SmartBond™ DA14680 and DA14681

1 week ago

你好There,

Thanks for your question online. The ad_spi_transact() is calling the ad_spi_complex_transact() which is calling the hw_spi_read_buf() to read the bytes through SPI. Could you please run your code in debug code, add a breakpoint in hw_spi_read_buf() and check if ii is running correctly?

In debug mode, when calling the ad_spi_transact(), does the spi_rx_buf include the bytes you would like to read?

请您使用逻辑分析仪工具探测SPI线路并分享屏幕截图？

您还可以尝试使用AD_SPI_WRITE（）而不是AD_SPI_TRANSACT（）执行写入只执行事务。

Thanks, PM_Dialog

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1 week ago

你好

thanks for reply, in debug mode, spi_rx_buf can't read any byte, but there is one thing I want to verify, our SPI mode is 32 bits Duplex Transmissions (write & read at the same time), please refer to pic of appendix, it is oscilloscope pic of SPI signal (only show SCLK & MISO) and it's correct, the code below is right ??? it seems write followed by a read ? i am not sure

spi_tx_buf[0] = (reg_ADDRESS>> 8) & 0xff ;
spi_tx_buf[1] = reg_ADDRESS & 0xff ;
spi_tx_buf[2] = (reg_DATA>> 8) & 0xff ;
spi_tx_buf[3] = reg_DATA & 0xff ;

tx_len = 4;
rx_len = 4;

ad_spi_transact（mt6381_spi_handle，spi_tx_buf，tx_len，spi_rx_buf，rx_len）;

=============================================================

void ad_spi_complex_transact(spi_device dev, spi_transfer_data *transfers, size_t count)
{
spi_device_config *device = (spi_device_config *) dev;
const HW_SPI_ID id = device->bus_id;
size_t我;

ad_spi_device_acquire(dev);
ad_spi_bus_acquire(dev);

ad_spi_bus_activate_cs(dev);

for（i = 0; i if（转移[i] .wbuf）{
if (transfers[i].rbuf) {
HW_SPI_WRITEREAD_BUF（ID，传输[i] .wbuf，transfers [i] .rbuf，
传输[i] .length，ad_spi_wait_event，设备）;
} else {
HW_SPI_WRITE_BUF（ID，传输[i] .wbuf，传输[i] .Length，
ad_spi_wait_event，设备）;
}
} else {
hw_spi_read_buf（ID，传输[i] .rbuf，传输[i] .length，
ad_spi_wait_event，设备）;
}
OS_EVENT_WAIT(device->bus_data->event, OS_EVENT_FOREVER);
}

ad_spi_bus_deactivate_cs(dev);

ad_spi_bus_release(dev);
ad_spi_device_release（dev）;
}

void ad_spi_transact（spi_device dev，const uint8_t * wbuf，size_t wlen，uint8_t * rbuf，
size_t rlen）
{
spi_transfer_data转移[2] = {
{ wbuf, NULL, wlen },
{null，rbuf，rlen}
};

ad_spi_complex_transact（dev，transfers，1）;
}

thanks~~

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1 week ago

你好There,

你能试着跟随SPI适配器概念tutorial? Please use similar code as in prvSPITask_ECHO() task in section 5.6. Task Code for Loopback Test. As you can see in Fig. 18 SPI Duplex Transaction Captured using a Logic Analyzer, the ad_spi_complex_transact() is working fine.

Thanks, PM_Dialog

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5 days ago

你好

I can get SPI reading data now, but just only use similar code you suggest is not enough, after that, I change the SPI GPIO pin setting , finally we can get SPI reading data

原始SPI GPIO引脚设置

SPI_CS：引脚3.0

SPI_CLK：PIN3.1.

SPI_DI： pin2.1

SPI_DO： pin3.2

newest SPI GPIO pin setting

SPI_CS：引脚3.0

SPI_CLK：PIN3.1.

SPI_DI： pin3.3

SPI_DO： pin3.2

does this mean all SPI pin must configure same port ?

thanks~~

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