【LPC54114双核任务二】循序渐进之多核例程2.---hello world

wambob · 发表于 2017-6-26 21:39:36

本帖最后由 wambob 于 2017-6-26 21:43 编辑

看了双核的资料，有了一点点认识。SDK里给了几个多核例程，先跑个例程熟悉下。
先打开hello_world_cm4，然后再把hello_world_cm0plus添加进来

结果如下：

设置好每个工程的debug选项

先编译cm0核工程，再编译CM4工程。这个例程的目的是cm4核运行中启动cm0核并检测开关状态，按开关SW1，停止CM0核，按SW2启动CM0核，使LED闪烁，。
先修改两个开关。

对应的管脚

使用两个开关替换原例程，比如KEY0、KEY1。
然后点图标进去debug

除了原来的工程外，又自动打开了CM0工程，如上图，和普通的IAR调试界面，工具栏有了变化。

不能全速运行了，而且多出双核启动和停止等工具。先打开串口，单步看看发生了什么
cm4主函数

int main(void)
{
/* Define the init structure for the switches*/
gpio_pin_config_t sw_config = {kGPIO_DigitalInput, 0};
/* Init board hardware.*/
/* attach 12 MHz clock to FLEXCOMM0 (debug console) */
CLOCK_AttachClk(kFRO12M_to_FLEXCOMM0);
BOARD_InitPins_Core0();
BOARD_BootClockFROHF48M();
BOARD_InitDebugConsole();
/* Init switches */
GPIO_PinInit(BOARD_SW1_GPIO, BOARD_SW1_GPIO_PORT, BOARD_SW1_GPIO_PIN, &sw_config);
GPIO_PinInit(BOARD_SW2_GPIO, BOARD_SW2_GPIO_PORT, BOARD_SW2_GPIO_PIN, &sw_config);
#ifdef CORE1_IMAGE_COPY_TO_RAM
/* Calculate size of the image - not required on LPCExpresso. LPCExpresso copies image to RAM during startup
* automatically */
uint32_t core1_image_size;
core1_image_size = get_core1_image_size();
PRINTF("Copy Secondary core image to address: 0x%x, size: %d\n", CORE1_BOOT_ADDRESS, core1_image_size);
/* Copy Secondary core application from FLASH to RAM. Primary core code is executed from FLASH, Secondary from RAM
* for maximal effectivity.*/
memcpy(CORE1_BOOT_ADDRESS, (void *)CORE1_IMAGE_START, core1_image_size);
#endif
/* Initialize MCMGR before calling its API */
MCMGR_Init();
/* Boot Secondary core application */
PRINTF("Starting Secondary core.\n");
MCMGR_StartCore(kMCMGR_Core1, CORE1_BOOT_ADDRESS, 1, kMCMGR_Start_Synchronous);
/* Print the initial banner from Primary core */
PRINTF("\r\nHello World from the Primary Core!\r\n\n");
PRINTF("Press the SW1 button to Stop Secondary core.\r\n");
PRINTF("Press the SW2 button to Start Secondary core.\r\n");
while (1)
{
/* Stop secondary core execution. */
if (!GPIO_ReadPinInput(BOARD_SW1_GPIO, BOARD_SW1_GPIO_PORT, BOARD_SW1_GPIO_PIN))
{
MCMGR_StopCore(kMCMGR_Core1);
PRINTF("Stopped Secondary core.\r\n");
delay();
}
/* Start core from reset vector */
if (!GPIO_ReadPinInput(BOARD_SW2_GPIO, BOARD_SW2_GPIO_PORT, BOARD_SW2_GPIO_PIN))
{
MCMGR_StartCore(kMCMGR_Core1, CORE1_BOOT_ADDRESS, 5, kMCMGR_Start_Synchronous);
PRINTF("Started Secondary core.\r\n");
delay();
}
}
}