LPCUART1如何使用

[hehung]

按照例程的方式可以使用串口UART0，但是按照相同的方式不能使用UART1.

 

pin_mux.c

 

#define PIN25_IDX 25u /*!< Pin number for pin 7 in a port */
#define PIN26_IDX 26u /*!< Pin number for pin 8 in a port */

void BOARD_InitPins(void) {
CLOCK_EnableClock(kCLOCK_PortC); /* Clock Gate Control: 0x01u */
CLOCK_EnableClock(kCLOCK_PortA); /* Clock Gate Control: 0x01u */

PORT_SetPinMux(PORTC, PIN7_IDX, kPORT_MuxAlt3); /* PORTC7 (pin N2) is configured as LPUART0_RX */
PORT_SetPinMux(PORTC, PIN8_IDX, kPORT_MuxAlt3); /* PORTC8 (pin P3) is configured as LPUART0_TX */
PORT_SetPinMux(PORTA, PIN25_IDX, kPORT_MuxAlt3); /* PORTC25 (pin N2) is configured as LPUART0_RX */
PORT_SetPinMux(PORTA, PIN26_IDX, kPORT_MuxAlt3); /* PORTC26 (pin P3) is configured as LPUART0_TX */
}

board.c

 

/* Initialize debug console. */
void BOARD_InitDebugConsole(void)
{
CLOCK_SetIpSrc(kCLOCK_Lpuart0, kCLOCK_IpSrcFircAsync);
CLOCK_SetIpSrc(kCLOCK_Lpuart1, kCLOCK_IpSrcFircAsync);

uint32_t uartClkSrcFreq = BOARD_DEBUG_UART_CLK_FREQ;

DbgConsole_Init(BOARD_DEBUG_UART_BASEADDR, BOARD_DEBUG_UART_BAUDRATE, BOARD_DEBUG_UART_TYPE, uartClkSrcFreq);
}

 

main.c

/*******************************************************************************
* Definitions
******************************************************************************/
#define DEMO_LPUART LPUART1
#define DEMO_LPUART_CLKSRC kCLOCK_ScgFircAsyncDiv2Clk
#define DEMO_LPUART_CLK_FREQ CLOCK_GetFreq(kCLOCK_ScgFircAsyncDiv2Clk)

int main(void)
{
uint8_t ch;
lpuart_config_t config;

BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();

/*
* config.baudRate_Bps = 115200U;
* config.parityMode = kLPUART_ParityDisabled;
* config.stopBitCount = kLPUART_OneStopBit;
* config.txFifoWatermark = 0;
* config.rxFifoWatermark = 0;
* config.enableTx = false;
* config.enableRx = false;
*/
LPUART_GetDefaultConfig(&config);
config.baudRate_Bps = BOARD_DEBUG_UART_BAUDRATE;
config.enableTx = true;
config.enableRx = true;

LPUART_Init(DEMO_LPUART, &config, DEMO_LPUART_CLK_FREQ);

LPUART_WriteBlocking(DEMO_LPUART, txbuff, sizeof(txbuff) – 1);

while (1)
{
LPUART_ReadBlocking(DEMO_LPUART, &ch, 1);
LPUART_WriteBlocking(DEMO_LPUART, &ch, 1);
}
}

 

 

上述代码操作不能实现串口传输，UART1和UART0有什么需要区别配置的吗？

 

[Howard]

你是参照哪个例子？这里给你一些信息：

1. 检查Pin_mux配置是否正确
2. 检查对应模块的clock是否enable
3. 如果用中断方式，看看RISC-V核对应的中断向量分配，看看对应的模块中断是不是通过INTMUX触发中断的。如果是建议看看论坛其他帖子关于INTMUX中断的问题

[作者]

帖子