Hello,
I am developing a custom board for the DA14531 with two SPI devices. Both use the same setup in terms of frequency, sensitive edge, chip select polarity.
One is a peripheral, the other shall be the flash from Macronix, which is on the Development Kit Pro for the DA14531, already.
我测试了我的软件与凯尔,重用SPI的有限公司de example by rewriting some detail, writing my specific handlers and it is working. Now, the next phase: I want to boot from the Macronix flash. So I need a new Chip select signal. I am aware of the sequence reserve, initialize, use for I/O pins.
But my very first attempt to have 2 signals and 2 library functions failed.
所需的是单独的芯片选择信号。Flash的示例代码使用使用使用的设置数据结构。
Now, I need a hint, how I can make sure, the SPI controller is able to boot from flash and within my program I can make use of free cells within the flash and in a quite distinct phase, another time slot, make use of the SPI controller for my peripheral.
What do I have to write / modify / reuse, in order to operate 2 distinct but somehow similar devices on the SPI bus ?
Thanks for help
Joachim
Hi Joachim,
Thanks for your question. Could you please try to explain what is the issue? I can understand that you are planning to boot from an external SPI Flash and use the empty cells for storing your own data. Additionally, another SPI peripheral will be used. The DA14531 is booting from standard pins – please check table Table 38: Booting Sequence Steps from the datasheet. Booting for an external SPI slave is step 5 and the table 38 demonstrates the specific pins should be used. The BootROM will toggle the SCS on P01 will the flash is programmed with the application code and device boots from there.
Regarding hot to use the “free space”, you should read the SPI Flash by using the Flash Programmed from the SmartSnippets Toolbox and check in which address the application firmware is stored. After those addresses, you could store your own data.
>>>但我第一次尝试有2个信号和2个库函数失败。
Can you please indicate that?
Thanks, PM_Dialog
Hello, thanks for response!
在我的第一次尝试中，我使用了使用SPI闪存的示例代码，验证了一些交换。然后，我将其中一些代码移动到蓝牙应用程序中，并重用了闪存的那些引脚。我使用从电路板到板的电线附加了我的外围设备并写了SPI处理代码。它现在正在运行，值通过蓝牙发送。
Now, the challenge was, to have both SPI devices attached. I made the simple assumption, to reuse the code, but use just a different pin for chip select of my peripheral. MISO, CLK, MOSI have been parallel (is that aproach ok?) That did not work at the first step, even the entire bluetooth fraction was dead.
Both, the Macronix and my peripheral work with identical settings, properly.
I need advice, to extend my RAM based code, so the DA14531 will boot from flash. I basically understood the pin usage, but not the SPI library.
Greetings,
Joachim
Hi Joachim,
In which GPIOs is the peripheral is attached? If you would like to have SPI flash functionality on a BLE project, please take a look at prox_reporter example of the SDK.
To boot from SPI Flash, you should just need make share that is connected to the proper GPIOs and then burn it with the application image. Once the device is powered-up, the code from the Flash will be copied to the System-RAM and then the device boots.
In order to interact with the SPI peripheral, you need to init and configure it with the correct parameter, interact with is and then release it.
Thanks, PM_Dialog
Thanks for your answer.
The GPIO I will use, is just a free one, only used to control the additional SPI Chip Select. I will use one, which is wired to a header on the base board of the kit.
I will takea look into the prox_reporter example code.
I understood, which pins are to be used for the flash - just those, which can be jumpered, at delivery of the Pro kit.
要烧它，我明白采取RAM运行二进制（BIN）文件。使用智能工具包。
I need to reserve my extra GPIO, then initialize that I/O cell as the one which is used for the flash. In order to use my peripheral, I need my own chip_select function, using my new GPIO, using the device and after any use, I have to return the new GPIO pin with chip_select back to inactive.
我可以使用完全相同的库函数来传输（例如SPI控制器队列）。
If my SPI device is talking with identical parameters, I only need another controlling structure for the SPI library (?).
Is that correct ?
我试过这种方法，但可能有一些错误，某个地方。我需要再做一次。
问候，joachim
Hi joachimkr,
You need to select and configure in which device will “talk” each time. To be honest I am haven’t understood it correctly your statement in bold, but the concept is that you should select which device takes the SPI bus each time.
Thanks, PM_Dialog