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Diffstat (limited to 'boards/base/Olimex-SAM7EX256-GE8/board_Nokia6610GE8.h')
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1 files changed, 195 insertions, 0 deletions
diff --git a/boards/base/Olimex-SAM7EX256-GE8/board_Nokia6610GE8.h b/boards/base/Olimex-SAM7EX256-GE8/board_Nokia6610GE8.h new file mode 100644 index 00000000..c88dbe74 --- /dev/null +++ b/boards/base/Olimex-SAM7EX256-GE8/board_Nokia6610GE8.h @@ -0,0 +1,195 @@ +/* + * This file is subject to the terms of the GFX License. If a copy of + * the license was not distributed with this file, you can obtain one at: + * + * http://ugfx.org/license.html + */ + +/** + * @file boards/base/Olimex-SAM7EX256-GE8/board_Nokia6610GE8.h + * @brief GDISP Graphic Driver subsystem board interface for the Olimex SAM7-EX256 board. + */ + +#ifndef _GDISP_LLD_BOARD_H +#define _GDISP_LLD_BOARD_H + +/* + * Set various display properties. These properties mostly depend on the exact controller chip you get. + * The defaults should work for most controllers. + */ +//#define GDISP_GE8_BROKEN_CONTROLLER FALSE // Uncomment this out if you have a controller thats not window wrap broken. +//#define GDISP_SCREEN_HEIGHT 130 // The visible display height +//#define GDISP_SCREEN_WIDTH 130 // The visible display width +//#define GDISP_RAM_X_OFFSET 0 // The x offset of the visible area +//#define GDISP_RAM_Y_OFFSET 2 // The y offset of the visible area +//#define GDISP_SLEEP_SIZE 32 // The size of the sleep mode partial display +//#define GDISP_SLEEP_POS 50 // The position of the sleep mode partial display +//#define GDISP_INITIAL_CONTRAST 38 // The initial contrast percentage +//#define GDISP_INITIAL_BACKLIGHT 100 // The initial backlight percentage + +// For a multiple display configuration we would put all this in a structure and then +// set g->board to that structure. + +// ****************************************************** +// Pointers to AT91SAM7X256 peripheral data structures +// ****************************************************** +static volatile AT91PS_PIO pPIOA = AT91C_BASE_PIOA; +static volatile AT91PS_PIO pPIOB = AT91C_BASE_PIOB; +static volatile AT91PS_SPI pSPI = AT91C_BASE_SPI0; +static volatile AT91PS_PMC pPMC = AT91C_BASE_PMC; +static volatile AT91PS_PDC pPDC = AT91C_BASE_PDC_SPI0; + +/* The PWM backlight control is non-linear on this board. + * We pick values here that make it look a bit more linear. + */ +#define PWM_TOP_VALUE 500 +#define PWM_BOTTOM_VALUE 200 + +#define PWM_VALUE(x) (PWM_BOTTOM_VALUE+(PWM_TOP_VALUE-PWM_BOTTOM_VALUE)*(x)/100) + +/* PWM configuration structure. The LCD Backlight is on PWM1/PB20 ie PWM2/PIN1 in ChibiOS speak */ +static const PWMConfig pwmcfg = { + 1000000, /* 1 MHz PWM clock frequency. Ignored as we are using PWM_MCK_DIV_n */ + 1000, /* PWM period is 1000 cycles. */ + NULL, + { + {PWM_MCK_DIV_1 | PWM_OUTPUT_ACTIVE_HIGH | PWM_OUTPUT_PIN1 | PWM_DISABLEPULLUP_PIN1, NULL}, + }, +}; + +static bool_t pwmRunning = FALSE; + +/** + * @brief Initialise the board for the display. + * @notes Performs the following functions: + * 1. initialise the spi port used by your display + * 2. initialise the reset pin (initial state not-in-reset) + * 3. initialise the chip select pin (initial state not-active) + * 4. initialise the backlight pin (initial state back-light off) + * + * @notapi + */ +static inline void init_board(GDisplay *g) { + + // As we are not using multiple displays we set g->board to NULL as we don't use it. + g->board = 0; + + switch(g->controllerdisplay) { + case 0: // Set up for Display 0 + // ********************************************************************************************* + // InitSpi( ) + // + // Sets up SPI channel 0 for communications to Nokia 6610 LCD Display + // + // I/O ports used: PA2 = LCD Reset (set to low to reset) + // PA12 = LCD chip select (set to low to select the LCD chip) + // PA16 = SPI0_MISO Master In - Slave Out (not used in LCD interface) + // PA17 = SPI0_MOSI Master Out - Slave In pin (Serial Data to LCD slave) + // PA18 = SPI0_SPCK Serial Clock (to LCD slave) + // PB20 = backlight control (normally PWM control, 1 = full on) + // + // *********************************************************************************************} + + /* This code should really use the ChibiOS driver for these functions */ + + // Pin for backlight + pPIOB->PIO_CODR = PIOB_LCD_BL_MASK; // Set PB20 to LOW + pPIOB->PIO_OER = PIOB_LCD_BL_MASK; // Configure PB20 as output + + // Reset pin + pPIOA->PIO_SODR = PIOA_LCD_RESET_MASK; // Set PA2 to HIGH + pPIOA->PIO_OER = PIOA_LCD_RESET_MASK; // Configure PA2 as output + + // CS pin - this seems to be ignored + // pPIOA->PIO_SODR = 1<<12; // Set PA2 to HIGH + // pPIOA->PIO_OER = 1<<12; // Configure PA2 as output + + // Init SPI0 + // Disable the following pins from PIO control (will be used instead by the SPI0 peripheral) + // BIT12 = PA12 -> SPI0_NPCS0 chip select + // BIT16 = PA16 -> SPI0_MISO Master In - Slave Out (not used in LCD interface) + // BIT17 = PA17 -> SPI0_MOSI Master Out - Slave In pin (Serial Data to LCD slave) + // BIT18 = PA18 -> SPI0_SPCK Serial Clock (to LCD slave) + pPIOA->PIO_PDR = (1<<12) | (1<<16) | (1<<17) | (1<<18); + pPIOA->PIO_ASR = (1<<12) | (1<<16) | (1<<17) | (1<<18); + pPIOA->PIO_BSR = 0; + + //enable the clock of SPI + pPMC->PMC_PCER = 1 << AT91C_ID_SPI0; + + // Fixed mode + pSPI->SPI_CR = 0x81; //SPI Enable, Software reset + pSPI->SPI_CR = 0x01; //SPI Enable + pSPI->SPI_MR = 0xE0011; //Master mode, fixed select, disable decoder, PCS=1110 + pSPI->SPI_CSR[0] = 0x01010311; //9bit, CPOL=1, ClockPhase=0, SCLK = 48Mhz/3 = 16MHz + + /* Display backlight control at 100% */ + pwmRunning = FALSE; + palSetPad(IOPORT2, PIOB_LCD_BL); + break; + } +} + +static inline void post_init_board(GDisplay *g) { + (void) g; +} + +static inline void setpin_reset(GDisplay *g, bool_t state) { + (void) g; + if (state) + palClearPad(IOPORT1, PIOA_LCD_RESET); + else + palSetPad(IOPORT1, PIOA_LCD_RESET); +} + +static inline void set_backlight(GDisplay *g, uint8_t percent) { + (void) g; + if (percent == 100) { + /* Turn the pin on - No PWM */ + if (pwmRunning) { + pwmStop(&PWMD2); + pwmRunning = FALSE; + } + palSetPad(IOPORT2, PIOB_LCD_BL); + } else if (percent == 0) { + /* Turn the pin off - No PWM */ + if (pwmRunning) { + pwmStop(&PWMD2); + pwmRunning = FALSE; + } + palClearPad(IOPORT2, PIOB_LCD_BL); + } else { + /* Use the PWM */ + if (!pwmRunning) { + pwmStart(&PWMD2, &pwmcfg); + pwmRunning = TRUE; + } + pwmEnableChannel(&PWMD2, 0, PWM_VALUE(percent)); + } +} + +static inline void acquire_bus(GDisplay *g) { + (void) g; +} + +static inline void release_bus(GDisplay *g) { + (void) g; +} + +static inline void write_index(GDisplay *g, uint16_t index) { + (void) g; + // wait for the previous transfer to complete + while((pSPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0); + // send the command + pSPI->SPI_TDR = index & 0xFF; +} + +static inline void write_data(GDisplay *g, uint16_t data) { + (void) g; + // wait for the previous transfer to complete + while((pSPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0); + // send the data + pSPI->SPI_TDR = data | 0x0100; +} + +#endif /* _GDISP_LLD_BOARD_H */ |