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lpc43xx: add uart3 support

This commit is contained in:
Grissiom 2015-01-04 20:43:32 +08:00
parent a447b5f3cf
commit f609a63564
1 changed files with 79 additions and 11 deletions
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90
bsp/lpc43xx/drivers/drv_uart.c
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@ -154,6 +154,22 @@ void UART2_IRQHandler(void)
}
#endif
#if defined(RT_USING_UART3)
struct lpc_uart uart3 =
{
LPC_USART3,
USART3_IRQn,
};
struct rt_serial_device serial3;
void UART3_IRQHandler(void)
{
rt_interrupt_enter();
_do_uart_isr(&serial3);
rt_interrupt_leave();
}
#endif
void rt_hw_uart_init(void)
{
struct lpc_uart *uart;
@ -194,11 +210,11 @@ void rt_hw_uart_init(void)
(1 << 0) ; /* Pin P2_1 used as U0_RXD */
/* Init USART0 */
LPC_USART0->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
LPC_USART0->DLL = 0x06; /* 115200 Baudrate @ 12 MHz IRC */
LPC_USART0->DLM = 0x00;
LPC_USART0->FDR = 0xC1;
LPC_USART0->LCR = 0x03; /* DLAB = 0 */
uart->USART->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
uart->USART->DLL = 0x06; /* 115200 Baudrate @ 12 MHz IRC */
uart->USART->DLM = 0x00;
uart->USART->FDR = 0xC1;
uart->USART->LCR = 0x03; /* DLAB = 0 */
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(uart->USART_IRQn, ((0x01 << 3) | 0x01));
@ -228,7 +244,7 @@ void rt_hw_uart_init(void)
while (!(LPC_CCU1->CLK_M4_GPIO_STAT & 0x01));
/* Enable USART2 peripheral clock */
LPC_CCU2->CLK_APB0_USART2_CFG |= 0x01;
LPC_CCU2->CLK_APB2_USART2_CFG |= 0x01;
while (!(LPC_CCU2->CLK_APB2_USART2_STAT & 0x01));
/* Enable USART2 register interface clock */
@ -245,11 +261,11 @@ void rt_hw_uart_init(void)
(1 << 0) ; /* Pin P1_16 used as U2_RXD */
/* Init USART2 */
LPC_USART2->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
LPC_USART2->DLL = 0x06; /* 115200 Baudrate @ 12 MHz IRC */
LPC_USART2->DLM = 0x00;
LPC_USART2->FDR = 0xC1;
LPC_USART2->LCR = 0x03; /* DLAB = 0 */
uart->USART->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
uart->USART->DLL = 0x06; /* 115200 Baudrate @ 12 MHz IRC */
uart->USART->DLM = 0x00;
uart->USART->FDR = 0xC1;
uart->USART->LCR = 0x03; /* DLAB = 0 */
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(uart->USART_IRQn, ((0x01 << 3) | 0x01));
@ -262,4 +278,56 @@ void rt_hw_uart_init(void)
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif
#ifdef RT_USING_UART3
uart = &uart3;
config.baud_rate = BAUD_RATE_115200;
config.bit_order = BIT_ORDER_LSB;
config.data_bits = DATA_BITS_8;
config.parity = PARITY_NONE;
config.stop_bits = STOP_BITS_1;
config.invert = NRZ_NORMAL;
config.bufsz = RT_SERIAL_RB_BUFSZ;
serial3.ops = &lpc_uart_ops;
serial3.config = config;
/* Enable GPIO register interface clock */
LPC_CCU1->CLK_M4_GPIO_CFG |= 0x01;
while (!(LPC_CCU1->CLK_M4_GPIO_STAT & 0x01));
/* Enable USART3 peripheral clock */
LPC_CCU2->CLK_APB2_USART3_CFG |= 0x01;
while (!(LPC_CCU2->CLK_APB2_USART3_STAT & 0x01));
/* Enable USART3 register interface clock */
LPC_CCU1->CLK_M4_USART3_CFG |= 0x01;
while (!(LPC_CCU1->CLK_M4_USART3_STAT & 0x01));
/* Init GPIO pins */
LPC_SCU->SFSP2_3 = (1 << 6) | /* Input buffer enabled */
(1 << 4) | /* Pull-up disabled */
(2 << 0) ; /* Pin P1_15 used as U2_TXD */
LPC_SCU->SFSP2_4 = (1 << 6) | /* Input buffer enabled */
(1 << 4) | /* Pull-up disabled */
(2 << 0) ; /* Pin P1_16 used as U2_RXD */
/* Init USART3 */
uart->USART->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
uart->USART->DLL = 0x06; /* 115200 Baudrate @ 12 MHz IRC */
uart->USART->DLM = 0x00;
uart->USART->FDR = 0xC1;
uart->USART->LCR = 0x03; /* DLAB = 0 */
/* preemption = 1, sub-priority = 1 */
NVIC_SetPriority(uart->USART_IRQn, ((0x01 << 3) | 0x01));
/* Enable Interrupt for UART channel */
NVIC_EnableIRQ(uart->USART_IRQn);
/* register UART2 device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
uart);
#endif
}