127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/*
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* This file is subject to the terms of the GFX License, v1.0. 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://chibios-gfx.com/license.html
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*/
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/**
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* @file drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
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* @brief GINPUT Touch low level driver source for the STMPE811 on the Embest DM-STF4BB board.
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*
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* @defgroup Mouse Mouse
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* @ingroup GINPUT
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* @{
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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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static const I2CConfig i2ccfg = {
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OPMODE_I2C,
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400000,
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FAST_DUTY_CYCLE_2,
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};
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/**
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* @brief Initialise the board for the touch.
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*
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* @notapi
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*/
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static void init_board(void)
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{
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palSetPadMode(GPIOC, 13, PAL_MODE_INPUT | PAL_STM32_PUDR_FLOATING); /* TP IRQ */
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palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SCL */
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palSetPadMode(GPIOB, 9, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SDA */
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i2cStart(&I2CD1, &i2ccfg);
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}
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/**
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* @brief Check whether an interrupt is raised
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* @return TRUE if there is an interrupt signal present
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*
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* @notapi
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*/
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static inline bool_t getpin_irq(void) {
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return (!(palReadPad(GPIOC, 13)));
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}
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/**
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* @brief Write a value into a certain register
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*
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* @param[in] reg The register address
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* @param[in] n The amount of bytes (one or two)
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* @param[in] val The value
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*
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* @notapi
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*/
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static void write_reg(uint8_t reg, uint8_t n, uint16_t val)
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{
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uint8_t txbuf[3];
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i2cAcquireBus(&I2CD1);
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txbuf[0] = reg;
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if (n == 1) {
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txbuf[1] = val;
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i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 2, NULL, 0, MS2ST(STMPE811_TIMEOUT));
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} else if (n == 2) {
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txbuf[1] = ((val & 0xFF00) >> 8);
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txbuf[2] = (val & 0x00FF);
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i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 3, NULL, 0, MS2ST(STMPE811_TIMEOUT));
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}
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i2cReleaseBus(&I2CD1);
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}
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/**
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* @brief Read the value of a certain register
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*
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* @param[in] reg The register address
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* @param[in] n The amount of bytes (one or two)
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*
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* @return Data read from device (one byte or two depending on n param)
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*
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* @notapi
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*/
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static uint16_t read_reg(uint8_t reg, uint8_t n)
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{
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uint8_t txbuf[1], rxbuf[2];
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uint16_t ret;
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rxbuf[0] = 0;
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rxbuf[1] = 0;
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i2cAcquireBus(&I2CD1);
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txbuf[0] = reg;
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i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, rxbuf, n, MS2ST(STMPE811_TIMEOUT));
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if (n == 1) {
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ret = rxbuf[0];
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} else if (n == 2) {
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ret = ((rxbuf[0] << 8) | (rxbuf[1] & 0xFF));
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}
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i2cReleaseBus(&I2CD1);
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return ret;
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}
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static void read_reg_n(uint8_t reg, uint8_t n, uint8_t *rxbuf)
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{
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uint8_t txbuf[1];
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i2cAcquireBus(&I2CD1);
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txbuf[0] = reg;
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i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, rxbuf, n, MS2ST(STMPE811_TIMEOUT));
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i2cReleaseBus(&I2CD1);
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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/** @} */
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