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rt-thread-official/bsp/hc32l196/drivers/drv_usart.c

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/*
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-9-1 DongBowen first version
*/
#include "drv_usart.h"
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#ifdef RT_USING_SERIAL
#ifdef BSP_USING_UART
#if !defined(BSP_USING_UART0) && !defined(BSP_USING_UART1) && !defined(BSP_USING_UART2) && \
!defined(BSP_USING_UART3)
#error "Please define at least one BSP_USING_UARTx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
enum
{
#ifdef BSP_USING_UART0
UART0_INDEX,
#endif
#ifdef BSP_USING_UART1
UART1_INDEX,
#endif
#ifdef BSP_USING_UART2
UART2_INDEX,
#endif
#ifdef BSP_USING_UART3
UART3_INDEX,
#endif
};
static struct hc_uart_cfg uart_cfg[] =
{
#ifdef BSP_USING_UART0
UART0_CFG,
#endif
#ifdef BSP_USING_UART1
UART1_CFG,
#endif
#ifdef BSP_USING_UART2
UART2_CFG,
#endif
#ifdef BSP_USING_UART3
UART3_CFG,
#endif
};
static struct hc_uart uart_drv[sizeof(uart_cfg) / sizeof(uart_cfg[0])] = {0};
static rt_err_t _uart_init(struct rt_serial_device *serial_device, struct serial_configure *configure)
{
stc_gpio_cfg_t stcGpioCfg;
stc_uart_cfg_t stcCfg;
struct hc_uart_cfg *cfg;
RT_ASSERT(serial_device != RT_NULL);
RT_ASSERT(configure != RT_NULL);
cfg = serial_device->parent.user_data;
/* configure rx and tx gpio */
rt_memset(&stcGpioCfg, 0, sizeof(stcGpioCfg));
Sysctrl_SetPeripheralGate(SysctrlPeripheralGpio, TRUE);
stcGpioCfg.enDir = GpioDirOut;
Gpio_Init(cfg->tx_port, cfg->tx_pin, &stcGpioCfg);
Gpio_SetAfMode(cfg->tx_port, cfg->tx_pin, cfg->tx_af);
stcGpioCfg.enDir = GpioDirIn;
Gpio_Init(cfg->rx_port, cfg->rx_pin, &stcGpioCfg);
Gpio_SetAfMode(cfg->rx_port, cfg->rx_pin, cfg->rx_af);
/* configure uart */
rt_memset(&stcCfg, 0, sizeof(stcCfg));
Sysctrl_SetPeripheralGate(cfg->uart_periph, TRUE);
stcCfg.stcBaud.u32Baud = configure->baud_rate;
stcCfg.stcBaud.enClkDiv = UartMsk8Or16Div;
stcCfg.stcBaud.u32Pclk = Sysctrl_GetPClkFreq();
switch (configure->data_bits)
{
case DATA_BITS_8:
break;
default:
break;
}
switch (configure->stop_bits)
{
case STOP_BITS_1:
stcCfg.enStopBit = UartMsk1bit;
break;
case STOP_BITS_2:
stcCfg.enStopBit = UartMsk2bit;
break;
default:
stcCfg.enStopBit = UartMsk1bit;
break;
}
switch (configure->parity)
{
case PARITY_NONE:
stcCfg.enMmdorCk = UartMskDataOrAddr;
stcCfg.enRunMode = UartMskMode1;
break;
case PARITY_ODD:
stcCfg.enMmdorCk = UartMskOdd;
stcCfg.enRunMode = UartMskMode3;
break;
case PARITY_EVEN:
stcCfg.enMmdorCk = UartMskEven;
stcCfg.enRunMode = UartMskMode3;
break;
default:
stcCfg.enMmdorCk = UartMskDataOrAddr;
stcCfg.enRunMode = UartMskMode1;
break;
}
Uart_Init(cfg->uart, &stcCfg);
Uart_ClrStatus(cfg->uart, UartRC);
Uart_ClrStatus(cfg->uart, UartTC);
rt_hw_us_delay(2);
return RT_EOK;
}
static rt_err_t _uart_control(struct rt_serial_device *serial_device, int cmd, void *arg)
{
struct hc_uart_cfg *cfg;
RT_ASSERT(serial_device != RT_NULL);
cfg = serial_device->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
Uart_DisableIrq(cfg->uart, UartRxIrq);
EnableNvic(cfg->irqn, IrqLevel3, FALSE);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
Uart_EnableIrq(cfg->uart, UartRxIrq);
EnableNvic(cfg->irqn, IrqLevel3, TRUE);
break;
}
return RT_EOK;
}
static int _uart_putc(struct rt_serial_device *serial_device, char c)
{
struct hc_uart_cfg *cfg;
RT_ASSERT(serial_device != RT_NULL);
cfg = serial_device->parent.user_data;
Uart_SendDataPoll(cfg->uart, (uint8_t)c);
return 1;
}
static int _uart_getc(struct rt_serial_device *serial_device)
{
int ch;
struct hc_uart_cfg *cfg;
RT_ASSERT(serial_device != RT_NULL);
cfg = serial_device->parent.user_data;
ch = -1;
if (Uart_GetStatus(cfg->uart, UartRC))
{
Uart_ClrStatus(cfg->uart, UartRC);
ch = Uart_ReceiveData(cfg->uart);
}
return ch;
}
static const struct rt_uart_ops _uart_ops =
{
.configure = _uart_init,
.control = _uart_control,
.putc = _uart_putc,
.getc = _uart_getc,
.dma_transmit = RT_NULL
};
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void rt_hw_uart_isr(struct rt_serial_device *serial_device)
{
struct hc_uart_cfg *cfg;
uint32_t status;
RT_ASSERT(serial_device != RT_NULL);
cfg = serial_device->parent.user_data;
status = cfg->uart->ISR;
/* UART in mode Receiver -------------------------------------------------*/
if (status & (1 << UartFE))
{
Uart_ClrStatus(cfg->uart, UartFE);
}
if (status & (1 << UartPE))
{
Uart_ClrStatus(cfg->uart, UartPE);
}
if (status & (1 << UartRC))
{
rt_hw_serial_isr(serial_device, RT_SERIAL_EVENT_RX_IND);
}
}
#if defined(BSP_USING_UART0)
void Uart0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_uart_isr(&(uart_drv[UART0_INDEX].serial_device));
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART0 */
#if defined(BSP_USING_UART1)
void Uart1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_uart_isr(&(uart_drv[UART1_INDEX].serial_device));
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART1 */
#if defined(BSP_USING_UART2)
void Uart2_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_uart_isr(&(uart_drv[UART2_INDEX].serial_device));
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART2 */
#if defined(BSP_USING_UART3)
void Uart3_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_hw_uart_isr(&(uart_drv[UART3_INDEX].serial_device));
/* leave interrupt */
rt_interrupt_leave();
}
#endif /* BSP_USING_UART3 */
int rt_hw_uart_init(void)
{
struct serial_configure cfg = RT_SERIAL_CONFIG_DEFAULT;
int i = 0;
rt_err_t result = RT_EOK;
for (i = 0; i < sizeof(uart_cfg) / sizeof(uart_cfg[0]); i++)
{
uart_drv[i].cfg = &uart_cfg[i];
uart_drv[i].serial_device.ops = &_uart_ops;
uart_drv[i].serial_device.config = cfg;
/* register UART device */
result = rt_hw_serial_register(&uart_drv[i].serial_device, uart_drv[i].cfg->name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart_drv[i].cfg);
RT_ASSERT(result == RT_EOK);
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_uart_init);
#endif /* BSP_USING_UART */
#endif /* RT_USING_SERIAL */
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