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RIOT/drivers/pcd8544/pcd8544.c
Bas Stottelaar 92b1dfc703 drivers/*: realign ENABLE_DEBUG
2020-10-23 01:26:09 +02:00

390 lines
13 KiB
C
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/*
* Copyright (C) 2015 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup drivers_pcd8544
* @{
* @file
* @brief Implementation of the SPI driver for the PDC8544 graphics display
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
* @}
*/
#include <stdint.h>
#include <stdio.h>
#include "xtimer.h"
#include "periph/spi.h"
#include "periph/gpio.h"
#include "pcd8544.h"
#include "pcd8544_internal.h"
#define ENABLE_DEBUG 0
#include "debug.h"
#define ASCII_MIN 0x20 /**< start of ASCII table */
#define ASCII_MAX 0x7e /**< end of ASCII table */
#define CHAR_WIDTH (6U) /**< pixel width of a single character */
#define SPI_CLK (SPI_CLK_1MHZ)
#define SPI_MODE (SPI_MODE_0)
static const uint8_t _ascii[][5] = {
{0x00, 0x00, 0x00, 0x00, 0x00},/* 20 SPACE*/
{0x00, 0x00, 0x5f, 0x00, 0x00},/* 21 ! */
{0x00, 0x07, 0x00, 0x07, 0x00},/* 22 " */
{0x14, 0x7f, 0x14, 0x7f, 0x14},/* 23 # */
{0x24, 0x2a, 0x7f, 0x2a, 0x12},/* 24 $ */
{0x23, 0x13, 0x08, 0x64, 0x62},/* 25 % */
{0x36, 0x49, 0x55, 0x22, 0x50},/* 26 & */
{0x00, 0x05, 0x03, 0x00, 0x00},/* 27 ' */
{0x00, 0x1c, 0x22, 0x41, 0x00},/* 28 ( */
{0x00, 0x41, 0x22, 0x1c, 0x00},/* 29 ) */
{0x14, 0x08, 0x3e, 0x08, 0x14},/* 2a * */
{0x08, 0x08, 0x3e, 0x08, 0x08},/* 2b + */
{0x00, 0x50, 0x30, 0x00, 0x00},/* 2c , */
{0x08, 0x08, 0x08, 0x08, 0x08},/* 2d - */
{0x00, 0x60, 0x60, 0x00, 0x00},/* 2e . */
{0x20, 0x10, 0x08, 0x04, 0x02},/* 2f / */
{0x3e, 0x51, 0x49, 0x45, 0x3e},/* 30 0 */
{0x00, 0x42, 0x7f, 0x40, 0x00},/* 31 1 */
{0x42, 0x61, 0x51, 0x49, 0x46},/* 32 2 */
{0x21, 0x41, 0x45, 0x4b, 0x31},/* 33 3 */
{0x18, 0x14, 0x12, 0x7f, 0x10},/* 34 4 */
{0x27, 0x45, 0x45, 0x45, 0x39},/* 35 5 */
{0x3c, 0x4a, 0x49, 0x49, 0x30},/* 36 6 */
{0x01, 0x71, 0x09, 0x05, 0x03},/* 37 7 */
{0x36, 0x49, 0x49, 0x49, 0x36},/* 38 8 */
{0x06, 0x49, 0x49, 0x29, 0x1e},/* 39 9 */
{0x00, 0x36, 0x36, 0x00, 0x00},/* 3a : */
{0x00, 0x56, 0x36, 0x00, 0x00},/* 3b ; */
{0x08, 0x14, 0x22, 0x41, 0x00},/* 3c < */
{0x14, 0x14, 0x14, 0x14, 0x14},/* 3d = */
{0x00, 0x41, 0x22, 0x14, 0x08},/* 3e > */
{0x02, 0x01, 0x51, 0x09, 0x06},/* 3f ? */
{0x32, 0x49, 0x79, 0x41, 0x3e},/* 40 @ */
{0x7e, 0x11, 0x11, 0x11, 0x7e},/* 41 A */
{0x7f, 0x49, 0x49, 0x49, 0x36},/* 42 B */
{0x3e, 0x41, 0x41, 0x41, 0x22},/* 43 C */
{0x7f, 0x41, 0x41, 0x22, 0x1c},/* 44 D */
{0x7f, 0x49, 0x49, 0x49, 0x41},/* 45 E */
{0x7f, 0x09, 0x09, 0x09, 0x01},/* 46 F */
{0x3e, 0x41, 0x49, 0x49, 0x7a},/* 47 G */
{0x7f, 0x08, 0x08, 0x08, 0x7f},/* 48 H */
{0x00, 0x41, 0x7f, 0x41, 0x00},/* 49 I */
{0x20, 0x40, 0x41, 0x3f, 0x01},/* 4a J */
{0x7f, 0x08, 0x14, 0x22, 0x41},/* 4b K */
{0x7f, 0x40, 0x40, 0x40, 0x40},/* 4c L */
{0x7f, 0x02, 0x0c, 0x02, 0x7f},/* 4d M */
{0x7f, 0x04, 0x08, 0x10, 0x7f},/* 4e N */
{0x3e, 0x41, 0x41, 0x41, 0x3e},/* 4f O */
{0x7f, 0x09, 0x09, 0x09, 0x06},/* 50 P */
{0x3e, 0x41, 0x51, 0x21, 0x5e},/* 51 Q */
{0x7f, 0x09, 0x19, 0x29, 0x46},/* 52 R */
{0x46, 0x49, 0x49, 0x49, 0x31},/* 53 S */
{0x01, 0x01, 0x7f, 0x01, 0x01},/* 54 T */
{0x3f, 0x40, 0x40, 0x40, 0x3f},/* 55 U */
{0x1f, 0x20, 0x40, 0x20, 0x1f},/* 56 V */
{0x3f, 0x40, 0x38, 0x40, 0x3f},/* 57 W */
{0x63, 0x14, 0x08, 0x14, 0x63},/* 58 X */
{0x07, 0x08, 0x70, 0x08, 0x07},/* 59 Y */
{0x61, 0x51, 0x49, 0x45, 0x43},/* 5a Z */
{0x00, 0x7f, 0x41, 0x41, 0x00},/* 5b [ */
{0x02, 0x04, 0x08, 0x10, 0x20},/* 5c \ */
{0x00, 0x41, 0x41, 0x7f, 0x00},/* 5d ] */
{0x04, 0x02, 0x01, 0x02, 0x04},/* 5e ^ */
{0x40, 0x40, 0x40, 0x40, 0x40},/* 5f _ */
{0x00, 0x01, 0x02, 0x04, 0x00},/* 60 ` */
{0x20, 0x54, 0x54, 0x54, 0x78},/* 61 a */
{0x7f, 0x48, 0x44, 0x44, 0x38},/* 62 b */
{0x38, 0x44, 0x44, 0x44, 0x20},/* 63 c */
{0x38, 0x44, 0x44, 0x48, 0x7f},/* 64 d */
{0x38, 0x54, 0x54, 0x54, 0x18},/* 65 e */
{0x08, 0x7e, 0x09, 0x01, 0x02},/* 66 f */
{0x0c, 0x52, 0x52, 0x52, 0x3e},/* 67 g */
{0x7f, 0x08, 0x04, 0x04, 0x78},/* 68 h */
{0x00, 0x44, 0x7d, 0x40, 0x00},/* 69 i */
{0x20, 0x40, 0x44, 0x3d, 0x00},/* 6a j */
{0x7f, 0x10, 0x28, 0x44, 0x00},/* 6b k */
{0x00, 0x41, 0x7f, 0x40, 0x00},/* 6c l */
{0x7c, 0x04, 0x18, 0x04, 0x78},/* 6d m */
{0x7c, 0x08, 0x04, 0x04, 0x78},/* 6e n */
{0x38, 0x44, 0x44, 0x44, 0x38},/* 6f o */
{0x7c, 0x14, 0x14, 0x14, 0x08},/* 70 p */
{0x08, 0x14, 0x14, 0x18, 0x7c},/* 71 q */
{0x7c, 0x08, 0x04, 0x04, 0x08},/* 72 r */
{0x48, 0x54, 0x54, 0x54, 0x20},/* 73 s */
{0x04, 0x3f, 0x44, 0x40, 0x20},/* 74 t */
{0x3c, 0x40, 0x40, 0x20, 0x7c},/* 75 u */
{0x1c, 0x20, 0x40, 0x20, 0x1c},/* 76 v */
{0x3c, 0x40, 0x30, 0x40, 0x3c},/* 77 w */
{0x44, 0x28, 0x10, 0x28, 0x44},/* 78 x */
{0x0c, 0x50, 0x50, 0x50, 0x3c},/* 79 y */
{0x44, 0x64, 0x54, 0x4c, 0x44},/* 7a z */
{0x00, 0x08, 0x36, 0x41, 0x00},/* 7b { */
{0x00, 0x00, 0x7f, 0x00, 0x00},/* 7c | */
{0x00, 0x41, 0x36, 0x08, 0x00},/* 7d } */
{0x10, 0x08, 0x08, 0x10, 0x08},/* 7e ~ */
};
static const uint8_t _riot[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfc, 0x7e,
0x3e, 0x3e, 0x1f, 0x1f, 0x1f, 0x1f, 0x3f, 0x3e,
0x7e, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0x80, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xfc, 0xff, 0xff, 0xff, 0xff,
0x07, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff,
0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
0xc0, 0xc0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
0xe0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf8, 0xfc, 0xfc,
0x7e, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xc0, 0xf0, 0xf8, 0xfc, 0xfe, 0x3f,
0x1f, 0x0f, 0x0f, 0x07, 0x07, 0x07, 0x03, 0x03,
0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff,
0xfe, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x83,
0x81, 0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xff, 0xff,
0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0,
0xff, 0xff, 0xff, 0xff, 0x3f, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x0f, 0x3f, 0xff, 0xff,
0xfc, 0xf0, 0xe0, 0x80, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x03, 0x0f, 0x1f, 0x3f, 0x3f, 0x7e,
0x7c, 0x78, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0x78,
0x7c, 0x7e, 0x3f, 0x3f, 0x1f, 0x0f, 0x07, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x0f, 0x1f, 0x3f, 0x3f,
0x1f, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static inline void lock(const pcd8544_t *dev)
{
spi_acquire(dev->spi, dev->cs, SPI_MODE, SPI_CLK);
}
static inline void done(const pcd8544_t *dev)
{
spi_release(dev->spi);
}
static void _write(const pcd8544_t *dev, uint8_t is_data, uint8_t data)
{
/* set command or data mode */
gpio_write(dev->mode, is_data);
/* write byte to LCD */
spi_transfer_bytes(dev->spi, dev->cs, false, &data, NULL, 1);
}
static inline void _set_x(const pcd8544_t *dev, uint8_t x)
{
_write(dev, MODE_CMD, CMD_SET_X | x);
}
static inline void _set_y(const pcd8544_t *dev, uint8_t y)
{
_write(dev, MODE_CMD, CMD_SET_Y | y);
}
int pcd8544_init(pcd8544_t *dev, spi_t spi, gpio_t cs, gpio_t reset, gpio_t mode)
{
/* save pin mapping */
dev->spi = spi;
dev->cs = cs;
dev->reset = reset;
dev->mode = mode;
dev->inverted = 0;
DEBUG("done setting dev members\n");
/* initialize pins */
gpio_init(reset, GPIO_OUT);
gpio_init(mode, GPIO_OUT);
DEBUG("done with gpios\n");
/* clear CS line */
DEBUG("done clearing CS line\n");
/* initialize SPI */
spi_init_cs(spi, (spi_cs_t)cs);
DEBUG("done initializing SPI master\n");
/* reset display */
gpio_clear(reset);
xtimer_usleep(RESET_DELAY);
gpio_set(reset);
/* clear display memory */
pcd8544_clear(dev);
/* write initialization sequence to display */
pcd8544_set_contrast(dev, PCD8544_DEFAULT_CONTRAST);
pcd8544_set_bias(dev, PCD8544_DEFAULT_BIAS);
pcd8544_set_tempcoef(dev, PCD8544_DEFAULT_TEMPCOEF);
/* enable display */
lock(dev);
_write(dev, MODE_CMD, CMD_ENABLE_H);
_write(dev, MODE_CMD, CMD_MODE_NORMAL);
done(dev);
return 0;
}
void pcd8544_set_contrast(const pcd8544_t *dev, uint8_t contrast)
{
if (contrast > CONTRAST_MAX) {
contrast = CONTRAST_MAX;
}
lock(dev);
_write(dev, MODE_CMD, CMD_EXTENDED);
_write(dev, MODE_CMD, (CMD_EXT_CONTRAST | contrast));
_write(dev, MODE_CMD, CMD_ENABLE_H);
done(dev);
}
void pcd8544_set_tempcoef(const pcd8544_t *dev, uint8_t coef)
{
if (coef > TEMP_MAX) {
coef = TEMP_MAX;
}
lock(dev);
_write(dev, MODE_CMD, CMD_EXTENDED);
_write(dev, MODE_CMD, (CMD_EXT_TEMP | coef));
_write(dev, MODE_CMD, CMD_ENABLE_H);
done(dev);
}
void pcd8544_set_bias(const pcd8544_t *dev, uint8_t bias)
{
if (bias > BIAS_MAX) {
bias = BIAS_MAX;
}
lock(dev);
_write(dev, MODE_CMD, CMD_EXTENDED);
_write(dev, MODE_CMD, (CMD_EXT_BIAS | bias));
_write(dev, MODE_CMD, CMD_ENABLE_H);
done(dev);
}
void pcd8544_riot(const pcd8544_t *dev)
{
pcd8544_write_img(dev, _riot);
}
void pcd8544_write_img(const pcd8544_t *dev, const uint8_t img[])
{
/* set initial position */
lock(dev);
_set_x(dev, 0);
_set_y(dev, 0);
/* write image data to display */
for (unsigned i = 0; i < (PCD8544_RES_X * PCD8544_RES_Y / 8); i++) {
_write(dev, MODE_DTA, img[i]);
}
done(dev);
}
void pcd8544_write_c(const pcd8544_t *dev, uint8_t x, uint8_t y, char c)
{
/* check position */
if (x >= PCD8544_COLS || y >= PCD8544_ROWS) {
return ;
}
/* set position */
lock(dev);
_set_x(dev, x * CHAR_WIDTH);
_set_y(dev, y);
/* write char */
for (unsigned i = 0; i < CHAR_WIDTH - 1; i++) {
_write(dev, MODE_DTA, _ascii[c - ASCII_MIN][i]);
}
_write(dev, MODE_DTA, 0x00);
done(dev);
}
void pcd8544_write_s(const pcd8544_t *dev, uint8_t x, uint8_t y, const char *s)
{
for (; (*s != '\0') && x < PCD8544_COLS; x++, s++) {
pcd8544_write_c(dev, x, y, *s);
}
}
void pcd8544_clear(const pcd8544_t *dev)
{
lock(dev);
_set_x(dev, 0);
_set_y(dev, 0);
for (unsigned i = 0; i < PCD8544_RES_X * PCD8544_ROWS; i++) {
_write(dev, MODE_DTA, 0x00);
}
done(dev);
}
void pcd8544_invert(pcd8544_t *dev)
{
lock(dev);
if (dev->inverted) {
_write(dev, MODE_CMD, CMD_MODE_NORMAL);
}
else {
_write(dev, MODE_CMD, CMD_MODE_INVERSE);
}
dev->inverted ^= 0x01;
done(dev);
}
int pcd8544_is_inverted(const pcd8544_t *dev)
{
return dev->inverted;
}
void pcd8544_poweron(const pcd8544_t *dev)
{
lock(dev);
_write(dev, MODE_CMD, CMD_ENABLE_H);
done(dev);
}
void pcd8544_poweroff(const pcd8544_t *dev)
{
lock(dev);
_write(dev, MODE_CMD, CMD_DISABLE);
done(dev);
}
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