rt-thread-official/bsp/CME_M7/StdPeriph_Driver/src/cmem7_adc.c

/**
	*****************************************************************************
	* @file     cmem7_adc.c
	*
	* @brief    CMEM7 ADC source file
	*
	*
	* @version  V1.0
	* @date     3. September 2013
	*
	* @note               
	*           
	*****************************************************************************
	* @attention
	*
	* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
	* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
	* TIME. AS A RESULT, CAPITAL-MICRO SHALL NOT BE HELD LIABLE FOR ANY DIRECT, 
	* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
	* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
	* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
	*
	* <h2><center>&copy; COPYRIGHT 2013 Capital-micro </center></h2>
	*****************************************************************************
	*/
	
#include "cmem7_adc.h"
#include "cmem7.h"

#define ADC_SYSTEM_MODE_IDLE       0

static BOOL adc_IsMultiChannel(uint32_t channel) {
	uint32_t i = 0;
  
	for (i = 0; channel != 0; i++) {
    channel &= (channel - 1);
	}
	
	return ((i > 1) ? TRUE : FALSE);
}

static uint8_t adc_GetChannel(uint32_t channel) {
	uint32_t i = 0;
  
	for (i = 0; channel > 1; i++) {
    channel >>= 1;
	}
	
	return i;
}

static void adc_Reset(uint8_t adc, BOOL enable) {
	if (adc == ADC_PERIPH_1) {
		ADC->POWERDOWN_RESET_b.POWERDOWN_ADC1 = TRUE;
		ADC->POWERDOWN_RESET_b.RESET_ADC1 = TRUE;
		udelay(8000);
		if (enable) {
			ADC->POWERDOWN_RESET_b.POWERDOWN_ADC1 = FALSE;
			ADC->POWERDOWN_RESET_b.RESET_ADC1 = FALSE;
			udelay(8000);
		}
	} else {
		ADC->POWERDOWN_RESET_b.POWERDOWN_ADC2 = TRUE;
		ADC->POWERDOWN_RESET_b.RESET_ADC2 = TRUE;
		udelay(8000);
		if (enable) {
			ADC->POWERDOWN_RESET_b.POWERDOWN_ADC2 = FALSE;
			ADC->POWERDOWN_RESET_b.RESET_ADC2 = FALSE;
			udelay(8000);
		}
	}
}

void ADC_Init(ADC_InitTypeDef* init) {
	assert_param(init);
	assert_param(IS_ADC_PHASE_CTRL(init->ADC_PhaseCtrl));
	assert_param(IS_ADC_VSEN(init->ADC_VsenSelection));
	
	SOFT_RESET->SOFTRST_b.ADC_n = 0;
	SOFT_RESET->SOFTRST_b.ADC_n = 1;
	
	ADC->CFG0_b.PHASE_CTRL = init->ADC_PhaseCtrl;
	ADC->CFG0_b.VSEN = init->ADC_VsenSelection;
}

void ADC_Enable(uint8_t adc, BOOL enable) {
	assert_param(IS_ADC_ALL_PERIPH(adc));
	
	adc_Reset(adc, enable);
}

void ADC_EnableInt(uint32_t Int, BOOL enable) {
	assert_param(IS_ADC_INT(Int));
	
	if (enable) {
	  ADC->INT_MASK &= ~Int;
	} else {
		ADC->INT_MASK |= Int;
	}
}

BOOL ADC_GetIntStatus(uint32_t Int) {
	assert_param(IS_ADC_INT(Int));
	
	if (0 != (ADC->INT_STATUS & Int)) {
		return TRUE;
	}
	
	return FALSE;
}

void ADC_ClearInt(uint32_t Int) {
	assert_param(IS_ADC_INT(Int));
	
	ADC->INT_STATUS = Int;
}

BOOL ADC_StartConversion(uint8_t adc, uint8_t convMode, uint32_t channel) {
	assert_param(IS_ADC_ALL_PERIPH(adc));
	assert_param(IS_ADC_CONVERSION(convMode));
	
	if (adc == ADC_PERIPH_1) {
		assert_param(IS_ADC1_CHANNEL(channel));
		if (ADC->BUSY_b.ADC1_BUSY) {
			return FALSE;
		}
		
		if (adc_IsMultiChannel(channel)) {
			ADC->CFG_ADC1_b.SYSTEM_MODE = ADC_SYSTEM_MODE_SINGLE_CONV;
			ADC->CFG_ADC1_b.MULTI_CHANNEL_BIT = channel;
			ADC->CFG_ADC1_b.MULTI_CHANNEL_CONTINUE_SCAN = 
				(convMode == ADC_SYSTEM_MODE_CONTINUOUS_CONV) ? 1 : 0;
		} else {
			ADC->CFG_ADC1_b.SYSTEM_MODE = convMode;
				
			if (convMode == ADC_SYSTEM_MODE_CONTINUOUS_CONV) {
				ADC->CFG_ADC1_b.CHANNEL_SEL = adc_GetChannel(channel);
			} else {
				ADC->CFG_ADC1_b.MULTI_CHANNEL_BIT = channel;
				ADC->CFG_ADC1_b.MULTI_CHANNEL_CONTINUE_SCAN = 0;
			}				
		}
				
		ADC->ADC1_START_b.EN = TRUE;
	} else {
		assert_param(IS_ADC2_CHANNEL(channel));
		if (ADC->BUSY_b.ADC2_BUSY) {
			return FALSE;
		}		
		
		if (adc_IsMultiChannel(channel)) {
			ADC->CFG_ADC2_b.SYSTEM_MODE = ADC_SYSTEM_MODE_SINGLE_CONV;
			ADC->CFG_ADC2_b.MULTI_CHANNEL_BIT = channel;
			ADC->CFG_ADC2_b.MULTI_CHANNEL_CONTINUE_SCAN = 
				(convMode == ADC_SYSTEM_MODE_CONTINUOUS_CONV) ? 1 : 0;
		} else {
			ADC->CFG_ADC2_b.SYSTEM_MODE = convMode;
				
			if (convMode == ADC_SYSTEM_MODE_CONTINUOUS_CONV) {
				ADC->CFG_ADC2_b.CHANNEL_SEL = adc_GetChannel(channel);
			} else {
				ADC->CFG_ADC2_b.MULTI_CHANNEL_BIT = channel;
				ADC->CFG_ADC2_b.MULTI_CHANNEL_CONTINUE_SCAN = 0;
			}				
		}
				
		ADC->ADC2_START_b.EN = TRUE;
	}
	
	return TRUE;
}

BOOL ADC_StartCalibration(uint8_t adc, uint8_t calibration) {
	assert_param(IS_ADC_ALL_PERIPH(adc));
	assert_param(IS_ADC_CALIBRATION(calibration));
	
	if (adc == ADC_PERIPH_1) {
		if (ADC->BUSY_b.ADC1_BUSY) {
			return FALSE;
		}
		
		ADC->CFG_ADC1_b.SYSTEM_MODE = calibration;
		ADC->ADC1_START_b.EN = TRUE;
	} else {
		if (ADC->BUSY_b.ADC2_BUSY) {
			return FALSE;
		}

		ADC->CFG_ADC2_b.SYSTEM_MODE = calibration;
		ADC->ADC2_START_b.EN = TRUE;
	}
	
	return TRUE;	
}

void ADC_Stop(uint8_t adc) {
	assert_param(IS_ADC_ALL_PERIPH(adc));
	
	if (adc == ADC_PERIPH_1) {
		if (IS_ADC_CONVERSION(ADC->CFG_ADC1_b.SYSTEM_MODE)) {
			ADC->ADC1_STOP_b.EN = TRUE;
		}
		while (ADC->BUSY_b.ADC1_BUSY) ;
		
		ADC->ADC1_FIFO_CLEAR_b.CLEAR = TRUE;
		//udelay(1000);
		ADC->ADC1_FIFO_CLEAR_b.CLEAR = FALSE;
	} else {
		if (IS_ADC_CONVERSION(ADC->CFG_ADC2_b.SYSTEM_MODE)) {
			ADC->ADC2_STOP_b.EN = TRUE;
		}
		while (ADC->BUSY_b.ADC2_BUSY) ;
			
		ADC->ADC2_FIFO_CLEAR_b.CLEAR = TRUE;
		//udelay(1000);
		ADC->ADC2_FIFO_CLEAR_b.CLEAR = FALSE;
	}	
}

BOOL ADC_IsBusy(uint8_t adc) {
	assert_param(IS_ADC_ALL_PERIPH(adc));
	
	if (adc == ADC_PERIPH_1) {
		if (ADC->BUSY_b.ADC1_BUSY) {
			return TRUE;
		}
	} else {
		if (ADC->BUSY_b.ADC2_BUSY) {
			return TRUE;
		}
	}
	
	return FALSE;
}

/* return value is actual read data size */
uint8_t ADC_Read(uint8_t adc, uint8_t size, ADC_Data* data) {
	uint8_t count = 0;
	uint8_t sysMode;
	uint32_t tmp = 0;
	assert_param(IS_ADC_ALL_PERIPH(adc));
	assert_param(data);
	
	if (adc == ADC_PERIPH_1) {
		sysMode = ADC->CFG_ADC1_b.SYSTEM_MODE;
	} else {
		sysMode = ADC->CFG_ADC2_b.SYSTEM_MODE;
	}
	
	if ((sysMode == ADC_SYSTEM_MODE_SINGLE_CONV) ||
		(sysMode == ADC_SYSTEM_MODE_CONTINUOUS_CONV)) {
		while (count < size) {
			if (adc == ADC_PERIPH_1) {
				if (ADC->STATUS_b.ADC1_READ_EMPTY) {
					break;
				}
				
				tmp = ADC->ADC1_FIFO_READ;
				(data + count)->channel = 1 << ((tmp&0xf000) >> 12);
				(data + count++)->data = (tmp & 0xfff);
			} else {
				if (ADC->STATUS_b.ADC2_READ_EMPTY) {
					break;
				}
				tmp = ADC->ADC2_FIFO_READ;
				(data + count)->channel = 1 << ((tmp&0xf000) >> 12);
				(data + count++)->data = (tmp & 0xfff);
			}
		}
	} else if (sysMode == ADC_CALIBRATION_OFFSET) {
		if (adc == ADC_PERIPH_1) {
			if (!ADC->BUSY_b.ADC1_BUSY) {
				(data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC1_OUT_OFFSET_CALIBRATION;
		  }	
		} else {
			if (!ADC->BUSY_b.ADC2_BUSY) {
				(data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC2_OUT_OFFSET_CALIBRATION;
		  }
		}
	} else if (sysMode == ADC_CALIBRATION_NEGTIVE_GAIN) {	
		if (adc == ADC_PERIPH_1) {
			if (!ADC->BUSY_b.ADC1_BUSY) {
				(data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC1_OUT_NEGTIVE_GAIN_CALIBRATION;
			}	
		} else {
			if (!ADC->BUSY_b.ADC2_BUSY) {
			  (data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC2_OUT_NEGTIVE_GAIN_CALIBRATION;
		  }
		}
	} else {
		if (adc == ADC_PERIPH_1) {
			if (!ADC->BUSY_b.ADC1_BUSY) {
				(data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC1_OUT_POSITIVE_GAIN_CALIBRATION;
			}	
		} else {
			if (!ADC->BUSY_b.ADC2_BUSY) {
			  (data + count)->channel = ADC_CHANNEL_CALIBRATION;
				(data + count++)->data = ADC->ADC2_OUT_POSITIVE_GAIN_CALIBRATION;
		  }
		}
	}
	
	return count;
}