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rt-thread-official/bsp/nuvoton/libraries/n9h30/rtt_port/drv_uart.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-1-11 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_UART)
#include <rtdevice.h>
#include <rthw.h>
#include "NuMicro.h"
#include <drv_uart.h>
#include <drv_sys.h>
/* Private define ---------------------------------------------------------------*/
enum
{
UART_START = -1,
#if defined(BSP_USING_UART0)
UART0_IDX,
#endif
#if defined(BSP_USING_UART1)
UART1_IDX,
#endif
#if defined(BSP_USING_UART2)
UART2_IDX,
#endif
#if defined(BSP_USING_UART3)
UART3_IDX,
#endif
#if defined(BSP_USING_UART4)
UART4_IDX,
#endif
#if defined(BSP_USING_UART5)
UART5_IDX,
#endif
#if defined(BSP_USING_UART6)
UART6_IDX,
#endif
#if defined(BSP_USING_UART7)
UART7_IDX,
#endif
#if defined(BSP_USING_UART8)
UART8_IDX,
#endif
#if defined(BSP_USING_UART9)
UART9_IDX,
#endif
#if defined(BSP_USING_UART10)
UART10_IDX,
#endif
UART_CNT
};
/* Private typedef --------------------------------------------------------------*/
struct nu_uart
{
rt_serial_t dev;
char *name;
UART_T *uart_base;
IRQn_Type irqn;
E_SYS_IPRST rstidx;
E_SYS_IPCLK clkidx;
};
typedef struct nu_uart *nu_uart_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg);
static rt_err_t nu_uart_control(struct rt_serial_device *serial, int cmd, void *arg);
static int nu_uart_send(struct rt_serial_device *serial, char c);
static int nu_uart_receive(struct rt_serial_device *serial);
/* Public functions ------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
static const struct rt_uart_ops nu_uart_ops =
{
.configure = nu_uart_configure,
.control = nu_uart_control,
.putc = nu_uart_send,
.getc = nu_uart_receive,
.dma_transmit = RT_NULL
};
static const struct serial_configure nu_uart_default_config =
RT_SERIAL_CONFIG_DEFAULT;
static struct nu_uart nu_uart_arr [] =
{
#if defined(BSP_USING_UART0)
{
.name = "uart0",
.uart_base = UART0,
.irqn = IRQ_UART0,
.rstidx = UART0RST,
.clkidx = UART0CKEN,
},
#endif
#if defined(BSP_USING_UART1)
{
.name = "uart1",
.uart_base = UART1,
.irqn = IRQ_UART1,
.rstidx = UART1RST,
.clkidx = UART1CKEN,
},
#endif
#if defined(BSP_USING_UART2)
{
.name = "uart2",
.uart_base = UART2,
.irqn = IRQ_UART2,
.rstidx = UART2RST,
.clkidx = UART2CKEN,
},
#endif
#if defined(BSP_USING_UART3)
{
.name = "uart3",
.uart_base = UART3,
.irqn = IRQ_UART3,
.rstidx = UART3RST,
.clkidx = UART3CKEN,
},
#endif
#if defined(BSP_USING_UART4)
{
.name = "uart4",
.uart_base = UART4,
.irqn = IRQ_UART4,
.rstidx = UART4RST,
.clkidx = UART4CKEN,
},
#endif
#if defined(BSP_USING_UART5)
{
.name = "uart5",
.uart_base = UART5,
.irqn = IRQ_UART5,
.rstidx = UART5RST,
.clkidx = UART5CKEN,
},
#endif
#if defined(BSP_USING_UART6)
{
.name = "uart6",
.uart_base = UART6,
.irqn = IRQ_UART6,
.rstidx = UART6RST,
.clkidx = UART6CKEN,
},
#endif
#if defined(BSP_USING_UART7)
{
.name = "uart7",
.uart_base = UART7,
.irqn = IRQ_UART7,
.rstidx = UART7RST,
.clkidx = UART7CKEN,
},
#endif
#if defined(BSP_USING_UART8)
{
.name = "uart8",
.uart_base = UART8,
.irqn = IRQ_UART8,
.rstidx = UART8RST,
.clkidx = UART8CKEN,
},
#endif
#if defined(BSP_USING_UART9)
{
.name = "uart9",
.uart_base = UART9,
.irqn = IRQ_UART9,
.rstidx = UART9RST,
.clkidx = UART9CKEN,
},
#endif
#if defined(BSP_USING_UART10)
{
.name = "uart10",
.uart_base = UARTA,
.irqn = IRQ_UART10,
.rstidx = UART10RST,
.clkidx = UART10CKEN,
},
#endif
}; /* uart nu_uart */
/**
* All UART interrupt service routine
*/
static void nu_uart_isr(int vector, void *param)
{
/* Get base address of uart register */
nu_uart_t serial = (nu_uart_t)param;
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
/* Get interrupt event */
uint32_t u32IntSts = uart_base->INTSTS;
uint32_t u32FIFOSts = uart_base->FIFOSTS;
/* Handle RX event */
if (u32IntSts & (UART_ISR_RDA_INT_Msk | UART_ISR_TOUT_INT_Msk))
{
rt_hw_serial_isr(&serial->dev, RT_SERIAL_EVENT_RX_IND);
}
uart_base->INTSTS = u32IntSts;
uart_base->FIFOSTS = u32FIFOSts;
}
/**
* Set RS-485 AUD mode
*/
void nu_uart_set_rs485aud(struct rt_serial_device *serial, rt_bool_t bRTSActiveLowLevel)
{
UART_T *uart_base;
RT_ASSERT(serial != RT_NULL);
/* Get base address of uart register */
uart_base = ((nu_uart_t)serial)->uart_base;
/* Set RTS as RS-485 phy direction controlling ping. */
uart_base->FUNCSEL = UART_FUNCSEL_RS485;
/* Set RS585 configuration */
uart_base->ALTCTL &= ~(UART_ALT_CSR_RS485_NMM_Msk | UART_ALT_CSR_RS485_AAD_Msk | UART_ALT_CSR_RS485_AUD_Msk | UART_ALT_CSR_RS485_ADD_EN_Msk);
uart_base->ALTCTL |= UART_ALT_CSR_RS485_AUD_Msk;
if (bRTSActiveLowLevel)
{
/* Set direction pin as active-high. */
uart_base->MODEM &= ~UART_MCR_LEV_RTS_Msk;
}
else
{
/* Set direction pin as active-low. */
uart_base->MODEM |= UART_MCR_LEV_RTS_Msk;
}
rt_kprintf("Set %s to RS-485 AUD function mode. ActiveLowLevel-%s\n", ((nu_uart_t)serial)->name, bRTSActiveLowLevel ? "YES" : "NO");
}
/**
* Configure uart port
*/
static rt_err_t nu_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
rt_err_t ret = RT_EOK;
uint32_t uart_word_len = 0;
uint32_t uart_stop_bit = 0;
uint32_t uart_parity = 0;
/* Get base address of uart register */
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
/* Check baudrate */
RT_ASSERT(cfg->baud_rate != 0);
/* Check word len */
switch (cfg->data_bits)
{
case DATA_BITS_5:
uart_word_len = UART_WORD_LEN_5;
break;
case DATA_BITS_6:
uart_word_len = UART_WORD_LEN_6;
break;
case DATA_BITS_7:
uart_word_len = UART_WORD_LEN_7;
break;
case DATA_BITS_8:
uart_word_len = UART_WORD_LEN_8;
break;
default:
rt_kprintf("Unsupported data length");
ret = -RT_EINVAL;
goto exit_nu_uart_configure;
}
/* Check stop bit */
switch (cfg->stop_bits)
{
case STOP_BITS_1:
uart_stop_bit = UART_STOP_BIT_1;
break;
case STOP_BITS_2:
uart_stop_bit = UART_STOP_BIT_2;
break;
default:
rt_kprintf("Unsupported stop bit");
ret = -RT_EINVAL;
goto exit_nu_uart_configure;
}
/* Check parity */
switch (cfg->parity)
{
case PARITY_NONE:
uart_parity = UART_PARITY_NONE;
break;
case PARITY_ODD:
uart_parity = UART_PARITY_ODD;
break;
case PARITY_EVEN:
uart_parity = UART_PARITY_EVEN;
break;
default:
rt_kprintf("Unsupported parity");
ret = -RT_EINVAL;
goto exit_nu_uart_configure;
}
nu_sys_ip_reset(((nu_uart_t)serial)->rstidx);
/* Open Uart and set UART Baudrate */
UART_Open(uart_base, cfg->baud_rate);
/* Set line configuration. */
UART_SetLineConfig(uart_base, 0, uart_word_len, uart_parity, uart_stop_bit);
/* Enable interrupt. */
rt_hw_interrupt_umask(((nu_uart_t)serial)->irqn);
exit_nu_uart_configure:
if (ret != RT_EOK)
UART_Close(uart_base);
return -(ret);
}
/**
* Uart interrupt control
*/
static rt_err_t nu_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
nu_uart_t psNuUart = (nu_uart_t)serial;
rt_err_t result = RT_EOK;
rt_uint32_t flag;
rt_ubase_t ctrl_arg = (rt_ubase_t)arg;
RT_ASSERT(serial != RT_NULL);
/* Get base address of uart register */
UART_T *uart_base = psNuUart->uart_base;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) /* Disable INT-RX */
{
flag = UART_IER_RDA_IEN_Msk | UART_IER_RTO_IEN_Msk | UART_IER_TIME_OUT_EN_Msk;
UART_DISABLE_INT(uart_base, flag);
}
else if (ctrl_arg == RT_DEVICE_FLAG_DMA_RX) /* Disable DMA-RX */
{
/* Disable Receive Line interrupt & Stop DMA RX transfer. */
}
break;
case RT_DEVICE_CTRL_SET_INT:
if (ctrl_arg == RT_DEVICE_FLAG_INT_RX) /* Enable INT-RX */
{
flag = UART_IER_RDA_IEN_Msk | UART_IER_RTO_IEN_Msk | UART_IER_TIME_OUT_EN_Msk;
UART_ENABLE_INT(uart_base, flag);
}
break;
case RT_DEVICE_CTRL_CLOSE:
/* Disable interrupt. */
rt_hw_interrupt_mask(psNuUart->irqn);
/* Close UART port */
UART_Close(uart_base);
break;
default:
result = -RT_EINVAL;
break;
}
return result;
}
/**
* Uart put char
*/
static int nu_uart_send(struct rt_serial_device *serial, char c)
{
RT_ASSERT(serial != RT_NULL);
/* Get base address of uart register */
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
/* Waiting if TX-FIFO is full. */
while (UART_IS_TX_FULL(uart_base));
/* Put char into TX-FIFO */
UART_WRITE(uart_base, c);
return 1;
}
/**
* Uart get char
*/
static int nu_uart_receive(struct rt_serial_device *serial)
{
RT_ASSERT(serial != RT_NULL);
/* Get base address of uart register */
UART_T *uart_base = ((nu_uart_t)serial)->uart_base;
/* Return failure if RX-FIFO is empty. */
if (UART_GET_RX_EMPTY(uart_base))
{
return -1;
}
/* Get char from RX-FIFO */
return UART_READ(uart_base);
}
/**
* Hardware UART Initialization
*/
rt_err_t rt_hw_uart_init(void)
{
int i;
rt_uint32_t flag = RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX;
rt_err_t ret = RT_EOK;
for (i = (UART_START + 1); i < UART_CNT; i++)
{
nu_uart_arr[i].dev.ops = &nu_uart_ops;
nu_uart_arr[i].dev.config = nu_uart_default_config;
rt_hw_interrupt_install(nu_uart_arr[i].irqn, nu_uart_isr, &nu_uart_arr[i], nu_uart_arr[i].name);
nu_sys_ipclk_enable(nu_uart_arr[i].clkidx);
ret = rt_hw_serial_register(&nu_uart_arr[i].dev, nu_uart_arr[i].name, flag, NULL);
RT_ASSERT(ret == RT_EOK);
}
return ret;
}
#endif //#if defined(BSP_USING_UART)
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