stm32h7: usart: support new fifo features
Supported by H7 and G4 varieties at present.
This commit is contained in:
Brian Viele
Karl Palsson
parent
fa3c1df6f5
commit
aabefeac92
164
include/libopencm3/stm32/common/usart_common_fifos.h
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164
include/libopencm3/stm32/common/usart_common_fifos.h
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/** @addtogroup usart_defines
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2019 Brian Viele <vielster@allocor.tech>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBOPENCM3_STM32_COMMON_USART_COMMON_FIFOS_H_
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#define LIBOPENCM3_STM32_COMMON_USART_COMMON_FIFOS_H_
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#include <libopencm3/cm3/common.h>
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#include <libopencm3/stm32/common/usart_common_all.h>
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#include <libopencm3/stm32/common/usart_common_v2.h>
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/** @addtogroup usart_registers
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@{*/
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#define USART_PRESC(usart_base) MMIO32((usart_base) + 0x2C)
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/**@}*/
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/** @addtogroup usart_cr1_values
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@{*/
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/** RX FIFO Full Interrupt Enable. */
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#define USART_CR1_RXFFIE BIT31
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/** TX FIFO Empty Interrupt Enable. */
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#define USART_CR1_TXFEIE BIT30
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/** FIFO Enable bit. */
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#define USART_CR1_FIFOEN BIT29
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/**@}*/
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/** @addtogroup usart_cr3_values
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@{*/
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/** FIFO Threshold definitions. */
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typedef enum {
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USART_FIFO_THRESH_EIGTH = 0x0,
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USART_FIFO_THRESH_QUARTER = 0x1,
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USART_FIFO_THRESH_HALF = 0x2,
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USART_FIFO_THRESH_THREEQTR = 0x3,
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USART_FIFO_THRESH_SEVENEIGTH = 0x4,
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USART_FIFO_THRESH_TX_EMPTY = 0x5,
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USART_FIFO_THRESH_RX_FULL = 0x5,
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USART_FIFO_THRESH_MASK = 0x7
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} usart_fifo_threshold_t;
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/** TX FIFO Threshold Configuration bits. */
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#define USART_CR3_TXFTCFG_SHIFT 29
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/** RX FIFO THreshold Interrupt Enable. */
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#define USART_CR3_RXFTIE BIT28
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/** RX FIFO Threshold Configuration bits. */
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#define USART_CR3_RXFTCFG_SHIFT 25
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/** Transmission Complete Before Guard Time Enable bit. */
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#define USART_CR3_TCBGTIE BIT24
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/** TX FIFO THreshold Interrupt Enable. */
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#define USART_CR3_TXFTIE BIT23
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/**@}*/
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/** @addtogroup usart_isr_values
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@{*/
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/** TX FIFO Threshold Interrupt Flag. */
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#define USART_ISR_TXFT BIT27
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/** RX FIFO Threshold Interrupt Flag. */
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#define USART_ISR_RXFT BIT26
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/** Transmission Complete before Guard Time Interrupt Flag. */
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#define USART_ISR_TCBGT BIT25
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/** RX FIFO Full Flag. */
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#define USART_ISR_RXFF BIT24
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/** TX FIFO Empty Flag. */
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#define USART_ISR_TXFE BIT23
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/** SPI Slave Underrun Flag. */
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#define USART_ISR_UDR BIT13
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/**@}*/
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/** @addtogroup usart_icr_values
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@{*/
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/** SPI Slave Underrun Clear Flag. */
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#define USART_ICR_UDR BIT13
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/** TX FIFO Empty Clear Flag. */
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#define USART_ICR_TXFECF BIT5
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/**@}*/
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BEGIN_DECLS
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/** @addtogroup usart_file
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@{*/
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/**
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* Enable FIFOs on the specified USART.
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* @param[in] usart Base address of USART to configure FIFOs.
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*/
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void usart_enable_fifos(uint32_t usart);
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/**
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* Disable FIFOs on the specified USART.
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* @param[in] usart Base address of USART to configure FIFOs.
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*/
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void usart_disable_fifos(uint32_t usart);
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/**
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* Enable TX FIFO empty interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_enable_tx_fifo_empty_interrupt(uint32_t usart);
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/**
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* Disable TX FIFO empty interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_disable_tx_fifo_empty_interrupt(uint32_t usart);
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/**
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* Enable TX FIFO empty interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_enable_tx_fifo_threshold_interrupt(uint32_t usart);
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/**
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* Disable TX FIFO empty interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_disable_tx_fifo_threshold_interrupt(uint32_t usart);
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/**
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* Configure TX FIFO threshold on specified UART.
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* @param[in] usart Base address of USART to configure FIFO.
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* @param[in] threshold Threshold value to set for TX FIFO.
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*/
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void usart_set_tx_fifo_threshold(uint32_t usart,
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usart_fifo_threshold_t threshold);
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/**
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* Enable RX FIFO full interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_enable_rx_fifo_full_interrupt(uint32_t usart);
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/**
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* Disable RX FIFO full interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_disable_rx_fifo_full_interrupt(uint32_t usart);
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/**
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* Enable RX FIFO threshold interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_enable_rx_fifo_threshold_interrupt(uint32_t usart);
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/**
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* Disable RX FIFO threshold interrupt on the specified USART.
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* @param[in] usart Base address of USART to configure FIFO interrupt.
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*/
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void usart_disable_rx_fifo_threshold_interrupt(uint32_t usart);
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/**
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* Configure RX FIFO threshold on specified UART.
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* @param[in] usart Base address of USART to configure FIFO.
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* @param[in] threshold Threshold value to set for RX FIFO.
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*/
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void usart_set_rx_fifo_threshold(uint32_t usart,
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usart_fifo_threshold_t threshold);
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/**@}*/
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END_DECLS
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#endif /* LIBOPENCM3_STM32_COMMON_USART_COMMON_FIFOS_H_ */
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@ -31,11 +31,9 @@
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#ifndef LIBOPENCM3_USART_H
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#define LIBOPENCM3_USART_H
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#include <libopencm3/stm32/common/usart_common_all.h>
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#include <libopencm3/stm32/common/usart_common_v2.h>
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#include <libopencm3/stm32/common/usart_common_fifos.h>
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/**@{*/
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/** @defgroup usart_reg_base USART register base addresses
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* Holds all the U(S)ART peripherals supported.
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* @{
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72
lib/stm32/common/usart_common_fifos.c
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72
lib/stm32/common/usart_common_fifos.c
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@ -0,0 +1,72 @@
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/*
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* This file is part of the libopencm3 project.
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/usart.h>
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void usart_enable_fifos(uint32_t usart) {
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USART_CR1(usart) |= USART_CR1_FIFOEN;
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}
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void usart_disable_fifos(uint32_t usart) {
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USART_CR1(usart) &= ~USART_CR1_FIFOEN;
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}
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void usart_enable_tx_fifo_empty_interrupt(uint32_t usart) {
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USART_CR1(usart) |= USART_CR1_TXFEIE;
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}
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void usart_disable_tx_fifo_empty_interrupt(uint32_t usart) {
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USART_CR1(usart) &= ~USART_CR1_TXFEIE;
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}
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void usart_enable_tx_fifo_threshold_interrupt(uint32_t usart) {
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USART_CR3(usart) |= USART_CR3_TXFTIE;
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}
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void usart_disable_tx_fifo_threshold_interrupt(uint32_t usart) {
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USART_CR3(usart) &= ~USART_CR3_TXFTIE;
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}
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void usart_set_tx_fifo_threshold(uint32_t usart,
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usart_fifo_threshold_t threshold) {
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uint32_t cr3 = USART_CR3(usart) &
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~(USART_FIFO_THRESH_MASK << USART_CR3_TXFTCFG_SHIFT);
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USART_CR3(usart) = cr3 | (threshold << USART_CR3_TXFTCFG_SHIFT);
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}
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void usart_enable_rx_fifo_full_interrupt(uint32_t usart) {
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USART_CR1(usart) |= USART_CR1_RXFFIE;
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}
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void usart_disable_rx_fifo_full_interrupt(uint32_t usart) {
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USART_CR1(usart) &= ~USART_CR1_RXFFIE;
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}
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void usart_enable_rx_fifo_threshold_interrupt(uint32_t usart) {
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USART_CR3(usart) |= USART_CR3_RXFTIE;
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}
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void usart_disable_rx_fifo_threshold_interrupt(uint32_t usart) {
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USART_CR3(usart) &= ~USART_CR3_RXFTIE;
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}
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void usart_set_rx_fifo_threshold(uint32_t usart,
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usart_fifo_threshold_t threshold) {
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uint32_t cr3 = USART_CR3(usart) &
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~(USART_FIFO_THRESH_MASK << USART_CR3_RXFTCFG_SHIFT);
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USART_CR3(usart) = cr3 | (threshold << USART_CR3_RXFTCFG_SHIFT);
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}
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@ -45,7 +45,7 @@ OBJS += pwr.o rcc.o
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OBJS += rcc_common_all.o
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OBJS += spi_common_all.o spi_common_v2.o
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OBJS += timer_common_all.o
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OBJS += usart_common_all.o usart_common_v2.o
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OBJS += usart_common_all.o usart_common_v2.o usart_common_fifos.o
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VPATH += ../../usb:../:../../cm3:../common
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