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/*
* Copyright (c) 2020-2020, Bluetrum Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-11-20 greedyhao first version
*/
#include "board.h"
#include "drv_usart.h"
#ifdef RT_USING_SERIAL
//#define DRV_DEBUG
#define LOG_TAG "drv.usart"
#include <drv_log.h>
#undef RT_SERIAL_USING_DMA
enum
{
UART0_INDEX,
UART1_INDEX,
};
static struct ab32_uart_config uart_config[] =
{
{
.name = "uart0",
.instance = UART0_BASE,
},
{
.name = "uart1",
.instance = UART1_BASE,
}
};
static struct ab32_uart uart_obj[sizeof(uart_config) / sizeof(uart_config[0])] = {0};
static rt_err_t ab32_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct ab32_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = rt_container_of(serial, struct ab32_uart, serial);
uart->handle.instance = uart->config->instance;
uart->handle.init.baud = cfg->baud_rate;
uart->handle.init.mode = UART_MODE_TX_RX;
switch (cfg->data_bits)
{
case DATA_BITS_8:
uart->handle.init.word_len = UART_WORDLENGTH_8B;
break;
case DATA_BITS_9:
uart->handle.init.word_len = UART_WORDLENGTH_9B;
break;
default:
uart->handle.init.word_len = UART_WORDLENGTH_8B;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart->handle.init.stop_bits = UART_STOPBITS_1;
break;
case STOP_BITS_2:
uart->handle.init.stop_bits = UART_STOPBITS_2;
break;
default:
uart->handle.init.stop_bits = UART_STOPBITS_1;
break;
}
#ifdef RT_SERIAL_USING_DMA
uart->dma_rx.last_index = 0;
#endif
hal_uart_init(&uart->handle);
return RT_EOK;
}
static rt_err_t ab32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct ab32_uart *uart;
#ifdef RT_SERIAL_USING_DMA
rt_ubase_t ctrl_arg = (rt_ubase_t)arg;
#endif
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ab32_uart, serial);
switch (cmd)
{
/* disable interrupt */
case RT_DEVICE_CTRL_CLR_INT:
hal_uart_control(uart->handle.instance, UART_RXIT_ENABLE, HAL_DISABLE);
break;
/* enable interrupt */
case RT_DEVICE_CTRL_SET_INT:
hal_uart_clrflag(uart->handle.instance, UART_FLAG_RXPND);
hal_uart_control(uart->handle.instance, UART_RXIT_ENABLE, HAL_ENABLE);
break;
case RT_DEVICE_CTRL_CLOSE:
hal_uart_deinit(uart->handle.instance);
break;
}
return RT_EOK;
}
static int ab32_putc(struct rt_serial_device *serial, char ch)
{
struct ab32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ab32_uart, serial);
hal_uart_clrflag(uart->handle.instance, UART_FLAG_TXPND);
hal_uart_write(uart->handle.instance, ch);
while(hal_uart_getflag(uart->handle.instance, UART_FLAG_TXPND) == 0);
return 1;
}
static int ab32_getc(struct rt_serial_device *serial)
{
int ch;
struct ab32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = rt_container_of(serial, struct ab32_uart, serial);
ch = -1;
if(hal_uart_getflag(uart->handle.instance, UART_FLAG_RXPND) != HAL_RESET) {
ch = hal_uart_read(uart->handle.instance);
hal_uart_clrflag(uart->handle.instance, UART_FLAG_RXPND);
}
return ch;
}
static rt_size_t ab32_dma_transmit(struct rt_serial_device *serial, rt_uint8_t *buf, rt_size_t size, int direction)
{
return -1;
}
static void uart_isr(int vector, void *param)
{
rt_interrupt_enter();
if(hal_uart_getflag(UART0_BASE, UART_FLAG_RXPND)) //RX one byte finish
{
rt_hw_serial_isr(&(uart_obj[UART0_INDEX].serial), RT_SERIAL_EVENT_RX_IND);
}
// if(hal_uart_getflag(UART1_BASE, UART_FLAG_RXPND)) //RX one byte finish
// {
// rt_hw_serial_isr(&(uart_obj[UART1_INDEX].serial), RT_SERIAL_EVENT_RX_IND);
// }
rt_interrupt_leave();
}
static const struct rt_uart_ops ab32_uart_ops =
{
.configure = ab32_configure,
.control = ab32_control,
.putc = ab32_putc,
.getc = ab32_getc,
.dma_transmit = ab32_dma_transmit
};
int rt_hw_usart_init(void)
{
rt_size_t obj_num = sizeof(uart_obj) / sizeof(struct ab32_uart);
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
rt_err_t result = 0;
rt_hw_interrupt_install(IRQ_UART0_2_VECTOR, uart_isr, RT_NULL, "ut_isr");
for (int i = 0; i < obj_num; i++)
{
/* init UART object */
uart_obj[i].config = &uart_config[i];
uart_obj[i].serial.ops = &ab32_uart_ops;
uart_obj[i].serial.config = config;
uart_obj[i].serial.config.baud_rate = 1500000;
/* register UART device */
result = rt_hw_serial_register(&uart_obj[i].serial, uart_obj[i].config->name,
RT_DEVICE_FLAG_RDWR
| RT_DEVICE_FLAG_INT_RX
| RT_DEVICE_FLAG_INT_TX
| uart_obj[i].uart_dma_flag
, NULL);
RT_ASSERT(result == RT_EOK);
}
return result;
}
#endif
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