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// #################################################################################################
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// # << NEORV32: neorv32_slink.c - Stream Link Interface HW Driver >> #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # conditions and the following disclaimer. #
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// # #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
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// # conditions and the following disclaimer in the documentation and/or other materials #
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// # provided with the distribution. #
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// # #
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// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
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// # endorse or promote products derived from this software without specific prior written #
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// # permission. #
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// # #
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// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
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// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
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// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
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// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
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// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
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// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
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// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
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// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
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// # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// # ********************************************************************************************* #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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// #################################################################################################
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/**********************************************************************//**
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* @file neorv32_slink.h
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* @author Stephan Nolting
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* @brief Stream Link Interface HW driver source file.
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**************************************************************************/
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#include "neorv32.h"
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#include "neorv32_slink.h"
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/**********************************************************************//**
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* Check if stream link interface was synthesized.
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*
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* @return 0 if SLINK was not synthesized, 1 if SLINK is available.
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**************************************************************************/
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int neorv32_slink_available(void) {
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if (NEORV32_SYSINFO.SOC & (1 << SYSINFO_SOC_IO_SLINK)) {
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return 1;
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Activate stream link interface.
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**************************************************************************/
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void neorv32_slink_enable(void) {
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NEORV32_SLINK.CTRL |= (uint32_t)(1 << SLINK_CTRL_EN);
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}
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/**********************************************************************//**
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* Deactivate stream link interface.
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*
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* @note This will also clear all link FIFOs.
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**************************************************************************/
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void neorv32_slink_disable(void) {
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NEORV32_SLINK.CTRL &= ~(uint32_t)(1 << SLINK_CTRL_EN);
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}
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/**********************************************************************//**
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* Configure SLINK RX interrupt.
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*
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* @param[in] link_id Link id (0..7).
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* @param[in] irq_en Link's IRQ enable (#NEORV32_SLINK_IRQ_EN_enum)
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* @param[in] irq_type Link's IRQ type (#NEORV32_SLINK_IRQ_RX_TYPE_enum)
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**************************************************************************/
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void neorv32_slink_rx_irq_config(int link_id, int irq_en, int irq_type) {
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link_id = link_id & 7;
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uint32_t slink_irq_conf = NEORV32_SLINK.IRQ;
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// enable IRQ
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if (irq_en) {
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slink_irq_conf |= (1 << (SLINK_IRQ_RX_EN_LSB + link_id));
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}
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else {
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slink_irq_conf &= ~(1 << (SLINK_IRQ_RX_EN_LSB + link_id));
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}
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// configure type
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if (irq_type) {
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slink_irq_conf |= (1 << (SLINK_IRQ_RX_MODE_LSB + link_id));
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}
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else {
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slink_irq_conf &= ~(1 << (SLINK_IRQ_RX_MODE_LSB + link_id));
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}
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NEORV32_SLINK.IRQ = slink_irq_conf;
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}
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/**********************************************************************//**
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* Configure SLINK TX interrupt.
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*
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* @param[in] link_id Link id (0..7).
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* @param[in] irq_en Link's IRQ enable (#NEORV32_SLINK_IRQ_EN_enum)
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* @param[in] irq_type Link's IRQ type (#NEORV32_SLINK_IRQ_TX_TYPE_enum)
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**************************************************************************/
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void neorv32_slink_tx_irq_config(int link_id, int irq_en, int irq_type) {
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link_id = link_id & 7;
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uint32_t slink_irq_conf = NEORV32_SLINK.IRQ;
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// enable IRQ
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if (irq_en) {
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slink_irq_conf |= (1 << (SLINK_IRQ_TX_EN_LSB + link_id));
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}
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else {
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slink_irq_conf &= ~(1 << (SLINK_IRQ_TX_EN_LSB + link_id));
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}
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// configure type
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if (irq_type) {
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slink_irq_conf |= (1 << (SLINK_IRQ_TX_MODE_LSB + link_id));
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}
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else {
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slink_irq_conf &= ~(1 << (SLINK_IRQ_TX_MODE_LSB + link_id));
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}
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NEORV32_SLINK.IRQ = slink_irq_conf;
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}
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/**********************************************************************//**
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* Get number of implemented RX links
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*
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* @return Number of implemented RX link (0..8).
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**************************************************************************/
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int neorv32_slink_get_rx_num(void) {
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if (neorv32_slink_available()) {
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return (int)((NEORV32_SLINK.CTRL >> SLINK_CTRL_RX_NUM0) & 0xf);
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Get number of implemented TX links
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*
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* @return Number of implemented TX link (0..8).
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**************************************************************************/
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int neorv32_slink_get_tx_num(void) {
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if (neorv32_slink_available()) {
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return (int)((NEORV32_SLINK.CTRL >> SLINK_CTRL_TX_NUM0) & 0xf);
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Get FIFO depth of RX links
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*
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* @return FIFO depth of RX links (1..32768); 0 if no RX links implemented.
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**************************************************************************/
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int neorv32_slink_get_rx_depth(void) {
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if (neorv32_slink_available()) {
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uint32_t tmp = (NEORV32_SLINK.CTRL >> SLINK_CTRL_RX_FIFO_S0) & 0x0f;
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return (int)(1 << tmp);
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Get FIFO depth of TX links
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*
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* @return FIFO depth of TX links (1..32768); 0 if no TX links implemented.
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**************************************************************************/
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int neorv32_slink_get_tx_depth(void) {
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if (neorv32_slink_available()) {
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uint32_t tmp = (NEORV32_SLINK.CTRL >> SLINK_CTRL_TX_FIFO_S0) & 0x0f;
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return (int)(1 << tmp);
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Check if RX link FIFO fill level is >= half-full
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*
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* @param[in] link_id Link id (0..7).
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* @return 1 if fill level is >= half-full.
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**************************************************************************/
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int neorv32_slink_check_rx_half_full(int link_id) {
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const uint32_t mask = 1 << SLINK_STATUS_RX0_HALF;
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if (NEORV32_SLINK.STATUS & (mask << (link_id & 0x7))) {
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return 1;
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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* Check if TX link FIFO fill level is > half-full
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*
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* @param[in] link_id Link id (0..7).
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* @return 1 if fill level is > half-full.
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**************************************************************************/
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int neorv32_slink_check_tx_half_full(int link_id) {
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const uint32_t mask = 1 << SLINK_STATUS_TX0_HALF;
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if (NEORV32_SLINK.STATUS & (mask << (link_id & 0x7))) {
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return 1;
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}
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else {
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return 0;
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}
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}
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/**********************************************************************//**
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zero_gravi |
* Write data to TX stream link 0 (non-blocking)
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*
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* @param[in] tx_data Data to send to link.
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* @return 0 if data was send, 1 if link is still busy.
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**************************************************************************/
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int neorv32_slink_tx0_nonblocking(uint32_t tx_data) {
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if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX0_FREE)) {
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NEORV32_SLINK.DATA[0] = tx_data;
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return 0;
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}
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return 1;
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}
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/**********************************************************************//**
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* Write data to TX stream link 1 (non-blocking)
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*
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* @param[in] tx_data Data to send to link.
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* @return 0 if data was send, 1 if link is still busy.
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**************************************************************************/
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int neorv32_slink_tx1_nonblocking(uint32_t tx_data) {
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zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX1_FREE)) {
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NEORV32_SLINK.DATA[1] = tx_data;
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return 0;
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}
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return 1;
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}
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283 |
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284 |
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/**********************************************************************//**
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* Write data to TX stream link 2 (non-blocking)
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*
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* @param[in] tx_data Data to send to link.
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288 |
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* @return 0 if data was send, 1 if link is still busy.
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**************************************************************************/
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290 |
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int neorv32_slink_tx2_nonblocking(uint32_t tx_data) {
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291 |
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292 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX2_FREE)) {
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293 |
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NEORV32_SLINK.DATA[2] = tx_data;
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294 |
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zero_gravi |
return 0;
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}
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return 1;
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297 |
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}
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298 |
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299 |
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300 |
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/**********************************************************************//**
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301 |
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* Write data to TX stream link 3 (non-blocking)
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302 |
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*
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303 |
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* @param[in] tx_data Data to send to link.
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304 |
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* @return 0 if data was send, 1 if link is still busy.
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305 |
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**************************************************************************/
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306 |
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int neorv32_slink_tx3_nonblocking(uint32_t tx_data) {
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307 |
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308 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX3_FREE)) {
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309 |
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NEORV32_SLINK.DATA[3] = tx_data;
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310 |
61 |
zero_gravi |
return 0;
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311 |
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}
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312 |
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return 1;
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313 |
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}
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314 |
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315 |
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316 |
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/**********************************************************************//**
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317 |
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* Write data to TX stream link 4 (non-blocking)
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318 |
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*
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319 |
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* @param[in] tx_data Data to send to link.
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320 |
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* @return 0 if data was send, 1 if link is still busy.
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321 |
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**************************************************************************/
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322 |
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int neorv32_slink_tx4_nonblocking(uint32_t tx_data) {
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323 |
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324 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX4_FREE)) {
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325 |
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NEORV32_SLINK.DATA[4] = tx_data;
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326 |
61 |
zero_gravi |
return 0;
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327 |
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}
|
328 |
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return 1;
|
329 |
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}
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330 |
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331 |
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332 |
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/**********************************************************************//**
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333 |
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* Write data to TX stream link 5 (non-blocking)
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334 |
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*
|
335 |
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* @param[in] tx_data Data to send to link.
|
336 |
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* @return 0 if data was send, 1 if link is still busy.
|
337 |
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**************************************************************************/
|
338 |
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int neorv32_slink_tx5_nonblocking(uint32_t tx_data) {
|
339 |
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|
340 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX5_FREE)) {
|
341 |
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NEORV32_SLINK.DATA[5] = tx_data;
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342 |
61 |
zero_gravi |
return 0;
|
343 |
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}
|
344 |
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return 1;
|
345 |
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}
|
346 |
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347 |
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348 |
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/**********************************************************************//**
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349 |
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* Write data to TX stream link 6 (non-blocking)
|
350 |
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*
|
351 |
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* @param[in] tx_data Data to send to link.
|
352 |
|
|
* @return 0 if data was send, 1 if link is still busy.
|
353 |
|
|
**************************************************************************/
|
354 |
|
|
int neorv32_slink_tx6_nonblocking(uint32_t tx_data) {
|
355 |
|
|
|
356 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX6_FREE)) {
|
357 |
|
|
NEORV32_SLINK.DATA[6] = tx_data;
|
358 |
61 |
zero_gravi |
return 0;
|
359 |
|
|
}
|
360 |
|
|
return 1;
|
361 |
|
|
}
|
362 |
|
|
|
363 |
|
|
|
364 |
|
|
/**********************************************************************//**
|
365 |
|
|
* Write data to TX stream link 7 (non-blocking)
|
366 |
|
|
*
|
367 |
|
|
* @param[in] tx_data Data to send to link.
|
368 |
|
|
* @return 0 if data was send, 1 if link is still busy.
|
369 |
|
|
**************************************************************************/
|
370 |
|
|
int neorv32_slink_tx7_nonblocking(uint32_t tx_data) {
|
371 |
|
|
|
372 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_TX7_FREE)) {
|
373 |
|
|
NEORV32_SLINK.DATA[7] = tx_data;
|
374 |
61 |
zero_gravi |
return 0;
|
375 |
|
|
}
|
376 |
|
|
return 1;
|
377 |
|
|
}
|
378 |
|
|
|
379 |
|
|
|
380 |
|
|
/**********************************************************************//**
|
381 |
|
|
* Read data from RX stream link 0 (non-blocking)
|
382 |
|
|
*
|
383 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
384 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
385 |
|
|
**************************************************************************/
|
386 |
|
|
int neorv32_slink_rx0_nonblocking(uint32_t *rx_data) {
|
387 |
|
|
|
388 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX0_AVAIL)) {
|
389 |
|
|
*rx_data = NEORV32_SLINK.DATA[0];
|
390 |
61 |
zero_gravi |
return 0;
|
391 |
|
|
}
|
392 |
|
|
return 1;
|
393 |
|
|
}
|
394 |
|
|
|
395 |
|
|
|
396 |
|
|
/**********************************************************************//**
|
397 |
|
|
* Read data from RX stream link 1 (non-blocking)
|
398 |
|
|
*
|
399 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
400 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
401 |
|
|
**************************************************************************/
|
402 |
|
|
int neorv32_slink_rx1_nonblocking(uint32_t *rx_data) {
|
403 |
|
|
|
404 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX1_AVAIL)) {
|
405 |
|
|
*rx_data = NEORV32_SLINK.DATA[1];
|
406 |
61 |
zero_gravi |
return 0;
|
407 |
|
|
}
|
408 |
|
|
return 1;
|
409 |
|
|
}
|
410 |
|
|
|
411 |
|
|
|
412 |
|
|
/**********************************************************************//**
|
413 |
|
|
* Read data from RX stream link 2 (non-blocking)
|
414 |
|
|
*
|
415 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
416 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
417 |
|
|
**************************************************************************/
|
418 |
|
|
int neorv32_slink_rx2_nonblocking(uint32_t *rx_data) {
|
419 |
|
|
|
420 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX2_AVAIL)) {
|
421 |
|
|
*rx_data = NEORV32_SLINK.DATA[2];
|
422 |
61 |
zero_gravi |
return 0;
|
423 |
|
|
}
|
424 |
|
|
return 1;
|
425 |
|
|
}
|
426 |
|
|
|
427 |
|
|
|
428 |
|
|
/**********************************************************************//**
|
429 |
|
|
* Read data from RX stream link 3 (non-blocking)
|
430 |
|
|
*
|
431 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
432 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
433 |
|
|
**************************************************************************/
|
434 |
|
|
int neorv32_slink_rx3_nonblocking(uint32_t *rx_data) {
|
435 |
|
|
|
436 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX3_AVAIL)) {
|
437 |
|
|
*rx_data = NEORV32_SLINK.DATA[3];
|
438 |
61 |
zero_gravi |
return 0;
|
439 |
|
|
}
|
440 |
|
|
return 1;
|
441 |
|
|
}
|
442 |
|
|
|
443 |
|
|
|
444 |
|
|
/**********************************************************************//**
|
445 |
|
|
* Read data from RX stream link 4 (non-blocking)
|
446 |
|
|
*
|
447 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
448 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
449 |
|
|
**************************************************************************/
|
450 |
|
|
int neorv32_slink_rx4_nonblocking(uint32_t *rx_data) {
|
451 |
|
|
|
452 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX4_AVAIL)) {
|
453 |
|
|
*rx_data = NEORV32_SLINK.DATA[4];
|
454 |
61 |
zero_gravi |
return 0;
|
455 |
|
|
}
|
456 |
|
|
return 1;
|
457 |
|
|
}
|
458 |
|
|
|
459 |
|
|
|
460 |
|
|
/**********************************************************************//**
|
461 |
|
|
* Read data from RX stream link 5 (non-blocking)
|
462 |
|
|
*
|
463 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
464 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
465 |
|
|
**************************************************************************/
|
466 |
|
|
int neorv32_slink_rx5_nonblocking(uint32_t *rx_data) {
|
467 |
|
|
|
468 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX5_AVAIL)) {
|
469 |
|
|
*rx_data = NEORV32_SLINK.DATA[5];
|
470 |
61 |
zero_gravi |
return 0;
|
471 |
|
|
}
|
472 |
|
|
return 1;
|
473 |
|
|
}
|
474 |
|
|
|
475 |
|
|
|
476 |
|
|
/**********************************************************************//**
|
477 |
|
|
* Read data from RX stream link 6 (non-blocking)
|
478 |
|
|
*
|
479 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
480 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
481 |
|
|
**************************************************************************/
|
482 |
|
|
int neorv32_slink_rx6_nonblocking(uint32_t *rx_data) {
|
483 |
|
|
|
484 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX6_AVAIL)) {
|
485 |
|
|
*rx_data = NEORV32_SLINK.DATA[6];
|
486 |
61 |
zero_gravi |
return 0;
|
487 |
|
|
}
|
488 |
|
|
return 1;
|
489 |
|
|
}
|
490 |
|
|
|
491 |
|
|
|
492 |
|
|
/**********************************************************************//**
|
493 |
|
|
* Read data from RX stream link 7 (non-blocking)
|
494 |
|
|
*
|
495 |
|
|
* @param[in,out] rx_data Pointer to return read data. Only valid if function return value = 0.
|
496 |
|
|
* @return 0 if data was received, 1 if there is no data to fetch.
|
497 |
|
|
**************************************************************************/
|
498 |
|
|
int neorv32_slink_rx7_nonblocking(uint32_t *rx_data) {
|
499 |
|
|
|
500 |
64 |
zero_gravi |
if (NEORV32_SLINK.STATUS & (1 << SLINK_STATUS_RX7_AVAIL)) {
|
501 |
|
|
*rx_data = NEORV32_SLINK.DATA[7];
|
502 |
61 |
zero_gravi |
return 0;
|
503 |
|
|
}
|
504 |
|
|
return 1;
|
505 |
|
|
}
|