From 5bfa0f26220588359342d4bf14add6dc53b4788b Mon Sep 17 00:00:00 2001 From: Joel Bodenmann Date: Thu, 29 Nov 2012 01:21:36 +0100 Subject: [PATCH] ginput/touch/MCU Olimex STM32 LCD board file --- .../ginput_lld_mouse_board_olimex_stm32_lcd.h | 163 ++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h diff --git a/drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h b/drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h new file mode 100644 index 00000000..cde1ba77 --- /dev/null +++ b/drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h @@ -0,0 +1,163 @@ +/* + 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/ginput/touch/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h + * @brief GINPUT Touch low level driver source for the MCU on the example board. + * + * @addtogroup GINPUT_MOUSE + * @{ + */ + +#ifndef _GINPUT_LLD_MOUSE_BOARD_H +#define _GINPUT_LLD_MOUSE_BOARD_H + +#define ADC_NUM_CHANNELS 2 +#define ADC_BUF_DEPTH 1 + +static const ADCConversionGroup adc_y_config = { + FALSE, + ADC_NUM_CHANNELS, + NULL, + NULL, + 0, 0, + 0, 0, + ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS), + 0, + ADC_SQR3_SQ2_N(ADC_CHANNEL_IN12) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN13) +}; + +static const ADCConversionGroup adc_x_config = { + FALSE, + ADC_NUM_CHANNELS, + NULL, + NULL, + 0, 0, + 0, 0, + ADC_SQR1_NUM_CH(ADC_NUM_CHANNELS), + 0, + ADC_SQR3_SQ2_N(ADC_CHANNEL_IN10) | ADC_SQR3_SQ1_N(ADC_CHANNEL_IN11) +}; + +/** + * @brief Initialise the board for the touch. + * + * @notapi + */ +static __inline void init_board(void) { + adcStart(&ADCD1, NULL); +} + +/** + * @brief Check whether the surface is currently touched + * @return TRUE if the surface is currently touched + * + * @notapi + */ +static __inline bool_t getpin_pressed(void) { + palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_PULLDOWN); + palSetPadMode(GPIOC, 1, PAL_MODE_INPUT); + palSetPadMode(GPIOC, 2, PAL_MODE_INPUT); + palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL); + palSetPad(GPIOC, 3); + + return palReadPad(GPIOC, 0); +} + +/** + * @brief Aquire the bus ready for readings + * + * @notapi + */ +static __inline void aquire_bus(void) { + +} + +/** + * @brief Release the bus after readings + * + * @notapi + */ +static __inline void release_bus(void) { + +} + +/** + * @brief Read an x value from touch controller + * @return The value read from the controller + * + * @notapi + */ +static __inline uint16_t read_x_value(void) { + uint16_t val1, val2; + adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH]; + + palSetPadMode(GPIOC, 0, PAL_MODE_INPUT_ANALOG); + palSetPadMode(GPIOC, 1, PAL_MODE_INPUT_ANALOG); + palSetPadMode(GPIOC, 2, PAL_MODE_OUTPUT_PUSHPULL); + palSetPadMode(GPIOC, 3, PAL_MODE_OUTPUT_PUSHPULL); + + palSetPad(GPIOC, 2); + palClearPad(GPIOC, 3); + chThdSleepMilliseconds(1); + adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH); + val1 = ((samples[0] + samples[1])/2); + + palClearPad(GPIOC, 2); + palSetPad(GPIOC, 3); + chThdSleepMilliseconds(1); + adcConvert(&ADCD1, &adc_x_config, samples, ADC_BUF_DEPTH); + val2 = ((samples[0] + samples[1])/2); + + return ((val1+((1<<12)-val2))/4); +} + +/** + * @brief Read an y value from touch controller + * @return The value read from the controller + * + * @notapi + */ +static __inline uint16_t read_y_value(void) { + uint16_t val1, val2; + adcsample_t samples[ADC_NUM_CHANNELS * ADC_BUF_DEPTH]; + + palSetPadMode(GPIOC, 2, PAL_MODE_INPUT_ANALOG); + palSetPadMode(GPIOC, 3, PAL_MODE_INPUT_ANALOG); + palSetPadMode(GPIOC, 0, PAL_MODE_OUTPUT_PUSHPULL); + palSetPadMode(GPIOC, 1, PAL_MODE_OUTPUT_PUSHPULL); + + palSetPad(GPIOC, 1); + palClearPad(GPIOC, 0); + chThdSleepMilliseconds(1); + adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH); + val1 = ((samples[0] + samples[1])/2); + + palClearPad(GPIOC, 0); + palSetPad(GPIOC, 1); + chThdSleepMilliseconds(1); + adcConvert(&ADCD1, &adc_y_config, samples, ADC_BUF_DEPTH); + val2 = ((samples[0] + samples[1])/2); + + return ((val1+((1<<12)-val2))/4); +} + +#endif /* _GINPUT_LLD_MOUSE_BOARD_H */ +/** @} */