Hi, i'm trying to communicate between a msp-430f5529 (spi master) and a nrf51822 (spi slave). I have configured the MISO, MOSI, CS and SCLK of the nrf. I use the spi_slave_example for testing the communication.
When the spi transfer is completed it calls to the handle "static void spi_slave_event_handle(spi_slave_evt_t event)". As you know to the end of this function you have to set the buffer again (after you process the data that arrived) with "spi_slave_buffers_set" .I want set the new buffer data depending of the last transfer data, then i use a switch case for the first byte that arrives but this fails, i need to set the bufffer to the end of function spi_slave_event_handle(). I'm doing this:
if (event.evt_type == SPI_SLAVE_XFER_DONE)
{
SpiCommand = m_rx_buf[0];
switch (SpiCommand)
{
case 0x01:
nrf_gpio_port_set(NRF_GPIO_PORT_SELECT_PORT1, 1);
spi_slave_buffers_set(m_tx_buf, m_rx_buf, sizeof(m_tx_buf), sizeof(m_rx_buf));
break;
case 0x02: ...
break;
default:
break;
}
}
it doesn't work, the led doesn't turn on. But if i try this:
if (event.evt_type == SPI_SLAVE_XFER_DONE)
{
SpiCommand = m_rx_buf[0];
switch (SpiCommand)
{
case 0x01:
nrf_gpio_port_set(NRF_GPIO_PORT_SELECT_PORT1, 1);
break;
case 0x02: ...
break;
default:
break;
}
spi_slave_buffers_set(m_tx_buf, m_rx_buf, sizeof(m_tx_buf), sizeof(m_rx_buf));
}
It works great, the led turn on. I have to put spi_slave_buffers_set() out of the switch at the end. Why? Any idea?
