3  * This file is part of RT-Thread RTOS
4  * COPYRIGHT (C) 2006, RT-Thread Development Team
8  * http://openlab.rt-thread.com/license/LICENSE
12  * 2006-03-13     Bernard      first version
13  * 2009-04-20     yi.qiu       modified according bernard's stm32 version
14  * 2012-02-17     mojingxian   modified for bf53x
26 /* RT-Thread Device Interface */
30 static rt_err_t rt_serial_init (rt_device_t dev)  in rt_serial_init()  argument
32 	struct serial_device* uart = (struct serial_device*) dev->user_data;  in rt_serial_init()
34 	if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))  in rt_serial_init()
37 		if (dev->flag & RT_DEVICE_FLAG_INT_RX)  in rt_serial_init()
39 			rt_memset(uart->int_rx->rx_buffer, 0,   in rt_serial_init()
40 				sizeof(uart->int_rx->rx_buffer));  in rt_serial_init()
41 			uart->int_rx->read_index = uart->int_rx->save_index = 0;  in rt_serial_init()
44 		if (dev->flag & RT_DEVICE_FLAG_INT_TX)  in rt_serial_init()
46 			rt_memset(uart->int_tx->tx_buffer, 0,   in rt_serial_init()
47 				sizeof(uart->int_tx->tx_buffer));  in rt_serial_init()
48 			uart->int_tx->write_index = uart->int_tx->save_index = 0;  in rt_serial_init()
51 		dev->flag |= RT_DEVICE_FLAG_ACTIVATED;  in rt_serial_init()
65 	uart->int_rx->rx_buffer[uart->int_rx->save_index] = ch;  in rt_serial_savechar()
66 	uart->int_rx->save_index ++;  in rt_serial_savechar()
67 	if (uart->int_rx->save_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
68 		uart->int_rx->save_index = 0;  in rt_serial_savechar()
71 	if (uart->int_rx->save_index == uart->int_rx->read_index)  in rt_serial_savechar()
73 		uart->int_rx->read_index ++;  in rt_serial_savechar()
74 		if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
75 			uart->int_rx->read_index = 0;  in rt_serial_savechar()
82 static rt_err_t rt_serial_open(rt_device_t dev, rt_uint16_t oflag)  in rt_serial_open()  argument
84 	RT_ASSERT(dev != RT_NULL);  in rt_serial_open()
89 static rt_err_t rt_serial_close(rt_device_t dev)  in rt_serial_close()  argument
91 	RT_ASSERT(dev != RT_NULL);  in rt_serial_close()
96 static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)  in rt_serial_read()  argument
104 	uart = (struct serial_device*)dev->user_data;  in rt_serial_read()
106 	if (dev->flag & RT_DEVICE_FLAG_INT_RX)  in rt_serial_read()
113 			if (uart->int_rx->read_index != uart->int_rx->save_index)  in rt_serial_read()
115 				*ptr++ = uart->int_rx->rx_buffer[uart->int_rx->read_index];  in rt_serial_read()
116 				size --;  in rt_serial_read()
121 				uart->int_rx->read_index ++;  in rt_serial_read()
122 				if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_read()
123 					uart->int_rx->read_index = 0;  in rt_serial_read()
131 				err_code = -RT_EEMPTY;  in rt_serial_read()
139 		while ((rt_uint32_t)ptr - (rt_uint32_t)buffer < size)  in rt_serial_read()
141 			//while (uart->uart_device->ustat & USTAT_RCV_READY)  in rt_serial_read()
143 				*ptr = uart->uart_device->rbr_thr & 0xff;  in rt_serial_read()
151 	return (rt_uint32_t)ptr - (rt_uint32_t)buffer;  in rt_serial_read()
154 static rt_size_t rt_serial_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)  in rt_serial_write()  argument
162 	uart = (struct serial_device*)dev->user_data;  in rt_serial_write()
164 	if (dev->flag & RT_DEVICE_FLAG_INT_TX)  in rt_serial_write()
167 		while (uart->int_tx->save_index != uart->int_tx->write_index)  in rt_serial_write()
170 			uart->int_tx->tx_buffer[uart->int_tx->save_index] = *ptr++;  in rt_serial_write()
172 			-- size;  in rt_serial_write()
175 			uart->int_tx->save_index ++;  in rt_serial_write()
178 			if (uart->int_tx->save_index >= UART_TX_BUFFER_SIZE)  in rt_serial_write()
179 				uart->int_tx->save_index = 0;  in rt_serial_write()
183 		if (size > 0)  in rt_serial_write()
184 			err_code = -RT_EFULL;  in rt_serial_write()
195 			if (*ptr == '\n' && (dev->flag & RT_DEVICE_FLAG_STREAM))  in rt_serial_write()
197 				while (!(uart->uart_device->lsr & 0x20));  in rt_serial_write()
198 				uart->uart_device->rbr_thr = '\r';  in rt_serial_write()
201 			while (!(uart->uart_device->lsr & 0x20));  in rt_serial_write()
202 			uart->uart_device->rbr_thr = (*ptr & 0xFF);  in rt_serial_write()
204 			++ptr; --size;  in rt_serial_write()
211 	return (rt_uint32_t)ptr - (rt_uint32_t)buffer;  in rt_serial_write()
214 static rt_err_t rt_serial_control (rt_device_t dev, int cmd, void *args)  in rt_serial_control()  argument
216 	RT_ASSERT(dev != RT_NULL);  in rt_serial_control()
222 		dev->flag |= RT_DEVICE_FLAG_SUSPENDED;  in rt_serial_control()
227 		dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;  in rt_serial_control()
241 	device->type 		= RT_Device_Class_Char;  in rt_hw_serial_register()
242 	device->rx_indicate = RT_NULL;  in rt_hw_serial_register()
243 	device->tx_complete = RT_NULL;  in rt_hw_serial_register()
244 	device->init 		= rt_serial_init;  in rt_hw_serial_register()
245 	device->open		= rt_serial_open;  in rt_hw_serial_register()
246 	device->close		= rt_serial_close;  in rt_hw_serial_register()
247 	device->read 		= rt_serial_read;  in rt_hw_serial_register()
248 	device->write 		= rt_serial_write;  in rt_hw_serial_register()
249 	device->control 	= rt_serial_control;  in rt_hw_serial_register()
250 	device->user_data   = serial;  in rt_hw_serial_register()
259 	struct serial_device* uart = (struct serial_device*) device->user_data;  in rt_hw_serial_isr()
262 	RT_ASSERT(device->flag & RT_DEVICE_FLAG_INT_RX);  in rt_hw_serial_isr()
265 	//while (uart->uart_device->ustat & USTAT_RCV_READY)  in rt_hw_serial_isr()
267 		rt_serial_savechar(uart, uart->uart_device->rbr_thr & 0xff);  in rt_hw_serial_isr()
271 	if (device->rx_indicate != RT_NULL)  in rt_hw_serial_isr()
276 		rx_length = uart->int_rx->read_index > uart->int_rx->save_index ?  in rt_hw_serial_isr()
277 			UART_RX_BUFFER_SIZE - uart->int_rx->read_index + uart->int_rx->save_index :  in rt_hw_serial_isr()
278 			uart->int_rx->save_index - uart->int_rx->read_index;  in rt_hw_serial_isr()
280 		device->rx_indicate(device, rx_length);  in rt_hw_serial_isr()