【转载】嵌入式开发（BL618芯片）定时器中断建构

版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。 本文链接：[https://blog.csdn.net/weixin_64069585/article/details/130900203](https://blog.csdn.net/weixin_64069585/article/details/130900203) ———————————————— 版权声明：本文为CSDN博主「maeve1228」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。 原文链接：[https://blog.csdn.net/weixin_64069585/article/details/130900203](https://blog.csdn.net/weixin_64069585/article/details/130900203) # 嵌入式开发（BL618芯片）定时器中断建构 ## 概要 选择的开发环境为：vscode 开发板为：BL618 串口调试助手 整体架构流程 vscode程序开发编译步骤： ``` 使用make CHIP=bl616 使用make flash COMX=comX(X是你开发板链接的端口，打开设备管理器查看即可） 使用riscv64-unknown-elf-gdb进行命令行下的调试，进入gdb进行详细配置 ``` ## 技术细节 链接好开发板之后进入vscode，编写一个c程序，例如 ``` #include "bflb_mtimer.h" #include "board.h" #define DBG_TAG "MAIN" #include "log.h" int main(void) { board_init(); while (1) { LOG_F("hello world fatal\r\n"); LOG_E("hello world error\r\n"); LOG_W("hello world warning\r\n"); LOG_I("hello world information\r\n"); LOG_D("hello world debug\r\n"); LOG_T("hello world trace\r\n"); LOG_RF("hello world fatal raw\r\n"); LOG_RE("hello world error raw\r\n"); LOG_RW("hello world warning raw\r\n"); LOG_RI("hello world information raw\r\n"); LOG_RD("hello world debug raw\r\n"); LOG_RT("hello world trace raw\r\n"); bflb_mtimer_delay_ms(1000); } } ``` 然后将文件目录定位到当前目录，在vscode里，可以直接用powershell或者可以打开终端来进行以下操作： ``` make CHIP=bl616 使用make flash COMX=com5（我的端口号为5） 接下来打开串口调试助手，确认好端口等，这里有一点很重要的是：波特率的设定，必须设置为2000000（否则会出现乱码，别问我怎么知道的呜呜呜） ``` 然后确定好之后点击开发板上的RST复位键，就输出内容了  在powershell里面进行命令编写的时候，我们也可以换个写法： 1. make CHIP=bl618 BOARD=bl618g0 2. make flash COMX=com5 同样的，打开串口调试器，你依旧可以得到以上一样的结果 ) ### 开发板设备代码详细信息 ``` #include "bflb_core.h" #include "bl616_memorymap.h" #include "bl616_irq.h" #define DMA_CHANNEL_OFFSET 0x100 struct bflb_device_s bl616_device_table[] = { { .name = "adc", .reg_base = AON_BASE, .irq_num = BL616_IRQ_GPADC_DMA, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_ADC, .user_data = NULL }, { .name = "dac", .reg_base = GLB_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_DAC, .user_data = NULL }, { .name = "ef_ctrl", .reg_base = EF_CTRL_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_EF_CTRL, .user_data = NULL }, { .name = "gpio",//名字 .reg_base = GLB_BASE,//寄存器基地址 .irq_num = BL616_IRQ_GPIO_INT0,//中端向量号 .idx = 0,//索引 .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_GPIO,//设备类型 .user_data = NULL },//通过这些东西可以找到设备 { .name = "uart0", .reg_base = UART0_BASE, .irq_num = BL616_IRQ_UART0, .idx = 0, .dev_type = BFLB_DEVICE_TYPE_UART, .user_data = NULL }, { .name = "uart1", .reg_base = UART1_BASE, .irq_num = BL616_IRQ_UART1, .idx = 1, .dev_type = BFLB_DEVICE_TYPE_UART, .user_data = NULL }, { .name = "spi0", .reg_base = SPI_BASE, .irq_num = BL616_IRQ_SPI0, .idx = 0, .dev_type = BFLB_DEVICE_TYPE_SPI, .user_data = NULL }, { .name = "pwm_v2_0", .reg_base = PWM_BASE, .irq_num = BL616_IRQ_PWM, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PWM, .user_data = NULL }, { .name = "dma0_ch0", .reg_base = DMA_BASE + 1 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch1", .reg_base = DMA_BASE + 2 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 1, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch2", .reg_base = DMA_BASE + 3 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 2, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch3", .reg_base = DMA_BASE + 4 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 3, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch4", .reg_base = DMA_BASE + 5 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 4, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch5", .reg_base = DMA_BASE + 6 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 5, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch6", .reg_base = DMA_BASE + 7 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 6, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "dma0_ch7", .reg_base = DMA_BASE + 8 * DMA_CHANNEL_OFFSET, .irq_num = BL616_IRQ_DMA0_ALL, .idx = 0, .sub_idx = 7, .dev_type = BFLB_DEVICE_TYPE_DMA, .user_data = NULL }, { .name = "i2c0", .reg_base = I2C0_BASE, .irq_num = BL616_IRQ_I2C0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_I2C, .user_data = NULL }, { .name = "i2c1", .reg_base = I2C1_BASE, .irq_num = BL616_IRQ_I2C1, .idx = 1, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_I2C, .user_data = NULL }, { .name = "i2s0", .reg_base = I2S_BASE, .irq_num = BL616_IRQ_I2S, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_I2S, .user_data = NULL }, { .name = "timer0", .reg_base = TIMER_BASE, .irq_num = BL616_IRQ_TIMER0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_TIMER, .user_data = NULL }, { .name = "timer1", .reg_base = TIMER_BASE, .irq_num = BL616_IRQ_TIMER1, .idx = 1, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_TIMER, .user_data = NULL }, { .name = "rtc", .reg_base = HBN_BASE, .irq_num = BL616_IRQ_HBN_OUT0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_RTC, .user_data = NULL }, { .name = "aes", .reg_base = SEC_ENG_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_AES, .user_data = NULL }, { .name = "sha", .reg_base = SEC_ENG_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_SHA, .user_data = NULL }, { .name = "trng", .reg_base = SEC_ENG_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_TRNG, .user_data = NULL }, { .name = "pka", .reg_base = SEC_ENG_BASE, .irq_num = 0xff, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PKA, .user_data = NULL }, { .name = "emac0", .reg_base = EMAC_BASE, .irq_num = BL616_IRQ_EMAC, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_ETH, .user_data = NULL }, { .name = "watchdog", .reg_base = TIMER_BASE, .irq_num = BL616_IRQ_WDG, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_TIMER, .user_data = NULL }, { .name = "cks", .reg_base = CKS_BASE, .irq_num = 0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_CKS, .user_data = NULL }, { .name = "mjpeg", .reg_base = MJPEG_BASE, .irq_num = BL616_IRQ_MJPEG, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_MJPEG, .user_data = NULL }, { .name = "irrx", .reg_base = IR_BASE, .irq_num = BL616_IRQ_IRRX, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_IR, .user_data = NULL }, { .name = "cam0", .reg_base = DVP2AXI0_BASE, .irq_num = BL616_IRQ_DVP2BUS_INT0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_CAMERA, .user_data = NULL }, { .name = "cam1", .reg_base = DVP2AXI1_BASE, .irq_num = BL616_IRQ_DVP2BUS_INT1, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_CAMERA, .user_data = NULL }, { .name = "auadc", .reg_base = AUADC_BASE, .irq_num = BL616_IRQ_AUADC, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_AUDIOADC, .user_data = NULL }, { .name = "audac", .reg_base = AUDAC_BASE, .irq_num = BL616_IRQ_AUDAC, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_AUDIODAC, .user_data = NULL }, { .name = "sdio2", .reg_base = SDU_BASE, .irq_num = BL616_IRQ_SDIO, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_SDIO2, .user_data = NULL }, { .name = "dbi", .reg_base = DBI_BASE, .irq_num = BL616_IRQ_DBI, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_DBI, .user_data = NULL }, { .name = "plfm_dma_ch0", .reg_base = PLFM_DMA_BASE, .irq_num = 0, .idx = 0, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PLFMDMA, .user_data = NULL }, { .name = "plfm_dma_ch1", .reg_base = PLFM_DMA_BASE, .irq_num = 0, .idx = 1, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PLFMDMA, .user_data = NULL }, { .name = "plfm_dma_ch2", .reg_base = PLFM_DMA_BASE, .irq_num = 0, .idx = 2, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PLFMDMA, .user_data = NULL }, { .name = "plfm_dma_ch3", .reg_base = PLFM_DMA_BASE, .irq_num = 0, .idx = 3, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PLFMDMA, .user_data = NULL }, { .name = "plfm_dma_ch4", .reg_base = PLFM_DMA_BASE, .irq_num = 0, .idx = 4, .sub_idx = 0, .dev_type = BFLB_DEVICE_TYPE_PLFMDMA, .user_data = NULL }, }; struct bflb_device_s *bflb_device_get_by_name(const char *name) { for (uint8_t i = 0; i < sizeof(bl616_device_table) / sizeof(bl616_device_table[0]); i++) { if (strcmp(bl616_device_table[i].name, name) == 0) { return &bl616_device_table[i]; } } return NULL; } struct bflb_device_s *bflb_device_get_by_id(uint8_t type, uint8_t idx) { for (uint8_t i = 0; i < sizeof(bl616_device_table) / sizeof(bl616_device_table[0]); i++) { if ((bl616_device_table[i].dev_type == type) && (bl616_device_table[i].idx = idx)) { return &bl616_device_table[i]; } } return NULL; } void bflb_device_set_userdata(struct bflb_device_s *device, void *user_data) { device->user_data = user_data; } ``` 其中，我们可以根据每一块的基本数据内容来对设备进行访问，例如：  ### 博流计时器 博流618内部有两个定时器，分别为定时器1和定时器0，每个定时器里会有三个比较器，每个比较器的值到达的时候就会产生硬件中断，那么我们把响应的中断来修改相应的GPIO的输出，由此可将两个样例结合。 首先完成gpio的配置：     计时器和比较器对gpio的代码： ``` #include "bflb_mtimer.h" #include "bflb_timer.h" #include "board.h" #define TEST_TIMER_COMP_ID TIMER_COMP_ID_2 struct bflb_device_s *timer0; struct bflb_device_s *timer1; void timer0_isr(int irq, void *arg) { bool status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_0); if (status) { bflb_timer_compint_clear(timer0, TIMER_COMP_ID_0); printf("timer0 comp0 trigger\r\n"); } status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_1); if (status) { bflb_timer_compint_clear(timer0, TIMER_COMP_ID_1); printf("timer0 comp1 trigger\r\n"); } status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_2); if (status) { bflb_timer_compint_clear(timer0, TIMER_COMP_ID_2); printf("timer0 comp2 trigger\r\n"); } } void timer1_isr(int irq, void *arg) { bool status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_0); if (status) { bflb_timer_compint_clear(timer1, TIMER_COMP_ID_0); printf("timer1 comp0 trigger\r\n"); } status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_1); if (status) { bflb_timer_compint_clear(timer1, TIMER_COMP_ID_1); printf("timer1 comp1 trigger\r\n"); } status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_2); if (status) { bflb_timer_compint_clear(timer1, TIMER_COMP_ID_2); printf("timer1 comp2 trigger\r\n"); } } int main(void) { board_init(); printf("Timer basic test\n"); /* timer clk = XCLK/(div + 1 )*/ struct bflb_timer_config_s cfg0; cfg0.counter_mode = TIMER_COUNTER_MODE_PROLOAD; /* preload when match occur */ cfg0.clock_source = TIMER_CLKSRC_XTAL; cfg0.clock_div = 39; /* for bl616/bl808/bl606p is 39, for bl702 is 31 */ cfg0.trigger_comp_id = TEST_TIMER_COMP_ID; cfg0.comp0_val = 1000000; /* match value 0 */ cfg0.comp1_val = 1500000; /* match value 1 */ cfg0.comp2_val = 2500000; /* match value 2 */ cfg0.preload_val = 0; /* preload value */ struct bflb_timer_config_s cfg1; cfg1.counter_mode = TIMER_COUNTER_MODE_PROLOAD; cfg1.clock_source = TIMER_CLKSRC_XTAL; cfg1.clock_div = 39; /* for bl616/bl808/bl606p is 39, for bl702 is 31 */ cfg1.trigger_comp_id = TEST_TIMER_COMP_ID; cfg1.comp0_val = 1000000; /* match value 0 */ cfg1.comp1_val = 1500000; /* match value 1 */ cfg1.comp2_val = 2500000; /* match value 2 */ cfg1.preload_val = 0; /* preload value */ timer0 = bflb_device_get_by_name("timer0"); timer1 = bflb_device_get_by_name("timer1"); /* Timer init with default configuration */ bflb_timer_init(timer0, &cfg0); bflb_timer_init(timer1, &cfg1); bflb_irq_attach(timer0->irq_num, timer0_isr, NULL); bflb_irq_attach(timer1->irq_num, timer1_isr, NULL); bflb_irq_enable(timer0->irq_num); bflb_irq_enable(timer1->irq_num); /* Enable timer */ bflb_timer_start(timer0); bflb_timer_start(timer1); printf("case success.\r\n"); while (1) { bflb_mtimer_delay_ms(1500); } } ``` 经过flash编译执行之后，打开串口调试器，配置完成后点击开发板的复位键，进行输出     对上面四张图数据进行总结： ``` 根据端口数据测量计算： timer0的comp0和comp1 相差结果为：30.081-29.581=500微秒 观察代码cfg0.comp1-val-cfg0.comp0-val=500微秒 结果一致 通过观察其他数据的计算也可以得到与代码结果相吻合的效果，误差值很小。 ``` ### [定时器中断]([https://so.csdn.net/so/search?q=%E5%AE%9A%E6%97%B6%E5%99%A8%E4%B8%AD%E6%96%AD&spm=1001.2101.3001.7020](https://so.csdn.net/so/search?q=%E5%AE%9A%E6%97%B6%E5%99%A8%E4%B8%AD%E6%96%AD&spm=1001.2101.3001.7020))的使用 （在定时器中断里去控制gpio，通过gpio的输出{波形图}去判断定时器的延时，目前我的逻辑分析仪还没有到手，到手之后数据测量完成再进行详细说明，目前就是我的代码测试数据） ``` #include "bflb_mtimer.h" #include "bflb_timer.h" #include "board.h" #include"bflb_gpio.h" #define TEST_TIMER_COMP_ID TIMER_COMP_ID_2 struct bflb_device_s *timer0; // struct bflb_device_s *timer1; struct bflb_device_s *gpio; bool gpio_30=false; bool gpio_31=false; bool gpio_32=false;//来控制灯 void timer0_isr(int irq, void *arg)//timer0中端服务程序 { bool status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_0);//0来打印这个 if (status) { bflb_timer_compint_clear(timer0, TIMER_COMP_ID_0); // printf("timer0 comp0 trigger\r\n"); gpio_30=!gpio_30; } status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_1); if (status) {//1来打印这个 bflb_timer_compint_clear(timer0, TIMER_COMP_ID_1); // printf("timer0 comp1 trigger\r\n"); gpio_31=!gpio_31; } status = bflb_timer_get_compint_status(timer0, TIMER_COMP_ID_2); if (status) {//2来打印此 bflb_timer_compint_clear(timer0, TIMER_COMP_ID_2); // printf("timer0 comp2 trigger\r\n"); gpio_32=!gpio_32; } } // void timer1_isr(int irq, void *arg) // { // bool status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_0); // if (status) { // bflb_timer_compint_clear(timer1, TIMER_COMP_ID_0); // printf("timer1 comp0 trigger\r\n"); // } // status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_1); // if (status) { // bflb_timer_compint_clear(timer1, TIMER_COMP_ID_1); // printf("timer1 comp1 trigger\r\n"); // } // status = bflb_timer_get_compint_status(timer1, TIMER_COMP_ID_2); // if (status) { // bflb_timer_compint_clear(timer1, TIMER_COMP_ID_2); // printf("timer1 comp2 trigger\r\n"); // } // } int main(void) { board_init();//板级初始化，例如时钟初始化等 printf("Timer basic test\n"); gpio = bflb_device_get_by_name("gpio"); //初始化为3个端口 bflb_gpio_init(gpio, GPIO_PIN_30, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0); bflb_gpio_init(gpio, GPIO_PIN_31, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0); bflb_gpio_init(gpio, GPIO_PIN_32, GPIO_OUTPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0); /* timer clk = XCLK/(div + 1 )*/ struct bflb_timer_config_s cfg0; cfg0.counter_mode = TIMER_COUNTER_MODE_PROLOAD; /* preload when match occur */ cfg0.clock_source = TIMER_CLKSRC_XTAL;//外部时钟为40 cfg0.clock_div = 39; /* for bl616/bl808/bl606p is 39, for bl702 is 31 *///初始的div分频应该是div+1=40 //外部时钟40除以40分频，可获得一个1兆的时钟 cfg0.trigger_comp_id = TEST_TIMER_COMP_ID; cfg0.comp0_val = 1000000; /* match value 0 *///说明1兆分了10^6,说明comp0进入时候触发的中端为1s cfg0.comp1_val = 1500000; /* match value 1 *///1.5s cfg0.comp2_val = 2000000; /* match value 2 *///2.0s cfg0.preload_val = 0; /* preload value */ // struct bflb_timer_config_s cfg1; // cfg1.counter_mode = TIMER_COUNTER_MODE_PROLOAD; // cfg1.clock_source = TIMER_CLKSRC_XTAL; // cfg1.clock_div = 39; /* for bl616/bl808/bl606p is 39, for bl702 is 31 */ // cfg1.trigger_comp_id = TEST_TIMER_COMP_ID; // cfg1.comp0_val = 1000000; /* match value 0 */ // cfg1.comp1_val = 1500000; /* match value 1 */ // cfg1.comp2_val = 2500000; /* match value 2 */ // cfg1.preload_val = 0; /* preload value */ timer0 = bflb_device_get_by_name("timer0"); // timer1 = bflb_device_get_by_name("timer1"); /* Timer init with default configuration */ bflb_timer_init(timer0, &cfg0); // bflb_timer_init(timer1, &cfg1); bflb_irq_attach(timer0->irq_num, timer0_isr, NULL); // bflb_irq_attach(timer1->irq_num, timer1_isr, NULL); bflb_irq_enable(timer0->irq_num); // bflb_irq_enable(timer1->irq_num); /* Enable timer */ bflb_timer_start(timer0); // bflb_timer_start(timer1); printf("case success.\r\n"); while (1) { //bflb_mtimer_delay_ms(1500); gpio_30 ? bflb_gpio_set(gpio,GPIO_PIN_30) : bflb_gpio_reset(gpio,GPIO_PIN_30); gpio_31 ? bflb_gpio_set(gpio,GPIO_PIN_31) : bflb_gpio_reset(gpio,GPIO_PIN_31); gpio_32 ? bflb_gpio_set(gpio,GPIO_PIN_32) : bflb_gpio_reset(gpio,GPIO_PIN_32); //控制灯光什么时候亮什么时候灭 } } ``` 通过控制板子的灯光来进行相关数据测试，后续逻辑分析仪回来后会持续更新。。。 ### 总结 嵌入式真的比算法有趣多啦哈哈哈，po上一张学习的图，一起加油！！！ 

写的不错

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