer_counter_value_config(TIMER1, SPI_SEND_ANY_BYTE_FRAME_SIZE); \/\/DMA \u53d1\u9001\u6570\u636e\u65f6\uff0c\u504f\u79fb\u4e86\u4e00\u4e2a\u5b57\u8282\uff0c\u9700\u8981\u8c03\u56de\n  timer_counter_value_config(TIMER0, 0);\n  timer_enable(TIMER1);\n  timer_enable(TIMER0);\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528\u5b9a\u65f6\u5668\u4e3b\u4ece\u6a21\u5f0f\uff0c\u914d\u5408 DMA \u548c\u786c\u4ef6 SPI\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5355\u4e2a\u7247\u9009\u5185\u53d1\u9001\u4efb\u610f\u591a\u4e2a\u5b57\u8282\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/2377"}],"collection":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2377"}],"version-history":[{"count":6,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/2377\/revisions"}],"predecessor-version":[{"id":2387,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/2377\/revisions\/2387"}],"wp:attachment":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}