NuMaker-M032BTAI蓝牙单片机测评过程分享

只看该作者 · 2022-5-17 14:54

近日参加新唐活动，获得了最新蓝牙单片机M032BT系列的开发板首发体验活动。非常开心，感谢新唐。

以下是厂家提供的手册上的图片，跟M032BT开发板的外观看起来几乎一模一样。

刚收到板子没有开发资料，无从下手，默认的程序也没看到有蓝牙信号，以为板子有问题或者手机有问题呢。
今天收到了官方提供的开发资料，烧录后发现还是不行，竟然报错了。

In Hard Fault Handler
r0  = 0x0
r1  = 0xf5
r2  = 0x40061000
r3  = 0x3e
r12 = 0xffffffff
lr  = 0x4a69
pc  = 0x3548
psr = 0x21000015
我粗略看了一下程序，觉得没毛病啊。而且debug除错操作发现进入了

/* Initialize RF PHY */
RF_Init();
产生的错误，而产生这个错误是在BLE.lib的，我就急不可耐的给新唐技术通过官网的渠道发了咨询。
然后才认真的看芯片的技术手册和BLE操作的相关说明文档，然后对照程序一步一步的看，发现了问题所在。新唐的BLE.lib是绝对没问题的。
是我错以为这是新唐针对M032BT的例子了，原来不是，是针对M031BT的，我被下面三行代码迷惑了

#define _CHIP_M031BT                   0
#define _CHIP_M032BT                   1
#define _CHIP_SELECTION_             _CHIP_M031BT
以为厂家提供的代码已经在第二行设置为1了，没想到第三行才是坑。
需要修改成

#define _CHIP_M031BT                   0
#define _CHIP_M032BT                   1
#define _CHIP_SELECTION_             _CHIP_M032BT
根据技术手册，蓝牙模块是挂载在SPI0内部端口的
而该端口的初始化如下所示，如果默认是M031BT，则编译对应的M031BT的管脚，而这两个型号的内部管脚是不同的地址。因此需要做如上修改。

修改后，保存，重新编译烧录
串口打印消息：

----------------------------------
BLE demo: LED control start...
----------------------------------
BLE device address from UID: c0:00:b5:a1:47:09

Advertising...

这个时候打开手机蓝牙，发现已经可以看到我使用的这个工程的名字了：nuvoton_LED
安装新唐提供的APK软件，扫描，然后找到上面的蓝牙信号名字，单击连接，然后就可以控制LED的开关了。

在连接和开关断开的时候串口还打印出了相关信息

Disconnected, ID:0, Reason:0x13
Advertising...
Status=0, Connected to 78:77:f6:7d:a1:08
Connection updated
Status: 0, Interval: 6, Latency: 0, Supervision Timeout: 500
Connection updated
Status: 0, Interval: 39, Latency: 0, Supervision Timeout: 500
结合厂家提供的测试例程，可以看出通过蓝牙进行数据收发非常简单，这大大降低了基于蓝牙的单片机应用开发难度，非常完美的一款具备蓝牙收发功能的单片机。
奉上该例程的main.c以供欣赏。

只看该作者 · 2022-5-17 14:56

/**************************************************************************//**
* @file    main.c
* @version  V0.9
* $Revision: 01 $
* @brief
*          Demonstrate BLE operation.
*          Includes the basic initialization and the loop for kernel(BLE) operations.
* @note
*
******************************************************************************/
#include <stdio.h>
#include "rf_phy.h"
#include "porting_flash.h"
#include "porting_misc.h"
#include "porting_spi.h"
#include "mcu_definition.h"

#pragma push
//#pragma Otime
#pragma Ospace

/*!
rief Initial necessary peripheral on MCU.
*/
void SYS_Init(void)
{
int8_t irqno;

/* Unlock protected registers */
SYS_UnlockReg();

/*---------------------------------------------------------------------------------------------------------*/
/* Init System clock                                                                                     */
/*---------------------------------------------------------------------------------------------------------*/

#if (_USE_MCU_CLK_==MCU_CLK_SOURCE_HXT) //HXT
GPIO_SetMode(PF, (BIT2 | BIT3), GPIO_MODE_INPUT);
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk | CLK_PWRCTL_HIRCEN_Msk);
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk | CLK_STATUS_HIRCSTB_Msk);
#else                                  //HIRC
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
#endif

/* Set both PCLK0 and PCLK1 as HCLK/PCLK_DIV */
#if (PCLK_DIV==4)
CLK->PCLKDIV = CLK_PCLKDIV_APB0DIV_DIV4 | CLK_PCLKDIV_APB1DIV_DIV4;
#elif (PCLK_DIV==2)
CLK->PCLKDIV = CLK_PCLKDIV_APB0DIV_DIv2 | CLK_PCLKDIV_APB1DIV_DIV2;  //48/2=24MHz
#elif (PCLK_DIV==1)
CLK->PCLKDIV = CLK_PCLKDIV_APB0DIV_DIV1 | CLK_PCLKDIV_APB1DIV_DIV1;
#endif //(PCLK_DIV==4)

//debug print use UART0
/* Select HIRC as the clock source of UART0 */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));

/* Enable UART peripheral clock */
CLK_EnableModuleClock(UART0_MODULE);

/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function                                                                               */
/*---------------------------------------------------------------------------------------------------------*/
/* Set PA multi-function pins for UART0 RXD=PA.0 and TXD=PA.1 */
SYS->GPA_MFPL = (SYS->GPA_MFPL & ~(SYS_GPA_MFPL_PA0MFP_Msk | SYS_GPA_MFPL_PA1MFP_Msk)) |
                  (SYS_GPA_MFPL_PA0MFP_UART0_RXD | SYS_GPA_MFPL_PA1MFP_UART0_TXD);

/* Set only BLE interrupt with the highest priority to make sure RF can handle event in time */
for (irqno = BOD_IRQn; irqno <= RTC_IRQn; irqno++)
{
      NVIC_SetPriority((IRQn_Type)irqno, 1);
}
#if (_CHIP_SELECTION_ == _CHIP_M031BT)
NVIC_SetPriority(GPIO_PCPDPEPF_IRQn, 0);
#elif (_CHIP_SELECTION_ == _CHIP_M032BT)
NVIC_SetPriority(EINT135_IRQn, 0);
#endif

/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and CyclesPerUs automatically. */
SystemCoreClockUpdate();
/* Lock protected registers */
SYS_LockReg();
}

void RF_Open(void)
{
/* Wait RF PHY stable */
CLK_SysTickDelay(200000);       // MUST wait for stable voltage( >= 1.8V) after power-up

/* Initialize GPIO reset pin */
MCU_GpioResetInit();

/* Do Gpio Reset */
MCU_GpioReset();
CLK_SysTickDelay(50000);

/* SPI IO remapping */
RF_SpiIoMapping();

/* initial SPI PDMA */
SPI_PDMA_Init();

/* Initialize RF PHY */
RF_Init();
}

/*!
rief main loop for initialization and BLE kernel
*/
int main(void)
{
extern void BleApp_Main(void);
extern void BleApp_Init(void);
extern BleStackStatus Set_BleAddr(void);

/* Init System, IP clock and multi-function I/O. */
SYS_Init();

/* Open UART0 for debug */
UART_Open(UART0, 115200);

/* Enable the BLE RF PHY */
RF_Open();

printf("----------------------------------
");
printf("  BLE demo: LED control start...
");
printf("----------------------------------
");

/* Set BLE device address */
Set_BleAddr();

/* Initial BLE App */
BleApp_Init();

while (1)
{
      /* Run BLE kernel, the task priority is LL > Host */
      if (Ble_Kernel_Root() == BLESTACK_STATUS_FREE)
      {
         BleApp_Main();

         /* System enter Power Down mode & wait interrupt event. */
         System_PowerDown();
      }
}
}
#pragma pop