ubuntu20.04+vscode下对杰发科技的AC7802x Cortex-M0+进行编程、编译、下载等。
开发板为杰发科技的AC780x,板载的主控芯片为AC78022,32PIN。内核为Cortex-M0+。
1、本次实验选用LED1来实现灯的开与关。原理图如下：
(资料图)
从原理图上看，LED1控制IO接到PA2，高电平制三极管导通，LED1亮，反之则关断。
从开发板原理图上，uart1接到了ch340，并配备了typc接口，本次实验选用uart1为实验串口。
拷贝一份模版到AC7802_UART。并用vscode打开。
在User/Src下新建Uart.c，gpio.c，在Inc目录下新建Uart.h、gpio.h,并把Uart.c、gpio.c加入到makefile的source中
编写gpio.h 以及 gpio.c的Led初始化代码：
#ifndef _GPIO_H__#define _GPIO_H__#include "ac780x_gpio.h"#define LED1_PORT (GPIOA)#define LED1_PIN (GPIO_PIN2)/*LED1动作定义.*/#define LED1_ON do{GPIO_SetPinLevel(LED1_PORT, LED1_PIN, GPIO_LEVEL_HIGH);}while(0)#define LED1_OFF do{GPIO_SetPinLevel(LED1_PORT, LED1_PIN, GPIO_LEVEL_LOW);}while(0)#define LED1_TOGGLE do{if(GPIO_GetPinLevel(LED1_PORT, LED1_PIN)){LED1_OFF;}else{LED1_ON;}}while(0)void GPIO_LedInit(void);#endifgpio.c
#include "gpio.h"#include "stdbool.h"void GPIO_LedInit(void){ /*初始化引脚功能,如果引脚上电后默认为GPIO,可省略掉初始化步骤. 有部分引脚上电默认为非GPIO,则必须选择其功能为GPIO才能作为GPIO使用.*/ GPIO_SetFunc(LED1_PORT, LED1_PIN, GPIO_FUN0);/*! 功能复用选择.*/ /*! 设置LED引脚为GPIO输出.*/ GPIO_SetDir(LED1_PORT, LED1_PIN, GPIO_OUT); LED1_ON;}#ifndef __UART_H__#define __UART_H__#include "ac780x_uart.h"void UART_Cfg_Init(void);#endifuart.c
/* =========================================== Includes =========================================== */#include < stdbool.h >#include "ac780x_gpio.h"#include "ac780x_uart_reg.h"#include "Uart.h"/* ============================================ Define ============================================ */#define RX_BUF_LEN 100U/* =========================================== Typedef ============================================ *//* ========================================== Variables =========================================== */uint8_t g_rxLen = 0; /*!< 串口接收长度变量 */ uint8_t g_txLen = 0; /*!< 串口发送长度变量 */uint8_t g_txCnt = 0;uint8_t g_rxBuf[RX_BUF_LEN] = {0}; /*!< 串口接收数组 */ uint8_t g_rec_state = 0;/* ==================================== Functions declaration ===================================== *//* ====================================== Functions define ======================================== *//*! * @brief 串口回调函数 * * @paramvoid *device：UART_Type pointer uint32_t wpara：UART lsr0 register uint32_t lpara：UART lsr1 register * @return none */void UART_Callback(void *device, uint32_t wpara, uint32_t lpara){ UART_Type *Uart_Device = (UART_Type *)device; /*! 串口接收中断 */ if(wpara & UART_LSR0_DR_Msk) { g_rxBuf[g_rxLen++] = UART_ReceiveData(Uart_Device); if(g_rxLen > RX_BUF_LEN) { g_rxLen = 0; } } /*!< 发送fifo空中断 */ if(Uart_Device- >IER & UART_IER_ETXE_Msk) { UART_SendData(Uart_Device,g_rxBuf[g_txCnt++]); if(g_txCnt >= g_txLen) { g_txCnt = 0; UART_SetTXEInterrupt(Uart_Device, DISABLE); } } /*!< 串口空闲中断 */ if(lpara & UART_LSR1_IDLE_Msk) { g_rec_state = 1; //UART_SetTXEInterrupt(Uart_Device, ENABLE); }}/*! * @brief uart configuration init * * @param none * @return none */void UART_Cfg_Init(void){ UART_ConfigType uart_config; GPIO_SetFunc(GPIOA, GPIO_PIN4, GPIO_FUN3); /*! uart tx */ GPIO_SetFunc(GPIOA, GPIO_PIN5, GPIO_FUN3); /*! uart rx */ uart_config.baudrate= 115200; /*! 波特率115200 */ uart_config.dataBits = UART_WORD_LEN_8BIT; /*! 数据8bit */ uart_config.stopBits = UART_STOP_1BIT; /*! 停止位1bit */ uart_config.fifoByteEn = DISABLE; uart_config.sampleCnt = UART_SMP_CNT0; /*! 16倍采样 */ uart_config.callBack = UART_Callback; /*! 回调函数设置 */ UART_Init(UART1,&uart_config); /*! 串口初始化 */ UART_SetRXNEInterrupt(UART1, ENABLE); /*! 串口接收中断使能 */ UART_SetIdleFuncEn(UART1, ENABLE); UART_SetIdleInterrupt(UART1, ENABLE); /*! 使能串口空闲中断 */ NVIC_SetPriority(UART1_IRQn, 3); /*! 串口中断优先级 */ NVIC_ClearPendingIRQ(UART1_IRQn); NVIC_EnableIRQ(UART1_IRQn);}编程的要点主要是串口中断中的空闲中断，如果触发了空闲中断，我们就认为接收一次命令完毕，更新接收标志为1.为主程序来判断提供标志位。
编写主程序如下：/* --------------------------------- Includes -------------------------------*/#include "main.h"#include "ac780x_uart_reg.h"#include "Uart.h"#include "gpio.h"/* --------------------------------- Function Prototypes --------------------*/void SystemClock_Config(void);extern uint8_t g_rxLen; /*!< 串口接收长度变量 */ extern uint8_t g_rxBuf[RX_BUF_LEN]; /*!< 串口接收数组 */ extern uint8_t g_rec_state;/** * @brief The application entry point. * * @retval int */int main(void){ SystemClock_Config(); InitDelay(); GPIO_LedInit(); UART_Cfg_Init(); while(1) { if(g_rec_state == 1) { g_rec_state = 0; if(g_rxLen >=4) { if(g_rxBuf[0] == "L" && g_rxBuf[1] == "E" && g_rxBuf[2] == "D" && g_rxBuf[3] == "O" && g_rxBuf[4] == "N") { LED1_ON; } else if(g_rxBuf[0] == "L" && g_rxBuf[1] == "E" && g_rxBuf[2] == "D" && g_rxBuf[3] == "O" && g_rxBuf[4] == "F" && g_rxBuf[5] == "F") { LED1_OFF; } g_rxLen = 0; } } }}/** * @brief System Clock Configuration * @retval None */void SystemClock_Config(void){ CKGEN_SetSysclkSrc(SYSCLK_SRC_INTERNAL_OSC); CKGEN_SetSysclkDiv(SYSCLK_DIVIDER_1); CKGEN_SetAPBClockDivider(APBCLK_DIVIDER_2);}/** * @brief This function is executed in case of error occurrence. * @param file: The file name as string. * @param line: The line in file as a number. * @retval None */void Error_Handler(char *file, int line){ /* USER CODE BEGIN Error_Handler_Debug */ /* User canadd his own implementation to handle the driver error */ while(1) { } /* USER CODE END Error_Handler_Debug */}/************************ (C) COPYRIGHT AutoChips *****END OF FILE****/lugl@lugl-virtual-machine:~/ac7802/AC7802_UART$ makearm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/Uart.d" -Wa,-a,-ad,-alms=build/Uart.lst User/Src/Uart.c -o build/Uart.oarm-none-eabi-gcc build/main.o build/AC7802x_irq_cb.o build/AC7802x_msp.o build/system_AC7802x.o build/ac780x_gpio.o build/ac780x_ckgen.o build/ac780x_spm.o build/ac780x_uart.o build/Uart.o build/gpio.o build/startup_AC7802x.o -mcpu=cortex-m0plus -mthumb -specs=nano.specs -TAC78022MBQA_FLASH.ld -lc -lm -lnosys -Wl,-Map=build/AC7802_UART.map,--cref -Wl,--gc-sections -o build/AC7802_UART.elfarm-none-eabi-size build/AC7802_UART.elf text data bss dec hex filename 12384 12 2228 14624 3920 build/AC7802_UART.elfarm-none-eabi-objcopy -O ihex build/AC7802_UART.elf build/AC7802_UART.hexarm-none-eabi-objcopy -O binary -S build/AC7802_UART.elf build/AC7802_UART.binlugl@lugl-virtual-machine:~/ac7802/AC7802_UART$ make flashpyocd flash ./build/AC7802_UART.elf --target ac78022mbqa0000415 I Loading /home/lugl/ac7802/AC7802_UART/build/AC7802_UART.elf [load_cmd][==================================================] 100%0001737 I Erased 4096 bytes (8 sectors), programmed 4096 bytes (8 pages), skipped 8704 bytes (17 pages) at 9.46 kB/s [loader]我们打开串口助手，发送LEDON、LEDOFF就可以控制LED灯的亮与灭了。
标签：
要闻