diff options
Diffstat (limited to 'include/touchpad_lld.h')
| -rw-r--r-- | include/touchpad_lld.h | 65 |
1 files changed, 50 insertions, 15 deletions
diff --git a/include/touchpad_lld.h b/include/touchpad_lld.h index 45a561d3..a3a7489c 100644 --- a/include/touchpad_lld.h +++ b/include/touchpad_lld.h @@ -49,41 +49,76 @@ #define TOUCHPAD_HAS_PRESSURE FALSE #endif +#ifndef TOUCHPAD_SPI_PROLOGUE + #define TOUCHPAD_SPI_PROLOGUE() +#endif + +#ifndef TOUCHPAD_SPI_EPILOGUE + #define TOUCHPAD_SPI_EPILOGUE() +#endif + /*===========================================================================*/ /* Driver types. */ /*===========================================================================*/ -typedef struct TOUCHPADDriver TOUCHPADDriver; +typedef struct _TOUCHPADDriver TOUCHPADDriver; /** * @brief Structure representing a Touchpad driver. */ -struct TOUCHPADDriver { - /* - * @brief Pointer to SPI driver. - */ - SPIDriver *spid; - - /* - * @brief SPI configuration. - */ - SPIConfig *spicfg; +struct _TOUCHPADDriver { + /* + * @brief Pointer to SPI driver. + * @note SPI driver must be enabled in mcuconf.h and halconf.h + */ + SPIDriver *spip; + + /* + * @brief Pointer to the SPI configuration structure. + * @note The lowest possible speed ~ 1-2MHz is to be used, otherwise + * will result in a lot of noise + */ + const SPIConfig *spicfg; + + /* + * @brief Touchscreen controller TPIRQ pin GPIO port + */ + ioportid_t tpIRQPort; + + /* + * @brief Touchscreen controller TPIRQ GPIO pin + * @note The interface is polled as of now, interrupt support is + * to be implemented in the future. + */ + ioportmask_t tpIRQPin; + + /* + * @brief Initialize the SPI with the configuration struct given or not + * If TRUE, spiStart is called by the init, otherwise not + * @note This is provided in such a case when SPI port is being shared + * across multiple peripherals, so not to disturb the SPI bus. + * You can use TOUCHPAD_SPI_PROLOGUE() and TOUCHPAD_SPI_EPILOGUE() + * macros to change the SPI configuration or speed before and + * after using the touchpad. An example case would be sharing the + * bus with a fast flash memory chip. + */ + bool_t direct_init; }; + /*===========================================================================*/ /* External declarations. */ /*===========================================================================*/ -#if !defined(__DOXYGEN__) - extern TOUCHPADDriver Touchpad; -#endif #ifdef __cplusplus extern "C" { #endif /* Core functions */ - void tp_lld_init(TOUCHPADDriver *tp); + void tp_lld_init(const TOUCHPADDriver *tp); + + uint16_t tp_lld_read_value(uint8_t cmd); uint16_t tp_lld_read_x(void); uint16_t tp_lld_read_y(void); |