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