| /****************************************************************************** |
| * |
| * Copyright (C) 2002 - 2015 Xilinx, Inc. All rights reserved. |
| * |
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| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * Use of the Software is limited solely to applications: |
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| * |
| ******************************************************************************/ |
| /*****************************************************************************/ |
| /** |
| * @file xgpio_extra.c |
| * @addtogroup gpio_v4_1 |
| * @{ |
| * |
| * The implementation of the XGpio driver's advanced discrete functions. |
| * See xgpio.h for more information about the driver. |
| * |
| * @note |
| * |
| * These APIs can only be used if the GPIO_IO ports in the IP are used for |
| * connecting to the external output ports. |
| * |
| * |
| * <pre> |
| * MODIFICATION HISTORY: |
| * |
| * Ver Who Date Changes |
| * ----- ---- -------- ----------------------------------------------- |
| * 1.00a rmm 02/04/02 First release |
| * 2.00a jhl 12/16/02 Update for dual channel and interrupt support |
| * 2.11a mta 03/21/07 Updated to new coding style |
| * 3.00a sv 11/21/09 Updated to use HAL Processor APIs. Renamed the macros |
| * XGpio_mWriteReg to XGpio_WriteReg, and XGpio_mReadReg |
| * to XGpio_ReadReg. |
| * </pre> |
| * |
| *****************************************************************************/ |
| |
| /***************************** Include Files ********************************/ |
| |
| #include "xgpio.h" |
| #include "xgpio_i.h" |
| |
| /************************** Constant Definitions ****************************/ |
| |
| /**************************** Type Definitions ******************************/ |
| |
| /***************** Macros (Inline Functions) Definitions ********************/ |
| |
| /************************** Variable Definitions ****************************/ |
| |
| /************************** Function Prototypes *****************************/ |
| |
| |
| /****************************************************************************/ |
| /** |
| * Set output discrete(s) to logic 1 for the specified GPIO channel. |
| * |
| * @param InstancePtr is a pointer to an XGpio instance to be worked on. |
| * @param Channel contains the channel of the GPIO (1 or 2) to operate on. |
| * @param Mask is the set of bits that will be set to 1 in the discrete |
| * data register. All other bits in the data register are |
| * unaffected. |
| * |
| * @return None. |
| * |
| * @note |
| * |
| * The hardware must be built for dual channels if this function is used |
| * with any channel other than 1. If it is not, this function will assert. |
| * |
| * This API can only be used if the GPIO_IO ports in the IP are used for |
| * connecting to the external output ports. |
| * |
| *****************************************************************************/ |
| void XGpio_DiscreteSet(XGpio * InstancePtr, unsigned Channel, u32 Mask) |
| { |
| u32 Current; |
| unsigned DataOffset; |
| |
| Xil_AssertVoid(InstancePtr != NULL); |
| Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY); |
| Xil_AssertVoid((Channel == 1) || |
| ((Channel == 2) && (InstancePtr->IsDual == TRUE))); |
| |
| /* Calculate the offset to the data register of the GPIO */ |
| DataOffset = ((Channel - 1) * XGPIO_CHAN_OFFSET) + XGPIO_DATA_OFFSET; |
| |
| /* |
| * Read the contents of the data register, merge in Mask and write |
| * back results |
| */ |
| Current = XGpio_ReadReg(InstancePtr->BaseAddress, DataOffset); |
| Current |= Mask; |
| XGpio_WriteReg(InstancePtr->BaseAddress, DataOffset, Current); |
| } |
| |
| |
| /****************************************************************************/ |
| /** |
| * Set output discrete(s) to logic 0 for the specified GPIO channel. |
| * |
| * @param InstancePtr is a pointer to an XGpio instance to be worked on. |
| * @param Channel contains the channel of the GPIO (1 or 2) to operate on. |
| * @param Mask is the set of bits that will be set to 0 in the discrete |
| * data register. All other bits in the data register are |
| * unaffected. |
| * |
| * @return None. |
| * |
| * @note |
| * |
| * The hardware must be built for dual channels if this function is used |
| * with any channel other than 1. If it is not, this function will assert. |
| * |
| * This API can only be used if the GPIO_IO ports in the IP are used for |
| * connecting to the external output ports. |
| * |
| *****************************************************************************/ |
| void XGpio_DiscreteClear(XGpio * InstancePtr, unsigned Channel, u32 Mask) |
| { |
| u32 Current; |
| unsigned DataOffset; |
| |
| Xil_AssertVoid(InstancePtr != NULL); |
| Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY); |
| Xil_AssertVoid((Channel == 1) || |
| ((Channel == 2) && (InstancePtr->IsDual == TRUE))); |
| |
| /* Calculate the offset to the data register of the GPIO */ |
| DataOffset = ((Channel - 1) * XGPIO_CHAN_OFFSET) + XGPIO_DATA_OFFSET; |
| |
| /* |
| * Read the contents of the data register, merge in Mask and write |
| * back results |
| */ |
| Current = XGpio_ReadReg(InstancePtr->BaseAddress, DataOffset); |
| Current &= ~Mask; |
| XGpio_WriteReg(InstancePtr->BaseAddress, DataOffset, Current); |
| } |
| /** @} */ |