51b292d3b9
100 kHz PWM period made small induction coil onboard LCD to moan if the pulse width was smaller than 100%. I changed it to 1MHz.
242 lines
6.6 KiB
C
242 lines
6.6 KiB
C
/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/gdisp/SSD2119/gdisp_lld_board_embest_dmstf4bb.h
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* @brief GDISP Graphic Driver subsystem board GPIO interface for the SSD2119 display.
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*
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* @addtogroup GDISP
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* @{
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*/
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#ifndef _GDISP_LLD_BOARD_H
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#define _GDISP_LLD_BOARD_H
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#define SET_CS palSetPad(GPIOD, 7);
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#define CLR_CS palClearPad(GPIOD, 7);
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#define SET_DC palSetPad(GPIOE, 3);
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#define CLR_DC palClearPad(GPIOE, 3);
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#define SET_WR palSetPad(GPIOD, 5);
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#define CLR_WR palClearPad(GPIOD, 5);
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#define SET_RD palSetPad(GPIOD, 4);
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#define CLR_RD palClearPad(GPIOD, 4);
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#define SET_RST palSetPad(GPIOD, 3);
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#define CLR_RST palClearPad(GPIOD, 3);
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/* PWM configuration structure. We use timer 4 channel 2 (orange LED on board). */
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static const PWMConfig pwmcfg = {
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1000000, /* 1 MHz PWM clock frequency. */
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100, /* PWM period is 100 cycles. */
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NULL,
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{
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{PWM_OUTPUT_ACTIVE_HIGH, NULL},
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{PWM_OUTPUT_ACTIVE_HIGH, NULL},
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{PWM_OUTPUT_ACTIVE_HIGH, NULL},
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{PWM_OUTPUT_ACTIVE_HIGH, NULL}
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},
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0
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};
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/**
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* @brief Initialise the board for the display.
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* @notes This board definition uses GPIO and assumes exclusive access to these GPIO pins
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*
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* @notapi
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*/
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static __inline void init_board(void) {
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// D0 - D15
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palSetPadMode(GPIOD, 14, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 15, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 0, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 1, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 7, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 8, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 9, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 10, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 11, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 12, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 13, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 14, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOE, 15, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 8, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 9, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(GPIOD, 10, PAL_MODE_OUTPUT_PUSHPULL);
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// RST
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palSetPadMode(GPIOD, 3, PAL_MODE_OUTPUT_PUSHPULL);
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// CS
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palSetPadMode(GPIOD, 7, PAL_MODE_OUTPUT_PUSHPULL);
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// DC
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palSetPadMode(GPIOE, 3, PAL_MODE_OUTPUT_PUSHPULL);
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// RD
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palSetPadMode(GPIOD, 4, PAL_MODE_OUTPUT_PUSHPULL);
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// WR
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palSetPadMode(GPIOD, 5, PAL_MODE_OUTPUT_PUSHPULL);
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/* Configure the pins to a well know state */
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SET_DC;
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SET_RD;
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SET_WR;
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CLR_CS;
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//SET_RST;
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/* Display backlight control */
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/* TIM4 is an alternate function 2 (AF2) */
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pwmStart(&PWMD4, &pwmcfg);
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palSetPadMode(GPIOD, 13, PAL_MODE_ALTERNATE(2));
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pwmEnableChannel(&PWMD4, 1, 100);
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}
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/**
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* @brief Set or clear the lcd reset pin.
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*
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* @param[in] state TRUE = lcd in reset, FALSE = normal operation
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*
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* @notapi
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*/
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static __inline void setpin_reset(bool_t state) {
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if (state) {
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CLR_RST;
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} else {
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SET_RST;
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}
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}
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/**
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* @brief Set the lcd back-light level.
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*
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* @param[in] percent 0 to 100%
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*
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* @notapi
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*/
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static __inline void set_backlight(uint8_t percent) {
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pwmEnableChannel(&PWMD4, 1, percent);
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}
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/**
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* @brief Take exclusive control of the bus
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*
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* @notapi
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*/
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static __inline void acquire_bus(void) {
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/* Nothing to do here since LCD is the only device on that bus */
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}
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/**
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* @brief Release exclusive control of the bus
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*
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* @notapi
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*/
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static __inline void release_bus(void) {
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/* Nothing to do here since LCD is the only device on that bus */
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}
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/**
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* @brief Send data to the index register.
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*
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* @param[in] index The index register to set
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*
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* @notapi
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*/
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static __inline void write_index(uint16_t index) {
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// D0 - D15
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palWritePad(GPIOD, 14, index & 1);
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palWritePad(GPIOD, 15, (index >> 1) & 1);
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palWritePad(GPIOD, 0, (index >> 2) & 1);
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palWritePad(GPIOD, 1, (index >> 3) & 1);
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palWritePad(GPIOE, 7, (index >> 4) & 1);
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palWritePad(GPIOE, 8, (index >> 5) & 1);
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palWritePad(GPIOE, 9, (index >> 6) & 1);
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palWritePad(GPIOE, 10, (index >> 7) & 1);
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palWritePad(GPIOE, 11, (index >> 8) & 1);
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palWritePad(GPIOE, 12, (index >> 9) & 1);
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palWritePad(GPIOE, 13, (index >> 10) & 1);
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palWritePad(GPIOE, 14, (index >> 11) & 1);
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palWritePad(GPIOE, 15, (index >> 12) & 1);
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palWritePad(GPIOD, 8, (index >> 13) & 1);
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palWritePad(GPIOD, 9, (index >> 14) & 1);
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palWritePad(GPIOD, 10, (index >> 15) & 1);
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/* Control lines */
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CLR_DC; CLR_WR; SET_WR; SET_DC;
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}
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/**
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* @brief Send data to the lcd.
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*
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* @param[in] data The data to send
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*
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* @notapi
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*/
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static __inline void write_data(uint16_t data) {
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// D0 - D15
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palWritePad(GPIOD, 14, data & 1);
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palWritePad(GPIOD, 15, (data >> 1) & 1);
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palWritePad(GPIOD, 0, (data >> 2) & 1);
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palWritePad(GPIOD, 1, (data >> 3) & 1);
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palWritePad(GPIOE, 7, (data >> 4) & 1);
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palWritePad(GPIOE, 8, (data >> 5) & 1);
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palWritePad(GPIOE, 9, (data >> 6) & 1);
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palWritePad(GPIOE, 10, (data >> 7) & 1);
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palWritePad(GPIOE, 11, (data >> 8) & 1);
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palWritePad(GPIOE, 12, (data >> 9) & 1);
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palWritePad(GPIOE, 13, (data >> 10) & 1);
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palWritePad(GPIOE, 14, (data >> 11) & 1);
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palWritePad(GPIOE, 15, (data >> 12) & 1);
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palWritePad(GPIOD, 8, (data >> 13) & 1);
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palWritePad(GPIOD, 9, (data >> 14) & 1);
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palWritePad(GPIOD, 10, (data >> 15) & 1);
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/* Control lines */
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CLR_WR; SET_WR;
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}
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#if GDISP_HARDWARE_READPIXEL || GDISP_HARDWARE_SCROLL || defined(__DOXYGEN__)
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/**
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* @brief Read data from the lcd.
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*
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* @return The data from the lcd
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* @note The chip select may need to be asserted/de-asserted
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* around the actual spi read
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*
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* @notapi
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*/
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static __inline uint16_t read_data(void) {
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uint16_t value;
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/*
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// change pin mode to digital input
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palSetGroupMode(GPIOE, PAL_WHOLE_PORT, 0, PAL_MODE_INPUT);
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CLR_RD;
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value = palReadPort(GPIOE);
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value = palReadPort(GPIOE);
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SET_RD;
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// change pin mode back to digital output
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palSetGroupMode(GPIOE, PAL_WHOLE_PORT, 0, PAL_MODE_OUTPUT_PUSHPULL);
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*/
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return value;
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}
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#endif
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#endif /* _GDISP_LLD_BOARD_H */
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/** @} */
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