Diff: FastAnalogIn_LPC1768.cpp

Revision:

13:ccf0ab6bbe3a

Parent:

12:d9df0fc380bf

--- a/FastAnalogIn_LPC1768.cpp	Tue Mar 13 22:58:00 2018 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,125 +0,0 @@
-#ifdef TARGET_LPC1768
-
-#include "FastAnalogIn.h"
-static inline int div_round_up(int x, int y)
-{
-    return (x + (y - 1)) / y;
-}
-
-static const PinMap PinMap_ADC[] = {
-    P0_23, ADC0_0, 1,
-    P0_24, ADC0_1, 1,
-    P0_25, ADC0_2, 1,
-    P0_26, ADC0_3, 1,
-    P1_30, ADC0_4, 3,
-    P1_31, ADC0_5, 3,
-    P0_2,  ADC0_7, 2,
-    P0_3,  ADC0_6, 2,
-    NC,    NC,     0
-};
-
-static int channel_usage[8] = {0,0,0,0,0,0,0,0};
-
-FastAnalogIn::FastAnalogIn(PinName pin, bool enabled)
-{
-    ADCnumber = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
-    if (ADCnumber == (uint32_t)NC)
-        error("ADC pin mapping failed");
-    datareg = (uint32_t*) (&LPC_ADC->ADDR0 + ADCnumber);
-
-    // ensure power is turned on
-    LPC_SC->PCONP |= (1 << 12);
-    // set PCLK of ADC to /1
-    LPC_SC->PCLKSEL0 &= ~(0x3 << 24);
-    LPC_SC->PCLKSEL0 |= (0x1 << 24);
-    uint32_t PCLK = SystemCoreClock;
-
-    // calculate minimum clock divider
-    //  clkdiv = divider - 1
-    uint32_t MAX_ADC_CLK = 13000000;
-    uint32_t clkdiv = div_round_up(PCLK, MAX_ADC_CLK) - 1;
-    // Set the clkdiv
-    LPC_ADC->ADCR &= ~(255<<8);
-    LPC_ADC->ADCR |= clkdiv<<8;
-
-    //Enable ADC:
-    LPC_ADC->ADCR |= 1<<21;
-
-    //Enable burstmode, set start as zero
-    LPC_ADC->ADCR |= 1<<16;
-    LPC_ADC->ADCR &= ~(7<<24);
-
-    //Map pins
-    pinmap_pinout(pin, PinMap_ADC);
-
-    //Enable channel
-    running = false;
-    enable(enabled);
-
-}
-
-void FastAnalogIn::enable(bool enabled)
-{
-    //If currently not running
-    if (!running) {
-        if (enabled) {
-            //Enable the ADC channel
-            channel_usage[ADCnumber]++;
-            LPC_ADC->ADCR |= (1<<ADCnumber);
-            running = true;
-        } else
-            disable();
-    }
-}
-
-void FastAnalogIn::disable( void )
-{
-    //If currently running
-    if (running) {
-        channel_usage[ADCnumber]--;
-        
-        if (channel_usage[ADCnumber]==0)
-            LPC_ADC->ADCR &= ~(1<<ADCnumber);
-    }
-    running = false;
-}
-
-unsigned short FastAnalogIn::read_u16( void )
-{
-    volatile unsigned int retval;
-    //If object is enabled return current value of datareg
-    if (running)
-        retval = *datareg;
- 
-    //If it isn't running, enable it and wait until new value is written to datareg
-    else {
-        //Force a read to clear done bit, enable the ADC channel
-        retval = *datareg;
-        enable();
-        //Wait until it is converted
-        while(1) {
-            wait_us(1);
-            retval = *datareg;
-            if ((retval>>31) == 1)
-                break;
-        }
-        
-        //Do a second conversion since first one always fails for some reason
-        while(1) {
-            wait_us(1);
-            retval = *datareg;
-            if ((retval>>31) == 1)
-                break;
-        }
-
-        //Disable again
-        disable();
-    }
-    
-    //Do same thing as standard mbed lib, unused bit 0-3, replicate 4-7 in it
-    retval &= ~0xFFFF000F;
-    retval |= (retval >> 8) & 0x000F;
-    return retval;
-
-}
-#endif //defined TARGET_LPC1768