Hi,
the application is two multiplexer connected to ADC 16 bit for extend ADC 16 bit pins.
the control of the mux and mux Enabled pin controlled by PORTD.
i configure ADC To work with DMA and the ADC Conversion is triggered by Timer 2.
Timer configure to 65536Hz - 15.258usec
ADC minor loop is 2 bytes and major loop is 480bytes
ADC DMA configure to work as ping pong with two buffers.
PORTD minor loop is 4 bytes and major loop is 64 bytes.
i configured PORTD To work with DMA linked to minor loop of ADC DMA.
PORTD DMA configure to work as ping pong with the same buffer.(circular buffer)
it work properly except when the major loop of the ADC is finish, its look like the next minor loop of PORTD is missing.
the first time OF PORTD DMA is triggered by software for the first channel.
PORTD DMA Ram Data buf:
const U32 Recording_AvailableChannelSelction_Tbl[] = {
0x00000001,//0x00000080,
0x00000002,//0x00002080,
0x00000003,//0x00001080,
0x00000004,//0x00003080,
0x00000005,//0x00000880,
0x00000006,//0x00002880,
0x00000007,//0x00001880,
0x00000008,//0x00003880,
0x00000009,//0x00004080,
0x0000000A,//0x00006080,
0x0000000B,//0x00005080,
0x0000000C,//0x00007080,
0x0000000D,//0x00004880,
0x0000000E,//0x00006880,
0x0000000F,//0x00005880,
0x00000000,//0x00007880
};
i configure toggle pin on ADC DMA major loop callback and examine the change on PORTD0
i see when i get trigger on the pin in the ADC DMA callback PORTD0 is not change.
i see that the interrupt is triggered on the correct point but the DMA not start the second TCD on time.
what I'm doing wrong?
advice
