200 lines
6.6 KiB
C
200 lines
6.6 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-LCD-Driver.
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ChibiOS-LCD-Driver 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-LCD-Driver 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 gdispNokia6610/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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// mask definitions
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#define BIT0 0x00000001
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#define BIT1 0x00000002
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#define BIT2 0x00000004
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#define BIT3 0x00000008
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#define BIT4 0x00000010
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#define BIT5 0x00000020
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#define BIT6 0x00000040
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#define BIT7 0x00000080
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#define BIT8 0x00000100
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#define BIT9 0x00000200
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#define BIT10 0x00000400
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#define BIT11 0x00000800
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#define BIT12 0x00001000
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#define BIT13 0x00002000
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#define BIT14 0x00004000
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#define BIT15 0x00008000
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#define BIT16 0x00010000
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#define BIT17 0x00020000
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#define BIT18 0x00040000
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#define BIT19 0x00080000
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#define BIT20 0x00100000
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#define BIT21 0x00200000
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#define BIT22 0x00400000
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#define BIT23 0x00800000
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#define BIT24 0x01000000
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#define BIT25 0x02000000
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#define BIT26 0x04000000
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#define BIT27 0x08000000
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#define BIT28 0x10000000
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#define BIT29 0x20000000
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#define BIT30 0x40000000
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#define BIT31 0x80000000
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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 GDISP_LLD(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 = BIT12; // Set PA2 to HIGH
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// pPIOA->PIO_OER = BIT12; // 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 = BIT12 | BIT16 | BIT17 | BIT18;
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pPIOA->PIO_ASR = BIT12 | BIT16 | BIT17 | BIT18;
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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 GDISP_LLD(setpin_reset)(bool_t state) {
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if (state)
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palClearPad(IOPORT1, PIOA_LCD_RESET);
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// pPIOA->PIO_CODR = PIOA_LCD_RESET_MASK;
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else
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palSetPad(IOPORT1, PIOA_LCD_RESET);
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// pPIOA->PIO_SODR = PIOA_LCD_RESET_MASK;
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}
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/**
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* @brief Set or clear the lcd back-light pin.
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*
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* @param[in] state TRUE = lcd back-light on, FALSE = lcd back-light off
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*
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* @notapi
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*/
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static __inline void GDISP_LLD(setpin_backlight)(bool_t state) {
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if (state)
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palSetPad(IOPORT2, PIOB_LCD_BL);
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// pPIOB->PIO_SODR = PIOB_LCD_BL_MASK;
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else
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palClearPad(IOPORT2, PIOB_LCD_BL);
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// pPIOB->PIO_CODR = PIOB_LCD_BL_MASK;
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}
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/**
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* @brief Send a 9 bit command/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 GDISP_LLD(write_spi)(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;
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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 GDISP_LLD(read_spi)(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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