“玩板”+在STM32F7DISC上重玩micropython（2）
<div class='showpostmsg'> 本帖最后由 dcexpert 于 2020-2-17 15:48 编辑<p>写入了新固件，就可以体验LCD和触摸屏了，带触摸功能的大屏，是STM32F7DISC的一大特点，当年多少人为此着迷，这也是这次重新用它的主要原因。</p>
<p> </p>
<p>先测试LCD，首先需要载入 lcdF7D库，然后才能使用lcd功能。</p>
<p> </p>
<p><strong><span style="font-family:Courier;">import lcdF7D as lcd</span></strong></p>
<p> </p>
<p>其次需要对lcd进行初始化</p>
<p> </p>
<p><strong><span style="font-family:Courier;">lcd.init()</span></strong></p>
<p> </p>
<p>然后就可以进行画线、画圆等操作了。下面是几个主要函数用法：</p>
<p> </p>
<ul>
<li>clear(color)，用颜色color清除整个屏幕<br />
颜色的定义为
<ul>
<li>如果是空，使用set_text_color中定义的颜色</li>
<li>如果是一个数字，以0xRRGGBB方式</li>
<li>如果是两个数字，第一个代表Alpha，第二个数字同上</li>
<li>如果是3个数字，分别代表R、G、B分量，Alpha固定为255</li>
<li>如果是4个数字，分别代表A、R、G、B</li>
</ul>
</li>
<li>set_text_color(color)，设置前景颜色</li>
<li>set_back_color(color)，设置背景颜色</li>
<li>draw_line(x1, y1, x2, y2)，画直线</li>
<li>draw_Hline(x, y, len)，画水平线</li>
<li>draw_Vline(x, y, len)，画垂直线</li>
<li>draw_rect(x1, y1, x2, y2)，画空心矩形</li>
<li>fill_rect(x1, y1, x2, y2)，画实心矩形</li>
<li>draw_circle(x, y, r)，画圆</li>
<li>set_font(n)，设置字体大小，有效大小是8/12/16/20/24</li>
<li>display_char(x, y, asc)，在x,y处显示字符</li>
<li>display_string_at(x, y, string, mode)，显示字符串</li>
</ul>
<p> </p>
<p><strong>完整的测试程序</strong></p>
<p> </p>
<pre>
<code class="language-python">from time import sleep_ms, ticks_ms, ticks_diff
import pyb, machine
from random import randrange as rand
import lcdF7D as lcd
import tchF7D as ts
MAX_X = 480
MAX_Y = 272
lcd.init()
ts.init(MAX_X, MAX_Y)
def test_rand_line(n = 5000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'line test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
lcd.draw_line(rand(MAX_X), rand(MAX_Y), rand(MAX_X), rand(MAX_Y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)
def test_rand_rect(n = 2000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'rect test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
x, y = rand(MAX_X), rand(MAX_Y)
lcd.draw_rect(x, y, rand(MAX_X - x), rand(MAX_Y - y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)
def test_rand_fillrect(n = 2000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'fill rect test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
x, y = rand(MAX_X), rand(MAX_Y)
lcd.fill_rect(x, y, rand(MAX_X - x), rand(MAX_Y - y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)
def test_gradient(c1=0, c2=0xff, dir=0):
def cr(x1, x2, i, n):
return int(x1 + i*(x2-x1)/n)
r1, g1, b1 = c1>>16, (c1>>8)%256, c1%256
r2, g2, b2 = c2>>16, (c2>>8)%256, c2%256
if dir == 0:
for i in range(MAX_X):
r = cr(r1, r2, i, MAX_X)
g = cr(g1, g2, i, MAX_X)
b = cr(b1, b2, i, MAX_X)
lcd.set_text_color(r, g, b)
lcd.draw_Vline(i, 0, MAX_Y)
elif dir == 1:
for i in range(MAX_Y):
r = cr(r1, r2, i, MAX_Y)
g = cr(g1, g2, i, MAX_Y)
b = cr(b1, b2, i, MAX_Y)
lcd.set_text_color(r, g, b)
lcd.draw_Hline(0, i, MAX_X)
elif dir == 2:
for i in range(MAX_X):
r = cr(r2, r1, i, MAX_X)
g = cr(g2, g1, i, MAX_X)
b = cr(b2, b1, i, MAX_X)
lcd.set_text_color(r, g, b)
lcd.draw_Vline(i, 0, MAX_Y)
else:
for i in range(MAX_Y):
r = cr(r2, r1, i, MAX_Y)
g = cr(g2, g1, i, MAX_Y)
b = cr(b2, b1, i, MAX_Y)
lcd.set_text_color(r, g, b)
lcd.draw_Hline(0, i, MAX_X)
def test_rand_char(n = 2000, font = 12, delay = 1):
if font > 20: _w, _h = 17, 24,
elif font > 16: _w, _h = 14, 20
elif font > 12: _w, _h = 11, 16
elif font > 8: _w, _h = 7, 12
else: _w, _h = 5, 8
lcd.clear()
lcd.set_font(_h)
mx, my = MAX_X//_w, MAX_Y//_h
for i in range(n):
lcd.set_text_color(rand(0xFFFFFF))
lcd.display_char(rand(mx) * _w, rand(my) * _h, rand(95)+32)
sleep_ms(delay)
def test_rand_pchar(n = 2000, font = 12, delay = 5):
if font > 20: _w, _h = 17, 24,
elif font > 16: _w, _h = 14, 20
elif font > 12: _w, _h = 11, 16
elif font > 8: _w, _h = 7, 12
else: _w, _h = 5, 8
lcd.clear()
lcd.set_font(_h)
mx, my = MAX_X//_w, MAX_Y//_h
px, py = 0, 0
for i in range(n):
lcd.set_text_color(rand(0xFFFFFF))
lcd.display_char(px * _w, py * _h, rand(95)+32)
px += 1
if px >= mx:
px, py = 0, py + 1
if py >= my:
py = my - 1
lcd.scroll(0, -_h)
lcd.set_text_color(0)
lcd.fill_rect(0, MAX_Y - _h, MAX_X-1, MAX_Y-1)
sleep_ms(delay)
def test_rand_gradient(n = 20, delay = 500):
for i in range(n):
test_gradient(rand(0xFFFFFF), rand(0xFFFFFF), rand(4))
sleep_ms(delay)
MAX_ITER = 60
pal =
def test_mandelbrot(x0 = -2.5, y0 = -2, x1 = 1.5, y1 = 2, ITER = MAX_ITER, RandPAL = 1):
def calc(c):
z = 0
for i in range(ITER):
z = z * z + c
if abs(z) > 4:
return i
return ITER-1
if RandPAL:
global pal
pal =
lcd.clear(0)
t0 = ticks_ms()
dx = (x1 - x0)/MAX_X
dy = (y1 - y0)/MAX_Y
for ix in range(MAX_X):
for iy in range(MAX_Y):
z = x0 + dx * ix + (y0 + dy * iy) * 1j
c = calc(z)
lcd.draw_pixel(ix, iy, pal)
return ticks_diff(ticks_ms(), t0)
def test_fast_mandelbrot(x0 = -2.5, y0 = -2, x1 = 1.5, y1 = 2, ITER = MAX_ITER, RandPAL = 1):
def calc(c):
z = 0
for i in range(ITER):
z = z * z + c
if abs(z) > 4:
return i
return ITER-1
if RandPAL:
global pal
pal =
lcd.clear(0)
t0 = ticks_ms()
dx = (x1 - x0)/MAX_X
dy = (y1 - y0)/MAX_Y
c = *16
for ix in range(MAX_X//4):
for iy in range(MAX_Y//4):
c = *16
z = x0 + dx * ix * 4 + (y0 + dy * iy * 4) * 1j
c = calc(z)
c = calc(z + dx*3)
c = calc(z + dy*3j)
c = calc(z + dx*3 + dy*3j)
if c == c and c == c and c == c:
lcd.set_text_color(pal%ITER])
lcd.fill_rect(ix*4, iy*4, 4, 4)
else:
for i in range(16):
if c == 0:
c = calc(z + dx*(i%4) + dy*(i//4)*1j)
lcd.draw_pixel(ix*4+(i%4), iy*4+(i//4), pal%ITER])
return ticks_diff(ticks_ms(), t0)
def lcd_test():
test_rand_line()
test_rand_rect()
test_rand_fillrect()
test_rand_gradient()
test_rand_char(font = 8)
test_rand_char(font = 12)
test_rand_char(font = 16)
test_rand_char(font = 20)
test_rand_char(font = 24)
test_rand_pchar(font = rand(32))
lcd_test()
test_fast_mandelbrot()</code></pre>
<p> </p>
<p> </p>
<p><strong>注意事项</strong></p>
<ul>
<li>注意画图时不要超出屏幕范围，否则可能引起缓冲区溢出造成问题，甚至系统复位</li>
<li>Alpha通道不能直接叠加到以前的图像上。</li>
</ul>
<p><br />
<b><font color="#5E7384">此内容由EEWORLD论坛网友<font size="3">dcexpert</font>原创，如需转载或用于商业用途需征得作者同意并注明出处</font></b><br />
</p>
</div><script> var loginstr = '<div class="locked">查看本帖全部内容，请<a href="javascript:;" style="color:#e60000" class="loginf">登录</a>或者<a href="https://bbs.eeworld.com.cn/member.php?mod=register_eeworld.php&action=wechat" style="color:#e60000" target="_blank">注册</a></div>';
if(parseInt(discuz_uid)==0){
(function($){
var postHeight = getTextHeight(400);
$(".showpostmsg").html($(".showpostmsg").html());
$(".showpostmsg").after(loginstr);
$(".showpostmsg").css({height:postHeight,overflow:"hidden"});
})(jQuery);
} </script><script type="text/javascript">(function(d,c){var a=d.createElement("script"),m=d.getElementsByTagName("script"),eewurl="//counter.eeworld.com.cn/pv/count/";a.src=eewurl+c;m.parentNode.insertBefore(a,m)})(document,523)</script> 本帖最后由 dcexpert 于 2020-2-17 15:23 编辑
<p><strong>随机画线测试</strong>，</p>
<p> </p>
<pre>
<code class="language-python">def test_rand_line(n = 5000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'line test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
lcd.draw_line(rand(MAX_X), rand(MAX_Y), rand(MAX_X), rand(MAX_Y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)</code></pre>
<p> </p>
<p></p>
本帖最后由 dcexpert 于 2020-2-17 15:27 编辑
<p><strong>矩形显示测试</strong></p>
<p> </p>
<pre>
<code class="language-python">def test_rand_rect(n = 2000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'rect test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
x, y = rand(MAX_X), rand(MAX_Y)
lcd.draw_rect(x, y, rand(MAX_X - x), rand(MAX_Y - y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)
def test_rand_fillrect(n = 2000, delay = 1):
lcd.clear()
lcd.set_font(24)
lcd.set_text_color(255,255,128,0)
lcd.display_string_at(0, 0, 'fill rect test' ,0)
sleep_ms(1000)
t0 = ticks_ms()
for i in range(n):
lcd.set_text_color(rand(0xFF), rand(0xFFFFFF))
x, y = rand(MAX_X), rand(MAX_Y)
lcd.fill_rect(x, y, rand(MAX_X - x), rand(MAX_Y - y))
sleep_ms(delay)
return ticks_diff(ticks_ms(), t0)</code></pre>
<p> </p>
<p> <br />
</p>
<p> </p>
<p>背景渐变显示测试，计算两种颜色的渐变颜色，然后使用draw_Hline或draw_Vline画线填充屏幕</p>
<p> </p>
<pre>
<code class="language-python">def test_gradient(c1=0, c2=0xff, dir=0):
def cr(x1, x2, i, n):
return int(x1 + i*(x2-x1)/n)
r1, g1, b1 = c1>>16, (c1>>8)%256, c1%256
r2, g2, b2 = c2>>16, (c2>>8)%256, c2%256
if dir == 0:
for i in range(MAX_X):
r = cr(r1, r2, i, MAX_X)
g = cr(g1, g2, i, MAX_X)
b = cr(b1, b2, i, MAX_X)
lcd.set_text_color(r, g, b)
lcd.draw_Vline(i, 0, MAX_Y)
elif dir == 1:
for i in range(MAX_Y):
r = cr(r1, r2, i, MAX_Y)
g = cr(g1, g2, i, MAX_Y)
b = cr(b1, b2, i, MAX_Y)
lcd.set_text_color(r, g, b)
lcd.draw_Hline(0, i, MAX_X)
elif dir == 2:
for i in range(MAX_X):
r = cr(r2, r1, i, MAX_X)
g = cr(g2, g1, i, MAX_X)
b = cr(b2, b1, i, MAX_X)
lcd.set_text_color(r, g, b)
lcd.draw_Vline(i, 0, MAX_Y)
else:
for i in range(MAX_Y):
r = cr(r2, r1, i, MAX_Y)
g = cr(g2, g1, i, MAX_Y)
b = cr(b2, b1, i, MAX_Y)
lcd.set_text_color(r, g, b)
lcd.draw_Hline(0, i, MAX_X)</code></pre>
<p> </p>
<p>图片待补充</p>
本帖最后由 dcexpert 于 2020-2-17 15:48 编辑
<p>随机显示字符，可以选择不同大小字体</p>
<p> </p>
<pre>
<code class="language-python">def test_rand_char(n = 2000, font = 12, delay = 1):
if font > 20: _w, _h = 17, 24,
elif font > 16: _w, _h = 14, 20
elif font > 12: _w, _h = 11, 16
elif font > 8: _w, _h = 7, 12
else: _w, _h = 5, 8
lcd.clear()
lcd.set_font(_h)
mx, my = MAX_X//_w, MAX_Y//_h
for i in range(n):
lcd.set_text_color(rand(0xFFFFFF))
lcd.display_char(rand(mx) * _w, rand(my) * _h, rand(95)+32)
sleep_ms(delay)</code></pre>
<p> </p>
<p></p>
<p></p>
<p>显示曼德不罗特集（mandelbrot set）</p>
<p> </p>
<pre>
<code class="language-python">def test_fast_mandelbrot(x0 = -2.5, y0 = -2, x1 = 1.5, y1 = 2, ITER = MAX_ITER, RandPAL = 1):
def calc(c):
z = 0
for i in range(ITER):
z = z * z + c
if abs(z) > 4:
return i
return ITER-1
if RandPAL:
global pal
pal =
lcd.clear(0)
t0 = ticks_ms()
dx = (x1 - x0)/MAX_X
dy = (y1 - y0)/MAX_Y
c = *16
for ix in range(MAX_X//4):
for iy in range(MAX_Y//4):
c = *16
z = x0 + dx * ix * 4 + (y0 + dy * iy * 4) * 1j
c = calc(z)
c = calc(z + dx*3)
c = calc(z + dy*3j)
c = calc(z + dx*3 + dy*3j)
if c == c and c == c and c == c:
lcd.set_text_color(pal%ITER])
lcd.fill_rect(ix*4, iy*4, 4, 4)
else:
for i in range(16):
if c == 0:
c = calc(z + dx*(i%4) + dy*(i//4)*1j)
lcd.draw_pixel(ix*4+(i%4), iy*4+(i//4), pal%ITER])
return ticks_diff(ticks_ms(), t0)</code></pre>
<p> </p>
<p></p>
<p> </p>
<p></p>
页:
[1]