mcp3208.h File Reference

Data Structures
struct	McpAdcState
	MCP3208 ADC chip driver structure. More...

Functions
void	init_adc_mcp3208 (McpAdcState *state, SPIDriver *driver)
void	requestAdcValue (McpAdcState *state, int channel)
void	requestAdcValueI (McpAdcState *state, int channel)
void	adc_in_out (McpAdcState *state)
int	getMcp3208adc (int channel)

Function Documentation

adc_in_out()

void adc_in_out

(

McpAdcState *

state

)

Definition at line 98 of file mcp3208.cpp.

                                    {
 
//  chThdSleepMilliseconds(10);
 
    int result = state->results[0];
 
//  int v = result;
    unsigned r = 0;
//
//  while (v >>= 1)
//      r++;
//
//  unsigned int f;
//  if (r < 12) {
//      f = -1;
//  } else {
//      f = result >> (r - 12);
//      f = f & 4095;
//  }
 
    int errRatio = 1000 * adcErrorCounter / adcEventCounter;
 
    print("c/e %7d/%7d/%4d  result %5d r=%d ", adcEventCounter, adcErrorCounter, errRatio, result, r);
 
    unsigned int f0 = getValue(state, 0);
    print("ch0=%d adj %d    ", f0, f0 * 5000 / 4096);
    unsigned int f1 = getValue(state, 1);
    print("ch1=%d adj %d\r\n", f1, f1 * 5000 / 4096);
}

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getMcp3208adc()

int getMcp3208adc

(

int

channel

)

Definition at line 27 of file mcp3208.cpp.

                               {
    return getValue(hack, channel);
}

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init_adc_mcp3208()

void init_adc_mcp3208	(	McpAdcState *	state,
		SPIDriver *	driver
	)

Definition at line 128 of file mcp3208.cpp.

                                                             {
    state->driver = driver;
    state->tx_buff[2] = 0;
 
    hack = state;
 
    todo: convert to new API, todo: array of CS
    mySetPadMod("ext adc chip select", MCP3208_CS_PORT, MCP3208_CS_PIN, PAL_STM32_MODE_OUTPUT);
 
 
    spiStart(driver, &spicfg);
}

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requestAdcValue()

void requestAdcValue	(	McpAdcState *	state,
		int	channel
	)

Definition at line 82 of file mcp3208.cpp.

                                                      {
    createRequest(state, channel);
 
    spiSelect(state->driver);
    spiStartExchange(state->driver, 3, state->tx_buff, state->rx_buff);
    // SPI unselect is in the callback
}

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requestAdcValueI()

void requestAdcValueI	(	McpAdcState *	state,
		int	channel
	)

Definition at line 90 of file mcp3208.cpp.

                                                       {
    createRequest(state, channel);
 
    spiSelectI(state->driver);
    spiStartExchangeI(state->driver, 3, state->tx_buff, state->rx_buff);
    // SPI unselect is in the callback
}

Referenced by spiCallback().

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