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【FireBLE试用体验】之UART

2015-8-18 21:54:37 2524 开发板

0 串口是单片机中最基本的操作，今天我们就用FireBLE来操作下串口。实验目的：使用FireBLE提供的串口，在上位发送一段数字，下位机再把数字返回给上位机。实验电路： FireBLE开发板使用了一个PL2303芯片，把UART0转换到电脑的USB虚拟串口。实验步骤：我们还是使用QBlue的QnDriverTools生成GPIO的配置 // P0.0 -> UART0 [TX] Pull Up Drive ability: Low // P0.3 -> GPIO Pull Up Drive ability: Low // P0.6 -> SWD [DAT] Pull Up Drive ability: Low // P0.7 -> SWD [CLK] Pull Up Drive ability: Low // P1.0 -> GPIO Pull Up Drive ability: Low // P1.1 -> GPIO Pull Up Drive ability: Low // P1.2 -> GPIO Pull Up Drive ability: Low // P1.3 -> GPIO Pull Up Drive ability: Low // P1.7 -> UART0 [RX] Pull Up Drive ability: Low // P2.3 -> GPIO Pull Up Drive ability: Low // P2.4 -> GPIO Pull Up Drive ability: Low // P2.6 -> GPIO Pull Up Drive ability: Low // P2.7 -> GPIO Pull Up Drive ability: Low // P3.0 -> GPIO Pull Up Drive ability: Low // P3.1 -> GPIO Pull Up Drive ability: Low //Pin Mux Control Register syscon_SetPMCR0(QN_SYSCON, P00_UART0_TXD_PIN_CTRL \| P03_GPIO_3_PIN_CTRL \| P06_SW_DAT_PIN_CTRL \| P07_SW_CLK_PIN_CTRL \| P10_GPIO_8_PIN_CTRL \| P11_GPIO_9_PIN_CTRL \| P12_GPIO_10_PIN_CTRL \| P13_GPIO_11_PIN_CTRL \| P17_UART0_RXD_PIN_CTRL); //Pin Mux Control Register syscon_SetPMCR1(QN_SYSCON, P23_GPIO_19_PIN_CTRL \| P24_GPIO_20_PIN_CTRL \| P26_GPIO_22_PIN_CTRL \| P27_GPIO_23_PIN_CTRL \| P30_GPIO_24_PIN_CTRL \| P31_GPIO_25_PIN_CTRL); //Pull Control Register syscon_SetPPCR0(QN_SYSCON, 0xAAAAAAAA); //Pull Control Register syscon_SetPPCR1(QN_SYSCON, 0xAAAAAAAA); //Drive ability Control Register syscon_SetPDCR(QN_SYSCON, 0x00000000); 复制代码把这个代码替换掉system.c的SystemIOCfg函数。在Driver_config.h文件里，我们可以不用的模块定义成FALSE. 主程序代码如下： #include "uart.h" #include "system.h" /发送接收缓冲/ uint8_t buffer[16]; /接收完成回调/ void rx_callback(void) { uart_printf(QN_UART0,(uint8_t)"FireBLE recvive data:n"); uart_write(QN_UART0,buffer,8,NULL); } int main(void) { /系统初始化/ SystemInit(); /串口初始化/ uart_init(QN_UART0,__USART_CLK,UART_115200); uart_tx_enable(QN_UART0,MASK_ENABLE); uart_rx_enable(QN_UART0,MASK_ENABLE); uart_clock_on(QN_UART0); uart_printf(QN_UART0,(uint8_t)"Hello world,I'm form FireBLE.n"); while(true) { //接收数据 uart_read(QN_UART0,buffer,8,rx_callback); delay(100000); } } 复制代码实验现象：上位机打开串口，复位FireBLE，上位机上显示上位机发送文本12347890，下位机接收后回送回来如下： 0
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