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feat(mipi_dsi): measure FPS by toggling GPIO

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This commit is contained in:
morris 2024-04-10 15:30:43 +08:00
parent 588bbac564
commit b6a1d242d8
3 changed files with 42 additions and 0 deletions
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2
examples/peripherals/lcd/mipi_dsi/README.md
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@ -50,6 +50,8 @@ Before testing your LCD, you also need to read your LCD spec carefully, and then
Run `idf.py menuconfig` and go to `Example Configuration`:
* Choose whether to `Use DMA2D to copy draw buffer to frame buffer` asynchronously. If you choose `No`, the draw buffer will be copied to the frame buffer synchronously by CPU.
* Choose if you want to `Monitor FPS by GPIO`. If you choose `Yes`, then you can attach an oscilloscope or logic analyzer to the GPIO pin to monitor the FPS of the display.
Please note, the actual FPS should be **double** the square wave frequency.
### Build and Flash

7
examples/peripherals/lcd/mipi_dsi/main/Kconfig.projbuild
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@ -5,4 +5,11 @@ menu "Example Configuration"
help
Enable this option, DMA2D will be used to copy the LVGL draw buffer to the target frame buffer.
This can save some CPU time and improve the performance.
config EXAMPLE_MONITOR_FPS_BY_GPIO
bool "Monitor FPS by GPIO"
default y
help
Enable this option, you can visualize the FPS by attaching a logic analyzer to a specific GPIO.
The GPIO will output a square wave with the frequency of FPS/2.
endmenu

33
examples/peripherals/lcd/mipi_dsi/main/mipi_dsi_lcd_example_main.c
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@ -51,6 +51,10 @@ static const char *TAG = "example";
#define EXAMPLE_PIN_NUM_BK_LIGHT -1
#define EXAMPLE_PIN_NUM_LCD_RST -1
#if CONFIG_EXAMPLE_MONITOR_FPS_BY_GPIO
#define EXAMPLE_PIN_NUM_FPS_MONITOR 20 // Monitor the FPS by toggling the GPIO
#endif
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// Please update the following configuration according to your Application ///////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@ -123,6 +127,17 @@ static bool example_notify_lvgl_flush_ready(esp_lcd_panel_handle_t panel, esp_lc
return false;
}
#if CONFIG_EXAMPLE_MONITOR_FPS_BY_GPIO
static bool example_monitor_fps(esp_lcd_panel_handle_t panel, esp_lcd_dpi_panel_event_data_t *edata, void *user_ctx)
{
static int io_level = 0;
// please note, the real FPS should be 2*frequency of this GPIO toggling
gpio_set_level(EXAMPLE_PIN_NUM_FPS_MONITOR, io_level);
io_level = !io_level;
return false;
}
#endif
static void example_bsp_enable_dsi_phy_power(void)
{
// Turn on the power for MIPI DSI PHY, so it can go from "No Power" state to "Shutdown" state
@ -155,8 +170,23 @@ static void example_bsp_set_lcd_backlight(uint32_t level)
#endif
}
#if CONFIG_EXAMPLE_MONITOR_FPS_BY_GPIO
static void example_bsp_init_fps_monitor_io(void)
{
gpio_config_t monitor_io_conf = {
.mode = GPIO_MODE_OUTPUT,
.pin_bit_mask = 1ULL << EXAMPLE_PIN_NUM_FPS_MONITOR,
};
ESP_ERROR_CHECK(gpio_config(&monitor_io_conf));
}
#endif
void app_main(void)
{
#if CONFIG_EXAMPLE_MONITOR_FPS_BY_GPIO
example_bsp_init_fps_monitor_io();
#endif
example_bsp_enable_dsi_phy_power();
example_bsp_init_lcd_backlight();
example_bsp_set_lcd_backlight(EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL);
@ -246,6 +276,9 @@ void app_main(void)
ESP_LOGI(TAG, "Register DPI panel event callback for LVGL flush ready notification");
esp_lcd_dpi_panel_event_callbacks_t cbs = {
.on_color_trans_done = example_notify_lvgl_flush_ready,
#if CONFIG_EXAMPLE_MONITOR_FPS_BY_GPIO
.on_refresh_done = example_monitor_fps,
#endif
};
ESP_ERROR_CHECK(esp_lcd_dpi_panel_register_event_callbacks(mipi_dpi_panel, &cbs, display));