From 265a55303e3ef73ca4da5ed211a35deca755fa8d Mon Sep 17 00:00:00 2001 From: Raman Gopalan Date: Mon, 16 Oct 2023 13:30:11 +0530 Subject: Implement UART driver files for AT32UC3B: Working commit --- libcpu/avr32/uc3/serial.c | 273 ---------------------------------------------- libcpu/avr32/uc3/serial.h | 50 --------- 2 files changed, 323 deletions(-) delete mode 100644 libcpu/avr32/uc3/serial.c delete mode 100644 libcpu/avr32/uc3/serial.h (limited to 'libcpu') diff --git a/libcpu/avr32/uc3/serial.c b/libcpu/avr32/uc3/serial.c deleted file mode 100644 index aa63ae846f..0000000000 --- a/libcpu/avr32/uc3/serial.c +++ /dev/null @@ -1,273 +0,0 @@ -/* - * Copyright (c) 2006-2022, RT-Thread Development Team - * - * SPDX-License-Identifier: Apache-2.0 - * - * Change Logs: - * Date Author Notes - * 2009-02-05 Bernard first version - * 2009-10-25 Bernard fix rt_serial_read bug when there is no data - * in the buffer. - * 2010-03-29 Bernard cleanup code. - * 2010-03-30 Kyle Ported from STM32 to AVR32. - */ - -#include "serial.h" -#include "compiler.h" -#include "usart.h" - -struct rt_device _rt_usart_device; -struct avr32_serial_int_rx _rt_usart_rx; -struct avr32_serial_device uart = -{ - .uart_device = (avr32_usart_t *) &AVR32_USART1, - .int_rx = &_rt_usart_rx -}; - -/** - * @addtogroup AVR32UC3 - */ -/*@{*/ - -/* RT-Thread Device Interface */ -static rt_err_t rt_serial_init (rt_device_t dev) -{ - struct avr32_serial_device* uart = (struct avr32_serial_device*) dev->user_data; - - if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED)) - { - if (dev->flag & RT_DEVICE_FLAG_INT_RX) - { - rt_memset(uart->int_rx->rx_buffer, 0, sizeof(uart->int_rx->rx_buffer)); - uart->int_rx->read_index = 0; - uart->int_rx->save_index = 0; - } - - dev->flag |= RT_DEVICE_FLAG_ACTIVATED; - } - - return RT_EOK; -} - -static rt_err_t rt_serial_open(rt_device_t dev, rt_uint16_t oflag) -{ - return RT_EOK; -} - -static rt_err_t rt_serial_close(rt_device_t dev) -{ - return RT_EOK; -} - -static rt_ssize_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size) -{ - rt_uint8_t* ptr; - rt_err_t err_code; - struct avr32_serial_device* uart; - - ptr = buffer; - err_code = RT_EOK; - uart = (struct avr32_serial_device*)dev->user_data; - - if (dev->flag & RT_DEVICE_FLAG_INT_RX) - { - /* interrupt mode Rx */ - while (size) - { - rt_base_t level; - - /* disable interrupt */ - level = rt_hw_interrupt_disable(); - - if (uart->int_rx->read_index != uart->int_rx->save_index) - { - /* read a character */ - *ptr++ = uart->int_rx->rx_buffer[uart->int_rx->read_index]; - size--; - - /* move to next position */ - uart->int_rx->read_index ++; - if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE) - uart->int_rx->read_index = 0; - } - else - { - /* set error code */ - err_code = -RT_EEMPTY; - - /* enable interrupt */ - rt_hw_interrupt_enable(level); - break; - } - - /* enable interrupt */ - rt_hw_interrupt_enable(level); - } - } - else - { - /* polling mode */ - while ((rt_uint32_t)ptr - (rt_uint32_t)buffer < size) - { - while (usart_test_hit(uart->uart_device)) - { - *ptr = uart->uart_device->rhr & 0xff; - ptr ++; - } - } - } - - /* set error code */ - rt_set_errno(err_code); - return (rt_uint32_t)ptr - (rt_uint32_t)buffer; -} - -static rt_ssize_t rt_serial_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size) -{ - rt_uint8_t* ptr; - rt_err_t err_code; - struct avr32_serial_device* uart; - - err_code = RT_EOK; - ptr = (rt_uint8_t*)buffer; - uart = (struct avr32_serial_device*)dev->user_data; - - if (dev->flag & RT_DEVICE_FLAG_INT_TX) - { - /* interrupt mode Tx, does not support */ - RT_ASSERT(0); - } - else - { - /* polling mode */ - if (dev->flag & RT_DEVICE_FLAG_STREAM) - { - /* stream mode */ - while (size) - { - usart_putchar(uart->uart_device, (int) *ptr); - - ++ptr; --size; - } - } - else - { - /* write data directly */ - while (size) - { - usart_bw_write_char(uart->uart_device, (int) *ptr); - - ++ptr; --size; - } - } - } - - /* set error code */ - rt_set_errno(err_code); - - return (rt_uint32_t)ptr - (rt_uint32_t)buffer; -} - -static rt_err_t rt_serial_control (rt_device_t dev, int cmd, void *args) -{ - struct avr32_serial_device* uart; - - RT_ASSERT(dev != RT_NULL); - - uart = (struct avr32_serial_device*)dev->user_data; - switch (cmd) - { - case RT_DEVICE_CTRL_SUSPEND: - /* suspend device */ - dev->flag |= RT_DEVICE_FLAG_SUSPENDED; - break; - - case RT_DEVICE_CTRL_RESUME: - /* resume device */ - dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED; - break; - } - - return RT_EOK; -} - -/* - * serial register for STM32 - * support STM32F103VB and STM32F103ZE - */ -rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct avr32_serial_device *serial) -{ - RT_ASSERT(device != RT_NULL); - - if ((flag & RT_DEVICE_FLAG_DMA_RX) || - (flag & RT_DEVICE_FLAG_INT_TX)) - { - RT_ASSERT(0); - } - - device->type = RT_Device_Class_Char; - device->rx_indicate = RT_NULL; - device->tx_complete = RT_NULL; - device->init = rt_serial_init; - device->open = rt_serial_open; - device->close = rt_serial_close; - device->read = rt_serial_read; - device->write = rt_serial_write; - device->control = rt_serial_control; - device->user_data = serial; - - /* register a character device */ - return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR | flag); -} - -/* ISR for serial interrupt */ -void rt_hw_serial_isr(void) -{ - struct avr32_serial_device* uart = (struct avr32_serial_device*) _rt_usart_device.user_data; - rt_base_t level; - - if (usart_test_hit(uart->uart_device)) - { - /* interrupt mode receive */ - RT_ASSERT(device->flag & RT_DEVICE_FLAG_INT_RX); - - /* disable interrupt */ - level = rt_hw_interrupt_disable(); - - /* save character */ - uart->int_rx->rx_buffer[uart->int_rx->save_index] = uart->uart_device->rhr & 0xff; - uart->int_rx->save_index ++; - if (uart->int_rx->save_index >= UART_RX_BUFFER_SIZE) - uart->int_rx->save_index = 0; - - /* if the next position is read index, discard this 'read char' */ - if (uart->int_rx->save_index == uart->int_rx->read_index) - { - uart->int_rx->read_index ++; - if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE) - uart->int_rx->read_index = 0; - } - - /* enable interrupt */ - rt_hw_interrupt_enable(level); - - /* invoke callback */ - if (_rt_usart_device.rx_indicate != RT_NULL) - { - rt_size_t rx_length; - - /* get rx length */ - rx_length = uart->int_rx->read_index > uart->int_rx->save_index ? - UART_RX_BUFFER_SIZE - uart->int_rx->read_index + uart->int_rx->save_index : - uart->int_rx->save_index - uart->int_rx->read_index; - - _rt_usart_device.rx_indicate(&_rt_usart_device, rx_length); - } - } - else - { - usart_reset_status(uart->uart_device); - } -} - -/*@}*/ diff --git a/libcpu/avr32/uc3/serial.h b/libcpu/avr32/uc3/serial.h deleted file mode 100644 index 54c057ab1d..0000000000 --- a/libcpu/avr32/uc3/serial.h +++ /dev/null @@ -1,50 +0,0 @@ -/* - * Copyright (c) 2006-2022, RT-Thread Development Team - * - * SPDX-License-Identifier: Apache-2.0 - * - * Change Logs: - * Date Author Notes - * 2009-01-05 Bernard first version - * 2010-03-29 Bernard remove interrupt tx and DMA rx mode. - * 2010-03-30 Kyle Ported from STM32 to AVR32. - */ - -#ifndef __RT_HW_SERIAL_H__ -#define __RT_HW_SERIAL_H__ - -#include -#include -#include "compiler.h" -#include "usart.h" - -#define UART_RX_BUFFER_SIZE 64 -#define UART_TX_DMA_NODE_SIZE 4 - -/* data node for Tx Mode */ -struct avr32_serial_data_node -{ - rt_uint8_t *data_ptr; - rt_size_t data_size; - struct avr32_serial_data_node *next, *prev; -}; - -struct avr32_serial_int_rx -{ - rt_uint8_t rx_buffer[UART_RX_BUFFER_SIZE]; - rt_uint32_t read_index, save_index; -}; - -struct avr32_serial_device -{ - avr32_usart_t *uart_device; - - /* rx structure */ - struct avr32_serial_int_rx* int_rx; -}; - -rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct avr32_serial_device *serial); - -void rt_hw_serial_isr(); - -#endif -- cgit v1.3.1