Nirvana Jay
patch for F746 demo
Fork of
BSP_DISCO_F746NG
by 
ST
Diff: Components/stmpe811/stmpe811.c
- Revision:
- 1:e8fac4061a5b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Components/stmpe811/stmpe811.c Mon Nov 02 23:35:17 2015 +0000
@@ -0,0 +1,977 @@
+/**
+ ******************************************************************************
+ * @file stmpe811.c
+ * @author MCD Application Team
+ * @version V2.0.0
+ * @date 15-December-2014
+ * @brief This file provides a set of functions needed to manage the STMPE811
+ * IO Expander devices.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stmpe811.h"
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup Components
+ * @{
+ */
+
+/** @defgroup STMPE811
+ * @{
+ */
+
+/** @defgroup STMPE811_Private_Types_Definitions
+ * @{
+ */
+
+/** @defgroup STMPE811_Private_Defines
+ * @{
+ */
+#define STMPE811_MAX_INSTANCE 2
+/**
+ * @}
+ */
+
+/** @defgroup STMPE811_Private_Macros
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup STMPE811_Private_Variables
+ * @{
+ */
+
+/* Touch screen driver structure initialization */
+TS_DrvTypeDef stmpe811_ts_drv =
+{
+ stmpe811_Init,
+ stmpe811_ReadID,
+ stmpe811_Reset,
+ stmpe811_TS_Start,
+ stmpe811_TS_DetectTouch,
+ stmpe811_TS_GetXY,
+ stmpe811_TS_EnableIT,
+ stmpe811_TS_ClearIT,
+ stmpe811_TS_ITStatus,
+ stmpe811_TS_DisableIT,
+};
+
+/* IO driver structure initialization */
+IO_DrvTypeDef stmpe811_io_drv =
+{
+ stmpe811_Init,
+ stmpe811_ReadID,
+ stmpe811_Reset,
+ stmpe811_IO_Start,
+ stmpe811_IO_Config,
+ stmpe811_IO_WritePin,
+ stmpe811_IO_ReadPin,
+ stmpe811_IO_EnableIT,
+ stmpe811_IO_DisableIT,
+ stmpe811_IO_ITStatus,
+ stmpe811_IO_ClearIT,
+};
+
+/* stmpe811 instances by address */
+uint8_t stmpe811[STMPE811_MAX_INSTANCE] = {0};
+/**
+ * @}
+ */
+
+/** @defgroup STMPE811_Private_Function_Prototypes
+ * @{
+ */
+static uint8_t stmpe811_GetInstance(uint16_t DeviceAddr);
+/**
+ * @}
+ */
+
+/** @defgroup STMPE811_Private_Functions
+ * @{
+ */
+
+/**
+ * @brief Initialize the stmpe811 and configure the needed hardware resources
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_Init(uint16_t DeviceAddr)
+{
+ uint8_t instance;
+ uint8_t empty;
+
+ /* Check if device instance already exists */
+ instance = stmpe811_GetInstance(DeviceAddr);
+
+ /* To prevent double initialization */
+ if(instance == 0xFF)
+ {
+ /* Look for empty instance */
+ empty = stmpe811_GetInstance(0);
+
+ if(empty < STMPE811_MAX_INSTANCE)
+ {
+ /* Register the current device instance */
+ stmpe811[empty] = DeviceAddr;
+
+ /* Initialize IO BUS layer */
+ IOE_Init();
+
+ /* Generate stmpe811 Software reset */
+ stmpe811_Reset(DeviceAddr);
+ }
+ }
+}
+
+/**
+ * @brief Reset the stmpe811 by Software.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_Reset(uint16_t DeviceAddr)
+{
+ /* Power Down the stmpe811 */
+ IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL1, 2);
+
+ /* Wait for a delay to ensure registers erasing */
+ IOE_Delay(10);
+
+ /* Power On the Codec after the power off => all registers are reinitialized */
+ IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL1, 0);
+
+ /* Wait for a delay to ensure registers erasing */
+ IOE_Delay(2);
+}
+
+/**
+ * @brief Read the stmpe811 IO Expander device ID.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval The Device ID (two bytes).
+ */
+uint16_t stmpe811_ReadID(uint16_t DeviceAddr)
+{
+ /* Initialize IO BUS layer */
+ IOE_Init();
+
+ /* Return the device ID value */
+ return ((IOE_Read(DeviceAddr, STMPE811_REG_CHP_ID_LSB) << 8) |\
+ (IOE_Read(DeviceAddr, STMPE811_REG_CHP_ID_MSB)));
+}
+
+/**
+ * @brief Enable the Global interrupt.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_EnableGlobalIT(uint16_t DeviceAddr)
+{
+ uint8_t tmp = 0;
+
+ /* Read the Interrupt Control register */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
+
+ /* Set the global interrupts to be Enabled */
+ tmp |= (uint8_t)STMPE811_GIT_EN;
+
+ /* Write Back the Interrupt Control register */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
+}
+
+/**
+ * @brief Disable the Global interrupt.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_DisableGlobalIT(uint16_t DeviceAddr)
+{
+ uint8_t tmp = 0;
+
+ /* Read the Interrupt Control register */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
+
+ /* Set the global interrupts to be Disabled */
+ tmp &= ~(uint8_t)STMPE811_GIT_EN;
+
+ /* Write Back the Interrupt Control register */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
+
+}
+
+/**
+ * @brief Enable the interrupt mode for the selected IT source
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Source: The interrupt source to be configured, could be:
+ * @arg STMPE811_GIT_IO: IO interrupt
+ * @arg STMPE811_GIT_ADC : ADC interrupt
+ * @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
+ * @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
+ * @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
+ * @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
+ * @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
+ * @retval None
+ */
+void stmpe811_EnableITSource(uint16_t DeviceAddr, uint8_t Source)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current value of the INT_EN register */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_EN);
+
+ /* Set the interrupts to be Enabled */
+ tmp |= Source;
+
+ /* Set the register */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_EN, tmp);
+}
+
+/**
+ * @brief Disable the interrupt mode for the selected IT source
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Source: The interrupt source to be configured, could be:
+ * @arg STMPE811_GIT_IO: IO interrupt
+ * @arg STMPE811_GIT_ADC : ADC interrupt
+ * @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
+ * @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
+ * @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
+ * @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
+ * @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
+ * @retval None
+ */
+void stmpe811_DisableITSource(uint16_t DeviceAddr, uint8_t Source)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current value of the INT_EN register */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_EN);
+
+ /* Set the interrupts to be Enabled */
+ tmp &= ~Source;
+
+ /* Set the register */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_EN, tmp);
+}
+
+/**
+ * @brief Set the global interrupt Polarity.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Polarity: the IT mode polarity, could be one of the following values:
+ * @arg STMPE811_POLARITY_LOW: Interrupt line is active Low/Falling edge
+ * @arg STMPE811_POLARITY_HIGH: Interrupt line is active High/Rising edge
+ * @retval None
+ */
+void stmpe811_SetITPolarity(uint16_t DeviceAddr, uint8_t Polarity)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current register value */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
+
+ /* Mask the polarity bits */
+ tmp &= ~(uint8_t)0x04;
+
+ /* Modify the Interrupt Output line configuration */
+ tmp |= Polarity;
+
+ /* Set the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
+
+}
+
+/**
+ * @brief Set the global interrupt Type.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Type: Interrupt line activity type, could be one of the following values:
+ * @arg STMPE811_TYPE_LEVEL: Interrupt line is active in level model
+ * @arg STMPE811_TYPE_EDGE: Interrupt line is active in edge model
+ * @retval None
+ */
+void stmpe811_SetITType(uint16_t DeviceAddr, uint8_t Type)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current register value */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
+
+ /* Mask the type bits */
+ tmp &= ~(uint8_t)0x02;
+
+ /* Modify the Interrupt Output line configuration */
+ tmp |= Type;
+
+ /* Set the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
+
+}
+
+/**
+ * @brief Check the selected Global interrupt source pending bit
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Source: the Global interrupt source to be checked, could be:
+ * @arg STMPE811_GIT_IO: IO interrupt
+ * @arg STMPE811_GIT_ADC : ADC interrupt
+ * @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
+ * @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
+ * @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
+ * @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
+ * @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
+ * @retval The checked Global interrupt source status.
+ */
+uint8_t stmpe811_GlobalITStatus(uint16_t DeviceAddr, uint8_t Source)
+{
+ /* Return the global IT source status */
+ return((IOE_Read(DeviceAddr, STMPE811_REG_INT_STA) & Source) == Source);
+}
+
+/**
+ * @brief Return the Global interrupts status
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Source: the Global interrupt source to be checked, could be:
+ * @arg STMPE811_GIT_IO: IO interrupt
+ * @arg STMPE811_GIT_ADC : ADC interrupt
+ * @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
+ * @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
+ * @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
+ * @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
+ * @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
+ * @retval The checked Global interrupt source status.
+ */
+uint8_t stmpe811_ReadGITStatus(uint16_t DeviceAddr, uint8_t Source)
+{
+ /* Return the global IT source status */
+ return((IOE_Read(DeviceAddr, STMPE811_REG_INT_STA) & Source));
+}
+
+/**
+ * @brief Clear the selected Global interrupt pending bit(s)
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param Source: the Global interrupt source to be cleared, could be any combination
+ * of the following values:
+ * @arg STMPE811_GIT_IO: IO interrupt
+ * @arg STMPE811_GIT_ADC : ADC interrupt
+ * @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
+ * @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
+ * @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
+ * @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
+ * @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
+ * @retval None
+ */
+void stmpe811_ClearGlobalIT(uint16_t DeviceAddr, uint8_t Source)
+{
+ /* Write 1 to the bits that have to be cleared */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_STA, Source);
+}
+
+/**
+ * @brief Start the IO functionality use and disable the AF for selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO pin(s) to put in AF. This parameter can be one
+ * of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_Start(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ uint8_t mode;
+
+ /* Get the current register value */
+ mode = IOE_Read(DeviceAddr, STMPE811_REG_SYS_CTRL2);
+
+ /* Set the Functionalities to be Disabled */
+ mode &= ~(STMPE811_IO_FCT | STMPE811_ADC_FCT);
+
+ /* Write the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
+
+ /* Disable AF for the selected IO pin(s) */
+ stmpe811_IO_DisableAF(DeviceAddr, (uint8_t)IO_Pin);
+}
+
+/**
+ * @brief Configures the IO pin(s) according to IO mode structure value.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The output pin to be set or reset. This parameter can be one
+ * of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @param IO_Mode: The IO pin mode to configure, could be one of the following values:
+ * @arg IO_MODE_INPUT
+ * @arg IO_MODE_OUTPUT
+ * @arg IO_MODE_IT_RISING_EDGE
+ * @arg IO_MODE_IT_FALLING_EDGE
+ * @arg IO_MODE_IT_LOW_LEVEL
+ * @arg IO_MODE_IT_HIGH_LEVEL
+ * @retval 0 if no error, IO_Mode if error
+ */
+uint8_t stmpe811_IO_Config(uint16_t DeviceAddr, uint32_t IO_Pin, IO_ModeTypedef IO_Mode)
+{
+ uint8_t error_code = 0;
+
+ /* Configure IO pin according to selected IO mode */
+ switch(IO_Mode)
+ {
+ case IO_MODE_INPUT: /* Input mode */
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
+ break;
+
+ case IO_MODE_OUTPUT: /* Output mode */
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_OUT);
+ break;
+
+ case IO_MODE_IT_RISING_EDGE: /* Interrupt rising edge mode */
+ stmpe811_IO_EnableIT(DeviceAddr);
+ stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
+ stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_EDGE);
+ stmpe811_IO_SetEdgeMode(DeviceAddr, IO_Pin, STMPE811_EDGE_RISING);
+ break;
+
+ case IO_MODE_IT_FALLING_EDGE: /* Interrupt falling edge mode */
+ stmpe811_IO_EnableIT(DeviceAddr);
+ stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
+ stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_EDGE);
+ stmpe811_IO_SetEdgeMode(DeviceAddr, IO_Pin, STMPE811_EDGE_FALLING);
+ break;
+
+ case IO_MODE_IT_LOW_LEVEL: /* Low level interrupt mode */
+ stmpe811_IO_EnableIT(DeviceAddr);
+ stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
+ stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_LEVEL);
+ stmpe811_SetITPolarity(DeviceAddr, STMPE811_POLARITY_LOW);
+ break;
+
+ case IO_MODE_IT_HIGH_LEVEL: /* High level interrupt mode */
+ stmpe811_IO_EnableIT(DeviceAddr);
+ stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
+ stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
+ stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_LEVEL);
+ stmpe811_SetITPolarity(DeviceAddr, STMPE811_POLARITY_HIGH);
+ break;
+
+ default:
+ error_code = (uint8_t) IO_Mode;
+ break;
+ }
+ return error_code;
+}
+
+/**
+ * @brief Initialize the selected IO pin direction.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO pin to be configured. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: Where x can be from 0 to 7.
+ * @param Direction: could be STMPE811_DIRECTION_IN or STMPE811_DIRECTION_OUT.
+ * @retval None
+ */
+void stmpe811_IO_InitPin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t Direction)
+{
+ uint8_t tmp = 0;
+
+ /* Get all the Pins direction */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_DIR);
+
+ /* Set the selected pin direction */
+ if (Direction != STMPE811_DIRECTION_IN)
+ {
+ tmp |= (uint8_t)IO_Pin;
+ }
+ else
+ {
+ tmp &= ~(uint8_t)IO_Pin;
+ }
+
+ /* Write the register new value */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_DIR, tmp);
+}
+
+/**
+ * @brief Disable the AF for the selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO pin to be configured. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: Where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_DisableAF(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current state of the IO_AF register */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_AF);
+
+ /* Enable the selected pins alternate function */
+ tmp |= (uint8_t)IO_Pin;
+
+ /* Write back the new value in IO AF register */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_AF, tmp);
+
+}
+
+/**
+ * @brief Enable the AF for the selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO pin to be configured. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: Where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_EnableAF(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ uint8_t tmp = 0;
+
+ /* Get the current register value */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_AF);
+
+ /* Enable the selected pins alternate function */
+ tmp &= ~(uint8_t)IO_Pin;
+
+ /* Write back the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_AF, tmp);
+}
+
+/**
+ * @brief Configure the Edge for which a transition is detectable for the
+ * selected pin.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO pin to be configured. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: Where x can be from 0 to 7.
+ * @param Edge: The edge which will be detected. This parameter can be one or
+ * a combination of following values: STMPE811_EDGE_FALLING and STMPE811_EDGE_RISING .
+ * @retval None
+ */
+void stmpe811_IO_SetEdgeMode(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t Edge)
+{
+ uint8_t tmp1 = 0, tmp2 = 0;
+
+ /* Get the current registers values */
+ tmp1 = IOE_Read(DeviceAddr, STMPE811_REG_IO_FE);
+ tmp2 = IOE_Read(DeviceAddr, STMPE811_REG_IO_RE);
+
+ /* Disable the Falling Edge */
+ tmp1 &= ~(uint8_t)IO_Pin;
+
+ /* Disable the Falling Edge */
+ tmp2 &= ~(uint8_t)IO_Pin;
+
+ /* Enable the Falling edge if selected */
+ if (Edge & STMPE811_EDGE_FALLING)
+ {
+ tmp1 |= (uint8_t)IO_Pin;
+ }
+
+ /* Enable the Rising edge if selected */
+ if (Edge & STMPE811_EDGE_RISING)
+ {
+ tmp2 |= (uint8_t)IO_Pin;
+ }
+
+ /* Write back the new registers values */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_FE, tmp1);
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_RE, tmp2);
+}
+
+/**
+ * @brief Write a new IO pin state.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The output pin to be set or reset. This parameter can be one
+ * of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @param PinState: The new IO pin state.
+ * @retval None
+ */
+void stmpe811_IO_WritePin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t PinState)
+{
+ /* Apply the bit value to the selected pin */
+ if (PinState != 0)
+ {
+ /* Set the register */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_SET_PIN, (uint8_t)IO_Pin);
+ }
+ else
+ {
+ /* Set the register */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_CLR_PIN, (uint8_t)IO_Pin);
+ }
+}
+
+/**
+ * @brief Return the state of the selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The output pin to be set or reset. This parameter can be one
+ * of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @retval IO pin(s) state.
+ */
+uint32_t stmpe811_IO_ReadPin(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ return((uint32_t)(IOE_Read(DeviceAddr, STMPE811_REG_IO_MP_STA) & (uint8_t)IO_Pin));
+}
+
+/**
+ * @brief Enable the global IO interrupt source.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_IO_EnableIT(uint16_t DeviceAddr)
+{
+ IOE_ITConfig();
+
+ /* Enable global IO IT source */
+ stmpe811_EnableITSource(DeviceAddr, STMPE811_GIT_IO);
+
+ /* Enable global interrupt */
+ stmpe811_EnableGlobalIT(DeviceAddr);
+}
+
+/**
+ * @brief Disable the global IO interrupt source.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_IO_DisableIT(uint16_t DeviceAddr)
+{
+ /* Disable the global interrupt */
+ stmpe811_DisableGlobalIT(DeviceAddr);
+
+ /* Disable global IO IT source */
+ stmpe811_DisableITSource(DeviceAddr, STMPE811_GIT_IO);
+}
+
+/**
+ * @brief Enable interrupt mode for the selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO interrupt to be enabled. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_EnablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ uint8_t tmp = 0;
+
+ /* Get the IO interrupt state */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_EN);
+
+ /* Set the interrupts to be enabled */
+ tmp |= (uint8_t)IO_Pin;
+
+ /* Write the register new value */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_EN, tmp);
+}
+
+/**
+ * @brief Disable interrupt mode for the selected IO pin(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO interrupt to be disabled. This parameter could be any
+ * combination of the following values:
+ * @arg STMPE811_PIN_x: where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_DisablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ uint8_t tmp = 0;
+
+ /* Get the IO interrupt state */
+ tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_EN);
+
+ /* Set the interrupts to be Disabled */
+ tmp &= ~(uint8_t)IO_Pin;
+
+ /* Write the register new value */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_EN, tmp);
+}
+
+/**
+ * @brief Check the status of the selected IO interrupt pending bit
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: The IO interrupt to be checked could be:
+ * @arg STMPE811_PIN_x Where x can be from 0 to 7.
+ * @retval Status of the checked IO pin(s).
+ */
+uint32_t stmpe811_IO_ITStatus(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ /* Get the Interrupt status */
+ return(IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_STA) & (uint8_t)IO_Pin);
+}
+
+/**
+ * @brief Clear the selected IO interrupt pending bit(s).
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param IO_Pin: the IO interrupt to be cleared, could be:
+ * @arg STMPE811_PIN_x: Where x can be from 0 to 7.
+ * @retval None
+ */
+void stmpe811_IO_ClearIT(uint16_t DeviceAddr, uint32_t IO_Pin)
+{
+ /* Clear the global IO IT pending bit */
+ stmpe811_ClearGlobalIT(DeviceAddr, STMPE811_GIT_IO);
+
+ /* Clear the IO IT pending bit(s) */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_STA, (uint8_t)IO_Pin);
+
+ /* Clear the Edge detection pending bit*/
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_ED, (uint8_t)IO_Pin);
+
+ /* Clear the Rising edge pending bit */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_RE, (uint8_t)IO_Pin);
+
+ /* Clear the Falling edge pending bit */
+ IOE_Write(DeviceAddr, STMPE811_REG_IO_FE, (uint8_t)IO_Pin);
+}
+
+/**
+ * @brief Configures the touch Screen Controller (Single point detection)
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None.
+ */
+void stmpe811_TS_Start(uint16_t DeviceAddr)
+{
+ uint8_t mode;
+
+ /* Get the current register value */
+ mode = IOE_Read(DeviceAddr, STMPE811_REG_SYS_CTRL2);
+
+ /* Set the Functionalities to be Enabled */
+ mode &= ~(STMPE811_IO_FCT);
+
+ /* Write the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
+
+ /* Select TSC pins in TSC alternate mode */
+ stmpe811_IO_EnableAF(DeviceAddr, STMPE811_TOUCH_IO_ALL);
+
+ /* Set the Functionalities to be Enabled */
+ mode &= ~(STMPE811_TS_FCT | STMPE811_ADC_FCT);
+
+ /* Set the new register value */
+ IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
+
+ /* Select Sample Time, bit number and ADC Reference */
+ IOE_Write(DeviceAddr, STMPE811_REG_ADC_CTRL1, 0x49);
+
+ /* Wait for 2 ms */
+ IOE_Delay(2);
+
+ /* Select the ADC clock speed: 3.25 MHz */
+ IOE_Write(DeviceAddr, STMPE811_REG_ADC_CTRL2, 0x01);
+
+ /* Select 2 nF filter capacitor */
+ /* Configuration:
+ - Touch average control : 4 samples
+ - Touch delay time : 500 uS
+ - Panel driver setting time: 500 uS
+ */
+ IOE_Write(DeviceAddr, STMPE811_REG_TSC_CFG, 0x9A);
+
+ /* Configure the Touch FIFO threshold: single point reading */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_TH, 0x01);
+
+ /* Clear the FIFO memory content. */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
+
+ /* Put the FIFO back into operation mode */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
+
+ /* Set the range and accuracy pf the pressure measurement (Z) :
+ - Fractional part :7
+ - Whole part :1
+ */
+ IOE_Write(DeviceAddr, STMPE811_REG_TSC_FRACT_XYZ, 0x01);
+
+ /* Set the driving capability (limit) of the device for TSC pins: 50mA */
+ IOE_Write(DeviceAddr, STMPE811_REG_TSC_I_DRIVE, 0x01);
+
+ /* Touch screen control configuration (enable TSC):
+ - No window tracking index
+ - XYZ acquisition mode
+ */
+ IOE_Write(DeviceAddr, STMPE811_REG_TSC_CTRL, 0x01);
+
+ /* Clear all the status pending bits if any */
+ IOE_Write(DeviceAddr, STMPE811_REG_INT_STA, 0xFF);
+
+ /* Wait for 2 ms delay */
+ IOE_Delay(2);
+}
+
+/**
+ * @brief Return if there is touch detected or not.
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval Touch detected state.
+ */
+uint8_t stmpe811_TS_DetectTouch(uint16_t DeviceAddr)
+{
+ uint8_t state;
+ uint8_t ret = 0;
+
+ state = ((IOE_Read(DeviceAddr, STMPE811_REG_TSC_CTRL) & (uint8_t)STMPE811_TS_CTRL_STATUS) == (uint8_t)0x80);
+
+ if(state > 0)
+ {
+ if(IOE_Read(DeviceAddr, STMPE811_REG_FIFO_SIZE) > 0)
+ {
+ ret = 1;
+ }
+ }
+ else
+ {
+ /* Reset FIFO */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
+ /* Enable the FIFO again */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Get the touch screen X and Y positions values
+ * @param DeviceAddr: Device address on communication Bus.
+ * @param X: Pointer to X position value
+ * @param Y: Pointer to Y position value
+ * @retval None.
+ */
+void stmpe811_TS_GetXY(uint16_t DeviceAddr, uint16_t *X, uint16_t *Y)
+{
+ uint8_t dataXYZ[4];
+ uint32_t uldataXYZ;
+
+ IOE_ReadMultiple(DeviceAddr, STMPE811_REG_TSC_DATA_NON_INC, dataXYZ, sizeof(dataXYZ)) ;
+
+ /* Calculate positions values */
+ uldataXYZ = (dataXYZ[0] << 24)|(dataXYZ[1] << 16)|(dataXYZ[2] << 8)|(dataXYZ[3] << 0);
+ *X = (uldataXYZ >> 20) & 0x00000FFF;
+ *Y = (uldataXYZ >> 8) & 0x00000FFF;
+
+ /* Reset FIFO */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
+ /* Enable the FIFO again */
+ IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
+}
+
+/**
+ * @brief Configure the selected source to generate a global interrupt or not
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_TS_EnableIT(uint16_t DeviceAddr)
+{
+ IOE_ITConfig();
+
+ /* Enable global TS IT source */
+ stmpe811_EnableITSource(DeviceAddr, STMPE811_TS_IT);
+
+ /* Enable global interrupt */
+ stmpe811_EnableGlobalIT(DeviceAddr);
+}
+
+/**
+ * @brief Configure the selected source to generate a global interrupt or not
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_TS_DisableIT(uint16_t DeviceAddr)
+{
+ /* Disable global interrupt */
+ stmpe811_DisableGlobalIT(DeviceAddr);
+
+ /* Disable global TS IT source */
+ stmpe811_DisableITSource(DeviceAddr, STMPE811_TS_IT);
+}
+
+/**
+ * @brief Configure the selected source to generate a global interrupt or not
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval TS interrupts status
+ */
+uint8_t stmpe811_TS_ITStatus(uint16_t DeviceAddr)
+{
+ /* Return TS interrupts status */
+ return(stmpe811_ReadGITStatus(DeviceAddr, STMPE811_TS_IT));
+}
+
+/**
+ * @brief Configure the selected source to generate a global interrupt or not
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval None
+ */
+void stmpe811_TS_ClearIT(uint16_t DeviceAddr)
+{
+ /* Clear the global TS IT source */
+ stmpe811_ClearGlobalIT(DeviceAddr, STMPE811_TS_IT);
+}
+
+/**
+ * @brief Check if the device instance of the selected address is already registered
+ * and return its index
+ * @param DeviceAddr: Device address on communication Bus.
+ * @retval Index of the device instance if registered, 0xFF if not.
+ */
+static uint8_t stmpe811_GetInstance(uint16_t DeviceAddr)
+{
+ uint8_t idx = 0;
+
+ /* Check all the registered instances */
+ for(idx = 0; idx < STMPE811_MAX_INSTANCE ; idx ++)
+ {
+ if(stmpe811[idx] == DeviceAddr)
+ {
+ return idx;
+ }
+ }
+
+ return 0xFF;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/