潘多拉板子LCD屏画波形问题

MH居士 · 发表于 2021-1-6 20:35:02

在潘多拉板子自带的LCD屏上画波形曲线，在RT-Thread下，画一个点前，如何将之前的点删掉，没有找到删点的函数。我现在没有办法，所以导致图片中的问题。看lcd的应用函数就是这些：
void lcd_clear(rt_uint16_t color);
void lcd_address_set(rt_uint16_t x1, rt_uint16_t y1, rt_uint16_t x2, rt_uint16_t y2);
void lcd_set_color(rt_uint16_t back, rt_uint16_t fore);

void lcd_draw_point(rt_uint16_t x, rt_uint16_t y);
void lcd_draw_point_color(rt_uint16_t x, rt_uint16_t y, rt_uint16_t color);
void lcd_draw_circle(rt_uint16_t x0, rt_uint16_t y0, rt_uint8_t r);
void lcd_draw_line(rt_uint16_t x1, rt_uint16_t y1, rt_uint16_t x2, rt_uint16_t y2);
void lcd_draw_rectangle(rt_uint16_t x1, rt_uint16_t y1, rt_uint16_t x2, rt_uint16_t y2);
void lcd_fill(rt_uint16_t x_start, rt_uint16_t y_start, rt_uint16_t x_end, rt_uint16_t y_end, rt_uint16_t color);

void lcd_show_num(rt_uint16_t x, rt_uint16_t y, rt_uint32_t num, rt_uint8_t len, rt_uint32_t size);
rt_err_t lcd_show_string(rt_uint16_t x, rt_uint16_t y, rt_uint32_t size, const char *fmt, ...);
rt_err_t lcd_show_image(rt_uint16_t x, rt_uint16_t y, rt_uint16_t length, rt_uint16_t wide, const rt_uint8_t *p);
#ifdef PKG_USING_QRCODE
rt_err_t lcd_show_qrcode(rt_uint16_t x, rt_uint16_t y, rt_uint8_t version, rt_uint8_t ecc, const char *data, rt_uint8_t enlargement);
#endif

void lcd_enter_sleep(void);
void lcd_exit_sleep(void);
void lcd_display_on(void);
void lcd_display_off(void);