bbb2d434c4
Convert SSD1289 to use board files. Update Nokia driver to use short names in the board files. Full expanded names are not needed as they are all static inline routines.
197 lines
6.4 KiB
C
197 lines
6.4 KiB
C
/*
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ChibiOS/RT - 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/Nokia6610/gdisp_lld_board_olimexsam7ex256.h
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* @brief GDISP Graphic Driver subsystem board interface for the Olimex SAM7-EX256 board.
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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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// ******************************************************
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// Pointers to AT91SAM7X256 peripheral data structures
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// ******************************************************
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volatile AT91PS_PIO pPIOA = AT91C_BASE_PIOA;
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volatile AT91PS_PIO pPIOB = AT91C_BASE_PIOB;
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volatile AT91PS_SPI pSPI = AT91C_BASE_SPI0;
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volatile AT91PS_PMC pPMC = AT91C_BASE_PMC;
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volatile AT91PS_PDC pPDC = AT91C_BASE_PDC_SPI0;
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/**
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* @brief Initialise the board for the display.
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* @notes Performs the following functions:
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* 1. initialise the spi port used by your display
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* 2. initialise the reset pin (initial state not-in-reset)
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* 3. initialise the chip select pin (initial state not-active)
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* 4. initialise the backlight pin (initial state back-light off)
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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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// *********************************************************************************************
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// InitSpi( )
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//
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// Sets up SPI channel 0 for communications to Nokia 6610 LCD Display
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//
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// I/O ports used: PA2 = LCD Reset (set to low to reset)
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// PA12 = LCD chip select (set to low to select the LCD chip)
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// PA16 = SPI0_MISO Master In - Slave Out (not used in LCD interface)
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// PA17 = SPI0_MOSI Master Out - Slave In pin (Serial Data to LCD slave)
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// PA18 = SPI0_SPCK Serial Clock (to LCD slave)
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// PB20 = backlight control (normally PWM control, 1 = full on)
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//
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// *********************************************************************************************}
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/* This code should really use the ChibiOS driver for these functions */
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// Pin for backlight
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pPIOB->PIO_CODR = PIOB_LCD_BL_MASK; // Set PB20 to LOW
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pPIOB->PIO_OER = PIOB_LCD_BL_MASK; // Configure PB20 as output
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// Reset pin
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pPIOA->PIO_SODR = PIOA_LCD_RESET_MASK; // Set PA2 to HIGH
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pPIOA->PIO_OER = PIOA_LCD_RESET_MASK; // Configure PA2 as output
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// CS pin - this seems to be ignored
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// pPIOA->PIO_SODR = 1<<12; // Set PA2 to HIGH
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// pPIOA->PIO_OER = 1<<12; // Configure PA2 as output
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// Init SPI0
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// Disable the following pins from PIO control (will be used instead by the SPI0 peripheral)
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// BIT12 = PA12 -> SPI0_NPCS0 chip select
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// BIT16 = PA16 -> SPI0_MISO Master In - Slave Out (not used in LCD interface)
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// BIT17 = PA17 -> SPI0_MOSI Master Out - Slave In pin (Serial Data to LCD slave)
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// BIT18 = PA18 -> SPI0_SPCK Serial Clock (to LCD slave)
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pPIOA->PIO_PDR = (1<<12) | (1<<16) | (1<<17) | (1<<18);
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pPIOA->PIO_ASR = (1<<12) | (1<<16) | (1<<17) | (1<<18);
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pPIOA->PIO_BSR = 0;
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//enable the clock of SPI
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pPMC->PMC_PCER = 1 << AT91C_ID_SPI0;
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// Fixed mode
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pSPI->SPI_CR = 0x81; //SPI Enable, Sowtware reset
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pSPI->SPI_CR = 0x01; //SPI Enable
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//pSPI->SPI_MR = 0xE0019; //Master mode, fixed select, disable decoder, FDIV=1 (MCK), PCS=1110
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pSPI->SPI_MR = 0xE0011; //Master mode, fixed select, disable decoder, FDIV=0 (MCK), PCS=1110
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//pSPI->SPI_CSR[0] = 0x01010C11; //9bit, CPOL=1, ClockPhase=0, SCLK = 48Mhz/32*12 = 125kHz
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pSPI->SPI_CSR[0] = 0x01010311; //9bit, CPOL=1, ClockPhase=0, SCLK = 48Mhz/8 = 6MHz if using commented MR line above
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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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palClearPad(IOPORT1, PIOA_LCD_RESET);
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else
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palSetPad(IOPORT1, PIOA_LCD_RESET);
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}
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/**
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* @brief Set the lcd back-light level.
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* @note For now 0% turns the backlight off, anything else the backlight is on.
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* While the hardware supports PWM backlight control, we are not using it
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* yet.
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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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if (percent)
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palSetPad(IOPORT2, PIOB_LCD_BL);
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else
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palClearPad(IOPORT2, PIOB_LCD_BL);
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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 get_bus(void) {
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// Nothing to do for this board as the LCD is the only device on the SPI port
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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 for this board as the LCD is the only device on the SPI port
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}
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/**
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* @brief Send an 8 bit command to the lcd.
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*
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* @param[in] cmd The command to send
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*
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* @notapi
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*/
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static __inline void write_cmd(uint16_t cmd) {
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// wait for the previous transfer to complete
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while((pSPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
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// send the command
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pSPI->SPI_TDR = cmd & 0xFF;
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}
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/**
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* @brief Send an 8 bit 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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// wait for the previous transfer to complete
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while((pSPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
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// send the data
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pSPI->SPI_TDR = data | 0x0100;
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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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*
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* @notapi
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*/
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static __inline uint16_t read_data(void) {
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#error "gdispNokia6610: GDISP_HARDWARE_READPIXEL and GDISP_HARDWARE_SCROLL are not supported on this board"
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return 0;
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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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