From 100d686f948050385ff29c8425a99db2aa0f0248 Mon Sep 17 00:00:00 2001 From: Joel Bodenmann Date: Sat, 2 Mar 2013 22:13:44 +0100 Subject: TDISP update --- .../HD44780/tdisp_lld_board_st_stm32f4_discovery.h | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h (limited to 'drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h') diff --git a/drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h b/drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h new file mode 100644 index 00000000..311d8d9f --- /dev/null +++ b/drivers/tdisp/HD44780/tdisp_lld_board_st_stm32f4_discovery.h @@ -0,0 +1,72 @@ +/* + ChibiOS/GFX - Copyright (C) 2012 + Joel Bodenmann aka Tectu + + This file is part of ChibiOS/GFX. + + ChibiOS/GFX is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/GFX is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file drivers/tdisp/HD44780/tdisp_lld_board_unknown.h + * @brief TDISP driver subsystem board interface for the HD44780 display + * + * @addtogroup TDISP + * @{ + */ + +#ifndef _TDISP_LLD_BOARD_H +#define _TDISP_LLD_BOARD_H + +/* Configure these to match the hardware connections on your board */ +#define BUS_4BITS FALSE +#define PORT_DATA GPIOG +#define PORT_CTRL GPIOE +#define PIN_RS 0 +#define PIN_RW 1 +#define PIN_EN 2 + +static void init_board(void) { + palSetGroupMode(PORT_CTRL, PAL_WHOLE_PORT, 0, PAL_MODE_OUTPUT_PUSHPULL); + palSetGroupMode(PORT_DATA, PAL_WHOLE_PORT, 0, PAL_MODE_OUTPUT_PUSHPULL); + palClearPad(PORT_CTRL, PIN_RW); +} + +static void writeToLCD(uint8_t data) { + palWritePort(PORT_DATA, data); + palSetPad(PORT_CTRL, PIN_EN); + chThdSleepMicroseconds(1); + palClearPad(PORT_CTRL, PIN_EN); + chThdSleepMicroseconds(5); +} + +static void write_cmd(uint8_t data) { + palClearPad(PORT_CTRL, PIN_RS); + #if BUS_4BITS + writeToLCD(data>>4); + #endif + writeToLCD(data); +} + +static void write_data(uint8_t data) { + palSetPad(PORT_CTRL, PIN_RS); + #if BUS_4BITS + writeToLCD(data>>4); + #endif + writeToLCD(data); +} + +#endif /* _TDISP_LLD_BOARD_H */ +/** @} */ + -- cgit v1.2.3