76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file boards/addons/ginput/touch/ADS7843/ginput_lld_mouse_board_st_stm32f4_discovery.h
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* @brief GINPUT Touch low level driver source for the ADS7843 on an st_stm32f4_discovery.
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*
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* @note This file contains a mix of hardware specific and operating system specific
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* code. You will need to change it for your CPU and/or operating system.
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*/
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#ifndef _GINPUT_LLD_MOUSE_BOARD_H
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#define _GINPUT_LLD_MOUSE_BOARD_H
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/*
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* uGFX port used: ChibiOS/RT
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*
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* SCK: GPIOB, 13
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* MISO: GPIOB, 14
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* MOSI: GPIOB, 15
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* CS: GPIOC, 4
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* IRC: GPIOC, 5
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*
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* Note that you can tweak the SPI bus speed
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*/
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static const SPIConfig spicfg = {
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0,
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GPIOC,
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4,
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/* SPI_CR1_BR_2 |*/ SPI_CR1_BR_1 | SPI_CR1_BR_0,
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};
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static inline void init_board(void) {
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palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(5) ); /* SCK */
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palSetPadMode(GPIOB, 14, PAL_MODE_ALTERNATE(5) ); /* MISO */
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palSetPadMode(GPIOB, 15, PAL_MODE_ALTERNATE(5) ); /* MOSI */
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palSetPadMode(GPIOC, 4, PAL_MODE_OUTPUT_PUSHPULL); /* CS */
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spiStart(&SPID2, &spicfg);
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}
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static inline bool_t getpin_pressed(void) {
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return (!palReadPad(GPIOC, 5));
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}
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static inline void aquire_bus(void) {
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spiAcquireBus(&SPID2);
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palClearPad(GPIOC, 4);
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}
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static inline void release_bus(void) {
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palSetPad(GPIOC, 4);
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spiReleaseBus(&SPID2);
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}
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static inline uint16_t read_value(uint16_t port) {
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static uint8_t txbuf[3] = {0};
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static uint8_t rxbuf[3] = {0};
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uint16_t ret;
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txbuf[0] = port;
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spiExchange(&SPID2, 3, txbuf, rxbuf);
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ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
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return ret;
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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