如何在HLS中描述数字时钟？
绪论
该项目的目标是展示 hls 在设计数字系统方面的能力。为此，本文展示如何在 hls 中描述数字时钟。
时钟在 7 段数码管上显示小时、分钟和秒。
它有两种操作模式：时钟和设置。时钟模式是标准模式，在此模式下，当前时间显示在数码管上。在设置模式下，可以使用按钮设置时间。
下图显示开发板上的时钟配置。
如下图所示，该设计主要分为三个模块：秒时钟发生器、数字时钟引擎和显示驱动。
下面的流水线循环用于实现秒时钟发生器。
bool delay(long long int n) {#pragma hls inline offstatic bool dummy = 0;for (long long int j = 0; j < n; j++) {#pragma hls pipelinedummy = !dummy;}return dummy;}void one_second_clock_generator(bool &second) {#pragma hls interface ap_none port=second#pragma hls interface ap_ctrl_none port=returnstatic bool s = 0;s=!s;second = s;delay(50000000l);}
数字时钟引擎主要是跟踪小时、分钟和秒，并在收到来自秒时钟发生器模块的时钟节拍时更新它们。以下代码完成上诉功能。
void debounce(bool pulse, bool &out) {#pragma hls inline offstatic bool out0 = 0;static bool out1 = 0;static bool out2 = 0;static bool state = 0;if (state == 0) {out2 = out1;out1 = out0;out0 = pulse;state = 1;} else {delay(2500000);state = 0;}out = out0 & out1 & out2;}void set_time(ap_uint &seconds,ap_uint &minutes,ap_uint &hours,bool set_second,bool set_minute,bool set_hour){//--------------------------------------------------static bool second_state = 0;if (second_state == 0 && set_second == 1 ) {seconds++;if (seconds == 60) {seconds = 0;}second_state = 1;}if (second_state == 1 && set_second == 0 ) {second_state = 0;}//---------------------------------------------------static bool minute_state = 0;if (minute_state == 0 && set_minute == 1 ) {minutes++;if (minutes == 60) {minutes = 0;}minute_state = 1;}if (minute_state == 1 && set_minute == 0 ) {minute_state = 0;}//----------------------------------------------------static bool hour_state = 0;if (hour_state == 0 && set_hour == 1) {hours++;if (hours == 24) {hours = 0;}hour_state = 1;}if (hour_state == 1 && set_hour == 0) {hour_state = 0;}//----------------------------------------------------}void clock_ticking(ap_uint &hours,ap_uint &minutes,ap_uint &seconds){seconds++;if (seconds == 60) {seconds = 0;minutes++;if (minutes == 60) {minutes = 0;hours++;if (hours == 24)hours = 0;}}}void digital_clock(bool set_time_sw,bool &set_time_led,bool set_second,bool set_minute,bool set_hour,bool one_second_delay,ap_uint &seconds_out,ap_uint &minutes_out,ap_uint &hours_out){#pragma hls interface ap_none port=set_time_sw#pragma hls interface ap_none port=set_time_led#pragma hls interface ap_none port=set_minute#pragma hls interface ap_none port=set_hour#pragma hls interface ap_none port=seconds_out#pragma hls interface ap_none port=minutes_out#pragma hls interface ap_none port=hours_out#pragma hls interface ap_ctrl_none port=returnstatic ap_uint seconds = 0;static ap_uint minutes = 0;static ap_uint hours = 0;ap_uint segment_data;ap_uint segment_enable;static bool state_clock = 0;bool one_second = one_second_delay;bool set_time_flag = set_time_sw;if (one_second==1&&set_time_flag==0&&state_clock==0) {clock_ticking(hours, minutes, seconds);state_clock = 1;}if (one_second==0&&set_time_flag==0&&state_clock==1) {state_clock = 0;}if (set_time_flag == 1) {bool set_minute_debounce;bool set_hour_debounce;bool set_second_debounce;debounce (set_minute, set_minute_debounce);debounce (set_hour, set_hour_debounce);debounce (set_second, set_second_debounce);set_time(seconds, minutes, hours, set_second_debounce, set_minute_debounce, set_hour_debounce);}seconds_out = seconds;minutes_out = minutes;hours_out = hours;set_time_led = set_time_sw;}
最后一个 hls 代码在 7 段数码管上显示当前时间。
#include const ap_uint seven_segment_code[10] = {0b11000000,0b11111001,0b10100100,0b10110000,0b10011001,0b10010010,0b10000010,0b11111000,0b10000000,0b10010000};bool delay(long long int n) {#pragma hls inline offstatic bool dummy = 0;for (long long int j = 0; j < n; j++) {#pragma hls pipelinedummy = !dummy;}return dummy;}void seven_segment_display(ap_uint hours,ap_uint minutes,ap_uint seconds,ap_uint &seven_segment_data,ap_uint &seven_segment_enable){#pragma hls interface ap_none port=hours#pragma hls interface ap_none port=minutes#pragma hls interface ap_none port=seconds#pragma hls interface ap_none port=seven_segment_data#pragma hls interface ap_none port=seven_segment_enable#pragma hls interface ap_ctrl_none port=returnap_uint second_digit_1 = seconds%10;ap_uint second_digit_2 = seconds/10;ap_uint minute_digit_1 = minutes%10;ap_uint minute_digit_2 = minutes/10;ap_uint hours_digit_1 = hours%10;ap_uint hours_digit_2 = hours/10;ap_uint segment_data;ap_uint segment_enable;static ap_uint state = 0;switch (state) {// secondcase 0:segment_data = seven_segment_code[second_digit_1];segment_enable = 0b11111110;delay(250000l);state = 1;break;case 1:segment_data = seven_segment_code[second_digit_2];segment_enable = 0b11111101;state = 2;delay(250000l);break;// minutescase 2:segment_data = seven_segment_code[minute_digit_1];segment_enable = 0b11110111;state = 3;delay(250000l);break;case 3:segment_data = seven_segment_code[minute_digit_2];segment_enable = 0b11101111;state = 4;delay(250000l);break;// hourscase 4:segment_data = seven_segment_code[hours_digit_1];segment_enable = 0b10111111;state = 5;delay(250000l);break;case 5:segment_data = seven_segment_code[hours_digit_2];segment_enable = 0b01111111;state = 0;delay(250000l);break;default:segment_data = seven_segment_code[0];segment_enable = 0b11111111;state = 0;delay(250000l);break;}seven_segment_data = segment_data;seven_segment_enable = segment_enable;}
综合这些代码后，使用 vivado 工具将它们连接在一起并生成 fpga 比特流。
对电路板编程后，可以看到下图：
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该项目的目标是展示 hls 在设计数字系统方面的能力。为此，本文展示如何在 hls 中描述数字时钟。
时钟在 7 段数码管上显示小时、分钟和秒。
它有两种操作模式：时钟和设置。时钟模式是标准模式，在此模式下，当前时间显示在数码管上。在设置模式下，可以使用按钮设置时间。
下图显示开发板上的时钟配置。
如下图所示，该设计主要分为三个模块：秒时钟发生器、数字时钟引擎和显示驱动。
下面的流水线循环用于实现秒时钟发生器。
bool delay(long long int n) {#pragma hls inline offstatic bool dummy = 0;for (long long int j = 0; j < n; j++) {#pragma hls pipelinedummy = !dummy;}return dummy;}void one_second_clock_generator(bool &second) {#pragma hls interface ap_none port=second#pragma hls interface ap_ctrl_none port=returnstatic bool s = 0;s=!s;second = s;delay(50000000l);}
数字时钟引擎主要是跟踪小时、分钟和秒，并在收到来自秒时钟发生器模块的时钟节拍时更新它们。以下代码完成上诉功能。
void debounce(bool pulse, bool &out) {#pragma hls inline offstatic bool out0 = 0;static bool out1 = 0;static bool out2 = 0;static bool state = 0;if (state == 0) {out2 = out1;out1 = out0;out0 = pulse;state = 1;} else {delay(2500000);state = 0;}out = out0 & out1 & out2;}void set_time(ap_uint &seconds,ap_uint &minutes,ap_uint &hours,bool set_second,bool set_minute,bool set_hour){//--------------------------------------------------static bool second_state = 0;if (second_state == 0 && set_second == 1 ) {seconds++;if (seconds == 60) {seconds = 0;}second_state = 1;}if (second_state == 1 && set_second == 0 ) {second_state = 0;}//---------------------------------------------------static bool minute_state = 0;if (minute_state == 0 && set_minute == 1 ) {minutes++;if (minutes == 60) {minutes = 0;}minute_state = 1;}if (minute_state == 1 && set_minute == 0 ) {minute_state = 0;}//----------------------------------------------------static bool hour_state = 0;if (hour_state == 0 && set_hour == 1) {hours++;if (hours == 24) {hours = 0;}hour_state = 1;}if (hour_state == 1 && set_hour == 0) {hour_state = 0;}//----------------------------------------------------}void clock_ticking(ap_uint &hours,ap_uint &minutes,ap_uint &seconds){seconds++;if (seconds == 60) {seconds = 0;minutes++;if (minutes == 60) {minutes = 0;hours++;if (hours == 24)hours = 0;}}}void digital_clock(bool set_time_sw,bool &set_time_led,bool set_second,bool set_minute,bool set_hour,bool one_second_delay,ap_uint &seconds_out,ap_uint &minutes_out,ap_uint &hours_out){#pragma hls interface ap_none port=set_time_sw#pragma hls interface ap_none port=set_time_led#pragma hls interface ap_none port=set_minute#pragma hls interface ap_none port=set_hour#pragma hls interface ap_none port=seconds_out#pragma hls interface ap_none port=minutes_out#pragma hls interface ap_none port=hours_out#pragma hls interface ap_ctrl_none port=returnstatic ap_uint seconds = 0;static ap_uint minutes = 0;static ap_uint hours = 0;ap_uint segment_data;ap_uint segment_enable;static bool state_clock = 0;bool one_second = one_second_delay;bool set_time_flag = set_time_sw;if (one_second==1&&set_time_flag==0&&state_clock==0) {clock_ticking(hours, minutes, seconds);state_clock = 1;}if (one_second==0&&set_time_flag==0&&state_clock==1) {state_clock = 0;}if (set_time_flag == 1) {bool set_minute_debounce;bool set_hour_debounce;bool set_second_debounce;debounce (set_minute, set_minute_debounce);debounce (set_hour, set_hour_debounce);debounce (set_second, set_second_debounce);set_time(seconds, minutes, hours, set_second_debounce, set_minute_debounce, set_hour_debounce);}seconds_out = seconds;minutes_out = minutes;hours_out = hours;set_time_led = set_time_sw;}
最后一个 hls 代码在 7 段数码管上显示当前时间。
#include const ap_uint seven_segment_code[10] = {0b11000000,0b11111001,0b10100100,0b10110000,0b10011001,0b10010010,0b10000010,0b11111000,0b10000000,0b10010000};bool delay(long long int n) {#pragma hls inline offstatic bool dummy = 0;for (long long int j = 0; j < n; j++) {#pragma hls pipelinedummy = !dummy;}return dummy;}void seven_segment_display(ap_uint hours,ap_uint minutes,ap_uint seconds,ap_uint &seven_segment_data,ap_uint &seven_segment_enable){#pragma hls interface ap_none port=hours#pragma hls interface ap_none port=minutes#pragma hls interface ap_none port=seconds#pragma hls interface ap_none port=seven_segment_data#pragma hls interface ap_none port=seven_segment_enable#pragma hls interface ap_ctrl_none port=returnap_uint second_digit_1 = seconds%10;ap_uint second_digit_2 = seconds/10;ap_uint minute_digit_1 = minutes%10;ap_uint minute_digit_2 = minutes/10;ap_uint hours_digit_1 = hours%10;ap_uint hours_digit_2 = hours/10;ap_uint segment_data;ap_uint segment_enable;static ap_uint state = 0;switch (state) {// secondcase 0:segment_data = seven_segment_code[second_digit_1];segment_enable = 0b11111110;delay(250000l);state = 1;break;case 1:segment_data = seven_segment_code[second_digit_2];segment_enable = 0b11111101;state = 2;delay(250000l);break;// minutescase 2:segment_data = seven_segment_code[minute_digit_1];segment_enable = 0b11110111;state = 3;delay(250000l);break;case 3:segment_data = seven_segment_code[minute_digit_2];segment_enable = 0b11101111;state = 4;delay(250000l);break;// hourscase 4:segment_data = seven_segment_code[hours_digit_1];segment_enable = 0b10111111;state = 5;delay(250000l);break;case 5:segment_data = seven_segment_code[hours_digit_2];segment_enable = 0b01111111;state = 0;delay(250000l);break;default:segment_data = seven_segment_code[0];segment_enable = 0b11111111;state = 0;delay(250000l);break;}seven_segment_data = segment_data;seven_segment_enable = segment_enable;}
综合这些代码后，使用 vivado 工具将它们连接在一起并生成 fpga 比特流。
对电路板编程后，可以看到下图：
如如何让四旋翼飞行器在一个执行器损坏后继续飞行呢
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USB设备驱动程序开发
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如何在HLS中描述数字时钟？
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天合即将发布新一代液冷储能系统Elementa 2和工商储解决方案Potentia
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可穿戴式设备实用性不足，谁会为它买单？
将手机植入大脑 这才是移动技术的未来？
vivoX7曜石黑版高清图赏
物联网中的工业无线标准
ESD保护的智能小型化
led拼接屏与lcd拼接屏的区别
五种整流电路对比分析