diff options
Diffstat (limited to 'drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h')
| -rw-r--r-- | drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h | 90 |
1 files changed, 70 insertions, 20 deletions
diff --git a/drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h b/drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h index ce0f7362..c8215c75 100644 --- a/drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h +++ b/drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h @@ -1,12 +1,12 @@ -/* - * 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 - */ +/*
+ * 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 drivers/gdisp/Nokia6610GE12/gdisp_lld_board_olimexsam7ex256.h
+ * @file drivers/gdisp/Nokia6610GE8/gdisp_lld_board_olimexsam7ex256.h
* @brief GDISP Graphic Driver subsystem board interface for the Olimex SAM7-EX256 board.
*
* @addtogroup GDISP
@@ -16,14 +16,46 @@ #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_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_POS 50 // The position of the sleep mode partial display
+//#define GDISP_INITIAL_CONTRAST 50 // The initial contrast percentage
+//#define GDISP_INITIAL_BACKLIGHT 100 // The initial backlight percentage
+
// ******************************************************
// Pointers to AT91SAM7X256 peripheral data structures
// ******************************************************
-volatile AT91PS_PIO pPIOA = AT91C_BASE_PIOA;
-volatile AT91PS_PIO pPIOB = AT91C_BASE_PIOB;
-volatile AT91PS_SPI pSPI = AT91C_BASE_SPI0;
-volatile AT91PS_PMC pPMC = AT91C_BASE_PMC;
-volatile AT91PS_PDC pPDC = AT91C_BASE_PDC_SPI0;
+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.
@@ -78,14 +110,14 @@ static inline void init_board(void) { pPMC->PMC_PCER = 1 << AT91C_ID_SPI0;
// Fixed mode
- pSPI->SPI_CR = 0x81; //SPI Enable, Sowtware reset
+ 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
- //pSPI->SPI_MR = 0xE0019; //Master mode, fixed select, disable decoder, FDIV=1 (MCK), PCS=1110
- pSPI->SPI_MR = 0xE0011; //Master mode, fixed select, disable decoder, FDIV=0 (MCK), PCS=1110
-
- //pSPI->SPI_CSR[0] = 0x01010C11; //9bit, CPOL=1, ClockPhase=0, SCLK = 48Mhz/32*12 = 125kHz
- pSPI->SPI_CSR[0] = 0x01010311; //9bit, CPOL=1, ClockPhase=0, SCLK = 48Mhz/8 = 6MHz if using commented MR line above
+ /* Display backlight control at 100% */
+ pwmRunning = FALSE;
+ palSetPad(IOPORT2, PIOB_LCD_BL);
}
/**
@@ -113,10 +145,28 @@ static inline void setpin_reset(bool_t state) { * @notapi
*/
static inline void set_backlight(uint8_t percent) {
- if (percent)
+ if (percent == 100) {
+ /* Turn the pin on - No PWM */
+ if (pwmRunning) {
+ pwmStop(&PWMD2);
+ pwmRunning = FALSE;
+ }
palSetPad(IOPORT2, PIOB_LCD_BL);
- else
+ } 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));
+ }
}
/**
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