From 93eda44559bcc570c01f3e279aa6975a54c23b71 Mon Sep 17 00:00:00 2001 From: Dejvino Date: Sun, 2 Aug 2020 13:51:47 +0000 Subject: [PATCH] Split into multiple layers --- README.md | 7 +++ main.c | 122 +++++++++++++++++++++++++++++++------------------- meson.build | 2 +- spilcd.h | 80 +++++++++++++++++++++++++++++++++ spilcd_font.c | 37 +++++++++++++++ spilcd_font.h | 5 +++ spilcd_gfx.c | 41 +++++++++++++++++ spilcd_gfx.h | 50 +++++++++++++++++++++ st7735.c | 122 ++++++++++---------------------------------------- st7735.h | 100 +---------------------------------------- 10 files changed, 324 insertions(+), 242 deletions(-) create mode 100644 README.md create mode 100644 spilcd.h create mode 100644 spilcd_font.c create mode 100644 spilcd_font.h create mode 100644 spilcd_gfx.c create mode 100644 spilcd_gfx.h diff --git a/README.md b/README.md new file mode 100644 index 0000000..5ea863f --- /dev/null +++ b/README.md @@ -0,0 +1,7 @@ +# ST7735 SPI Display Toolkit + +Built and tested with OrangePi Zero and ST7735 128x160 v1.1 SPI display. + +## Resources +* [https://github.com/orangepi-xunlong/WiringOP](orangepi-xunlong/WiringOP) - GPIO controlling library compatible with Raspberry Pi's WiringPi +* [https://github.com/dhepper/font8x8](dhepper/font8x8) - 8x8 pixels monospaced font diff --git a/main.c b/main.c index 654e188..aabc84d 100644 --- a/main.c +++ b/main.c @@ -1,74 +1,106 @@ #include -#include "st7735.h" +#include +#include +#include #include +#include "spilcd.h" +#include "spilcd_gfx.h" +#include "spilcd_font.h" + +uint8 random_color_r(int seed); +uint8 random_color_g(int seed); +uint8 random_color_b(int seed); +inline uint8 random_color_r(int seed) { return seed % (256 / 7) * 7; } +inline uint8 random_color_g(int seed) { return seed % (256 / 13) * 13; } +inline uint8 random_color_b(int seed) { return seed % (256 / 23) * 23; } int main(int argc, char *argv[]) { setbuf(stdout, NULL); + srand(time(NULL)); wiringPiSetup(); - lcd_t* lcd = lcd_init(40000000, 10, 2, 0); + lcd_t* lcd = lcd_init(40000000, 1, 10, 7, 8); printf("Fill display..."); printf("blue..."); - lcd_fillScreen(0, 70, 160); - delay(1000); + lcd_fillScreen(lcd, 0, 70, 160); + printf("...waiting 1 second..."); + sleep(1); printf("black..."); - lcd_fillScreen(0, 0, 0); + lcd_fillScreen(lcd, 0, 0, 0); printf("DONE\n"); - delay(1000); - /* Draw the lines */ - /*printf("Lines..."); - lcdst_drawHLine(0, 149, 128, 0, 255, 255); - lcdst_drawHLine(0, 139, 128, 255, 255, 0); - lcdst_drawVLine(117, 0, 160, 0, 255, 255); - lcdst_drawVLine(107, 0, 160, 255, 255, 0); - printf("DONE\n");*/ + printf("...waiting 1 second...\n"); + sleep(1); - /*printf("Points..."); - for (int i = 1; i < 20; i++) { - lcdst_drawPx(5 - 1, 70 + i, 100, 100, 100); - lcdst_drawPx(5 + i + 1, 70 + i, 100, 100, 100); + printf("Points..."); + for (int i = 1; i < 2000; i++) { + int r = rand(); + lcd_drawPixel(lcd, r % 128, i % 160, + random_color_r(i), + random_color_g(i), + random_color_b(i)); } printf("DONE\n"); - - printf("Triangle..."); - for (int i = 1; i < 20; i++) { - lcdst_drawHLine(5, 70 + i, i, 255, 0, 0); + + printf("...waiting 1 second...\n"); + sleep(1); + + printf("Regions..."); + int w = 15; + int h = 20; + for (int i = 1; i < 200; i++) { + int x = rand() % (128 - w); + int y = rand() % (160 - h); + lcd_setWindow(lcd, x, y, x + w - 1, y + h - 1); + uint8 r = rand(); + uint8 g = rand(); + uint8 b = rand(); + for (int p = 0; p < w*h; p++) { + lcd_pushPixel(lcd, r * p / (w*h), g * (w*h-p) / (w*h), b); + } } - printf("DONE\n");*/ - + printf("DONE\n"); + + printf("...waiting 1 second...\n"); + sleep(1); + printf("Rectangles..."); - //printf("outline..."); - //lcd_drawRect(10, 10, 10, 10, 0, 255, 255); - //lcd_drawRect(10, 30, 10, 10, 255, 255, 0); - printf("filled..."); - lcd_fillRect(30, 10, 10, 10, 0, 255, 255); - lcd_fillRect(30, 30, 10, 10, 255, 255, 0); - printf("bunch..."); - for (int i = 0; i < 40; i++) { - lcd_fillRect(40 + (i%13) * 4, 40 + (i%19) * 4, 20, 20, i % 5 * 15, i % 7 * 17, i % 3 * 23); - } + lcd_fillScreen(lcd, 0, 0, 0); + lcd_fillRect(lcd, 30, 10, 10, 10, 0, 255, 255); + lcd_fillRect(lcd, 30, 30, 10, 10, 255, 255, 0); printf("DONE\n"); + printf("...waiting 1 second...\n"); + sleep(1); + printf("Text..."); - lcd_printChar(10, 90, 'A'); - lcd_printText(10, 50, "Ahoj!"); - lcd_printChar(10, 100, 'Z'); + lcd_fillScreen(lcd, 0, 0, 0); + lcd_printChar(lcd, 10, 90, 'A'); + lcd_printText(lcd, 10, 50, "Hello, world!"); + lcd_printChar(lcd, 10, 100, 'Z'); printf("DONE\n"); - /* Send the raw data */ -/* printf("Raw..."); - lcdst_setWindow(20, 20, 29, 29); - for(uint8 i=0; i<100; i++) lcdst_pushPx(255, 0, 255); - lcdst_setWindow(0, 0, 127, 159); - printf("DONE\n");*/ - + printf("...waiting 2 seconds...\n"); + sleep(2); - /* Uninitialize the display */ - //lcd_deinit(lcd); + printf("Pulsing color..."); + for (int i = 0; i < 256; i++) { + lcd_fillScreen(lcd, + random_color_r(i), + random_color_g(i), + random_color_b(i)); + } + printf("DONE\n"); + + printf("...waiting 2 seconds before shutdown...\n"); + sleep(2); + printf("Terminating...\n"); + lcd_fillScreen(lcd, 0, 0, 0); + lcd_deinit(lcd); + printf("DONE\n"); return 0; } diff --git a/meson.build b/meson.build index 75fd70a..3ee7d16 100644 --- a/meson.build +++ b/meson.build @@ -1,3 +1,3 @@ project('dejvino-ST7735', 'c') -src = ['main.c', 'st7735.c'] +src = ['main.c', 'spilcd_gfx.c', 'spilcd_font.c', 'st7735.c'] executable('st7735', src, link_args: '-lwiringPi') diff --git a/spilcd.h b/spilcd.h new file mode 100644 index 0000000..6207d0c --- /dev/null +++ b/spilcd.h @@ -0,0 +1,80 @@ +#ifndef uint8 +#define uint8 unsigned char +#endif + +#ifndef __SPILCD_H__ +#define __SPILCD_H__ +typedef struct +{ + int channel; + int cs, a0, rs; + uint8 width, height; +} lcd_t; + +/* + * Initialize the display. + * + * Parameters: + * spiSpeed - Speed of the SPI interface. + * channel - SPI channel + * cs - Chip selection pin. + * a0 - Data/Command pin. + * rs - Optional reset pin. Use -1 when not connected. + * + * Return: Pointer to the structure with display data. + * + */ +lcd_t *lcd_init(int spiSpeed, int channel, int cs, int a0, int rs); + +/* + * Reset the specified display and clear the previously assigned memory. + * + * Parameters: + * lcd - display to use + * + * Return: void + */ +void lcd_deinit(lcd_t *lcd); + +/* + * Set the drawing area. + * + * Parameters: + * lcd - display to use + * x1 - The X parameter of the starting point. + * y1 - The Y parameter of the starting point. + * x2 - The X parameter of the ending point. + * y2 - The Y parameter of the ending point. + * + * Return: 0 for success, 1 for error. + * + */ +uint8 lcd_setWindow(lcd_t* lcd, uint8 x1, uint8 y1, uint8 x2, uint8 y2); + +/* + * Push a pixel into the previously set drawing area. + * + * Parameters: + * lcd - display to use + * r - red color (0 to 255) + * g - green color (0 to 255) + * b - blue color (0 to 255) + */ +void lcd_pushPixel(lcd_t* lcd, uint8 r, uint8 g, uint8 b); + +/* + * Push an array of pixels into the previously set drawing area. + * Significantly faster than pushing pixels individually. + * + * Parameters: + * lcd - display to use + * pixels - array of pixels where: + * pixels[i * 3 + 0] = i-th red color (0 to 255) + * pixels[i * 3 + 1] = i-th green color (0 to 255) + * pixels[i * 3 + 2] = i-th blue color (0 to 255) + * count - number of pixels in the array + */ +void lcd_pushPixels(lcd_t* lcd, uint8* pixels, size_t count); + +#endif // __SPILCD_H__ + diff --git a/spilcd_font.c b/spilcd_font.c new file mode 100644 index 0000000..5f1acb8 --- /dev/null +++ b/spilcd_font.c @@ -0,0 +1,37 @@ +#include +#include +#include +#include +#include "spilcd_font.h" +#include "font8x8_basic.h" + +static void lcd_pushChar(lcd_t* lcd, char c) +{ + char* bitmap = font8x8_basic[(unsigned int) c]; + int x,y; + int set; + for (x=0; x < 8; x++) { + for (y=0; y < 8; y++) { + set = bitmap[x] & 1 << y; + if (set) { + lcd_pushPixel(lcd, 200, 0, 0); + } else { + lcd_pushPixel(lcd, 0, 0, 0); + } + } + } +} + +void lcd_printChar(lcd_t* lcd, uint8 x, uint8 y, char c) +{ + lcd_setWindow(lcd, x, y, x+8 - 1, y+8 - 1); + lcd_pushChar(lcd, c); +} + +void lcd_printText(lcd_t* lcd, uint8 x, uint8 y, char* text) +{ + for (int i = 0; i < strlen(text); i++) { + lcd_printChar(lcd, x + i * 8, y, text[i]); + } +} + diff --git a/spilcd_font.h b/spilcd_font.h new file mode 100644 index 0000000..8f4845b --- /dev/null +++ b/spilcd_font.h @@ -0,0 +1,5 @@ +#include "spilcd.h" + +void lcd_printChar(lcd_t* lcd, uint8 x, uint8 y, char c); +void lcd_printText(lcd_t* lcd, uint8 x, uint8 y, char* text); + diff --git a/spilcd_gfx.c b/spilcd_gfx.c new file mode 100644 index 0000000..d568284 --- /dev/null +++ b/spilcd_gfx.c @@ -0,0 +1,41 @@ +#include +#include +#include +#include "spilcd_gfx.h" + +void lcd_drawPixel(lcd_t* lcd, uint8 x, uint8 y, uint8 r, uint8 g, uint8 b) +{ + if(lcd_setWindow(lcd, x, y, x, y)) return; + lcd_pushPixel(lcd, r, g, b); +} + +void lcd_fillRect(lcd_t* lcd, uint8 x, uint8 y, uint8 w, uint8 h, + uint8 r, uint8 g, uint8 b) +{ + if((w == 0) || (h == 0)) return; + if((x+w-1) >= lcd->width) w = lcd->width - x; + if((y+h-1) >= lcd->height) h = lcd->height - y; + + if(lcd_setWindow(lcd, x, y, x+w-1, y+h-1)) return; + +#define BUFFER_PIXELS 64 + int wh = w*h; + uint8 buffer[BUFFER_PIXELS * sizeof(uint8) * 3]; + for (int p = 0; p < wh; p += BUFFER_PIXELS) { + for(int pb = 0; pb < BUFFER_PIXELS; pb++) { + buffer[pb * 3 + 0] = r; + buffer[pb * 3 + 1] = g; + buffer[pb * 3 + 2] = b; + } + int rem = wh - p; + lcd_pushPixels(lcd, buffer, ((rem < BUFFER_PIXELS) ? rem : BUFFER_PIXELS)); + } +} + +void lcd_fillScreen(lcd_t* lcd, uint8 r, uint8 g, uint8 b) +{ + lcd_fillRect(lcd, 0, 0, + lcd->width, lcd->height, + r, g, b); +} + diff --git a/spilcd_gfx.h b/spilcd_gfx.h new file mode 100644 index 0000000..6755d19 --- /dev/null +++ b/spilcd_gfx.h @@ -0,0 +1,50 @@ +#include "spilcd.h" + +/* + * Draw one pixel on the currently active display. + * The color intensity scale for a normal pixel is from 0 to 255. + * The color intensity scale for the reduced pixel is from 0 to 15. + * + * Parameters: + * x - The X parameter of the pixel. + * y - The Y parameter of the pixel. + * r - The intensity of the red color. + * g - The intensity of the green color. + * b - The intensity of the blue color. + * + * Return: void + */ +void lcd_drawPixel(lcd_t* lcd, uint8 x, uint8 y, uint8 r, uint8 g, uint8 b); + +/* + * Draw a filled rectangle on the currently active display. + * The color intensity scale for a normal pixel is from 0 to 255. + * The color intensity scale for the reduced pixel is from 0 to 15. + * + * Parameters: + * x - Parameter X of the upper left corner of the rectangle. + * y - Parameter Y of the upper left corner of the rectangle. + * w - The width of the rectangle. + * h - The height of the rectangle. + * r - The intensity of the red color. + * g - The intensity of the green color. + * b - The intensity of the blue color. + * + * Return: void + */ +void lcd_fillRect(lcd_t* lcd, uint8 x, uint8 y, uint8 w, uint8 h, uint8 r, uint8 g, uint8 b); + +/* + * Fill the entire screen with one color of the currently active display. + * The color intensity scale for a normal pixel is from 0 to 255. + * The color intensity scale for the reduced pixel is from 0 to 15. + * + * Parameters: + * r - The intensity of the red color. + * g - The intensity of the green color. + * b - The intensity of the blue color. + * + * Return: void + */ +void lcd_fillScreen(lcd_t* lcd, uint8 r, uint8 g, uint8 b); + diff --git a/st7735.c b/st7735.c index ca53f6b..c476554 100644 --- a/st7735.c +++ b/st7735.c @@ -1,8 +1,8 @@ #include #include #include +#include #include "st7735.h" -#include "font8x8_basic.h" /********************************** EASY PORT *********************************/ /* @@ -28,9 +28,6 @@ struct }; /****************************** END EASY PORT END *****************************/ -/* The global variable that stores the pointer to the structure, - * with the current active display. - */ static lcd_t *activeDisplay; /* @@ -57,11 +54,10 @@ static inline void *safeMalloc(size_t size) } /* safeMalloc */ -void lcd_setOrientation(uint8 orientation); -void lcd_setGamma(uint8 state); -void lcd_pushPx(uint8 r, uint8 g, uint8 b); -void lcd_pushPixels(uint8* pixels, size_t count); -void lcd_pushChar(char c); +void lcd_setOrientation(lcd_t* lcd, uint8 orientation); +void lcd_setGamma(lcd_t* lcd, uint8 state); +void lcd_pushPixel(lcd_t* lcd, uint8 r, uint8 g, uint8 b); +void lcd_pushPixels(lcd_t* lcd, uint8* pixels, size_t count); /* * Write the command to the display driver. @@ -72,7 +68,7 @@ void lcd_pushChar(char c); static inline void writeCommand(uint8 cmd) { gpio.digitalWrite(activeDisplay->a0, LOW); - gpio.spiDataRW(activeDisplay->cs, &cmd, 1); + gpio.spiDataRW(activeDisplay->channel, &cmd, 1); } /* writeCommand */ /* @@ -84,17 +80,17 @@ static inline void writeCommand(uint8 cmd) static inline void writeData(uint8 data) { gpio.digitalWrite(activeDisplay->a0, HIGH); - gpio.spiDataRW(activeDisplay->cs, &data, 1); + gpio.spiDataRW(activeDisplay->channel, &data, 1); } /* writeData */ -lcd_t *lcd_init(int spiSpeed, int cs, int a0, int rs) +lcd_t *lcd_init(int spiSpeed, int channel, int cs, int a0, int rs) { /* Create the one instance of the lcdst_t structure and activate it */ lcd_t *instance = (lcd_t *) safeMalloc(sizeof(lcd_t)); activeDisplay = instance; - /* Assign specific pins */ + instance->channel = channel; instance->cs = cs; instance->a0 = a0; instance->rs = rs; @@ -116,7 +112,7 @@ lcd_t *lcd_init(int spiSpeed, int cs, int a0, int rs) } /* Configure the SPI interface */ - if(gpio.spiSetup(instance->cs, spiSpeed) == -1) + if(gpio.spiSetup(instance->channel, spiSpeed) == -1) { fprintf(stderr, "Failed to setup the SPI interface!\n"); exit(EXIT_FAILURE); @@ -131,8 +127,8 @@ lcd_t *lcd_init(int spiSpeed, int cs, int a0, int rs) gpio.delay(150); /* Set the orientation and the gamma */ - lcd_setOrientation(0); - lcd_setGamma(2); /* Optional */ + lcd_setOrientation(instance, 0); + lcd_setGamma(instance, 2); /* Optional */ /* Set the pixel format */ writeCommand(0x3A); @@ -152,7 +148,7 @@ void lcd_deinit(lcd_t *display) free(display); } /* lcdst_uninit */ -void lcd_setOrientation(uint8 orientation) +void lcd_setOrientation(lcd_t* lcd, uint8 orientation) { writeCommand(0x36); /* Memory Data Access Control */ @@ -162,33 +158,33 @@ void lcd_setOrientation(uint8 orientation) writeData(0x60); /* MX + MV */ activeDisplay->width = 160; activeDisplay->height = 128; - lcd_setWindow(0, 0, 159, 127); + lcd_setWindow(lcd, 0, 0, 159, 127); break; case 2: writeData(0xC0); /* MY + MX */ activeDisplay->width = 128; activeDisplay->height = 160; - lcd_setWindow(0, 0, 127, 159); + lcd_setWindow(lcd, 0, 0, 127, 159); break; case 3: writeData(0xA0); /* MY + MV */ activeDisplay->width = 160; activeDisplay->height = 128; - lcd_setWindow(0, 0, 159, 127); + lcd_setWindow(lcd, 0, 0, 159, 127); break; default: writeData(0x00); /* None */ activeDisplay->width = 128; activeDisplay->height = 160; - lcd_setWindow(0, 0, 127, 159); + lcd_setWindow(lcd, 0, 0, 127, 159); break; } } /* lcdst_setOrientation */ -void lcd_setGamma(uint8 state) +void lcd_setGamma(lcd_t* lcd, uint8 state) { /* The status (0 or 1) of the GS pin can only be empirically tested */ switch(state) @@ -204,13 +200,13 @@ void lcd_setGamma(uint8 state) writeData(state); } /* lcdst_setGamma */ -void lcd_setInversion(uint8 state) +void lcd_setInversion(lcd_t* lcd, uint8 state) { /* Display inversion ON/OFF */ writeCommand(state ? 0x21 : 0x20); } /* lcdst_setInversion */ -uint8 lcd_setWindow(uint8 x1, uint8 y1, uint8 x2, uint8 y2) +uint8 lcd_setWindow(lcd_t* lcd, uint8 x1, uint8 y1, uint8 x2, uint8 y2) { /* Accept: 0 <= x1 <= x2 < activeDisplay->width */ if(x2 < x1) return 1; @@ -245,88 +241,18 @@ void lcd_activateRamWrite(void) uint8 pixel[3]; -inline void lcd_pushPx(uint8 r, uint8 g, uint8 b) +inline void lcd_pushPixel(lcd_t* lcd, uint8 r, uint8 g, uint8 b) { gpio.digitalWrite(activeDisplay->a0, HIGH); pixel[0] = r; pixel[1] = g; pixel[2] = b; - gpio.spiDataRW(activeDisplay->cs, pixel, 3); + gpio.spiDataRW(activeDisplay->channel, pixel, 3); } /* lcdst_pushPx */ -void lcd_pushPixels(uint8* pixels, size_t count) +void lcd_pushPixels(lcd_t* lcd, uint8* pixels, size_t count) { gpio.digitalWrite(activeDisplay->a0, HIGH); - gpio.spiDataRW(activeDisplay->cs, pixels, count * 3); -} - -void lcd_drawPx(uint8 x, uint8 y, uint8 r, uint8 g, uint8 b) -{ - if(lcd_setWindow(x, y, x, y)) return; - lcd_pushPx(r, g, b); -} /* lcdst_drawPx */ - -void lcd_fillRect(uint8 x, uint8 y, uint8 w, uint8 h, - uint8 r, uint8 g, uint8 b) -{ - /* Draw only in the display space */ - if((w == 0) || (h == 0)) return; - if((x+w-1) >= activeDisplay->width) w = activeDisplay->width - x; - if((y+h-1) >= activeDisplay->height) h = activeDisplay->height - y; - - /* Draw the filled rectangle */ - if(lcd_setWindow(x, y, x+w-1, y+h-1)) return; - -#define BUFFER_PIXELS 64 - int wh = w*h; - uint8 buffer[BUFFER_PIXELS * sizeof(uint8) * 3]; - for (int p = 0; p < wh; p += BUFFER_PIXELS) { - for(int pb = 0; pb < BUFFER_PIXELS; pb++) { - buffer[pb * 3 + 0] = r; - buffer[pb * 3 + 1] = g; - buffer[pb * 3 + 2] = b; - } - int rem = wh - p; - lcd_pushPixels(buffer, ((rem < BUFFER_PIXELS) ? rem : BUFFER_PIXELS)); - } -} - -void lcd_fillScreen(uint8 r, uint8 g, uint8 b) -{ - /* Fill the whole screen with one color */ - lcd_fillRect(0, 0, activeDisplay->width, activeDisplay->height, r, g, b); -} /* lcdst_drawScreen */ - -void lcd_pushChar(char c) -{ - char* bitmap = font8x8_basic[(unsigned int) c]; - int x,y; - int set; - int mask; - for (x=0; x < 8; x++) { - for (y=0; y < 8; y++) { - set = bitmap[x] & 1 << y; - printf("%c", set ? 'X' : ' '); - if (set) { - lcd_pushPx(200, 0, 0); - } else { - lcd_pushPx(0, 0, 0); - } - } - printf("\n"); - } -} - -void lcd_printChar(uint8 x, uint8 y, char c) -{ - lcd_setWindow(x, y, x+8 - 1, y+8 - 1); - lcd_pushChar(c); -} - -void lcd_printText(uint8 x, uint8 y, char* text) -{ - for (int i = 0; i < strlen(text); i++) { - lcd_printChar(x + i * 8, y, text[i]); - } + gpio.spiDataRW(activeDisplay->channel, pixels, count * 3); } diff --git a/st7735.h b/st7735.h index 5211478..cd83b45 100644 --- a/st7735.h +++ b/st7735.h @@ -1,100 +1,4 @@ -#ifndef uint8 -#define uint8 unsigned char -#endif - -typedef struct -{ - int cs, a0, rs; - uint8 width, height; -} lcd_t; +#include "spilcd.h" -/* - * Initialize the display and create a data structure for it. - * The last initialized display is active. - * - * Parameters: - * spiSpeed - Speed of the SPI interface. - * cs - Chip selection pin. - * a0 - Data/Command pin. - * rs - Optional reset pin. If you do not use it, enter -1. - * - * Return: Pointer to the structure with display data. - * - */ -lcd_t *lcd_init(int spiSpeed, int cs, int a0, int rs); +// TODO: optional HW-specific functions -/* - * Reset the specified display and clear the previously assigned memory. - * - * Parameters: - * display - Pointer to the structure with display data. - * - * Return: void - */ -void lcd_deinit(lcd_t *display); - -/* - * Set the drawing area on the currently active display. - * - * Parameters: - * x1 - The X parameter of the first point. - * y1 - The Y parameter of the first point. - * x2 - The X parameter of the second point. - * y2 - The Y parameter of the second point. - * - * Return: Confirmation of the occurrence or non-occurrence of an error. - * 0 - The error did not occur; 1 - The error occurred. - * - */ -uint8 lcd_setWindow(uint8 x1, uint8 y1, uint8 x2, uint8 y2); - -/* - * Draw one pixel on the currently active display. - * The color intensity scale for a normal pixel is from 0 to 255. - * The color intensity scale for the reduced pixel is from 0 to 15. - * - * Parameters: - * x - The X parameter of the pixel. - * y - The Y parameter of the pixel. - * r - The intensity of the red color. - * g - The intensity of the green color. - * b - The intensity of the blue color. - * - * Return: void - */ -void lcd_drawPx(uint8 x, uint8 y, uint8 r, uint8 g, uint8 b); - -/* - * Draw a filled rectangle on the currently active display. - * The color intensity scale for a normal pixel is from 0 to 255. - * The color intensity scale for the reduced pixel is from 0 to 15. - * - * Parameters: - * x - Parameter X of the upper left corner of the rectangle. - * y - Parameter Y of the upper left corner of the rectangle. - * w - The width of the rectangle. - * h - The height of the rectangle. - * r - The intensity of the red color. - * g - The intensity of the green color. - * b - The intensity of the blue color. - * - * Return: void - */ -void lcd_fillRect(uint8 x, uint8 y, uint8 w, uint8 h, uint8 r, uint8 g, uint8 b); - -/* - * Fill the entire screen with one color of the currently active display. - * The color intensity scale for a normal pixel is from 0 to 255. - * The color intensity scale for the reduced pixel is from 0 to 15. - * - * Parameters: - * r - The intensity of the red color. - * g - The intensity of the green color. - * b - The intensity of the blue color. - * - * Return: void - */ -void lcd_fillScreen(uint8 r, uint8 g, uint8 b); - -void lcd_printChar(uint8 x, uint8 y, char c); -void lcd_printText(uint8 x, uint8 y, char* text);