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TDISP fixes - by Frysk

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This commit is contained in:
Joel Bodenmann 2013-04-12 09:12:00 +02:00
parent ffabd740c6
commit df5c3fd6dd
3 changed files with 154 additions and 36 deletions
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108
drivers/tdisp/HD44780/tdisp_lld.c
View file

@ -32,21 +32,23 @@
#if GFX_USE_TDISP /*|| defined(__DOXYGEN__)*/
/* Include the hardware interface details */
#if defined(BOARD_OLIMEX_STM32_E407)
/* check first if the user has defined his/her own lowlevel-board file */
#if defined(TDISP_USE_CUSTOM_BOARD) && TDISP_USE_CUSTOM_BOARD
/* Include the user supplied board definitions */
#include "tdisp_lld_board.h"
#elif defined(BOARD_OLIMEX_STM32_E407)
#include "tdisp_lld_board_olimex_e407.h"
#elif defined(BOARD_ST_STM32F4_DISCOVERY)
#include "tdisp_lld_board_st_stm32f4_discovery.h"
#else
#include "tdisp_lld_board_example.h"
#endif
/* The user may override the default display size */
#ifndef TDISP_COLUMNS
#define TDISP_COLUMNS 16
#endif
#ifndef TDISP_ROWS
#define TDISP_ROWS 2
#define TDISP_ROWS 2
#endif
/* Controller Specific Properties */
@ -56,15 +58,15 @@
/* Define the properties of our controller */
tdispStruct TDISP = {
TDISP_COLUMNS, TDISP_ROWS, /* cols, rows */
TDISP_COLUMNS, TDISP_ROWS, /* cols, rows */
CUSTOM_CHAR_XBITS, CUSTOM_CHAR_YBITS, /* charBitsX, charBitsY */
CUSTOM_CHAR_COUNT /* maxCustomChars */
CUSTOM_CHAR_COUNT /* maxCustomChars */
};
/* Our display control */
#define DISPLAY_ON 0x04
#define CURSOR_ON 0x02
#define CURSOR_BLINK 0x01
#define TDISP_DISPLAY_ON 0x04
#define TDISP_CURSOR_ON 0x02
#define TDISP_CURSOR_BLINK 0x01
static uint8_t displaycontrol;
@ -72,28 +74,77 @@ static uint8_t displaycontrol;
bool_t tdisp_lld_init(void) {
/* initialise hardware */
init_board();
/* The first part is the initialing code.
* In this part only the lower nibble of the
* byte is written directly to the display, thus
* without write_cmd, which sends both high and
* low nibble.
*/
/* Give the LCD a little time to wake up */
chThdSleepMilliseconds(15);
/* write three times 0x03 to display
* with RS = low.
*/
palClearPad(PORT_CTRL, PIN_RS);
#if BUS_4BITS
writeToLCD(0x03); // 1x
writeToLCD(0x03); // 2x
writeToLCD(0x03); // 3x
/* Put display in 4-bit mode by
* write 0x02 to display.
*/
writeToLCD(0x02); // 4bit-modus
#else
writeToLCD(0x30); // 1x
writeToLCD(0x30); // 2x
writeToLCD(0x30); // 3x
#endif
/* wait some time */
chThdSleepMilliseconds(50);
write_cmd(0x38);
chThdSleepMilliseconds(64);
displaycontrol = DISPLAY_ON | CURSOR_ON | CURSOR_BLINK; // The default displaycontrol
write_cmd(0x08 | displaycontrol);
chThdSleepMicroseconds(50);
write_cmd(0x01); // Clear the screen
chThdSleepMilliseconds(5);
/* From this point on, the LCD accepts
* bytes sent with highnibbel first and than
*the lownibble.
*/
/* 4-bit modus, 2 lines en 5x7 characters */
write_cmd(0x28);
displaycontrol = TDISP_DISPLAY_ON;
/* set display on, cursor off and no blinking */
write_cmd(0x0C);
/* set cursor move direction */
write_cmd(0x06);
chThdSleepMicroseconds(50);
/* END OF INITIALISATION */
// /* wait some time */
// chThdSleepMilliseconds(50);
//
// write_cmd(0x38);
// chThdSleepMilliseconds(64);
//
// displaycontrol = DISPLAY_ON | CURSOR_ON | CURSOR_BLINK; // The default displaycontrol
// write_cmd(0x08 | displaycontrol);
// chThdSleepMicroseconds(50);
//
// write_cmd(0x01); // Clear the screen
// chThdSleepMilliseconds(5);
//
// write_cmd(0x06);
// chThdSleepMicroseconds(50);
return TRUE;
}
/* Clears the display. The display needs
* a long time to process this command. So
* an extra delay is insterted.
*/
void tdisp_lld_clear(void) {
write_cmd(0x01);
// chThdSleepMilliseconds(LONG_DELAY_MS);
}
void tdisp_lld_draw_char(char c) {
@ -122,11 +173,14 @@ void tdisp_lld_create_char(uint8_t address, uint8_t *charmap) {
int i;
write_cmd(0x40 | (address << 3));
for(i = 0; i < CUSTOM_CHAR_YBITS; i++)
for(i = 0; i < CUSTOM_CHAR_YBITS; i++) {
write_data(charmap[i]);
}
}
void tdisp_lld_control(uint16_t what, void *value) {
void tdisp_lld_control(uint16_t what, uint16_t value) {
switch(what) {
case TDISP_CTRL_BACKLIGHT:
if ((uint8_t)value)
@ -136,7 +190,7 @@ void tdisp_lld_control(uint16_t what, void *value) {
write_cmd(0x08 | displaycontrol);
break;
case TDISP_CTRL_CURSOR:
switch((cursorshape)value) {
switch((uint8_t)value) {
case cursorOff:
displaycontrol &= ~CURSOR_ON;
break;

81
drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h
View file

@ -30,41 +30,104 @@
#define _TDISP_LLD_BOARD_H
/* Configure these to match the hardware connections on your board */
#define BUS_4BITS FALSE
#define PORT_DATA GPIOG
#define PORT_CTRL GPIOE
#define BUS_4BITS TRUE
/* Configure the bitoffset in the dataport so they match with the
* hardware pins. An offset of 0 means bit0 stays at bit0 of the dataport.
* If the offset is set to 3, bit0 of the nibble will be positioned at
* P[A..G]3 of the hardware-port.
*/
#define hardware_offset 3
/* The port where the data is sent to. In the
* low-leveldriver het hardware_offset is taken
* into account. If for example the hardware_offset
* is set to 3, then de data will be sent to
* PE3, PE4, PE5 en PE6, if the dataport where GPIOE.
*/
#define PORT_DATA GPIOE
/* The port used to controle the controle lines of
* the display.
*/
#define PORT_CTRL GPIOD
/* Pin to controle the R/S-line of the display */
#define PIN_RS 0
#define PIN_RW 1
#define PIN_EN 2
/* Pin to controle the EN-line of the display */
#define PIN_EN 1
/* Pin to controle the R/W-pin of the display.
* If reading of the display is not used disable
* reading in the gfxconf.h and put a dummy value here
* as it will not be used.
*/
#define PIN_RW 7
static void init_board(void) {
/* Initialize the ports for data and controle-lines */
palSetGroupMode(PORT_CTRL, PAL_WHOLE_PORT, 0, PAL_MODE_OUTPUT_PUSHPULL);
palSetGroupMode(PORT_DATA, PAL_WHOLE_PORT, 0, PAL_MODE_OUTPUT_PUSHPULL);
palClearPad(PORT_CTRL, PIN_RW);
/* Set alle controle pins to low */
palClearPad(PORT_CTRL, PIN_RS);
palClearPad(PORT_CTRL, PIN_EN);
#if TDISP_NEED_READ
palClearPad(PORT_CTRL, PIN_RW);
#endif
}
/* This is the low-level routine for sending the bits
* to the LCD-display. This routine shifts
* the bits so they match the hardware port.
*/
static void writeToLCD(uint8_t data) {
palWritePort(PORT_DATA, data);
palWritePort(PORT_DATA, data<<hardware_offset);
palSetPad(PORT_CTRL, PIN_EN);
chThdSleepMicroseconds(1);
palClearPad(PORT_CTRL, PIN_EN);
/* wait a little while so that de display can process the data */
chThdSleepMicroseconds(5);
}
/* Writes a command to the display. The
* RS-line is pulled low and than the
* data is send.
*/
static void write_cmd(uint8_t data) {
palClearPad(PORT_CTRL, PIN_RS);
#if BUS_4BITS
/* first send the high-nibble */
writeToLCD(data>>4);
#endif
writeToLCD(data);
/* send the low-nibble */
#if BUS_4BITS
/* in 4-bit mode the high-nibble is zeroed out */
writeToLCD(data & 0x0F);
#else
writeToLCD(data);
#endif
}
// static void write_initcmd(uint8_t data) {
// write_cmd(data);
// }
/* Write data to the display. The
* RS-line is pulled high and than the
* data is send.
*/
static void write_data(uint8_t data) {
palSetPad(PORT_CTRL, PIN_RS);
#if BUS_4BITS
/* first send the high-nibble */
writeToLCD(data>>4);
#endif
writeToLCD(data);
/* send the low-nibble */
#if BUS_4BITS
/* in 4-bit mode the high-nibble is zeroed out */
writeToLCD(data & 0x0F);
#else
writeToLCD(data);
#endif
}
#endif /* _TDISP_LLD_BOARD_H */

1
releases.txt
View file

@ -25,6 +25,7 @@ FEATURE: First MIPS32 (PIC32) board files contributed by user 'Dmytro'
FEATURE: Added gwinDraw() routine
FEATURE: Added GINPUT Dial support and driver using GADC
FEATURE: Simplified assigning inputs to buttons and sliders
FIX: Some fixes for the HD44780 TDISP driver by the user 'Frysk'
*** changes after 1.4 ***